org.apache.cassandra.concurrent

Class DebuggableScheduledThreadPoolExecutor

java.lang.Object

java.util.concurrent.AbstractExecutorService

java.util.concurrent.ThreadPoolExecutor

java.util.concurrent.ScheduledThreadPoolExecutor

org.apache.cassandra.concurrent.DebuggableScheduledThreadPoolExecutor

All Implemented Interfaces:

java.util.concurrent.Executor, java.util.concurrent.ExecutorService, java.util.concurrent.ScheduledExecutorService

public class DebuggableScheduledThreadPoolExecutor
extends java.util.concurrent.ScheduledThreadPoolExecutor

Like DebuggableThreadPoolExecutor, DebuggableScheduledThreadPoolExecutor always logs exceptions from the tasks it is given, even if Future.get is never called elsewhere. DebuggableScheduledThreadPoolExecutor also catches exceptions during Task execution so that they don't supress subsequent invocations of the task. Finally, there is a special rejected execution handler for tasks rejected during the shutdown hook. For fire and forget tasks (like ref tidy) we can safely ignore the exceptions. For any callers that care to know their task was rejected we cancel passed task.

Nested Class Summary

Nested classes/interfaces inherited from class java.util.concurrent.ThreadPoolExecutor

java.util.concurrent.ThreadPoolExecutor.AbortPolicy, java.util.concurrent.ThreadPoolExecutor.CallerRunsPolicy, java.util.concurrent.ThreadPoolExecutor.DiscardOldestPolicy, java.util.concurrent.ThreadPoolExecutor.DiscardPolicy

Field Summary

Fields

Modifier and Type	Field and Description
static java.util.concurrent.RejectedExecutionHandler	rejectedExecutionHandler

Constructor Summary

Constructors

Constructor and Description
DebuggableScheduledThreadPoolExecutor(int corePoolSize, java.lang.String threadPoolName, int priority)
DebuggableScheduledThreadPoolExecutor(int corePoolSize, java.util.concurrent.ThreadFactory threadFactory)
DebuggableScheduledThreadPoolExecutor(java.lang.String threadPoolName)

Method Summary

Modifier and Type	Method and Description
void	afterExecute(java.lang.Runnable r, java.lang.Throwable t)
java.util.concurrent.ScheduledFuture<?>	scheduleAtFixedRate(java.lang.Runnable command, long initialDelay, long period, java.util.concurrent.TimeUnit unit)
java.util.concurrent.ScheduledFuture<?>	scheduleWithFixedDelay(java.lang.Runnable command, long initialDelay, long delay, java.util.concurrent.TimeUnit unit)

Methods inherited from class java.util.concurrent.ScheduledThreadPoolExecutor

decorateTask, decorateTask, execute, getContinueExistingPeriodicTasksAfterShutdownPolicy, getExecuteExistingDelayedTasksAfterShutdownPolicy, getQueue, getRemoveOnCancelPolicy, schedule, schedule, setContinueExistingPeriodicTasksAfterShutdownPolicy, setExecuteExistingDelayedTasksAfterShutdownPolicy, setRemoveOnCancelPolicy, shutdown, shutdownNow, submit, submit, submit

Methods inherited from class java.util.concurrent.ThreadPoolExecutor

allowCoreThreadTimeOut, allowsCoreThreadTimeOut, awaitTermination, beforeExecute, finalize, getActiveCount, getCompletedTaskCount, getCorePoolSize, getKeepAliveTime, getLargestPoolSize, getMaximumPoolSize, getPoolSize, getRejectedExecutionHandler, getTaskCount, getThreadFactory, isShutdown, isTerminated, isTerminating, prestartAllCoreThreads, prestartCoreThread, purge, remove, setCorePoolSize, setKeepAliveTime, setMaximumPoolSize, setRejectedExecutionHandler, setThreadFactory, terminated, toString

Methods inherited from class java.util.concurrent.AbstractExecutorService

invokeAll, invokeAll, invokeAny, invokeAny, newTaskFor, newTaskFor

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.concurrent.ExecutorService

awaitTermination, invokeAll, invokeAll, invokeAny, invokeAny, isShutdown, isTerminated

Field Detail

rejectedExecutionHandler

public static final java.util.concurrent.RejectedExecutionHandler rejectedExecutionHandler

Constructor Detail

DebuggableScheduledThreadPoolExecutor

public DebuggableScheduledThreadPoolExecutor(int corePoolSize,
                                             java.lang.String threadPoolName,
                                             int priority)

DebuggableScheduledThreadPoolExecutor

public DebuggableScheduledThreadPoolExecutor(int corePoolSize,
                                             java.util.concurrent.ThreadFactory threadFactory)

DebuggableScheduledThreadPoolExecutor

public DebuggableScheduledThreadPoolExecutor(java.lang.String threadPoolName)

Method Detail

afterExecute

public void afterExecute(java.lang.Runnable r,
                         java.lang.Throwable t)

Overrides:

afterExecute in class java.util.concurrent.ThreadPoolExecutor

scheduleAtFixedRate

public java.util.concurrent.ScheduledFuture<?> scheduleAtFixedRate(java.lang.Runnable command,
                                                                   long initialDelay,
                                                                   long period,
                                                                   java.util.concurrent.TimeUnit unit)

Specified by:

scheduleAtFixedRate in interface java.util.concurrent.ScheduledExecutorService

Overrides:

scheduleAtFixedRate in class java.util.concurrent.ScheduledThreadPoolExecutor

scheduleWithFixedDelay

public java.util.concurrent.ScheduledFuture<?> scheduleWithFixedDelay(java.lang.Runnable command,
                                                                      long initialDelay,
                                                                      long delay,
                                                                      java.util.concurrent.TimeUnit unit)

Specified by:

scheduleWithFixedDelay in interface java.util.concurrent.ScheduledExecutorService

Overrides:

scheduleWithFixedDelay in class java.util.concurrent.ScheduledThreadPoolExecutor