概述
目录
限制问题日志
错误代码跟踪
异常问题分析
DruidDataSource源码
参考阅读
首先声明：这个锅不是 DruidDataSource的问题，请放心使用 DruidDataSource。
DS是关系型数据库服务（Relational Database Service）的简称，是一种即开即用、稳定可靠、可弹性伸缩的在线数据库服务。具有多重安全防护措施和完善的性能监控体系，并提供专业的数据库备份、恢复及优化方案，使您能专注于应用开发和业务发展。
问题描述：使用JDBC和Hikari连接RDS都可以正常启动服务，使用DruidDataSource连接RDS却启动不起来，最后是因为程序授权 license导致服务启动失败，而DruidDataSource的警告异常是系统安全级别的提示而已 。
限制问题日志
主要提示的是sun.misc.Unsafe.park(Native method) ，此问题可能是系统级别的安全限制，虽然也有AQS异常，本质上应该涉及到系统Native方法调用。
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2576)
17-Sep-2020 18:09:21.112 WARNING [localhost-startStop-1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [forestar-patrol-ywpt] appears to have started a thread named [Druid-ConnectionPool-Destroy-869651846] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.lang.Thread.sleep(Native Method)
com.alibaba.druid.pool.DruidDataSource$DestroyConnectionThread.run(DruidDataSource.java:2672)
17-Sep-2020 18:09:21.113 WARNING [localhost-startStop-1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [forestar-patrol-ywpt] appears to have started a thread named [fsCacheManager] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.net.SocketInputStream.socketRead0(Native Method)
java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
java.net.SocketInputStream.read(SocketInputStream.java:171)
java.net.SocketInputStream.read(SocketInputStream.java:141)
java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
java.io.BufferedInputStream.read1(BufferedInputStream.java:286)
java.io.BufferedInputStream.read(BufferedInputStream.java:345)
sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:735)
sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:678)
sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1587)
sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
net.sf.ehcache.util.UpdateChecker.getUpdateProperties(UpdateChecker.java:106)
net.sf.ehcache.util.UpdateChecker.doCheck(UpdateChecker.java:70)
net.sf.ehcache.util.UpdateChecker.checkForUpdate(UpdateChecker.java:60)
net.sf.ehcache.util.UpdateChecker.run(UpdateChecker.java:51)
java.util.TimerThread.mainLoop(Timer.java:555)
java.util.TimerThread.run(Timer.java:505)
17-Sep-2020 18:09:21.113 WARNING [localhost-startStop-1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [forestar-patrol-ywpt] appears to have started a thread named [SimplePageCachingFilter.data] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
java.lang.Thread.run(Thread.java:748)
17-Sep-2020 18:09:21.114 WARNING [localhost-startStop-1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [forestar-patrol-ywpt] appears to have started a thread named [MedataCache.data] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
java.lang.Thread.run(Thread.java:748)
错误代码跟踪
错误点1：
错误点2：
异常问题分析
错误点1分析：这里是AQS队列阻塞。
定位到park底层调用的是Native方法：这里就是将线程的进行阻塞的方法。
setBlocker方法本身是调用本地系统Native硬件方法：
而UNSAFE的方法都是本地硬件Native方法：
问题点2是同个线程引发的问题实质上是问题1。
DruidDataSource源码
阿里Druid项目代码：https://github.com/alibaba/druid
解决方法参考：RDS的mysql无法正常连接 ，或者更换数据源
/*
* Copyright 1999-2018 Alibaba Group Holding Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.alibaba.druid.pool;
import static com.alibaba.druid.util.Utils.getBoolean;
import java.io.Closeable;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.ConcurrentModificationException;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.ServiceLoader;
import java.util.StringTokenizer;
import java.util.TimeZone;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Future;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLongFieldUpdater;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import javax.management.JMException;
import javax.management.MBeanRegistration;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import javax.naming.NamingException;
import javax.naming.Reference;
import javax.naming.Referenceable;
import javax.naming.StringRefAddr;
import javax.sql.ConnectionEvent;
import javax.sql.ConnectionEventListener;
import javax.sql.ConnectionPoolDataSource;
import javax.sql.PooledConnection;
import com.alibaba.druid.Constants;
import com.alibaba.druid.TransactionTimeoutException;
import com.alibaba.druid.VERSION;
import com.alibaba.druid.filter.AutoLoad;
import com.alibaba.druid.filter.Filter;
import com.alibaba.druid.filter.FilterChainImpl;
import com.alibaba.druid.mock.MockDriver;
import com.alibaba.druid.pool.DruidPooledPreparedStatement.PreparedStatementKey;
import com.alibaba.druid.pool.vendor.DB2ExceptionSorter;
import com.alibaba.druid.pool.vendor.InformixExceptionSorter;
import com.alibaba.druid.pool.vendor.MSSQLValidConnectionChecker;
import com.alibaba.druid.pool.vendor.MockExceptionSorter;
import com.alibaba.druid.pool.vendor.MySqlExceptionSorter;
import com.alibaba.druid.pool.vendor.MySqlValidConnectionChecker;
import com.alibaba.druid.pool.vendor.NullExceptionSorter;
import com.alibaba.druid.pool.vendor.OracleExceptionSorter;
import com.alibaba.druid.pool.vendor.OracleValidConnectionChecker;
import com.alibaba.druid.pool.vendor.PGExceptionSorter;
import com.alibaba.druid.pool.vendor.PGValidConnectionChecker;
import com.alibaba.druid.pool.vendor.SybaseExceptionSorter;
import com.alibaba.druid.proxy.DruidDriver;
import com.alibaba.druid.proxy.jdbc.DataSourceProxyConfig;
import com.alibaba.druid.proxy.jdbc.TransactionInfo;
import com.alibaba.druid.sql.ast.SQLStatement;
import com.alibaba.druid.sql.ast.statement.SQLSelectQuery;
import com.alibaba.druid.sql.ast.statement.SQLSelectQueryBlock;
import com.alibaba.druid.sql.ast.statement.SQLSelectStatement;
import com.alibaba.druid.sql.parser.SQLParserUtils;
import com.alibaba.druid.sql.parser.SQLStatementParser;
import com.alibaba.druid.stat.DruidDataSourceStatManager;
import com.alibaba.druid.stat.JdbcDataSourceStat;
import com.alibaba.druid.stat.JdbcSqlStat;
import com.alibaba.druid.stat.JdbcSqlStatValue;
import com.alibaba.druid.support.logging.Log;
import com.alibaba.druid.support.logging.LogFactory;
import com.alibaba.druid.util.JMXUtils;
import com.alibaba.druid.util.JdbcConstants;
import com.alibaba.druid.util.JdbcUtils;
import com.alibaba.druid.util.StringUtils;
import com.alibaba.druid.util.Utils;
import com.alibaba.druid.wall.WallFilter;
import com.alibaba.druid.wall.WallProviderStatValue;
/**
* @author ljw [ljw2083@alibaba-inc.com]
* @author wenshao [szujobs@hotmail.com]
*/
public class DruidDataSource extends DruidAbstractDataSource implements DruidDataSourceMBean, ManagedDataSource, Referenceable, Closeable, Cloneable, ConnectionPoolDataSource, MBeanRegistration {
private final static Log LOG = LogFactory.getLog(DruidDataSource.class);
private static final long serialVersionUID = 1L;
// stats
private volatile long recycleErrorCount = 0L;
private long connectCount = 0L;
private long closeCount = 0L;
private volatile long connectErrorCount = 0L;
private long recycleCount = 0L;
private long removeAbandonedCount = 0L;
private long notEmptyWaitCount = 0L;
private long notEmptySignalCount = 0L;
private long notEmptyWaitNanos = 0L;
private int keepAliveCheckCount = 0;
private int activePeak = 0;
private long activePeakTime = 0;
private int poolingPeak = 0;
private long poolingPeakTime = 0;
// store
private volatile DruidConnectionHolder[] connections;
private int poolingCount = 0;
private int activeCount = 0;
private volatile long discardCount = 0;
private int notEmptyWaitThreadCount = 0;
private int notEmptyWaitThreadPeak = 0;
//
private DruidConnectionHolder[] evictConnections;
private DruidConnectionHolder[] keepAliveConnections;
// threads
private volatile ScheduledFuture<?> destroySchedulerFuture;
private DestroyTask destroyTask;
private volatile Future<?> createSchedulerFuture;
private CreateConnectionThread createConnectionThread;
private DestroyConnectionThread destroyConnectionThread;
private LogStatsThread logStatsThread;
private int createTaskCount;
private final CountDownLatch initedLatch = new CountDownLatch(2);
private volatile boolean enable = true;
private boolean resetStatEnable = true;
private volatile long resetCount = 0L;
private String initStackTrace;
private volatile boolean closing = false;
private volatile boolean closed = false;
private long closeTimeMillis = -1L;
protected JdbcDataSourceStat dataSourceStat;
private boolean useGlobalDataSourceStat = false;
private boolean mbeanRegistered = false;
public static ThreadLocal<Long> waitNanosLocal = new ThreadLocal<Long>();
private boolean logDifferentThread = true;
private volatile boolean keepAlive = false;
private boolean asyncInit = false;
protected boolean killWhenSocketReadTimeout = false;
private static List<Filter> autoFilters = null;
private boolean loadSpifilterSkip = false;
protected static final AtomicLongFieldUpdater<DruidDataSource> recycleErrorCountUpdater
= AtomicLongFieldUpdater.newUpdater(DruidDataSource.class, "recycleErrorCount");
protected static final AtomicLongFieldUpdater<DruidDataSource> connectErrorCountUpdater
= AtomicLongFieldUpdater.newUpdater(DruidDataSource.class, "connectErrorCount");
protected static final AtomicLongFieldUpdater<DruidDataSource> resetCountUpdater
= AtomicLongFieldUpdater.newUpdater(DruidDataSource.class, "resetCount");
public DruidDataSource(){
this(false);
}
public DruidDataSource(boolean fairLock){
super(fairLock);
configFromPropety(System.getProperties());
}
public boolean isAsyncInit() {
return asyncInit;
}
public void setAsyncInit(boolean asyncInit) {
this.asyncInit = asyncInit;
}
public void configFromPropety(Properties properties) {
{
String property = properties.getProperty("druid.name");
if (property != null) {
this.setName(property);
}
}
{
String property = properties.getProperty("druid.url");
if (property != null) {
this.setUrl(property);
}
}
{
String property = properties.getProperty("druid.username");
if (property != null) {
this.setUsername(property);
}
}
{
String property = properties.getProperty("druid.password");
if (property != null) {
this.setPassword(property);
}
}
{
Boolean value = getBoolean(properties, "druid.testWhileIdle");
if (value != null) {
this.testWhileIdle = value;
}
}
{
Boolean value = getBoolean(properties, "druid.testOnBorrow");
if (value != null) {
this.testOnBorrow = value;
}
}
{
String property = properties.getProperty("druid.validationQuery");
if (property != null && property.length() > 0) {
this.setValidationQuery(property);
}
}
{
Boolean value = getBoolean(properties, "druid.useGlobalDataSourceStat");
if (value != null) {
this.setUseGlobalDataSourceStat(value);
}
}
{
Boolean value = getBoolean(properties, "druid.useGloalDataSourceStat"); // compatible for early versions
if (value != null) {
this.setUseGlobalDataSourceStat(value);
}
}
{
Boolean value = getBoolean(properties, "druid.asyncInit"); // compatible for early versions
if (value != null) {
this.setAsyncInit(value);
}
}
{
String property = properties.getProperty("druid.filters");
if (property != null && property.length() > 0) {
try {
this.setFilters(property);
} catch (SQLException e) {
LOG.error("setFilters error", e);
}
}
}
{
String property = properties.getProperty(Constants.DRUID_TIME_BETWEEN_LOG_STATS_MILLIS);
if (property != null && property.length() > 0) {
try {
long value = Long.parseLong(property);
this.setTimeBetweenLogStatsMillis(value);
} catch (NumberFormatException e) {
LOG.error("illegal property '" + Constants.DRUID_TIME_BETWEEN_LOG_STATS_MILLIS + "'", e);
}
}
}
{
String property = properties.getProperty(Constants.DRUID_STAT_SQL_MAX_SIZE);
if (property != null && property.length() > 0) {
try {
int value = Integer.parseInt(property);
if (dataSourceStat != null) {
dataSourceStat.setMaxSqlSize(value);
}
} catch (NumberFormatException e) {
LOG.error("illegal property '" + Constants.DRUID_STAT_SQL_MAX_SIZE + "'", e);
}
}
}
{
Boolean value = getBoolean(properties, "druid.clearFiltersEnable");
if (value != null) {
this.setClearFiltersEnable(value);
}
}
{
Boolean value = getBoolean(properties, "druid.resetStatEnable");
if (value != null) {
this.setResetStatEnable(value);
}
}
{
String property = properties.getProperty("druid.notFullTimeoutRetryCount");
if (property != null && property.length() > 0) {
try {
int value = Integer.parseInt(property);
this.setNotFullTimeoutRetryCount(value);
} catch (NumberFormatException e) {
LOG.error("illegal property 'druid.notFullTimeoutRetryCount'", e);
}
}
}
{
String property = properties.getProperty("druid.timeBetweenEvictionRunsMillis");
if (property != null && property.length() > 0) {
try {
long value = Long.parseLong(property);
this.setTimeBetweenEvictionRunsMillis(value);
} catch (NumberFormatException e) {
LOG.error("illegal property 'druid.timeBetweenEvictionRunsMillis'", e);
}
}
}
{
String property = properties.getProperty("druid.maxWaitThreadCount");
if (property != null && property.length() > 0) {
try {
int value = Integer.parseInt(property);
this.setMaxWaitThreadCount(value);
} catch (NumberFormatException e) {
LOG.error("illegal property 'druid.maxWaitThreadCount'", e);
}
}
}
{
String property = properties.getProperty("druid.maxWait");
if (property != null && property.length() > 0) {
try {
int value = Integer.parseInt(property);
this.setMaxWait(value);
} catch (NumberFormatException e) {
LOG.error("illegal property 'druid.maxWait'", e);
}
}
}
{
Boolean value = getBoolean(properties, "druid.failFast");
if (value != null) {
this.setFailFast(value);
}
}
{
String property = properties.getProperty("druid.phyTimeoutMillis");
if (property != null && property.length() > 0) {
try {
long value = Long.parseLong(property);
this.setPhyTimeoutMillis(value);
} catch (NumberFormatException e) {
LOG.error("illegal property 'druid.phyTimeoutMillis'", e);
}
}
}
{
String property = properties.getProperty("druid.phyMaxUseCount");
if (property != null && property.length() > 0) {
try {
long value = Long.parseLong(property);
this.setPhyMaxUseCount(value);
} catch (NumberFormatException e) {
LOG.error("illegal property 'druid.phyMaxUseCount'", e);
}
}
}
{
String property = properties.getProperty("druid.minEvictableIdleTimeMillis");
if (property != null && property.length() > 0) {
try {
long value = Long.parseLong(property);
this.setMinEvictableIdleTimeMillis(value);
} catch (NumberFormatException e) {
LOG.error("illegal property 'druid.minEvictableIdleTimeMillis'", e);
}
}
}
{
String property = properties.getProperty("druid.maxEvictableIdleTimeMillis");
if (property != null && property.length() > 0) {
try {
long value = Long.parseLong(property);
this.setMaxEvictableIdleTimeMillis(value);
} catch (NumberFormatException e) {
LOG.error("illegal property 'druid.maxEvictableIdleTimeMillis'", e);
}
}
}
{
Boolean value = getBoolean(properties, "druid.keepAlive");
if (value != null) {
this.setKeepAlive(value);
}
}
{
String property = properties.getProperty("druid.keepAliveBetweenTimeMillis");
if (property != null && property.length() > 0) {
try {
long value = Long.parseLong(property);
this.setKeepAliveBetweenTimeMillis(value);
} catch (NumberFormatException e) {
LOG.error("illegal property 'druid.keepAliveBetweenTimeMillis'", e);
}
}
}
{
Boolean value = getBoolean(properties, "druid.poolPreparedStatements");
if (value != null) {
this.setPoolPreparedStatements0(value);
}
}
{
Boolean value = getBoolean(properties, "druid.initVariants");
if (value != null) {
this.setInitVariants(value);
}
}
{
Boolean value = getBoolean(properties, "druid.initGlobalVariants");
if (value != null) {
this.setInitGlobalVariants(value);
}
}
{
Boolean value = getBoolean(properties, "druid.useUnfairLock");
if (value != null) {
this.setUseUnfairLock(value);
}
}
{
String property = properties.getProperty("druid.driverClassName");
if (property != null) {
this.setDriverClassName(property);
}
}
{
String property = properties.getProperty("druid.initialSize");
if (property != null && property.length() > 0) {
try {
int value = Integer.parseInt(property);
this.setInitialSize(value);
} catch (NumberFormatException e) {
LOG.error("illegal property 'druid.initialSize'", e);
}
}
}
{
String property = properties.getProperty("druid.minIdle");
if (property != null && property.length() > 0) {
try {
int value = Integer.parseInt(property);
this.setMinIdle(value);
} catch (NumberFormatException e) {
LOG.error("illegal property 'druid.minIdle'", e);
}
}
}
{
String property = properties.getProperty("druid.maxActive");
if (property != null && property.length() > 0) {
try {
int value = Integer.parseInt(property);
this.setMaxActive(value);
} catch (NumberFormatException e) {
LOG.error("illegal property 'druid.maxActive'", e);
}
}
}
{
Boolean value = getBoolean(properties, "druid.killWhenSocketReadTimeout");
if (value != null) {
setKillWhenSocketReadTimeout(value);
}
}
{
String property = properties.getProperty("druid.connectProperties");
if (property != null) {
this.setConnectionProperties(property);
}
}
{
String property = properties.getProperty("druid.maxPoolPreparedStatementPerConnectionSize");
if (property != null && property.length() > 0) {
try {
int value = Integer.parseInt(property);
this.setMaxPoolPreparedStatementPerConnectionSize(value);
} catch (NumberFormatException e) {
LOG.error("illegal property 'druid.maxPoolPreparedStatementPerConnectionSize'", e);
}
}
}
{
String property = properties.getProperty("druid.initConnectionSqls");
if (property != null && property.length() > 0) {
try {
StringTokenizer tokenizer = new StringTokenizer(property, ";");
setConnectionInitSqls(Collections.list(tokenizer));
} catch (NumberFormatException e) {
LOG.error("illegal property 'druid.initConnectionSqls'", e);
}
}
}
{
String property = System.getProperty("druid.load.spifilter.skip");
if (property != null && !"false".equals(property)) {
loadSpifilterSkip = true;
}
}
}
public boolean isKillWhenSocketReadTimeout() {
return killWhenSocketReadTimeout;
}
public void setKillWhenSocketReadTimeout(boolean killWhenSocketTimeOut) {
this.killWhenSocketReadTimeout = killWhenSocketTimeOut;
}
public boolean isUseGlobalDataSourceStat() {
return useGlobalDataSourceStat;
}
public void setUseGlobalDataSourceStat(boolean useGlobalDataSourceStat) {
this.useGlobalDataSourceStat = useGlobalDataSourceStat;
}
public boolean isKeepAlive() {
return keepAlive;
}
public void setKeepAlive(boolean keepAlive) {
this.keepAlive = keepAlive;
}
public String getInitStackTrace() {
return initStackTrace;
}
public boolean isResetStatEnable() {
return resetStatEnable;
}
public void setResetStatEnable(boolean resetStatEnable) {
this.resetStatEnable = resetStatEnable;
if (dataSourceStat != null) {
dataSourceStat.setResetStatEnable(resetStatEnable);
}
}
public long getDiscardCount() {
return discardCount;
}
public void restart() throws SQLException {
lock.lock();
try {
if (activeCount > 0) {
throw new SQLException("can not restart, activeCount not zero. " + activeCount);
}
if (LOG.isInfoEnabled()) {
LOG.info("{dataSource-" + this.getID() + "} restart");
}
this.close();
this.resetStat();
this.inited = false;
this.enable = true;
this.closed = false;
} finally {
lock.unlock();
}
}
public void resetStat() {
if (!isResetStatEnable()) {
return;
}
lock.lock();
try {
connectCount = 0;
closeCount = 0;
discardCount = 0;
recycleCount = 0;
createCount = 0L;
directCreateCount = 0;
destroyCount = 0L;
removeAbandonedCount = 0;
notEmptyWaitCount = 0;
notEmptySignalCount = 0L;
notEmptyWaitNanos = 0;
activePeak = activeCount;
activePeakTime = 0;
poolingPeak = 0;
createTimespan = 0;
lastError = null;
lastErrorTimeMillis = 0;
lastCreateError = null;
lastCreateErrorTimeMillis = 0;
} finally {
lock.unlock();
}
connectErrorCountUpdater.set(this, 0);
errorCountUpdater.set(this, 0);
commitCountUpdater.set(this, 0);
rollbackCountUpdater.set(this, 0);
startTransactionCountUpdater.set(this, 0);
cachedPreparedStatementHitCountUpdater.set(this, 0);
closedPreparedStatementCountUpdater.set(this, 0);
preparedStatementCountUpdater.set(this, 0);
transactionHistogram.reset();
cachedPreparedStatementDeleteCountUpdater.set(this, 0);
recycleErrorCountUpdater.set(this, 0);
resetCountUpdater.incrementAndGet(this);
}
public long getResetCount() {
return this.resetCount;
}
public boolean isEnable() {
return enable;
}
public void setEnable(boolean enable) {
lock.lock();
try {
this.enable = enable;
if (!enable) {
notEmpty.signalAll();
notEmptySignalCount++;
}
} finally {
lock.unlock();
}
}
public void setPoolPreparedStatements(boolean value) {
setPoolPreparedStatements0(value);
}
private void setPoolPreparedStatements0(boolean value) {
if (this.poolPreparedStatements == value) {
return;
}
this.poolPreparedStatements = value;
if (!inited) {
return;
}
if (LOG.isInfoEnabled()) {
LOG.info("set poolPreparedStatements " + this.poolPreparedStatements + " -> " + value);
}
if (!value) {
lock.lock();
try {
for (int i = 0; i < poolingCount; ++i) {
DruidConnectionHolder connection = connections[i];
for (PreparedStatementHolder holder : connection.getStatementPool().getMap().values()) {
closePreapredStatement(holder);
}
connection.getStatementPool().getMap().clear();
}
} finally {
lock.unlock();
}
}
}
public void setMaxActive(int maxActive) {
if (this.maxActive == maxActive) {
return;
}
if (maxActive == 0) {
throw new IllegalArgumentException("maxActive can't not set zero");
}
if (!inited) {
this.maxActive = maxActive;
return;
}
if (maxActive < this.minIdle) {
throw new IllegalArgumentException("maxActive less than minIdle, " + maxActive + " < " + this.minIdle);
}
if (LOG.isInfoEnabled()) {
LOG.info("maxActive changed : " + this.maxActive + " -> " + maxActive);
}
lock.lock();
try {
int allCount = this.poolingCount + this.activeCount;
if (maxActive > allCount) {
this.connections = Arrays.copyOf(this.connections, maxActive);
evictConnections = new DruidConnectionHolder[maxActive];
keepAliveConnections = new DruidConnectionHolder[maxActive];
} else {
this.connections = Arrays.copyOf(this.connections, allCount);
evictConnections = new DruidConnectionHolder[allCount];
keepAliveConnections = new DruidConnectionHolder[allCount];
}
this.maxActive = maxActive;
} finally {
lock.unlock();
}
}
@SuppressWarnings("rawtypes")
public void setConnectProperties(Properties properties) {
if (properties == null) {
properties = new Properties();
}
boolean equals;
if (properties.size() == this.connectProperties.size()) {
equals = true;
for (Map.Entry entry : properties.entrySet()) {
Object value = this.connectProperties.get(entry.getKey());
Object entryValue = entry.getValue();
if (value == null && entryValue != null) {
equals = false;
break;
}
if (!value.equals(entry.getValue())) {
equals = false;
break;
}
}
} else {
equals = false;
}
if (!equals) {
if (inited && LOG.isInfoEnabled()) {
LOG.info("connectProperties changed : " + this.connectProperties + " -> " + properties);
}
configFromPropety(properties);
for (Filter filter : this.filters) {
filter.configFromProperties(properties);
}
if (exceptionSorter != null) {
exceptionSorter.configFromProperties(properties);
}
if (validConnectionChecker != null) {
validConnectionChecker.configFromProperties(properties);
}
if (statLogger != null) {
statLogger.configFromProperties(properties);
}
}
this.connectProperties = properties;
}
public void init() throws SQLException {
if (inited) {
return;
}
// bug fixed for dead lock, for issue #2980
DruidDriver.getInstance();
final ReentrantLock lock = this.lock;
try {
lock.lockInterruptibly();
} catch (InterruptedException e) {
throw new SQLException("interrupt", e);
}
boolean init = false;
try {
if (inited) {
return;
}
initStackTrace = Utils.toString(Thread.currentThread().getStackTrace());
this.id = DruidDriver.createDataSourceId();
if (this.id > 1) {
long delta = (this.id - 1) * 100000;
this.connectionIdSeedUpdater.addAndGet(this, delta);
this.statementIdSeedUpdater.addAndGet(this, delta);
this.resultSetIdSeedUpdater.addAndGet(this, delta);
this.transactionIdSeedUpdater.addAndGet(this, delta);
}
if (this.jdbcUrl != null) {
this.jdbcUrl = this.jdbcUrl.trim();
initFromWrapDriverUrl();
}
for (Filter filter : filters) {
filter.init(this);
}
if (this.dbType == null || this.dbType.length() == 0) {
this.dbType = JdbcUtils.getDbType(jdbcUrl, null);
}
if (JdbcConstants.MYSQL.equals(this.dbType)
|| JdbcConstants.MARIADB.equals(this.dbType)
|| JdbcConstants.ALIYUN_ADS.equals(this.dbType)) {
boolean cacheServerConfigurationSet = false;
if (this.connectProperties.containsKey("cacheServerConfiguration")) {
cacheServerConfigurationSet = true;
} else if (this.jdbcUrl.indexOf("cacheServerConfiguration") != -1) {
cacheServerConfigurationSet = true;
}
if (cacheServerConfigurationSet) {
this.connectProperties.put("cacheServerConfiguration", "true");
}
}
if (maxActive <= 0) {
throw new IllegalArgumentException("illegal maxActive " + maxActive);
}
if (maxActive < minIdle) {
throw new IllegalArgumentException("illegal maxActive " + maxActive);
}
if (getInitialSize() > maxActive) {
throw new IllegalArgumentException("illegal initialSize " + this.initialSize + ", maxActive " + maxActive);
}
if (timeBetweenLogStatsMillis > 0 && useGlobalDataSourceStat) {
throw new IllegalArgumentException("timeBetweenLogStatsMillis not support useGlobalDataSourceStat=true");
}
if (maxEvictableIdleTimeMillis < minEvictableIdleTimeMillis) {
throw new SQLException("maxEvictableIdleTimeMillis must be grater than minEvictableIdleTimeMillis");
}
if (this.driverClass != null) {
this.driverClass = driverClass.trim();
}
initFromSPIServiceLoader();
if (this.driver == null) {
if (this.driverClass == null || this.driverClass.isEmpty()) {
this.driverClass = JdbcUtils.getDriverClassName(this.jdbcUrl);
}
if (MockDriver.class.getName().equals(driverClass)) {
driver = MockDriver.instance;
} else {
if (jdbcUrl == null && (driverClass == null || driverClass.length() == 0)) {
throw new SQLException("url not set");
}
driver = JdbcUtils.createDriver(driverClassLoader, driverClass);
}
} else {
if (this.driverClass == null) {
this.driverClass = driver.getClass().getName();
}
}
initCheck();
initExceptionSorter();
initValidConnectionChecker();
validationQueryCheck();
if (isUseGlobalDataSourceStat()) {
dataSourceStat = JdbcDataSourceStat.getGlobal();
if (dataSourceStat == null) {
dataSourceStat = new JdbcDataSourceStat("Global", "Global", this.dbType);
JdbcDataSourceStat.setGlobal(dataSourceStat);
}
if (dataSourceStat.getDbType() == null) {
dataSourceStat.setDbType(this.dbType);
}
} else {
dataSourceStat = new JdbcDataSourceStat(this.name, this.jdbcUrl, this.dbType, this.connectProperties);
}
dataSourceStat.setResetStatEnable(this.resetStatEnable);
connections = new DruidConnectionHolder[maxActive];
evictConnections = new DruidConnectionHolder[maxActive];
keepAliveConnections = new DruidConnectionHolder[maxActive];
SQLException connectError = null;
if (createScheduler != null && asyncInit) {
for (int i = 0; i < initialSize; ++i) {
createTaskCount++;
CreateConnectionTask task = new CreateConnectionTask(true);
this.createSchedulerFuture = createScheduler.submit(task);
}
} else if (!asyncInit) {
// init connections
while (poolingCount < initialSize) {
try {
PhysicalConnectionInfo pyConnectInfo = createPhysicalConnection();
DruidConnectionHolder holder = new DruidConnectionHolder(this, pyConnectInfo);
connections[poolingCount++] = holder;
} catch (SQLException ex) {
LOG.error("init datasource error, url: " + this.getUrl(), ex);
if (initExceptionThrow) {
connectError = ex;
break;
} else {
Thread.sleep(3000);
}
}
}
if (poolingCount > 0) {
poolingPeak = poolingCount;
poolingPeakTime = System.currentTimeMillis();
}
}
createAndLogThread();
createAndStartCreatorThread();
createAndStartDestroyThread();
initedLatch.await();
init = true;
initedTime = new Date();
registerMbean();
if (connectError != null && poolingCount == 0) {
throw connectError;
}
if (keepAlive) {
// async fill to minIdle
if (createScheduler != null) {
for (int i = 0; i < minIdle; ++i) {
createTaskCount++;
CreateConnectionTask task = new CreateConnectionTask(true);
this.createSchedulerFuture = createScheduler.submit(task);
}
} else {
this.emptySignal();
}
}
} catch (SQLException e) {
LOG.error("{dataSource-" + this.getID() + "} init error", e);
throw e;
} catch (InterruptedException e) {
throw new SQLException(e.getMessage(), e);
} catch (RuntimeException e){
LOG.error("{dataSource-" + this.getID() + "} init error", e);
throw e;
} catch (Error e){
LOG.error("{dataSource-" + this.getID() + "} init error", e);
throw e;
} finally {
inited = true;
lock.unlock();
if (init && LOG.isInfoEnabled()) {
String msg = "{dataSource-" + this.getID();
if (this.name != null && !this.name.isEmpty()) {
msg += ",";
msg += this.name;
}
msg += "} inited";
LOG.info(msg);
}
}
}
private void createAndLogThread() {
if (this.timeBetweenLogStatsMillis <= 0) {
return;
}
String threadName = "Druid-ConnectionPool-Log-" + System.identityHashCode(this);
logStatsThread = new LogStatsThread(threadName);
logStatsThread.start();
this.resetStatEnable = false;
}
protected void createAndStartDestroyThread() {
destroyTask = new DestroyTask();
if (destroyScheduler != null) {
long period = timeBetweenEvictionRunsMillis;
if (period <= 0) {
period = 1000;
}
destroySchedulerFuture = destroyScheduler.scheduleAtFixedRate(destroyTask, period, period,
TimeUnit.MILLISECONDS);
initedLatch.countDown();
return;
}
String threadName = "Druid-ConnectionPool-Destroy-" + System.identityHashCode(this);
destroyConnectionThread = new DestroyConnectionThread(threadName);
destroyConnectionThread.start();
}
protected void createAndStartCreatorThread() {
if (createScheduler == null) {
String threadName = "Druid-ConnectionPool-Create-" + System.identityHashCode(this);
createConnectionThread = new CreateConnectionThread(threadName);
createConnectionThread.start();
return;
}
initedLatch.countDown();
}
/**
* load filters from SPI ServiceLoader
*
* @see ServiceLoader
*/
private void initFromSPIServiceLoader() {
if (loadSpifilterSkip) {
return;
}
if (autoFilters == null) {
List<Filter> filters = new ArrayList<Filter>();
ServiceLoader<Filter> autoFilterLoader = ServiceLoader.load(Filter.class);
for (Filter filter : autoFilterLoader) {
AutoLoad autoLoad = filter.getClass().getAnnotation(AutoLoad.class);
if (autoLoad != null && autoLoad.value()) {
filters.add(filter);
}
}
autoFilters = filters;
}
for (Filter filter : autoFilters) {
if (LOG.isInfoEnabled()) {
LOG.info("load filter from spi :" + filter.getClass().getName());
}
addFilter(filter);
}
}
private void initFromWrapDriverUrl() throws SQLException {
if (!jdbcUrl.startsWith(DruidDriver.DEFAULT_PREFIX)) {
return;
}
DataSourceProxyConfig config = DruidDriver.parseConfig(jdbcUrl, null);
this.driverClass = config.getRawDriverClassName();
LOG.error("error url : '" + jdbcUrl + "', it should be : '" + config.getRawUrl() + "'");
this.jdbcUrl = config.getRawUrl();
if (this.name == null) {
this.name = config.getName();
}
for (Filter filter : config.getFilters()) {
addFilter(filter);
}
}
/**
* 会去重复
*
* @param filter
*/
private void addFilter(Filter filter) {
boolean exists = false;
for (Filter initedFilter : this.filters) {
if (initedFilter.getClass() == filter.getClass()) {
exists = true;
break;
}
}
if (!exists) {
filter.init(this);
this.filters.add(filter);
}
}
private void validationQueryCheck() {
if (!(testOnBorrow || testOnReturn || testWhileIdle)) {
return;
}
if (this.validConnectionChecker != null) {
return;
}
if (this.validationQuery != null && this.validationQuery.length() > 0) {
return;
}
String errorMessage = "";
if (testOnBorrow) {
errorMessage += "testOnBorrow is true, ";
}
if (testOnReturn) {
errorMessage += "testOnReturn is true, ";
}
if (testWhileIdle) {
errorMessage += "testWhileIdle is true, ";
}
LOG.error(errorMessage + "validationQuery not set");
}
protected void initCheck() throws SQLException {
if (JdbcUtils.ORACLE.equals(this.dbType)) {
isOracle = true;
if (driver.getMajorVersion() < 10) {
throw new SQLException("not support oracle driver " + driver.getMajorVersion() + "."
+ driver.getMinorVersion());
}
if (driver.getMajorVersion() == 10 && isUseOracleImplicitCache()) {
this.getConnectProperties().setProperty("oracle.jdbc.FreeMemoryOnEnterImplicitCache", "true");
}
oracleValidationQueryCheck();
} else if (JdbcUtils.DB2.equals(dbType)) {
db2ValidationQueryCheck();
} else if (JdbcUtils.MYSQL.equals(this.dbType)
|| JdbcUtils.MYSQL_DRIVER_6.equals(this.dbType)) {
isMySql = true;
}
if (removeAbandoned) {
LOG.warn("removeAbandoned is true, not use in productiion.");
}
}
private void oracleValidationQueryCheck() {
if (validationQuery == null) {
return;
}
if (validationQuery.length() == 0) {
return;
}
SQLStatementParser sqlStmtParser = SQLParserUtils.createSQLStatementParser(validationQuery, this.dbType);
List<SQLStatement> stmtList = sqlStmtParser.parseStatementList();
if (stmtList.size() != 1) {
return;
}
SQLStatement stmt = stmtList.get(0);
if (!(stmt instanceof SQLSelectStatement)) {
return;
}
SQLSelectQuery query = ((SQLSelectStatement) stmt).getSelect().getQuery();
if (query instanceof SQLSelectQueryBlock) {
if (((SQLSelectQueryBlock) query).getFrom() == null) {
LOG.error("invalid oracle validationQuery. " + validationQuery + ", may should be : " + validationQuery
+ " FROM DUAL");
}
}
}
private void db2ValidationQueryCheck() {
if (validationQuery == null) {
return;
}
if (validationQuery.length() == 0) {
return;
}
SQLStatementParser sqlStmtParser = SQLParserUtils.createSQLStatementParser(validationQuery, this.dbType);
List<SQLStatement> stmtList = sqlStmtParser.parseStatementList();
if (stmtList.size() != 1) {
return;
}
SQLStatement stmt = stmtList.get(0);
if (!(stmt instanceof SQLSelectStatement)) {
return;
}
SQLSelectQuery query = ((SQLSelectStatement) stmt).getSelect().getQuery();
if (query instanceof SQLSelectQueryBlock) {
if (((SQLSelectQueryBlock) query).getFrom() == null) {
LOG.error("invalid db2 validationQuery. " + validationQuery + ", may should be : " + validationQuery
+ " FROM SYSDUMMY");
}
}
}
private void initValidConnectionChecker() {
if (this.validConnectionChecker != null) {
return;
}
String realDriverClassName = driver.getClass().getName();
if (JdbcUtils.isMySqlDriver(realDriverClassName)) {
this.validConnectionChecker = new MySqlValidConnectionChecker();
} else if (realDriverClassName.equals(JdbcConstants.ORACLE_DRIVER)
|| realDriverClassName.equals(JdbcConstants.ORACLE_DRIVER2)) {
this.validConnectionChecker = new OracleValidConnectionChecker();
} else if (realDriverClassName.equals(JdbcConstants.SQL_SERVER_DRIVER)
|| realDriverClassName.equals(JdbcConstants.SQL_SERVER_DRIVER_SQLJDBC4)
|| realDriverClassName.equals(JdbcConstants.SQL_SERVER_DRIVER_JTDS)) {
this.validConnectionChecker = new MSSQLValidConnectionChecker();
} else if (realDriverClassName.equals(JdbcConstants.POSTGRESQL_DRIVER)
|| realDriverClassName.equals(JdbcConstants.ENTERPRISEDB_DRIVER)) {
this.validConnectionChecker = new PGValidConnectionChecker();
}
}
private void initExceptionSorter() {
if (exceptionSorter instanceof NullExceptionSorter) {
if (driver instanceof MockDriver) {
return;
}
} else if (this.exceptionSorter != null) {
return;
}
for (Class<?> driverClass = driver.getClass();;) {
String realDriverClassName = driverClass.getName();
if (realDriverClassName.equals(JdbcConstants.MYSQL_DRIVER) //
|| realDriverClassName.equals(JdbcConstants.MYSQL_DRIVER_6)) {
this.exceptionSorter = new MySqlExceptionSorter();
this.isMySql = true;
} else if (realDriverClassName.equals(JdbcConstants.ORACLE_DRIVER)
|| realDriverClassName.equals(JdbcConstants.ORACLE_DRIVER2)) {
this.exceptionSorter = new OracleExceptionSorter();
} else if (realDriverClassName.equals("com.informix.jdbc.IfxDriver")) {
this.exceptionSorter = new InformixExceptionSorter();
} else if (realDriverClassName.equals("com.sybase.jdbc2.jdbc.SybDriver")) {
this.exceptionSorter = new SybaseExceptionSorter();
} else if (realDriverClassName.equals(JdbcConstants.POSTGRESQL_DRIVER)
|| realDriverClassName.equals(JdbcConstants.ENTERPRISEDB_DRIVER)) {
this.exceptionSorter = new PGExceptionSorter();
} else if (realDriverClassName.equals("com.alibaba.druid.mock.MockDriver")) {
this.exceptionSorter = new MockExceptionSorter();
} else if (realDriverClassName.contains("DB2")) {
this.exceptionSorter = new DB2ExceptionSorter();
} else {
Class<?> superClass = driverClass.getSuperclass();
if (superClass != null && superClass != Object.class) {
driverClass = superClass;
continue;
}
}
break;
}
}
@Override
public DruidPooledConnection getConnection() throws SQLException {
return getConnection(maxWait);
}
public DruidPooledConnection getConnection(long maxWaitMillis) throws SQLException {
init();
if (filters.size() > 0) {
FilterChainImpl filterChain = new FilterChainImpl(this);
return filterChain.dataSource_connect(this, maxWaitMillis);
} else {
return getConnectionDirect(maxWaitMillis);
}
}
@Override
public PooledConnection getPooledConnection() throws SQLException {
return getConnection(maxWait);
}
@Override
public PooledConnection getPooledConnection(String user, String password) throws SQLException {
throw new UnsupportedOperationException("Not supported by DruidDataSource");
}
public DruidPooledConnection getConnectionDirect(long maxWaitMillis) throws SQLException {
int notFullTimeoutRetryCnt = 0;
for (;;) {
// handle notFullTimeoutRetry
DruidPooledConnection poolableConnection;
try {
poolableConnection = getConnectionInternal(maxWaitMillis);
} catch (GetConnectionTimeoutException ex) {
if (notFullTimeoutRetryCnt <= this.notFullTimeoutRetryCount && !isFull()) {
notFullTimeoutRetryCnt++;
if (LOG.isWarnEnabled()) {
LOG.warn("get connection timeout retry : " + notFullTimeoutRetryCnt);
}
continue;
}
throw ex;
}
if (testOnBorrow) {
boolean validate = testConnectionInternal(poolableConnection.holder, poolableConnection.conn);
if (!validate) {
if (LOG.isDebugEnabled()) {
LOG.debug("skip not validate connection.");
}
Connection realConnection = poolableConnection.conn;
discardConnection(realConnection);
continue;
}
} else {
Connection realConnection = poolableConnection.conn;
if (poolableConnection.conn.isClosed()) {
discardConnection(null); // 传入null，避免重复关闭
continue;
}
if (testWhileIdle) {
final DruidConnectionHolder holder = poolableConnection.holder;
long currentTimeMillis = System.currentTimeMillis();
long lastActiveTimeMillis = holder.lastActiveTimeMillis;
long lastKeepTimeMillis = holder.lastKeepTimeMillis;
if (lastKeepTimeMillis > lastActiveTimeMillis) {
lastActiveTimeMillis = lastKeepTimeMillis;
}
long idleMillis = currentTimeMillis - lastActiveTimeMillis;
long timeBetweenEvictionRunsMillis = this.timeBetweenEvictionRunsMillis;
if (timeBetweenEvictionRunsMillis <= 0) {
timeBetweenEvictionRunsMillis = DEFAULT_TIME_BETWEEN_EVICTION_RUNS_MILLIS;
}
if (idleMillis >= timeBetweenEvictionRunsMillis
|| idleMillis < 0 // unexcepted branch
) {
boolean validate = testConnectionInternal(poolableConnection.holder, poolableConnection.conn);
if (!validate) {
if (LOG.isDebugEnabled()) {
LOG.debug("skip not validate connection.");
}
discardConnection(realConnection);
continue;
}
}
}
}
if (removeAbandoned) {
StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();
poolableConnection.connectStackTrace = stackTrace;
poolableConnection.setConnectedTimeNano();
poolableConnection.traceEnable = true;
activeConnectionLock.lock();
try {
activeConnections.put(poolableConnection, PRESENT);
} finally {
activeConnectionLock.unlock();
}
}
if (!this.defaultAutoCommit) {
poolableConnection.setAutoCommit(false);
}
return poolableConnection;
}
}
/**
* 抛弃连接，不进行回收，而是抛弃
*
* @param realConnection
*/
public void discardConnection(Connection realConnection) {
JdbcUtils.close(realConnection);
lock.lock();
try {
activeCount--;
discardCount++;
if (activeCount <= minIdle) {
emptySignal();
}
} finally {
lock.unlock();
}
}
private DruidPooledConnection getConnectionInternal(long maxWait) throws SQLException {
if (closed) {
connectErrorCountUpdater.incrementAndGet(this);
throw new DataSourceClosedException("dataSource already closed at " + new Date(closeTimeMillis));
}
if (!enable) {
connectErrorCountUpdater.incrementAndGet(this);
throw new DataSourceDisableException();
}
final long nanos = TimeUnit.MILLISECONDS.toNanos(maxWait);
final int maxWaitThreadCount = this.maxWaitThreadCount;
DruidConnectionHolder holder;
for (boolean createDirect = false;;) {
if (createDirect) {
createStartNanosUpdater.set(this, System.nanoTime());
if (creatingCountUpdater.compareAndSet(this, 0, 1)) {
PhysicalConnectionInfo pyConnInfo = DruidDataSource.this.createPhysicalConnection();
holder = new DruidConnectionHolder(this, pyConnInfo);
holder.lastActiveTimeMillis = System.currentTimeMillis();
creatingCountUpdater.decrementAndGet(this);
directCreateCountUpdater.incrementAndGet(this);
if (LOG.isDebugEnabled()) {
LOG.debug("conn-direct_create ");
}
boolean discard = false;
lock.lock();
try {
if (activeCount < maxActive) {
activeCount++;
if (activeCount > activePeak) {
activePeak = activeCount;
activePeakTime = System.currentTimeMillis();
}
break;
} else {
discard = true;
}
} finally {
lock.unlock();
}
if (discard) {
JdbcUtils.close(pyConnInfo.getPhysicalConnection());
}
}
}
try {
lock.lockInterruptibly();
} catch (InterruptedException e) {
connectErrorCountUpdater.incrementAndGet(this);
throw new SQLException("interrupt", e);
}
try {
if (maxWaitThreadCount > 0
&& notEmptyWaitThreadCount >= maxWaitThreadCount) {
connectErrorCountUpdater.incrementAndGet(this);
throw new SQLException("maxWaitThreadCount " + maxWaitThreadCount + ", current wait Thread count "
+ lock.getQueueLength());
}
if (onFatalError
&& onFatalErrorMaxActive > 0
&& activeCount >= onFatalErrorMaxActive) {
connectErrorCountUpdater.incrementAndGet(this);
StringBuilder errorMsg = new StringBuilder();
errorMsg.append("onFatalError, activeCount ")
.append(activeCount)
.append(", onFatalErrorMaxActive ")
.append(onFatalErrorMaxActive);
if (lastFatalErrorTimeMillis > 0) {
errorMsg.append(", time '")
.append(StringUtils.formatDateTime19(
lastFatalErrorTimeMillis, TimeZone.getDefault()))
.append("'");
}
if (lastFatalErrorSql != null) {
errorMsg.append(", sql n")
.append(lastFatalErrorSql);
}
throw new SQLException(
errorMsg.toString(), lastFatalError);
}
connectCount++;
if (createScheduler != null
&& poolingCount == 0
&& activeCount < maxActive
&& creatingCountUpdater.get(this) == 0
&& createScheduler instanceof ScheduledThreadPoolExecutor) {
ScheduledThreadPoolExecutor executor = (ScheduledThreadPoolExecutor) createScheduler;
if (executor.getQueue().size() > 0) {
createDirect = true;
continue;
}
}
if (maxWait > 0) {
holder = pollLast(nanos);
} else {
holder = takeLast();
}
if (holder != null) {
activeCount++;
if (activeCount > activePeak) {
activePeak = activeCount;
activePeakTime = System.currentTimeMillis();
}
}
} catch (InterruptedException e) {
connectErrorCountUpdater.incrementAndGet(this);
throw new SQLException(e.getMessage(), e);
} catch (SQLException e) {
connectErrorCountUpdater.incrementAndGet(this);
throw e;
} finally {
lock.unlock();
}
break;
}
if (holder == null) {
long waitNanos = waitNanosLocal.get();
StringBuilder buf = new StringBuilder(128);
buf.append("wait millis ")//
.append(waitNanos / (1000 * 1000))//
.append(", active ").append(activeCount)//
.append(", maxActive ").append(maxActive)//
.append(", creating ").append(creatingCount)//
;
if (creatingCount > 0 && createStartNanos > 0) {
long createElapseMillis = (System.nanoTime() - createStartNanos) / (1000 * 1000);
if (createElapseMillis > 0) {
buf.append(", createElapseMillis ").append(createElapseMillis);
}
}
if (createErrorCount > 0) {
buf.append(", createErrorCount ").append(createErrorCount);
}
List<JdbcSqlStatValue> sqlList = this.getDataSourceStat().getRuningSqlList();
for (int i = 0; i < sqlList.size(); ++i) {
if (i != 0) {
buf.append('n');
} else {
buf.append(", ");
}
JdbcSqlStatValue sql = sqlList.get(i);
buf.append("runningSqlCount ").append(sql.getRunningCount());
buf.append(" : ");
buf.append(sql.getSql());
}
String errorMessage = buf.toString();
if (this.createError != null) {
throw new GetConnectionTimeoutException(errorMessage, createError);
} else {
throw new GetConnectionTimeoutException(errorMessage);
}
}
holder.incrementUseCount();
DruidPooledConnection poolalbeConnection = new DruidPooledConnection(holder);
return poolalbeConnection;
}
public void handleConnectionException(DruidPooledConnection pooledConnection, Throwable t, String sql) throws SQLException {
final DruidConnectionHolder holder = pooledConnection.getConnectionHolder();
errorCountUpdater.incrementAndGet(this);
lastError = t;
lastErrorTimeMillis = System.currentTimeMillis();
if (t instanceof SQLException) {
SQLException sqlEx = (SQLException) t;
// broadcastConnectionError
ConnectionEvent event = new ConnectionEvent(pooledConnection, sqlEx);
for (ConnectionEventListener eventListener : holder.getConnectionEventListeners()) {
eventListener.connectionErrorOccurred(event);
}
// exceptionSorter.isExceptionFatal
if (exceptionSorter != null && exceptionSorter.isExceptionFatal(sqlEx)) {
handleFatalError(pooledConnection, sqlEx, sql);
}
throw sqlEx;
} else {
throw new SQLException("Error", t);
}
}
protected final void handleFatalError(DruidPooledConnection conn, SQLException error, String sql) throws SQLException {
final DruidConnectionHolder holder = conn.holder;
if (conn.isTraceEnable()) {
activeConnectionLock.lock();
try {
if (conn.isTraceEnable()) {
activeConnections.remove(conn);
conn.setTraceEnable(false);
}
} finally {
activeConnectionLock.unlock();
}
}
long lastErrorTimeMillis = this.lastErrorTimeMillis;
if (lastErrorTimeMillis == 0) {
lastErrorTimeMillis = System.currentTimeMillis();
}
if (sql != null && sql.length() > 1024) {
sql = sql.substring(0, 1024);
}
boolean requireDiscard = false;
final ReentrantLock lock = conn.lock;
lock.lock();
try {
if ((!conn.isClosed()) || !conn.isDisable()) {
holder.setDiscard(true);
conn.disable(error);
requireDiscard = true;
}
lastFatalErrorTimeMillis = lastErrorTimeMillis;
onFatalError = true;
lastFatalError = error;
lastFatalErrorSql = sql;
} finally {
lock.unlock();
}
if (requireDiscard) {
if (holder.statementTrace != null) {
holder.lock.lock();
try {
for (Statement stmt : holder.statementTrace) {
JdbcUtils.close(stmt);
}
} finally {
holder.lock.unlock();
}
}
this.discardConnection(holder.getConnection());
holder.setDiscard(true);
}
LOG.error("discard connection", error);
}
/**
* 回收连接
*/
protected void recycle(DruidPooledConnection pooledConnection) throws SQLException {
final DruidConnectionHolder holder = pooledConnection.holder;
if (holder == null) {
LOG.warn("connectionHolder is null");
return;
}
if (logDifferentThread //
&& (!isAsyncCloseConnectionEnable()) //
&& pooledConnection.ownerThread != Thread.currentThread()//
) {
LOG.warn("get/close not same thread");
}
final Connection physicalConnection = holder.conn;
if (pooledConnection.traceEnable) {
Object oldInfo = null;
activeConnectionLock.lock();
try {
if (pooledConnection.traceEnable) {
oldInfo = activeConnections.remove(pooledConnection);
pooledConnection.traceEnable = false;
}
} finally {
activeConnectionLock.unlock();
}
if (oldInfo == null) {
if (LOG.isWarnEnabled()) {
LOG.warn("remove abandonded failed. activeConnections.size " + activeConnections.size());
}
}
}
final boolean isAutoCommit = holder.underlyingAutoCommit;
final boolean isReadOnly = holder.underlyingReadOnly;
final boolean testOnReturn = this.testOnReturn;
try {
// check need to rollback?
if ((!isAutoCommit) && (!isReadOnly)) {
pooledConnection.rollback();
}
// reset holder, restore default settings, clear warnings
boolean isSameThread = pooledConnection.ownerThread == Thread.currentThread();
if (!isSameThread) {
final ReentrantLock lock = pooledConnection.lock;
lock.lock();
try {
holder.reset();
} finally {
lock.unlock();
}
} else {
holder.reset();
}
if (holder.discard) {
return;
}
if (phyMaxUseCount > 0 && holder.useCount >= phyMaxUseCount) {
discardConnection(holder.conn);
return;
}
if (physicalConnection.isClosed()) {
lock.lock();
try {
activeCount--;
closeCount++;
} finally {
lock.unlock();
}
return;
}
if (testOnReturn) {
boolean validate = testConnectionInternal(holder, physicalConnection);
if (!validate) {
JdbcUtils.close(physicalConnection);
destroyCountUpdater.incrementAndGet(this);
lock.lock();
try {
activeCount--;
closeCount++;
} finally {
lock.unlock();
}
return;
}
}
if (!enable) {
discardConnection(holder.conn);
return;
}
boolean result;
final long currentTimeMillis = System.currentTimeMillis();
if (phyTimeoutMillis > 0) {
long phyConnectTimeMillis = currentTimeMillis - holder.connectTimeMillis;
if (phyConnectTimeMillis > phyTimeoutMillis) {
discardConnection(holder.conn);
return;
}
}
lock.lock();
try {
activeCount--;
closeCount++;
result = putLast(holder, currentTimeMillis);
recycleCount++;
} finally {
lock.unlock();
}
if (!result) {
JdbcUtils.close(holder.conn);
LOG.info("connection recyle failed.");
}
} catch (Throwable e) {
holder.clearStatementCache();
if (!holder.discard) {
this.discardConnection(physicalConnection);
holder.discard = true;
}
LOG.error("recyle error", e);
recycleErrorCountUpdater.incrementAndGet(this);
}
}
public long getRecycleErrorCount() {
return recycleErrorCount;
}
public void clearStatementCache() throws SQLException {
lock.lock();
try {
for (int i = 0; i < poolingCount; ++i) {
DruidConnectionHolder conn = connections[i];
if (conn.statementPool != null) {
conn.statementPool.clear();
}
}
} finally {
lock.unlock();
}
}
/**
* close datasource
*/
public void close() {
if (LOG.isInfoEnabled()) {
LOG.info("{dataSource-" + this.getID() + "} closing ...");
}
lock.lock();
try {
if (this.closed) {
return;
}
if (!this.inited) {
return;
}
this.closing = true;
if (logStatsThread != null) {
logStatsThread.interrupt();
}
if (createConnectionThread != null) {
createConnectionThread.interrupt();
}
if (destroyConnectionThread != null) {
destroyConnectionThread.interrupt();
}
if (createSchedulerFuture != null) {
createSchedulerFuture.cancel(true);
}
if (destroySchedulerFuture != null) {
destroySchedulerFuture.cancel(true);
}
for (int i = 0; i < poolingCount; ++i) {
DruidConnectionHolder connHolder = connections[i];
for (PreparedStatementHolder stmtHolder : connHolder.getStatementPool().getMap().values()) {
connHolder.getStatementPool().closeRemovedStatement(stmtHolder);
}
connHolder.getStatementPool().getMap().clear();
Connection physicalConnection = connHolder.getConnection();
try {
physicalConnection.close();
} catch (Exception ex) {
LOG.warn("close connection error", ex);
}
connections[i] = null;
destroyCountUpdater.incrementAndGet(this);
}
poolingCount = 0;
unregisterMbean();
enable = false;
notEmpty.signalAll();
notEmptySignalCount++;
this.closed = true;
this.closeTimeMillis = System.currentTimeMillis();
for (Filter filter : filters) {
filter.destroy();
}
} finally {
lock.unlock();
}
if (LOG.isInfoEnabled()) {
LOG.info("{dataSource-" + this.getID() + "} closed");
}
}
public void registerMbean() {
if (!mbeanRegistered) {
AccessController.doPrivileged(new PrivilegedAction<Object>() {
@Override
public Object run() {
ObjectName objectName = DruidDataSourceStatManager.addDataSource(DruidDataSource.this,
DruidDataSource.this.name);
DruidDataSource.this.setObjectName(objectName);
DruidDataSource.this.mbeanRegistered = true;
return null;
}
});
}
}
public void unregisterMbean() {
if (mbeanRegistered) {
AccessController.doPrivileged(new PrivilegedAction<Object>() {
@Override
public Object run() {
DruidDataSourceStatManager.removeDataSource(DruidDataSource.this);
DruidDataSource.this.mbeanRegistered = false;
return null;
}
});
}
}
public boolean isMbeanRegistered() {
return mbeanRegistered;
}
boolean putLast(DruidConnectionHolder e, long lastActiveTimeMillis) {
if (poolingCount >= maxActive) {
return false;
}
e.lastActiveTimeMillis = lastActiveTimeMillis;
connections[poolingCount] = e;
incrementPoolingCount();
if (poolingCount > poolingPeak) {
poolingPeak = poolingCount;
poolingPeakTime = lastActiveTimeMillis;
}
notEmpty.signal();
notEmptySignalCount++;
return true;
}
DruidConnectionHolder takeLast() throws InterruptedException, SQLException {
try {
while (poolingCount == 0) {
emptySignal(); // send signal to CreateThread create connection
if (failFast && isFailContinuous()) {
throw new DataSourceNotAvailableException(createError);
}
notEmptyWaitThreadCount++;
if (notEmptyWaitThreadCount > notEmptyWaitThreadPeak) {
notEmptyWaitThreadPeak = notEmptyWaitThreadCount;
}
try {
notEmpty.await(); // signal by recycle or creator
} finally {
notEmptyWaitThreadCount--;
}
notEmptyWaitCount++;
if (!enable) {
connectErrorCountUpdater.incrementAndGet(this);
throw new DataSourceDisableException();
}
}
} catch (InterruptedException ie) {
notEmpty.signal(); // propagate to non-interrupted thread
notEmptySignalCount++;
throw ie;
}
decrementPoolingCount();
DruidConnectionHolder last = connections[poolingCount];
connections[poolingCount] = null;
return last;
}
private DruidConnectionHolder pollLast(long nanos) throws InterruptedException, SQLException {
long estimate = nanos;
for (;;) {
if (poolingCount == 0) {
emptySignal(); // send signal to CreateThread create connection
if (failFast && isFailContinuous()) {
throw new DataSourceNotAvailableException(createError);
}
if (estimate <= 0) {
waitNanosLocal.set(nanos - estimate);
return null;
}
notEmptyWaitThreadCount++;
if (notEmptyWaitThreadCount > notEmptyWaitThreadPeak) {
notEmptyWaitThreadPeak = notEmptyWaitThreadCount;
}
try {
long startEstimate = estimate;
estimate = notEmpty.awaitNanos(estimate); // signal by
// recycle or
// creator
notEmptyWaitCount++;
notEmptyWaitNanos += (startEstimate - estimate);
if (!enable) {
connectErrorCountUpdater.incrementAndGet(this);
throw new DataSourceDisableException();
}
} catch (InterruptedException ie) {
notEmpty.signal(); // propagate to non-interrupted thread
notEmptySignalCount++;
throw ie;
} finally {
notEmptyWaitThreadCount--;
}
if (poolingCount == 0) {
if (estimate > 0) {
continue;
}
waitNanosLocal.set(nanos - estimate);
return null;
}
}
decrementPoolingCount();
DruidConnectionHolder last = connections[poolingCount];
connections[poolingCount] = null;
long waitNanos = nanos - estimate;
last.setLastNotEmptyWaitNanos(waitNanos);
return last;
}
}
private final void decrementPoolingCount() {
poolingCount--;
}
private final void incrementPoolingCount() {
poolingCount++;
}
@Override
public Connection getConnection(String username, String password) throws SQLException {
if (this.username == null
&& this.password == null
&& username != null
&& password != null) {
this.username = username;
this.password = password;
return getConnection();
}
if (!StringUtils.equals(username, this.username)) {
throw new UnsupportedOperationException("Not supported by DruidDataSource");
}
if (!StringUtils.equals(password, this.password)) {
throw new UnsupportedOperationException("Not supported by DruidDataSource");
}
return getConnection();
}
public long getCreateCount() {
return createCount;
}
public long getDestroyCount() {
return destroyCount;
}
public long getConnectCount() {
lock.lock();
try {
return connectCount;
} finally {
lock.unlock();
}
}
public long getCloseCount() {
return closeCount;
}
public long getConnectErrorCount() {
return connectErrorCountUpdater.get(this);
}
@Override
public int getPoolingCount() {
lock.lock();
try {
return poolingCount;
} finally {
lock.unlock();
}
}
public int getPoolingPeak() {
lock.lock();
try {
return poolingPeak;
} finally {
lock.unlock();
}
}
public Date getPoolingPeakTime() {
if (poolingPeakTime <= 0) {
return null;
}
return new Date(poolingPeakTime);
}
public long getRecycleCount() {
return recycleCount;
}
public int getActiveCount() {
lock.lock();
try {
return activeCount;
} finally {
lock.unlock();
}
}
public void logStats() {
final DruidDataSourceStatLogger statLogger = this.statLogger;
if (statLogger == null) {
return;
}
DruidDataSourceStatValue statValue = getStatValueAndReset();
statLogger.log(statValue);
}
public DruidDataSourceStatValue getStatValueAndReset() {
DruidDataSourceStatValue value = new DruidDataSourceStatValue();
lock.lock();
try {
value.setPoolingCount(this.poolingCount);
value.setPoolingPeak(this.poolingPeak);
value.setPoolingPeakTime(this.poolingPeakTime);
value.setActiveCount(this.activeCount);
value.setActivePeak(this.activePeak);
value.setActivePeakTime(this.activePeakTime);
value.setConnectCount(this.connectCount);
value.setCloseCount(this.closeCount);
value.setWaitThreadCount(lock.getWaitQueueLength(notEmpty));
value.setNotEmptyWaitCount(this.notEmptyWaitCount);
value.setNotEmptyWaitNanos(this.notEmptyWaitNanos);
value.setKeepAliveCheckCount(this.keepAliveCheckCount);
// reset
this.poolingPeak = 0;
this.poolingPeakTime = 0;
this.activePeak = 0;
this.activePeakTime = 0;
this.connectCount = 0;
this.closeCount = 0;
this.keepAliveCheckCount = 0;
this.notEmptyWaitCount = 0;
this.notEmptyWaitNanos = 0;
} finally {
lock.unlock();
}
value.setName(this.getName());
value.setDbType(this.dbType);
value.setDriverClassName(this.getDriverClassName());
value.setUrl(this.getUrl());
value.setUserName(this.getUsername());
value.setFilterClassNames(this.getFilterClassNames());
value.setInitialSize(this.getInitialSize());
value.setMinIdle(this.getMinIdle());
value.setMaxActive(this.getMaxActive());
value.setQueryTimeout(this.getQueryTimeout());
value.setTransactionQueryTimeout(this.getTransactionQueryTimeout());
value.setLoginTimeout(this.getLoginTimeout());
value.setValidConnectionCheckerClassName(this.getValidConnectionCheckerClassName());
value.setExceptionSorterClassName(this.getExceptionSorterClassName());
value.setTestOnBorrow(this.testOnBorrow);
value.setTestOnReturn(this.testOnReturn);
value.setTestWhileIdle(this.testWhileIdle);
value.setDefaultAutoCommit(this.isDefaultAutoCommit());
if (defaultReadOnly != null) {
value.setDefaultReadOnly(defaultReadOnly);
}
value.setDefaultTransactionIsolation(this.getDefaultTransactionIsolation());
value.setLogicConnectErrorCount(connectErrorCountUpdater.getAndSet(this, 0));
value.setPhysicalConnectCount(createCountUpdater.getAndSet(this, 0));
value.setPhysicalCloseCount(destroyCountUpdater.getAndSet(this, 0));
value.setPhysicalConnectErrorCount(createErrorCountUpdater.getAndSet(this, 0));
value.setExecuteCount(this.getAndResetExecuteCount());
value.setErrorCount(errorCountUpdater.getAndSet(this, 0));
value.setCommitCount(commitCountUpdater.getAndSet(this, 0));
value.setRollbackCount(rollbackCountUpdater.getAndSet(this, 0));
value.setPstmtCacheHitCount(cachedPreparedStatementHitCountUpdater.getAndSet(this,0));
value.setPstmtCacheMissCount(cachedPreparedStatementMissCountUpdater.getAndSet(this, 0));
value.setStartTransactionCount(startTransactionCountUpdater.getAndSet(this, 0));
value.setTransactionHistogram(this.getTransactionHistogram().toArrayAndReset());
value.setConnectionHoldTimeHistogram(this.getDataSourceStat().getConnectionHoldHistogram().toArrayAndReset());
value.setRemoveAbandoned(this.isRemoveAbandoned());
value.setClobOpenCount(this.getDataSourceStat().getClobOpenCountAndReset());
value.setBlobOpenCount(this.getDataSourceStat().getBlobOpenCountAndReset());
value.setSqlSkipCount(this.getDataSourceStat().getSkipSqlCountAndReset());
value.setSqlList(this.getDataSourceStat().getSqlStatMapAndReset());
return value;
}
public long getRemoveAbandonedCount() {
return removeAbandonedCount;
}
protected boolean put(PhysicalConnectionInfo physicalConnectionInfo) {
DruidConnectionHolder holder = null;
try {
holder = new DruidConnectionHolder(DruidDataSource.this, physicalConnectionInfo);
} catch (SQLException ex) {
lock.lock();
try {
if (createScheduler != null) {
createTaskCount--;
}
} finally {
lock.unlock();
}
LOG.error("create connection holder error", ex);
return false;
}
return put(holder);
}
private boolean put(DruidConnectionHolder holder) {
lock.lock();
try {
if (poolingCount >= maxActive) {
return false;
}
connections[poolingCount] = holder;
incrementPoolingCount();
if (poolingCount > poolingPeak) {
poolingPeak = poolingCount;
poolingPeakTime = System.currentTimeMillis();
}
notEmpty.signal();
notEmptySignalCount++;
if (createScheduler != null) {
createTaskCount--;
if (poolingCount + createTaskCount < notEmptyWaitThreadCount //
&& activeCount + poolingCount + createTaskCount < maxActive) {
emptySignal();
}
}
} finally {
lock.unlock();
}
return true;
}
public class CreateConnectionTask implements Runnable {
private int errorCount = 0;
private boolean initTask = false;
public CreateConnectionTask() {
}
public CreateConnectionTask(boolean initTask) {
this.initTask = initTask;
}
@Override
public void run() {
runInternal();
}
private void runInternal() {
for (;;) {
// addLast
lock.lock();
try {
if (closed || closing) {
createTaskCount--;
return;
}
boolean emptyWait = true;
if (createError != null && poolingCount == 0) {
emptyWait = false;
}
if (emptyWait) {
// 必须存在线程等待，才创建连接
if (poolingCount >= notEmptyWaitThreadCount //
&& (!(keepAlive && activeCount + poolingCount < minIdle))
&& (!initTask)
&& !isFailContinuous()
) {
createTaskCount--;
return;
}
// 防止创建超过maxActive数量的连接
if (activeCount + poolingCount >= maxActive) {
createTaskCount--;
return;
}
}
} finally {
lock.unlock();
}
PhysicalConnectionInfo physicalConnection = null;
try {
physicalConnection = createPhysicalConnection();
} catch (OutOfMemoryError e) {
LOG.error("create connection OutOfMemoryError, out memory. ", e);
errorCount++;
if (errorCount > connectionErrorRetryAttempts && timeBetweenConnectErrorMillis > 0) {
// fail over retry attempts
setFailContinuous(true);
if (failFast) {
lock.lock();
try {
notEmpty.signalAll();
} finally {
lock.unlock();
}
}
if (breakAfterAcquireFailure) {
lock.lock();
try {
createTaskCount--;
} finally {
lock.unlock();
}
return;
}
this.errorCount = 0; // reset errorCount
if (closing || closed) {
createTaskCount--;
return;
}
createSchedulerFuture = createScheduler.schedule(this, timeBetweenConnectErrorMillis, TimeUnit.MILLISECONDS);
return;
}
} catch (SQLException e) {
LOG.error("create connection SQLException, url: " + jdbcUrl, e);
errorCount++;
if (errorCount > connectionErrorRetryAttempts && timeBetweenConnectErrorMillis > 0) {
// fail over retry attempts
setFailContinuous(true);
if (failFast) {
lock.lock();
try {
notEmpty.signalAll();
} finally {
lock.unlock();
}
}
if (breakAfterAcquireFailure) {
lock.lock();
try {
createTaskCount--;
} finally {
lock.unlock();
}
return;
}
this.errorCount = 0; // reset errorCount
if (closing || closed) {
createTaskCount--;
return;
}
createSchedulerFuture = createScheduler.schedule(this, timeBetweenConnectErrorMillis, TimeUnit.MILLISECONDS);
return;
}
} catch (RuntimeException e) {
LOG.error("create connection RuntimeException", e);
// unknow fatal exception
setFailContinuous(true);
continue;
} catch (Error e) {
lock.lock();
try {
createTaskCount--;
} finally {
lock.unlock();
}
LOG.error("create connection Error", e);
// unknow fatal exception
setFailContinuous(true);
break;
} catch (Throwable e) {
LOG.error("create connection unexecpted error.", e);
break;
}
if (physicalConnection == null) {
continue;
}
boolean result = put(physicalConnection);
if (!result) {
JdbcUtils.close(physicalConnection.getPhysicalConnection());
LOG.info("put physical connection to pool failed.");
}
break;
}
}
}
public class CreateConnectionThread extends Thread {
public CreateConnectionThread(String name){
super(name);
this.setDaemon(true);
}
public void run() {
initedLatch.countDown();
long lastDiscardCount = 0;
int errorCount = 0;
for (;;) {
// addLast
try {
lock.lockInterruptibly();
} catch (InterruptedException e2) {
break;
}
long discardCount = DruidDataSource.this.discardCount;
boolean discardChanged = discardCount - lastDiscardCount > 0;
lastDiscardCount = discardCount;
try {
boolean emptyWait = true;
if (createError != null
&& poolingCount == 0
&& !discardChanged) {
emptyWait = false;
}
if (emptyWait
&& asyncInit && createCount < initialSize) {
emptyWait = false;
}
if (emptyWait) {
// 必须存在线程等待，才创建连接
if (poolingCount >= notEmptyWaitThreadCount //
&& (!(keepAlive && activeCount + poolingCount < minIdle))
&& !isFailContinuous()
) {
empty.await();
}
// 防止创建超过maxActive数量的连接
if (activeCount + poolingCount >= maxActive) {
empty.await();
continue;
}
}
} catch (InterruptedException e) {
lastCreateError = e;
lastErrorTimeMillis = System.currentTimeMillis();
if (!closing) {
LOG.error("create connection Thread Interrupted, url: " + jdbcUrl, e);
}
break;
} finally {
lock.unlock();
}
PhysicalConnectionInfo connection = null;
try {
connection = createPhysicalConnection();
} catch (SQLException e) {
LOG.error("create connection SQLException, url: " + jdbcUrl + ", errorCode " + e.getErrorCode()
+ ", state " + e.getSQLState(), e);
errorCount++;
if (errorCount > connectionErrorRetryAttempts && timeBetweenConnectErrorMillis > 0) {
// fail over retry attempts
setFailContinuous(true);
if (failFast) {
lock.lock();
try {
notEmpty.signalAll();
} finally {
lock.unlock();
}
}
if (breakAfterAcquireFailure) {
break;
}
try {
Thread.sleep(timeBetweenConnectErrorMillis);
} catch (InterruptedException interruptEx) {
break;
}
}
} catch (RuntimeException e) {
LOG.error("create connection RuntimeException", e);
setFailContinuous(true);
continue;
} catch (Error e) {
LOG.error("create connection Error", e);
setFailContinuous(true);
break;
}
if (connection == null) {
continue;
}
boolean result = put(connection);
if (!result) {
JdbcUtils.close(connection.getPhysicalConnection());
LOG.info("put physical connection to pool failed.");
}
errorCount = 0; // reset errorCount
}
}
}
public class DestroyConnectionThread extends Thread {
public DestroyConnectionThread(String name){
super(name);
this.setDaemon(true);
}
public void run() {
initedLatch.countDown();
for (;;) {
// 从前面开始删除
try {
if (closed) {
break;
}
if (timeBetweenEvictionRunsMillis > 0) {
Thread.sleep(timeBetweenEvictionRunsMillis);
} else {
Thread.sleep(1000); //
}
if (Thread.interrupted()) {
break;
}
destroyTask.run();
} catch (InterruptedException e) {
break;
}
}
}
}
public class DestroyTask implements Runnable {
public DestroyTask() {
}
@Override
public void run() {
shrink(true, keepAlive);
if (isRemoveAbandoned()) {
removeAbandoned();
}
}
}
public class LogStatsThread extends Thread {
public LogStatsThread(String name){
super(name);
this.setDaemon(true);
}
public void run() {
try {
for (;;) {
try {
logStats();
} catch (Exception e) {
LOG.error("logStats error", e);
}
Thread.sleep(timeBetweenLogStatsMillis);
}
} catch (InterruptedException e) {
// skip
}
}
}
public int removeAbandoned() {
int removeCount = 0;
long currrentNanos = System.nanoTime();
List<DruidPooledConnection> abandonedList = new ArrayList<DruidPooledConnection>();
activeConnectionLock.lock();
try {
Iterator<DruidPooledConnection> iter = activeConnections.keySet().iterator();
for (; iter.hasNext();) {
DruidPooledConnection pooledConnection = iter.next();
if (pooledConnection.isRunning()) {
continue;
}
long timeMillis = (currrentNanos - pooledConnection.getConnectedTimeNano()) / (1000 * 1000);
if (timeMillis >= removeAbandonedTimeoutMillis) {
iter.remove();
pooledConnection.setTraceEnable(false);
abandonedList.add(pooledConnection);
}
}
} finally {
activeConnectionLock.unlock();
}
if (abandonedList.size() > 0) {
for (DruidPooledConnection pooledConnection : abandonedList) {
final ReentrantLock lock = pooledConnection.lock;
lock.lock();
try {
if (pooledConnection.isDisable()) {
continue;
}
} finally {
lock.unlock();
}
JdbcUtils.close(pooledConnection);
pooledConnection.abandond();
removeAbandonedCount++;
removeCount++;
if (isLogAbandoned()) {
StringBuilder buf = new StringBuilder();
buf.append("abandon connection, owner thread: ");
buf.append(pooledConnection.getOwnerThread().getName());
buf.append(", connected at : ");
buf.append(pooledConnection.getConnectedTimeMillis());
buf.append(", open stackTracen");
StackTraceElement[] trace = pooledConnection.getConnectStackTrace();
for (int i = 0; i < trace.length; i++) {
buf.append("tat ");
buf.append(trace[i].toString());
buf.append("n");
}
buf.append("ownerThread current state is " + pooledConnection.getOwnerThread().getState()
+ ", current stackTracen");
trace = pooledConnection.getOwnerThread().getStackTrace();
for (int i = 0; i < trace.length; i++) {
buf.append("tat ");
buf.append(trace[i].toString());
buf.append("n");
}
LOG.error(buf.toString());
}
}
}
return removeCount;
}
/** Instance key */
protected String instanceKey = null;
public Reference getReference() throws NamingException {
final String className = getClass().getName();
final String factoryName = className + "Factory"; // XXX: not robust
Reference ref = new Reference(className, factoryName, null);
ref.add(new StringRefAddr("instanceKey", instanceKey));
ref.add(new StringRefAddr("url", this.getUrl()));
ref.add(new StringRefAddr("username", this.getUsername()));
ref.add(new StringRefAddr("password", this.getPassword()));
// TODO ADD OTHER PROPERTIES
return ref;
}
@Override
public List<String> getFilterClassNames() {
List<String> names = new ArrayList<String>();
for (Filter filter : filters) {
names.add(filter.getClass().getName());
}
return names;
}
public int getRawDriverMajorVersion() {
int version = -1;
if (this.driver != null) {
version = driver.getMajorVersion();
}
return version;
}
public int getRawDriverMinorVersion() {
int version = -1;
if (this.driver != null) {
version = driver.getMinorVersion();
}
return version;
}
public String getProperties() {
Properties properties = new Properties();
properties.putAll(connectProperties);
if (properties.containsKey("password")) {
properties.put("password", "******");
}
return properties.toString();
}
@Override
public void shrink() {
shrink(false, false);
}
public void shrink(boolean checkTime) {
shrink(checkTime, keepAlive);
}
public void shrink(boolean checkTime, boolean keepAlive) {
try {
lock.lockInterruptibly();
} catch (InterruptedException e) {
return;
}
int evictCount = 0;
int keepAliveCount = 0;
try {
if (!inited) {
return;
}
final int checkCount = poolingCount - minIdle;
final long currentTimeMillis = System.currentTimeMillis();
for (int i = 0; i < poolingCount; ++i) {
DruidConnectionHolder connection = connections[i];
if (checkTime) {
if (phyTimeoutMillis > 0) {
long phyConnectTimeMillis = currentTimeMillis - connection.connectTimeMillis;
if (phyConnectTimeMillis > phyTimeoutMillis) {
evictConnections[evictCount++] = connection;
continue;
}
}
long idleMillis = currentTimeMillis - connection.lastActiveTimeMillis;
if (idleMillis < minEvictableIdleTimeMillis
&& idleMillis < keepAliveBetweenTimeMillis
) {
break;
}
if (idleMillis >= minEvictableIdleTimeMillis) {
if (checkTime && i < checkCount) {
evictConnections[evictCount++] = connection;
continue;
} else if (idleMillis > maxEvictableIdleTimeMillis) {
evictConnections[evictCount++] = connection;
continue;
}
}
if (keepAlive && idleMillis >= keepAliveBetweenTimeMillis) {
keepAliveConnections[keepAliveCount++] = connection;
}
} else {
if (i < checkCount) {
evictConnections[evictCount++] = connection;
} else {
break;
}
}
}
int removeCount = evictCount + keepAliveCount;
if (removeCount > 0) {
System.arraycopy(connections, removeCount, connections, 0, poolingCount - removeCount);
Arrays.fill(connections, poolingCount - removeCount, poolingCount, null);
poolingCount -= removeCount;
}
keepAliveCheckCount += keepAliveCount;
} finally {
lock.unlock();
}
if (evictCount > 0) {
for (int i = 0; i < evictCount; ++i) {
DruidConnectionHolder item = evictConnections[i];
Connection connection = item.getConnection();
JdbcUtils.close(connection);
destroyCountUpdater.incrementAndGet(this);
}
Arrays.fill(evictConnections, null);
}
if (keepAliveCount > 0) {
// keep order
for (int i = keepAliveCount - 1; i >= 0; --i) {
DruidConnectionHolder holer = keepAliveConnections[i];
Connection connection = holer.getConnection();
holer.incrementKeepAliveCheckCount();
boolean validate = false;
try {
this.validateConnection(connection);
validate = true;
} catch (Throwable error) {
if (LOG.isDebugEnabled()) {
LOG.debug("keepAliveErr", error);
}
// skip
}
boolean discard = !validate;
if (validate) {
holer.lastKeepTimeMillis = System.currentTimeMillis();
boolean putOk = put(holer);
if (!putOk) {
discard = true;
}
}
if (discard) {
try {
connection.close();
} catch (Exception e) {
// skip
}
lock.lock();
try {
discardCount++;
if (activeCount <= minIdle) {
emptySignal();
}
} finally {
lock.unlock();
}
}
}
this.getDataSourceStat().addKeepAliveCheckCount(keepAliveCount);
Arrays.fill(keepAliveConnections, null);
}
}
public int getWaitThreadCount() {
lock.lock();
try {
return lock.getWaitQueueLength(notEmpty);
} finally {
lock.unlock();
}
}
public long getNotEmptyWaitCount() {
return notEmptyWaitCount;
}
public int getNotEmptyWaitThreadCount() {
lock.lock();
try {
return notEmptyWaitThreadCount;
} finally {
lock.unlock();
}
}
public int getNotEmptyWaitThreadPeak() {
lock.lock();
try {
return notEmptyWaitThreadPeak;
} finally {
lock.unlock();
}
}
public long getNotEmptySignalCount() {
return notEmptySignalCount;
}
public long getNotEmptyWaitMillis() {
return notEmptyWaitNanos / (1000 * 1000);
}
public long getNotEmptyWaitNanos() {
return notEmptyWaitNanos;
}
public int getLockQueueLength() {
return lock.getQueueLength();
}
public int getActivePeak() {
return activePeak;
}
public Date getActivePeakTime() {
if (activePeakTime <= 0) {
return null;
}
return new Date(activePeakTime);
}
public String dump() {
lock.lock();
try {
return this.toString();
} finally {
lock.unlock();
}
}
public long getErrorCount() {
return this.errorCount;
}
public String toString() {
StringBuilder buf = new StringBuilder();
buf.append("{");
buf.append("ntCreateTime:"");
buf.append(Utils.toString(getCreatedTime()));
buf.append(""");
buf.append(",ntActiveCount:");
buf.append(getActiveCount());
buf.append(",ntPoolingCount:");
buf.append(getPoolingCount());
buf.append(",ntCreateCount:");
buf.append(getCreateCount());
buf.append(",ntDestroyCount:");
buf.append(getDestroyCount());
buf.append(",ntCloseCount:");
buf.append(getCloseCount());
buf.append(",ntConnectCount:");
buf.append(getConnectCount());
buf.append(",ntConnections:[");
for (int i = 0; i < poolingCount; ++i) {
DruidConnectionHolder conn = connections[i];
if (conn != null) {
if (i != 0) {
buf.append(",");
}
buf.append("ntt");
buf.append(conn.toString());
}
}
buf.append("nt]");
buf.append("n}");
if (this.isPoolPreparedStatements()) {
buf.append("nn[");
for (int i = 0; i < poolingCount; ++i) {
DruidConnectionHolder conn = connections[i];
if (conn != null) {
if (i != 0) {
buf.append(",");
}
buf.append("nt{ntID:");
buf.append(System.identityHashCode(conn.getConnection()));
PreparedStatementPool pool = conn.getStatementPool();
buf.append(", ntpoolStatements:[");
int entryIndex = 0;
try {
for (Map.Entry<PreparedStatementKey, PreparedStatementHolder> entry : pool.getMap().entrySet()) {
if (entryIndex != 0) {
buf.append(",");
}
buf.append("ntt{hitCount:");
buf.append(entry.getValue().getHitCount());
buf.append(",sql:"");
buf.append(entry.getKey().getSql());
buf.append(""");
buf.append("t}");
entryIndex++;
}
} catch (ConcurrentModificationException e) {
// skip ..
}
buf.append("ntt]");
buf.append("nt}");
}
}
buf.append("n]");
}
return buf.toString();
}
public List<Map<String, Object>> getPoolingConnectionInfo() {
List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
lock.lock();
try {
for (int i = 0; i < poolingCount; ++i) {
DruidConnectionHolder connHolder = connections[i];
Connection conn = connHolder.getConnection();
Map<String, Object> map = new LinkedHashMap<String, Object>();
map.put("id", System.identityHashCode(conn));
map.put("connectionId", connHolder.getConnectionId());
map.put("useCount", connHolder.getUseCount());
if (connHolder.lastActiveTimeMillis > 0) {
map.put("lastActiveTime", new Date(connHolder.lastActiveTimeMillis));
}
if (connHolder.lastKeepTimeMillis > 0) {
map.put("lastKeepTimeMillis", new Date(connHolder.lastKeepTimeMillis));
}
map.put("connectTime", new Date(connHolder.getTimeMillis()));
map.put("holdability", connHolder.getUnderlyingHoldability());
map.put("transactionIsolation", connHolder.getUnderlyingTransactionIsolation());
map.put("autoCommit", connHolder.underlyingAutoCommit);
map.put("readoOnly", connHolder.isUnderlyingReadOnly());
if (connHolder.isPoolPreparedStatements()) {
List<Map<String, Object>> stmtCache = new ArrayList<Map<String, Object>>();
PreparedStatementPool stmtPool = connHolder.getStatementPool();
for (PreparedStatementHolder stmtHolder : stmtPool.getMap().values()) {
Map<String, Object> stmtInfo = new LinkedHashMap<String, Object>();
stmtInfo.put("sql", stmtHolder.key.getSql());
stmtInfo.put("defaultRowPrefetch", stmtHolder.getDefaultRowPrefetch());
stmtInfo.put("rowPrefetch", stmtHolder.getRowPrefetch());
stmtInfo.put("hitCount", stmtHolder.getHitCount());
stmtCache.add(stmtInfo);
}
map.put("pscache", stmtCache);
}
map.put("keepAliveCheckCount", connHolder.getKeepAliveCheckCount());
list.add(map);
}
} finally {
lock.unlock();
}
return list;
}
public void logTransaction(TransactionInfo info) {
long transactionMillis = info.getEndTimeMillis() - info.getStartTimeMillis();
if (transactionThresholdMillis > 0 && transactionMillis > transactionThresholdMillis) {
StringBuilder buf = new StringBuilder();
buf.append("long time transaction, take ");
buf.append(transactionMillis);
buf.append(" ms : ");
for (String sql : info.getSqlList()) {
buf.append(sql);
buf.append(";");
}
LOG.error(buf.toString(), new TransactionTimeoutException());
}
}
@Override
public String getVersion() {
return VERSION.getVersionNumber();
}
@Override
public JdbcDataSourceStat getDataSourceStat() {
return dataSourceStat;
}
public Object clone() throws CloneNotSupportedException {
return cloneDruidDataSource();
}
public DruidDataSource cloneDruidDataSource() {
DruidDataSource x = new DruidDataSource();
cloneTo(x);
return x;
}
public Map<String, Object> getStatDataForMBean() {
try {
Map<String, Object> map = new HashMap<String, Object>();
// 0 - 4
map.put("Name", this.getName());
map.put("URL", this.getUrl());
map.put("CreateCount", this.getCreateCount());
map.put("DestroyCount", this.getDestroyCount());
map.put("ConnectCount", this.getConnectCount());
// 5 - 9
map.put("CloseCount", this.getCloseCount());
map.put("ActiveCount", this.getActiveCount());
map.put("PoolingCount", this.getPoolingCount());
map.put("LockQueueLength", this.getLockQueueLength());
map.put("WaitThreadCount", this.getNotEmptyWaitThreadPeak());
// 10 - 14
map.put("InitialSize", this.getInitialSize());
map.put("MaxActive", this.getMaxActive());
map.put("MinIdle", this.getMinIdle());
map.put("PoolPreparedStatements", this.isPoolPreparedStatements());
map.put("TestOnBorrow", this.isTestOnBorrow());
// 15 - 19
map.put("TestOnReturn", this.isTestOnReturn());
map.put("MinEvictableIdleTimeMillis", this.minEvictableIdleTimeMillis);
map.put("ConnectErrorCount", this.getConnectErrorCount());
map.put("CreateTimespanMillis", this.getCreateTimespanMillis());
map.put("DbType", this.dbType);
// 20 - 24
map.put("ValidationQuery", this.getValidationQuery());
map.put("ValidationQueryTimeout", this.getValidationQueryTimeout());
map.put("DriverClassName", this.getDriverClassName());
map.put("Username", this.getUsername());
map.put("RemoveAbandonedCount", this.getRemoveAbandonedCount());
// 25 - 29
map.put("NotEmptyWaitCount", this.getNotEmptyWaitCount());
map.put("NotEmptyWaitNanos", this.getNotEmptyWaitNanos());
map.put("ErrorCount", this.getErrorCount());
map.put("ReusePreparedStatementCount", this.getCachedPreparedStatementHitCount());
map.put("StartTransactionCount", this.getStartTransactionCount());
// 30 - 34
map.put("CommitCount", this.getCommitCount());
map.put("RollbackCount", this.getRollbackCount());
map.put("LastError", JMXUtils.getErrorCompositeData(this.getLastError()));
map.put("LastCreateError", JMXUtils.getErrorCompositeData(this.getLastCreateError()));
map.put("PreparedStatementCacheDeleteCount", this.getCachedPreparedStatementDeleteCount());
// 35 - 39
map.put("PreparedStatementCacheAccessCount", this.getCachedPreparedStatementAccessCount());
map.put("PreparedStatementCacheMissCount", this.getCachedPreparedStatementMissCount());
map.put("PreparedStatementCacheHitCount", this.getCachedPreparedStatementHitCount());
map.put("PreparedStatementCacheCurrentCount", this.getCachedPreparedStatementCount());
map.put("Version", this.getVersion());
// 40 -
map.put("LastErrorTime", this.getLastErrorTime());
map.put("LastCreateErrorTime", this.getLastCreateErrorTime());
map.put("CreateErrorCount", this.getCreateErrorCount());
map.put("DiscardCount", this.getDiscardCount());
map.put("ExecuteQueryCount", this.getExecuteQueryCount());
map.put("ExecuteUpdateCount", this.getExecuteUpdateCount());
return map;
} catch (JMException ex) {
throw new IllegalStateException("getStatData error", ex);
}
}
public Map<String, Object> getStatData() {
final int activeCount;
final int activePeak;
final Date activePeakTime;
final int poolingCount;
final int poolingPeak;
final Date poolingPeakTime;
final long connectCount;
final long closeCount;
lock.lock();
try {
poolingCount = this.poolingCount;
poolingPeak = this.poolingPeak;
poolingPeakTime = this.getPoolingPeakTime();
activeCount = this.activeCount;
activePeak = this.activePeak;
activePeakTime = this.getActivePeakTime();
connectCount = this.connectCount;
closeCount = this.closeCount;
} finally {
lock.unlock();
}
Map<String, Object> dataMap = new LinkedHashMap<String, Object>();
dataMap.put("Identity", System.identityHashCode(this));
dataMap.put("Name", this.getName());
dataMap.put("DbType", this.dbType);
dataMap.put("DriverClassName", this.getDriverClassName());
dataMap.put("URL", this.getUrl());
dataMap.put("UserName", this.getUsername());
dataMap.put("FilterClassNames", this.getFilterClassNames());
dataMap.put("WaitThreadCount", this.getWaitThreadCount());
dataMap.put("NotEmptyWaitCount", this.getNotEmptyWaitCount());
dataMap.put("NotEmptyWaitMillis", this.getNotEmptyWaitMillis());
dataMap.put("PoolingCount", poolingCount);
dataMap.put("PoolingPeak", poolingPeak);
dataMap.put("PoolingPeakTime", poolingPeakTime);
dataMap.put("ActiveCount", activeCount);
dataMap.put("ActivePeak", activePeak);
dataMap.put("ActivePeakTime", activePeakTime);
dataMap.put("InitialSize", this.getInitialSize());
dataMap.put("MinIdle", this.getMinIdle());
dataMap.put("MaxActive", this.getMaxActive());
dataMap.put("QueryTimeout", this.getQueryTimeout());
dataMap.put("TransactionQueryTimeout", this.getTransactionQueryTimeout());
dataMap.put("LoginTimeout", this.getLoginTimeout());
dataMap.put("ValidConnectionCheckerClassName", this.getValidConnectionCheckerClassName());
dataMap.put("ExceptionSorterClassName", this.getExceptionSorterClassName());
dataMap.put("TestOnBorrow", this.isTestOnBorrow());
dataMap.put("TestOnReturn", this.isTestOnReturn());
dataMap.put("TestWhileIdle", this.isTestWhileIdle());
dataMap.put("DefaultAutoCommit", this.isDefaultAutoCommit());
dataMap.put("DefaultReadOnly", this.getDefaultReadOnly());
dataMap.put("DefaultTransactionIsolation", this.getDefaultTransactionIsolation());
dataMap.put("LogicConnectCount", connectCount);
dataMap.put("LogicCloseCount", closeCount);
dataMap.put("LogicConnectErrorCount", this.getConnectErrorCount());
dataMap.put("PhysicalConnectCount", this.getCreateCount());
dataMap.put("PhysicalCloseCount", this.getDestroyCount());
dataMap.put("PhysicalConnectErrorCount", this.getCreateErrorCount());
dataMap.put("ExecuteCount", this.getExecuteCount());
dataMap.put("ExecuteUpdateCount", this.getExecuteUpdateCount());
dataMap.put("ExecuteQueryCount", this.getExecuteQueryCount());
dataMap.put("ExecuteBatchCount", this.getExecuteBatchCount());
dataMap.put("ErrorCount", this.getErrorCount());
dataMap.put("CommitCount", this.getCommitCount());
dataMap.put("RollbackCount", this.getRollbackCount());
dataMap.put("PSCacheAccessCount", this.getCachedPreparedStatementAccessCount());
dataMap.put("PSCacheHitCount", this.getCachedPreparedStatementHitCount());
dataMap.put("PSCacheMissCount", this.getCachedPreparedStatementMissCount());
dataMap.put("StartTransactionCount", this.getStartTransactionCount());
dataMap.put("TransactionHistogram", this.getTransactionHistogramValues());
dataMap.put("ConnectionHoldTimeHistogram", this.getDataSourceStat().getConnectionHoldHistogram().toArray());
dataMap.put("RemoveAbandoned", this.isRemoveAbandoned());
dataMap.put("ClobOpenCount", this.getDataSourceStat().getClobOpenCount());
dataMap.put("BlobOpenCount", this.getDataSourceStat().getBlobOpenCount());
dataMap.put("KeepAliveCheckCount", this.getDataSourceStat().getKeepAliveCheckCount());
dataMap.put("KeepAlive", this.isKeepAlive());
dataMap.put("FailFast", this.isFailFast());
dataMap.put("MaxWait", this.getMaxWait());
dataMap.put("MaxWaitThreadCount", this.getMaxWaitThreadCount());
dataMap.put("PoolPreparedStatements", this.isPoolPreparedStatements());
dataMap.put("MaxPoolPreparedStatementPerConnectionSize", this.getMaxPoolPreparedStatementPerConnectionSize());
dataMap.put("MinEvictableIdleTimeMillis", this.minEvictableIdleTimeMillis);
dataMap.put("MaxEvictableIdleTimeMillis", this.maxEvictableIdleTimeMillis);
dataMap.put("LogDifferentThread", isLogDifferentThread());
dataMap.put("RecycleErrorCount", getRecycleErrorCount());
dataMap.put("PreparedStatementOpenCount", getPreparedStatementCount());
dataMap.put("PreparedStatementClosedCount", getClosedPreparedStatementCount());
dataMap.put("UseUnfairLock", isUseUnfairLock());
dataMap.put("InitGlobalVariants", isInitGlobalVariants());
dataMap.put("InitVariants", isInitVariants());
return dataMap;
}
public JdbcSqlStat getSqlStat(int sqlId) {
return this.getDataSourceStat().getSqlStat(sqlId);
}
public JdbcSqlStat getSqlStat(long sqlId) {
return this.getDataSourceStat().getSqlStat(sqlId);
}
public Map<String, JdbcSqlStat> getSqlStatMap() {
return this.getDataSourceStat().getSqlStatMap();
}
public Map<String, Object> getWallStatMap() {
WallProviderStatValue wallStatValue = getWallStatValue(false);
if (wallStatValue != null) {
return wallStatValue.toMap();
}
return null;
}
public WallProviderStatValue getWallStatValue(boolean reset) {
for (Filter filter : this.filters) {
if (filter instanceof WallFilter) {
WallFilter wallFilter = (WallFilter) filter;
return wallFilter.getProvider().getStatValue(reset);
}
}
return null;
}
public Lock getLock() {
return lock;
}
@Override
public boolean isWrapperFor(Class<?> iface) {
for (Filter filter : this.filters) {
if (filter.isWrapperFor(iface)) {
return true;
}
}
if (this.statLogger != null
&& (this.statLogger.getClass() == iface || DruidDataSourceStatLogger.class == iface)) {
return true;
}
return super.isWrapperFor(iface);
}
@SuppressWarnings("unchecked")
public <T> T unwrap(Class<T> iface) {
for (Filter filter : this.filters) {
if (filter.isWrapperFor(iface)) {
return (T) filter;
}
}
if (this.statLogger != null
&& (this.statLogger.getClass() == iface || DruidDataSourceStatLogger.class == iface)) {
return (T) statLogger;
}
return super.unwrap(iface);
}
public boolean isLogDifferentThread() {
return logDifferentThread;
}
public void setLogDifferentThread(boolean logDifferentThread) {
this.logDifferentThread = logDifferentThread;
}
public DruidPooledConnection tryGetConnection() throws SQLException {
if (poolingCount == 0) {
return null;
}
return getConnection();
}
@Override
public int fill() throws SQLException {
return this.fill(this.maxActive);
}
@Override
public int fill(int toCount) throws SQLException {
if (closed) {
throw new DataSourceClosedException("dataSource already closed at " + new Date(closeTimeMillis));
}
if (toCount < 0) {
throw new IllegalArgumentException("toCount can't not be less than zero");
}
init();
if (toCount > this.maxActive) {
toCount = this.maxActive;
}
int fillCount = 0;
for (;;) {
try {
lock.lockInterruptibly();
} catch (InterruptedException e) {
connectErrorCountUpdater.incrementAndGet(this);
throw new SQLException("interrupt", e);
}
boolean fillable = this.isFillable(toCount);
lock.unlock();
if (!fillable) {
break;
}
DruidConnectionHolder holder;
try {
PhysicalConnectionInfo pyConnInfo = createPhysicalConnection();
holder = new DruidConnectionHolder(this, pyConnInfo);
} catch (SQLException e) {
LOG.error("fill connection error, url: " + this.jdbcUrl, e);
connectErrorCountUpdater.incrementAndGet(this);
throw e;
}
try {
lock.lockInterruptibly();
} catch (InterruptedException e) {
connectErrorCountUpdater.incrementAndGet(this);
throw new SQLException("interrupt", e);
}
try {
if (!this.isFillable(toCount)) {
JdbcUtils.close(holder.getConnection());
LOG.info("fill connections skip.");
break;
}
this.putLast(holder, System.currentTimeMillis());
fillCount++;
} finally {
lock.unlock();
}
}
if (LOG.isInfoEnabled()) {
LOG.info("fill " + fillCount + " connections");
}
return fillCount;
}
private boolean isFillable(int toCount) {
int currentCount = this.poolingCount + this.activeCount;
if (currentCount >= toCount || currentCount >= this.maxActive) {
return false;
} else {
return true;
}
}
public boolean isFull() {
lock.lock();
try {
return this.poolingCount + this.activeCount >= this.maxActive;
} finally {
lock.unlock();
}
}
private void emptySignal() {
if (createScheduler == null) {
empty.signal();
return;
}
if (createTaskCount >= maxCreateTaskCount) {
return;
}
if (activeCount + poolingCount + createTaskCount >= maxActive) {
return;
}
createTaskCount++;
CreateConnectionTask task = new CreateConnectionTask();
this.createSchedulerFuture = createScheduler.submit(task);
}
@Override
public ObjectName preRegister(MBeanServer server, ObjectName name) throws Exception {
if (server != null) {
try {
if (server.isRegistered(name)) {
server.unregisterMBean(name);
}
} catch (Exception ex) {
LOG.warn("DruidDataSource preRegister error", ex);
}
}
return name;
}
@Override
public void postRegister(Boolean registrationDone) {
}
@Override
public void preDeregister() throws Exception {
}
@Override
public void postDeregister() {
}
public boolean isClosed() {
return this.closed;
}
}
参考阅读
Java魔法类：Unsafe应用解析
面试官：说说 Java 中的 Unsafe 和 CAS
sun.misc.Unsafe.park(Native Method)异常
深入理解sun.misc.Unsafe原理
最后
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