com.google.appengine.api
Class ThreadManager

java.lang.Object
  com.google.appengine.api.ThreadManager

public final class ThreadManager
extends java.lang.Object

ThreadManager exposes a ThreadFactory that allows App Engine applications to spawn new threads.

Constructor Summary

ThreadManager()

Method Summary

static java.util.concurrent.ThreadFactory	backgroundThreadFactory() Returns a ThreadFactory that will create threads that are independent of the current request.
static java.lang.Thread	createBackgroundThread(java.lang.Runnable runnable) Create a new Thread that executes runnable independent of the current request.
static java.lang.Thread	createThreadForCurrentRequest(java.lang.Runnable runnable) Create a new Thread that executes runnable for the duration of the current request.
static java.util.concurrent.ThreadFactory	currentRequestThreadFactory() Returns a ThreadFactory that will create threads scoped to the current request.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ThreadManager

public ThreadManager()

Method Detail

currentRequestThreadFactory

public static java.util.concurrent.ThreadFactory currentRequestThreadFactory()

Returns a ThreadFactory that will create threads scoped to the current request. These threads will be interrupted at the end of the current request and must complete within the request deadline.

Your code has limited access to the threads created by this ThreadFactory. For example, you can call Thread.setUncaughtExceptionHandler(java.lang.Thread.UncaughtExceptionHandler) and Thread.interrupt(), but not Thread.stop() or any other methods that require RuntimePermission("modifyThread").

Note that calling ThreadFactory.newThread(java.lang.Runnable) on the returned instance may throw any of the unchecked exceptions mentioned by createBackgroundThread(java.lang.Runnable).

createThreadForCurrentRequest

public static java.lang.Thread createThreadForCurrentRequest(java.lang.Runnable runnable)

Create a new Thread that executes runnable for the duration of the current request. Calling this method is equivalent to invoking ThreadFactory#run on the ThreadFactory returned from currentRequestThreadFactory(). This thread will be interrupted at the end of the current request and must complete within the request deadline.

Throws:

ApiProxy.FeatureNotAvailableException - If this application cannot use this feature.

backgroundThreadFactory

public static java.util.concurrent.ThreadFactory backgroundThreadFactory()

Returns a ThreadFactory that will create threads that are independent of the current request.

This ThreadFactory can currently only be used by backends.

Note that calling ThreadFactory.newThread(java.lang.Runnable) on the returned instance may throw any of the unchecked exceptions mentioned by createBackgroundThread(java.lang.Runnable).

createBackgroundThread

public static java.lang.Thread createBackgroundThread(java.lang.Runnable runnable)

Create a new Thread that executes runnable independent of the current request. Calling this method is equivalent to invoking ThreadFactory#run on the ThreadFactory returned from backgroundThreadFactory().

This method can currently only be used by backends.

Throws:

ApiProxy.FeatureNotAvailableException - If this application cannot use this feature.

ApiProxy.CancelledException - If the request was interrupted while creating the new thread.

ApiProxy.ApiDeadlineExceededException - If creation of the new thread took too long.