io.fabric8.utils

Class SerialExecutorService

java.lang.Object

java.util.concurrent.AbstractExecutorService

io.fabric8.utils.SerialExecutorService

All Implemented Interfaces:

Executor, ExecutorService

public class SerialExecutorService
extends AbstractExecutorService

An ExecutorService which ensures serial execution of the Runnable objects which it is asked to execute. By default it delegates execution of those tasks to a thread pool, but can be configured to use any Executor.

Field Summary

Fields

Modifier and Type	Field and Description
protected ThreadLocal<Boolean>	draining
protected Runnable	drainTask
protected ConcurrentLinkedQueue<Runnable>	externalQueue
protected String	label
protected LinkedList<Runnable>	localQueue
protected AtomicBoolean	shutdown
protected Executor	target
protected AtomicBoolean	terminated
protected CountDownLatch	terminatedLatch
protected AtomicBoolean	triggered

Constructor Summary

Constructors

Constructor and Description
SerialExecutorService()
SerialExecutorService(Executor target)
SerialExecutorService(Executor target, String label)
SerialExecutorService(String label)

Method Summary

Modifier and Type	Method and Description
boolean	awaitTermination(long timeout, TimeUnit unit)
void	drain() This method blocks until all previously queued Runnable objects are run.
void	execute(Runnable runnable) Queues the runnable for execution.
void	executeAndDrain(Runnable runnable) Executes the runnable.
String	getLabel()
Executor	getTarget()
boolean	isDraining()
boolean	isShutdown()
boolean	isTerminated()
void	setLabel(String label)
void	setTarget(Executor target)
void	shutdown()
List<Runnable>	shutdownNow()
String	toString()
protected void	triggerDrain()

Methods inherited from class java.util.concurrent.AbstractExecutorService

invokeAll, invokeAll, invokeAny, invokeAny, newTaskFor, newTaskFor, submit, submit, submit

Methods inherited from class java.lang.Object

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

Field Detail

target

protected Executor target

label

protected volatile String label

shutdown

protected AtomicBoolean shutdown

terminated

protected AtomicBoolean terminated

terminatedLatch

protected CountDownLatch terminatedLatch

triggered

protected final AtomicBoolean triggered

externalQueue

protected final ConcurrentLinkedQueue<Runnable> externalQueue

localQueue

protected final LinkedList<Runnable> localQueue

draining

protected final ThreadLocal<Boolean> draining

drainTask

protected final Runnable drainTask

Constructor Detail

SerialExecutorService

public SerialExecutorService()

SerialExecutorService

public SerialExecutorService(String label)

SerialExecutorService

public SerialExecutorService(Executor target)

SerialExecutorService

public SerialExecutorService(Executor target,
                             String label)

Method Detail

execute

public void execute(Runnable runnable)

Queues the runnable for execution.

Parameters:

runnable -

executeAndDrain

public void executeAndDrain(Runnable runnable)

Executes the runnable. This method blocks until it has been executed.

Parameters:

runnable -

triggerDrain

protected void triggerDrain()

drain

public void drain()

This method blocks until all previously queued Runnable objects are run.

shutdown

public void shutdown()

shutdownNow

public List<Runnable> shutdownNow()

isDraining

public boolean isDraining()

isShutdown

public boolean isShutdown()

isTerminated

public boolean isTerminated()

awaitTermination

public boolean awaitTermination(long timeout,
                                TimeUnit unit)
                         throws InterruptedException

Throws:

InterruptedException

toString

public String toString()

Overrides:

toString in class Object

getTarget

public Executor getTarget()

setTarget

public void setTarget(Executor target)

getLabel

public String getLabel()

setLabel

public void setLabel(String label)