spring线程池

1、重写spring默认的异步线程池，限制最大数，防止内存被干爆

import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.AsyncConfigurer;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;
/**
* 重写spring默认的异步线程池，限制最大数，防止内存被干爆
*/
@Slf4j
@Configuration
@EnableAsync
public class SpringDefaultAsyncExecutor implements AsyncConfigurer {
@Override
public Executor getAsyncExecutor() {
ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
executor.setCorePoolSize(3);
executor.setMaxPoolSize(20);
executor.setQueueCapacity(1000);
executor.setKeepAliveSeconds(300);
executor.setThreadNamePrefix("spring-default-async-Executor-");
executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
executor.initialize();
return executor;
}
}

2、 自定义线程池，方法调用

import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import java.util.concurrent.Executor;
/**
* 自定义线程池
*/
@Slf4j
@Configuration
@EnableAsync
public class AsyncExecutor {
/**
* xxx调用此线程池
* @Async("xxxAsyncExecutor")
* @return
*/
@Bean
public Executor xxxAsyncExecutor() {
ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
// 核心线程数
executor.setCorePoolSize(3);
// 最大线程数
executor.setMaxPoolSize(5);
// 队列大小，1000个，可排队
executor.setQueueCapacity(1000);
//
executor.setWaitForTasksToCompleteOnShutdown(true);
// 线程名称前缀
executor.setThreadNamePrefix("async-xxx-Executor-");
executor.initialize();
return executor;
}
}

如果配置多个线程池，在AsyncExecutor 类中添加bean即可。

最后

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