使用自定义线程池执行定时任务，避免程序OOM

eladmin-system/src/main/java/me/zhengjie/config/thread/AsyncTaskExecutePool.java

+package me.zhengjie.config.thread;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.annotation.AsyncConfigurer;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
+import java.lang.reflect.Method;
+import java.util.concurrent.Executor;
+import java.util.concurrent.ThreadPoolExecutor;
+
+/**
+ * 异步任务线程池装配类
+ * @author https://juejin.im/entry/5abb8f6951882555677e9da2
+ * @date 2019年10月31日15:06:18
+ */
+@Slf4j
+@Configuration
+public class AsyncTaskExecutePool implements AsyncConfigurer {
+
+    //注入配置类
+    private final AsyncTaskProperties config;
+
+    public AsyncTaskExecutePool(AsyncTaskProperties config) {
+        this.config = config;
+    }
+
+    @Override
+    public Executor getAsyncExecutor() {
+        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
+        //核心线程池大小
+        executor.setCorePoolSize(config.getCorePoolSize());
+        //最大线程数
+        executor.setMaxPoolSize(config.getMaxPoolSize());
+        //队列容量
+        executor.setQueueCapacity(config.getQueueCapacity());
+        //活跃时间
+        executor.setKeepAliveSeconds(config.getKeepAliveSeconds());
+        //线程名字前缀
+        executor.setThreadNamePrefix("el-executor-");
+        // setRejectedExecutionHandler：当pool已经达到max size的时候，如何处理新任务
+        // CallerRunsPolicy：不在新线程中执行任务，而是由调用者所在的线程来执行
+        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
+        executor.initialize();
+        return executor;
+    }
+
+    @Override
+    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
+        return new AsyncUncaughtExceptionHandler() {
+            @Override
+            public void handleUncaughtException(Throwable throwable, Method method, Object... objects) {
+                log.error("=========================="+throwable.getMessage()+"=======================", throwable);
+                log.error("exception method:"+method.getName());
+            }
+        };
+    }
+}

eladmin-system/src/main/java/me/zhengjie/config/thread/AsyncTaskProperties.java

+package me.zhengjie.config.thread;
+
+import lombok.Data;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.stereotype.Component;
+
+/**
+ * 线程池配置属性类
+ * @author https://juejin.im/entry/5abb8f6951882555677e9da2
+ * @date 2019年10月31日14:58:18
+ */
+@Data
+@Component
+@ConfigurationProperties(prefix = "task.pool")
+public class AsyncTaskProperties {
+
+    private int corePoolSize;
+
+    private int maxPoolSize;
+
+    private int keepAliveSeconds;
+
+    private int queueCapacity;
+}

eladmin-system/src/main/java/me/zhengjie/config/thread/TheadFactoryName.java

+package me.zhengjie.config.thread;
+
+import org.springframework.stereotype.Component;
+
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * 自定义线程名称
+ * @author Zheng Jie
+ * @date 2019年10月31日17:49:55
+ */
+@Component
+public class TheadFactoryName implements ThreadFactory {
+
+    private static final AtomicInteger poolNumber = new AtomicInteger(1);
+    private final ThreadGroup group;
+    private final AtomicInteger threadNumber = new AtomicInteger(1);
+    private final String namePrefix;
+
+    public TheadFactoryName() {
+        this("el-pool");
+    }
+
+    private TheadFactoryName(String name){
+        SecurityManager s = System.getSecurityManager();
+        group = (s != null) ? s.getThreadGroup() :
+                Thread.currentThread().getThreadGroup();
+        //此时namePrefix就是 name + 第几个用这个工厂创建线程池的
+        this.namePrefix = name +
+                poolNumber.getAndIncrement();
+    }
+
+    @Override
+    public Thread newThread(Runnable r) {
+        //此时线程的名字 就是 namePrefix + -thread- + 这个线程池中第几个执行的线程
+        Thread t = new Thread(group, r,
+                namePrefix + "-thread-"+threadNumber.getAndIncrement(),
+                0);
+        if (t.isDaemon()) {
+            t.setDaemon(false);
+        }
+        if (t.getPriority() != Thread.NORM_PRIORITY) {
+            t.setPriority(Thread.NORM_PRIORITY);
+        }
+        return t;
+    }
+}

eladmin-system/src/main/java/me/zhengjie/config/thread/ThreadPoolExecutorUtil.java

+package me.zhengjie.config.thread;
+
+import me.zhengjie.utils.SpringContextHolder;
+
+import java.util.concurrent.ArrayBlockingQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * 用于获取自定义线程池
+ * @author Zheng Jie
+ * @date 2019年10月31日18:16:47
+ */
+public class ThreadPoolExecutorUtil {
+
+    public static ThreadPoolExecutor getPoll(){
+        AsyncTaskProperties properties = SpringContextHolder.getBean(AsyncTaskProperties.class);
+        return new ThreadPoolExecutor(
+                properties.getCorePoolSize(),
+                properties.getMaxPoolSize(),
+                properties.getKeepAliveSeconds(),
+                TimeUnit.SECONDS,
+                new ArrayBlockingQueue<Runnable>(properties.getQueueCapacity()),
+                new TheadFactoryName()
+        );
+    }
+}

eladmin-system/src/main/java/me/zhengjie/modules/quartz/task/TestTask.java

@@ -11,7 +11,7 @@ import org.springframework.stereotype.Component;
 @Slf4j
 @Component
 public class TestTask {
-    
+
     public void run(){
         log.info("执行成功");
     }

eladmin-system/src/main/java/me/zhengjie/modules/quartz/utils/ExecutionJob.java

 package me.zhengjie.modules.quartz.utils;
 
+import me.zhengjie.config.thread.TheadFactoryName;
+import me.zhengjie.config.thread.ThreadPoolExecutorUtil;
 import me.zhengjie.modules.quartz.domain.QuartzJob;
 import me.zhengjie.modules.quartz.domain.QuartzLog;
 import me.zhengjie.modules.quartz.repository.QuartzLogRepository;
@@ -11,9 +13,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.scheduling.annotation.Async;
 import org.springframework.scheduling.quartz.QuartzJobBean;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-import java.util.concurrent.Future;
+import java.util.concurrent.*;
 
 /**
  * 参考人人开源，https://gitee.com/renrenio/renren-security
@@ -25,8 +25,8 @@ public class ExecutionJob extends QuartzJobBean {
 
     private Logger logger = LoggerFactory.getLogger(this.getClass());
 
-    // 建议自定义线程池实现方式，该处仅供参考
-    private ExecutorService executorService = Executors.newSingleThreadExecutor();
+    // 该处仅供参考
+    private final static ThreadPoolExecutor executor = ThreadPoolExecutorUtil.getPoll();
 
     @Override
     @SuppressWarnings("unchecked")
@@ -48,7 +48,7 @@ public class ExecutionJob extends QuartzJobBean {
             logger.info("任务准备执行，任务名称：{}", quartzJob.getJobName());
             QuartzRunnable task = new QuartzRunnable(quartzJob.getBeanName(), quartzJob.getMethodName(),
                     quartzJob.getParams());
-            Future<?> future = executorService.submit(task);
+            Future<?> future = executor.submit(task);
             future.get();
             long times = System.currentTimeMillis() - startTime;
             log.setTime(times);

eladmin-system/src/main/resources/config/application.yml

@@ -29,6 +29,17 @@ spring:
     #连接超时时间
     timeout: 5000
 
+task:
+  pool:
+    # 核心线程池大小
+    core-pool-size: 10
+    # 最大线程数
+    max-pool-size: 30
+    # 活跃时间
+    keep-alive-seconds: 60
+    # 队列容量
+    queue-capacity: 50
+
 #七牛云
 qiniu:
   # 文件大小 /M