springboot中使用snmp4j对linux及windows系统进行资源情况监测

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<!--snmp4j-->
<dependency>
<groupId>org.snmp4j</groupId>
<artifactId>snmp4j</artifactId>
<version>2.5.11</version>
</dependency>

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import com.alibaba.fastjson.JSON;
import com.cecjx.common.config.DictRedisConfig;
import com.cecjx.common.domain.DictDO;
import com.cecjx.oamonitor.domain.SnmpOid;
import org.apache.commons.lang3.StringUtils;
import org.apache.log4j.Logger;
import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.TransportMapping;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.event.ResponseListener;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.*;
import org.snmp4j.transport.DefaultUdpTransportMapping;
import java.io.IOException;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
public class SnmpUtils {
private static final Logger logger = Logger.getLogger(SnmpUtils.class);
public static CommunityTarget createDefault(String ip, String community, String port) {
if (StringUtils.isBlank(ip)) {
throw new NullPointerException("ip is null.");
}
if (StringUtils.isBlank(community)) {
throw new NullPointerException("community is null.");
}
Address address = GenericAddress.parse("udp:" + ip + "/" + port);
CommunityTarget target = new CommunityTarget();
target.setCommunity(new OctetString(community));
target.setAddress(address);
target.setVersion(SnmpConstants.version2c);
target.setTimeout(3000);
target.setRetries(5);
return target;
}
public static List<Map<String, String>> snmpGet(String ip, String community, String port, String oid) {
if (StringUtils.isBlank(ip)) {
throw new NullPointerException("ip is null.");
}
if (StringUtils.isBlank(community)) {
throw new NullPointerException("community is null.");
}
List<Map<String, String>> list = null;
CommunityTarget target = createDefault(ip, community, port);
Snmp snmp = null;
try {
PDU pdu = new PDU();
pdu.add(new VariableBinding(new OID(oid)));
DefaultUdpTransportMapping transport = new DefaultUdpTransportMapping();
snmp = new Snmp(transport);
snmp.listen();
pdu.setType(PDU.GET);
ResponseEvent respEvent = snmp.send(pdu, target);
PDU response = respEvent.getResponse();
if (null != response && response.size() > 0) {
list = new ArrayList<Map<String, String>>();
for (VariableBinding vb : response.getVariableBindings()) {
Map<String, String> map = new HashMap<String, String>();
map.put(oid, vb.toValueString());
list.add(map);
}
}
} catch (Exception e) {
logger.error(e.getMessage());
} finally {
closeSnmp(snmp);
}
return list;
}
public static void snmpGetList(String ip, String community, String port, List<String> oidList) {
if (StringUtils.isBlank(ip)) {
throw new NullPointerException("ip is null.");
}
if (StringUtils.isBlank(community)) {
throw new NullPointerException("community is null.");
}
if (null == oidList || oidList.isEmpty()) {
throw new NullPointerException("oidList is null.");
}
CommunityTarget target = createDefault(ip, community, port);
Snmp snmp = null;
try {
PDU pdu = new PDU();
for (String oid : oidList) {
pdu.add(new VariableBinding(new OID(oid)));
}
DefaultUdpTransportMapping transport = new DefaultUdpTransportMapping();
snmp = new Snmp(transport);
snmp.listen();
pdu.setType(PDU.GET);
ResponseEvent respEvent = snmp.send(pdu, target);
PDU response = respEvent.getResponse();
if (null != response && response.size() > 0) {
for (VariableBinding vb : response.getVariableBindings()) {
logger.info(vb.getOid() + " = " + vb.getVariable());
}
}
} catch (Exception e) {
logger.error(e.getMessage());
} finally {
closeSnmp(snmp);
}
}
public static void snmpAsynGetList(String ip, String community, String port, List<String> oidList) {
if (StringUtils.isBlank(ip)) {
throw new NullPointerException("ip is null.");
}
if (StringUtils.isBlank(community)) {
throw new NullPointerException("community is null.");
}
if (null == oidList || oidList.isEmpty()) {
throw new NullPointerException("oidList is null.");
}
CommunityTarget target = createDefault(ip, community, port);
Snmp snmp = null;
try {
PDU pdu = new PDU();
for (String oid : oidList) {
pdu.add(new VariableBinding(new OID(oid)));
}
DefaultUdpTransportMapping transport = new DefaultUdpTransportMapping();
snmp = new Snmp(transport);
snmp.listen();
pdu.setType(PDU.GET);
/*异步获取*/
final CountDownLatch latch = new CountDownLatch(1);
ResponseListener listener = new ResponseListener() {
@Override
public void onResponse(ResponseEvent event) {
((Snmp) event.getSource()).cancel(event.getRequest(), this);
PDU response = event.getResponse();
if (null != response && response.size() > 0) {
for (VariableBinding vb : response.getVariableBindings()) {
logger.info(vb.getOid() + " = " + vb.getVariable());
}
latch.countDown();
}
}
};
pdu.setType(PDU.GET);
snmp.send(pdu, target, null, listener);
boolean wait = latch.await(30, TimeUnit.SECONDS);
snmp.close();
} catch (Exception e) {
logger.error(e.getMessage());
} finally {
closeSnmp(snmp);
}
}
public static Map<String, String> snmpWalk(String ip, String community, String port, String targetOid) {
CommunityTarget target = createDefault(ip, community, port);
TransportMapping transport = null;
Snmp snmp = null;
Map<String, String> map = new HashMap();
try {
transport = new DefaultUdpTransportMapping();
snmp = new Snmp(transport);
transport.listen();
PDU pdu = new PDU();
OID targetOID = new OID(targetOid);
pdu.add(new VariableBinding(targetOID));
boolean finished = false;
while (!finished) {
VariableBinding vb = null;
ResponseEvent respEvent = snmp.getNext(pdu, target);
PDU response = respEvent.getResponse();
if (null == response) {
System.out.println("responsePDU == null");
finished = true;
break;
} else {
vb = response.get(0);
}
finished = checkWalkFinished(targetOID, pdu, vb);
if (!finished) {
logger.info(vb.getOid() + " = " + vb.getVariable());
pdu.setRequestID(new Integer32(0));
pdu.set(0, vb);
map.put(vb.getOid().toString(), vb.getVariable().toString());
} else {
snmp.close();
}
}
} catch (Exception e) {
logger.error(e.getMessage());
} finally {
closeSnmp(snmp);
}
return map;
}
public static void closeSnmp(Snmp snmp) {
try {
if (null != snmp) {
snmp.close();
}
} catch (IOException e) {
logger.error(e.getMessage());
}
}
private static boolean checkWalkFinished(OID targetOID, PDU pdu, VariableBinding vb) {
boolean finished = false;
if (pdu.getErrorStatus() != 0) {
logger.info("[true] responsePDU.getErrorStatus() != 0");
logger.info(pdu.getErrorStatusText());
finished = true;
} else if (vb.getOid() == null) {
logger.info("[true] vb.getOid() == null");
finished = true;
} else if (vb.getOid().size() < targetOID.size()) {
logger.info("[true] vb.getOid().size() < targetOID.size()");
finished = true;
} else if (targetOID.leftMostCompare(targetOID.size(), vb.getOid()) != 0) {
logger.info("[true] targetOID.leftMostCompare() != 0");
finished = true;
} else if (Null.isExceptionSyntax(vb.getVariable().getSyntax())) {
logger.info("[true] Null.isExceptionSyntax(vb.getVariable().getSyntax())");
finished = true;
} else if (vb.getOid().compareTo(targetOID) <= 0) {
logger.info("[true] Variable received is not " + "lexicographic successor of requested " + "one:");
logger.info(vb.toString() + " <= " + targetOID);
finished = true;
}
return finished;
}
public static String getPrintSize(long size) {
//如果字节数少于1024，则直接以B为单位，否则先除于1024，后3位因太少无意义
if (size < 1024) {
return String.valueOf(size) + "B";
} else {
size = size / 1024;
}
//如果原字节数除于1024之后，少于1024，则可以直接以KB作为单位
//因为还没有到达要使用另一个单位的时候
//接下去以此类推
if (size < 1024) {
return String.valueOf(size) + "KB";
} else {
size = size / 1024;
}
if (size < 1024) {
//因为如果以MB为单位的话，要保留最后1位小数，
//因此，把此数乘以100之后再取余
size = size * 100;
return String.valueOf((size / 100)) + "."
+ String.valueOf((size % 100)) + "MB";
} else {
//否则如果要以GB为单位的，先除于1024再作同样的处理
size = size * 100 / 1024;
return String.valueOf((size / 100)) + "."
+ String.valueOf((size % 100)) + "GB";
}
}
//从redis获取字典表里的oid数据
public static SnmpOid getOid(RedisUtil redisUtil, String oidType) {
SnmpOid snmpOid = new SnmpOid();
Object obj = redisUtil.getObject(DictRedisConfig.dictResisPrefix + oidType);
List<DictDO> oidList = JSON.parseArray(redisUtil.getObject(DictRedisConfig.dictResisPrefix + oidType).toString(), DictDO.class);
if (oidList.size() > 0) {
for (DictDO dictDO : oidList) {
switch (dictDO.getName()) {
case "sysDescOid":
snmpOid.setSysDescOid(dictDO.getValue());
break;
case "ramTotalOid":
snmpOid.setRamTotalOid(dictDO.getValue());
break;
case "ramAvailableOid":
snmpOid.setRamAvailableOid(dictDO.getValue());
break;
case "ramSharedOid":
snmpOid.setRamSharedOid(dictDO.getValue());
break;
case "ramBufferOid":
snmpOid.setRamBufferOid(dictDO.getValue());
break;
case "ramCachedOid":
snmpOid.setRamCachedOid(dictDO.getValue());
break;
case "cpuProcessorLoadOid":
snmpOid.setCpuProcessorLoadOid(dictDO.getValue());
break;
case "diskPathOid":
snmpOid.setDiskPathOid(dictDO.getValue());
break;
case "diskTypeOid":
snmpOid.setDiskTypeOid(dictDO.getValue());
break;
case "diskAllocationUnitsOid":
snmpOid.setDiskAllocationUnitsOid(dictDO.getValue());
break;
case "diskStorageSizeOid":
snmpOid.setDiskStorageSizeOid(dictDO.getValue());
break;
case "diskUsedOid":
snmpOid.setDiskUsedOid(dictDO.getValue());
break;
case "mainDiskUsedOid":
snmpOid.setMainDiskUsedOid(dictDO.getValue());
break;
case "sendOid":
snmpOid.setSendOid(dictDO.getValue());
break;
case "receiveOid":
snmpOid.setReceiveOid(dictDO.getValue());
break;
case "cpuIdleOId":
snmpOid.setCpuIdleOId(dictDO.getValue());
break;
}
}
return snmpOid;
} else {
return null;
}
}
//统一判断snmp的返回数据是否有误
public static Boolean ifListTrue(List<Map<String, String>> list, String oid) {
return list != null && list.size() > 0 && list.get(0).get(oid) != null && !list.get(0).get(oid).equals("noSuchInstance") && !list.get(0).get(oid).equals("noSuchObject");
}
public static String getChinese(String octetString) {
//snmp4j遇到中文直接转成16进制字符串
try {
String[] temps = octetString.split(":");
byte[] bs = new byte[temps.length];
for (int i = 0; i < temps.length; i++)
bs[i] = (byte) Integer.parseInt(temps[i], 16);
return new String(bs, "GB2312");
} catch (Exception e) {
return octetString;
}
}
public static void main(String[] args) {
String memTotal = ".1.3.6.1.4.1.2021.4.5.0";
String memAvailable = ".1.3.6.1.4.1.2021.4.6.0";
String memShared = ".1.3.6.1.4.1.2021.4.13.0";
String memBuffer = ".1.3.6.1.4.1.2021.4.14.0";
String memCached = ".1.3.6.1.4.1.2021.4.15.0";
List<Map<String, String>> memTotalList = SnmpUtils.snmpGet("", "public", "161", memTotal);
List<Map<String, String>> memAvailableList = SnmpUtils.snmpGet("", "public", "161", memAvailable);
List<Map<String, String>> memSharedList = SnmpUtils.snmpGet("", "public", "161", memShared);
List<Map<String, String>> memBufferList = SnmpUtils.snmpGet("", "public", "161", memBuffer);
List<Map<String, String>> memCachedList = SnmpUtils.snmpGet("", "public", "161", memCached);
Long memTotalTemp = Long.parseLong(memTotalList.get(0).get(memTotal));
Long memAvailableTemp = Long.parseLong(memAvailableList.get(0).get(memAvailable));
Long memSharedTemp = Long.parseLong(memSharedList.get(0).get(memShared));
Long memBufferTemp = Long.parseLong(memBufferList.get(0).get(memBuffer));
Long memCachedTemp = Long.parseLong(memCachedList.get(0).get(memCached));
if (memSharedTemp + memAvailableTemp + memCachedTemp > memTotalTemp) {
Long temp = memTotalTemp - memAvailableTemp - memBufferTemp - memCachedTemp + memSharedTemp;
String used = new DecimalFormat("0").format(temp * 100 / memTotalTemp);
System.out.println(temp);
System.out.println(memTotalTemp);
System.out.println(used);
System.out.println("111");
} else {
Long temp = memTotalTemp - memAvailableTemp - memBufferTemp - memCachedTemp;
String used = new DecimalFormat("0").format(temp * 100 / memTotalTemp);
System.out.println(temp);
System.out.println(memTotalTemp);
System.out.println(used);
System.out.println("222");
}
}
}

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public static void main(String[] args) {
String memTotal = ".1.3.6.1.4.1.2021.4.5.0";
List<Map<String, String>> memTotalList = SnmpUtils.snmpGet("ip", "public", "161", memTotal);
Long memTotalTemp = Long.parseLong(memTotalList.get(0).get(memTotal));
System.out.println(memTotalTemp);
}
}