org.apache.tomcat.util.threads.TaskQueue Java Examples

/**
 * Start the component and implement the requirements
 * of {@link org.apache.catalina.util.LifecycleBase#startInternal()}.
 *
 * @exception LifecycleException if this component detects a fatal error
 *  that prevents this component from being used
 *
 *
 */
@Override
protected void startInternal() throws LifecycleException {
    //重写了LinkedBlockingQueue的offer方法。
    taskqueue = new TaskQueue(maxQueueSize);
    TaskThreadFactory tf = new TaskThreadFactory(namePrefix,daemon,getThreadPriority());
    //此ThreadPoolExecutor非彼ThreadPoolExecutor。
    executor = new ThreadPoolExecutor(getMinSpareThreads(), getMaxThreads(), maxIdleTime, TimeUnit.MILLISECONDS,taskqueue, tf);
    executor.setThreadRenewalDelay(threadRenewalDelay);
    if (prestartminSpareThreads) {
        executor.prestartAllCoreThreads();
    }
    taskqueue.setParent(executor);

    setState(LifecycleState.STARTING);
}
 

/**
 * 关闭线程池
 */
public void shutdownExecutor() {
    Executor executor = this.executor;
    if (executor != null && internalExecutor) {
        this.executor = null;
        if (executor instanceof ThreadPoolExecutor) {
            //this is our internal one, so we need to shut it down
            ThreadPoolExecutor tpe = (ThreadPoolExecutor) executor;
            tpe.shutdownNow();
            long timeout = getExecutorTerminationTimeoutMillis();
            if (timeout > 0) {
                try {
                    tpe.awaitTermination(timeout, TimeUnit.MILLISECONDS);
                } catch (InterruptedException e) {
                    // Ignore
                }
                if (tpe.isTerminating()) {
                    getLog().warn(sm.getString("endpoint.warn.executorShutdown", getName()));
                }
            }
            TaskQueue queue = (TaskQueue) tpe.getQueue();
            queue.setParent(null);
        }
    }
}
 

public void shutdownExecutor() {
    if ( executor!=null && internalExecutor ) {
        if ( executor instanceof ThreadPoolExecutor ) {
            //this is our internal one, so we need to shut it down
            ThreadPoolExecutor tpe = (ThreadPoolExecutor) executor;
            tpe.shutdownNow();
            long timeout = getExecutorTerminationTimeoutMillis();
            if (timeout > 0) {
                try {
                    tpe.awaitTermination(timeout, TimeUnit.MILLISECONDS);
                } catch (InterruptedException e) {
                    // Ignore
                }
                if (tpe.isTerminating()) {
                    getLog().warn(sm.getString("endpoint.warn.executorShutdown", getName()));
                }
            }
            TaskQueue queue = (TaskQueue) tpe.getQueue();
            queue.setParent(null);
        }
        executor = null;
    }
}
 

public void shutdownExecutor() {
    if ( executor!=null && internalExecutor ) {
        if ( executor instanceof ThreadPoolExecutor ) {
            //this is our internal one, so we need to shut it down
            ThreadPoolExecutor tpe = (ThreadPoolExecutor) executor;
            tpe.shutdownNow();
            long timeout = getExecutorTerminationTimeoutMillis();
            if (timeout > 0) {
                try {
                    tpe.awaitTermination(timeout, TimeUnit.MILLISECONDS);
                } catch (InterruptedException e) {
                    // Ignore
                }
                if (tpe.isTerminating()) {
                    getLog().warn(sm.getString("endpoint.warn.executorShutdown", getName()));
                }
            }
            TaskQueue queue = (TaskQueue) tpe.getQueue();
            queue.setParent(null);
        }
        executor = null;
    }
}
 

@Override
public void execute(Runnable command) {
    if ( executor != null ) {
        try {
            executor.execute(command);
        } catch (RejectedExecutionException rx) {
            //there could have been contention around the queue
            if ( !( (TaskQueue) executor.getQueue()).force(command) ) throw new RejectedExecutionException("Work queue full.");
        }
    } else throw new IllegalStateException("StandardThreadPool not started.");
}
 

/**
 * 创建I/O密集型的线程池。
 * 重点在内部。
 */
public void createExecutor() {
    internalExecutor = true;
    TaskQueue taskqueue = new TaskQueue();
    TaskThreadFactory tf = new TaskThreadFactory(getName() + "-exec-", daemon, getThreadPriority());
    executor = new ThreadPoolExecutor(getMinSpareThreads(), getMaxThreads(), 60, TimeUnit.SECONDS,taskqueue, tf);
    taskqueue.setParent( (ThreadPoolExecutor) executor);
}
 

/**
 * Custom tomcat executor
 * 
 * @param protocol
 * @return
 */
private Executor customTomcatExecutor(AbstractProtocol<?> protocol) {
	TaskThreadFactory tf = new TaskThreadFactory(protocol.getName() + "-exe-", true, protocol.getThreadPriority());
	TaskQueue taskqueue = new TaskQueue();
	Executor executor = new ThreadPoolExecutor(protocol.getMinSpareThreads(), protocol.getMaxThreads(), 60, TimeUnit.SECONDS,
			taskqueue, tf);
	taskqueue.setParent((ThreadPoolExecutor) executor);
	return executor;
}
 

/**
 * Start the component and implement the requirements
 * of {@link org.apache.catalina.util.LifecycleBase#startInternal()}.
 *
 * @exception LifecycleException if this component detects a fatal error
 *  that prevents this component from being used
 */
@Override
protected void startInternal() throws LifecycleException {

    taskqueue = new TaskQueue(maxQueueSize);
    TaskThreadFactory tf = new TaskThreadFactory(namePrefix,daemon,getThreadPriority());
    executor = new ThreadPoolExecutor(getMinSpareThreads(), getMaxThreads(), maxIdleTime, TimeUnit.MILLISECONDS,taskqueue, tf);
    executor.setThreadRenewalDelay(threadRenewalDelay);
    if (prestartminSpareThreads) {
        executor.prestartAllCoreThreads();
    }
    taskqueue.setParent(executor);

    setState(LifecycleState.STARTING);
}
 

@Override
public void execute(Runnable command) {
    if ( executor != null ) {
        try {
            executor.execute(command);
        } catch (RejectedExecutionException rx) {
            //there could have been contention around the queue
            if ( !( (TaskQueue) executor.getQueue()).force(command) ) throw new RejectedExecutionException("Work queue full.");
        }
    } else throw new IllegalStateException("StandardThreadPool not started.");
}
 

public void createExecutor() {
    internalExecutor = true;
    TaskQueue taskqueue = new TaskQueue();
    TaskThreadFactory tf = new TaskThreadFactory(getName() + "-exec-", daemon, getThreadPriority());
    executor = new ThreadPoolExecutor(getMinSpareThreads(), getMaxThreads(), 60, TimeUnit.SECONDS,taskqueue, tf);
    taskqueue.setParent( (ThreadPoolExecutor) executor);
}
 

/**
 * Start the component and implement the requirements
 * of {@link org.apache.catalina.util.LifecycleBase#startInternal()}.
 *
 * @exception LifecycleException if this component detects a fatal error
 *  that prevents this component from being used
 */
@Override
protected void startInternal() throws LifecycleException {

    taskqueue = new TaskQueue(maxQueueSize);
    TaskThreadFactory tf = new TaskThreadFactory(namePrefix,daemon,getThreadPriority());
    executor = new ThreadPoolExecutor(getMinSpareThreads(), getMaxThreads(), maxIdleTime, TimeUnit.MILLISECONDS,taskqueue, tf);
    executor.setThreadRenewalDelay(threadRenewalDelay);
    if (prestartminSpareThreads) {
        executor.prestartAllCoreThreads();
    }
    taskqueue.setParent(executor);

    setState(LifecycleState.STARTING);
}
 

@Override
public void execute(Runnable command) {
    if ( executor != null ) {
        try {
            executor.execute(command);
        } catch (RejectedExecutionException rx) {
            //there could have been contention around the queue
            if ( !( (TaskQueue) executor.getQueue()).force(command) ) throw new RejectedExecutionException("Work queue full.");
        }
    } else throw new IllegalStateException("StandardThreadPool not started.");
}
 

public void createExecutor() {
    internalExecutor = true;
    TaskQueue taskqueue = new TaskQueue();
    TaskThreadFactory tf = new TaskThreadFactory(getName() + "-exec-", daemon, getThreadPriority());
    executor = new ThreadPoolExecutor(getMinSpareThreads(), getMaxThreads(), 60, TimeUnit.SECONDS,taskqueue, tf);
    taskqueue.setParent( (ThreadPoolExecutor) executor);
}