groovyx.gpars.actor

Class BlockingActor

java.lang.Object

groovyx.gpars.serial.WithSerialId

groovyx.gpars.actor.impl.MessageStream

groovyx.gpars.actor.Actor

groovyx.gpars.actor.impl.ReplyingMessageStream

groovyx.gpars.actor.impl.SequentialProcessingActor

groovyx.gpars.actor.BlockingActor

All Implemented Interfaces:

java.io.Serializable, java.lang.Runnable

Direct Known Subclasses:

RunnableBackedBlockingActor

public abstract class BlockingActor
extends SequentialProcessingActor

Author:

Vaclav Pech, Alex Tkachman, Dierk Koenig

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class groovyx.gpars.actor.impl.MessageStream

MessageStream.RemoteMessageStream, MessageStream.SendTo

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	AN_ACTOR_CAN_ONLY_RECEIVE_ONE_MESSAGE_AT_A_TIME
private static long	serialVersionUID
private static java.lang.String	THE_ACTOR_HAS_BEEN_STOPPED
private static java.lang.String	THE_ACTOR_HAS_NOT_BEEN_STARTED

Fields inherited from class groovyx.gpars.actor.impl.SequentialProcessingActor

S_ACTIVE_MASK, S_FINISHED_MASK, S_FINISHING_MASK, S_NOT_STARTED, S_RUNNING, S_STOP_TERMINATE_MASK, S_STOPPED, S_STOPPING, S_TERMINATED, S_TERMINATING, stopFlag, stopFlagUpdater

Fields inherited from class groovyx.gpars.actor.Actor

ACTOR_HAS_ALREADY_BEEN_STARTED, CANNOT_SEND_REPLIES_NO_SENDER_HAS_BEEN_REGISTERED, currentThread, parallelGroup, START_MESSAGE, STOP_MESSAGE, TERMINATE_MESSAGE, TIMEOUT, TIMEOUT_MESSAGE, timer

Fields inherited from class groovyx.gpars.serial.WithSerialId

serialHandle

Constructor Summary

Constructors

Constructor and Description
BlockingActor()

Method Summary

Modifier and Type	Method and Description
private void	checkStoppedFlags()
private java.lang.Object	enhanceAndUnwrap(ActorMessage message)
private void	enhanceReplies(ActorMessage message) Adds reply and replyIfExists methods to the current Actor and the message.
protected void	handleStart()
protected void	receive(groovy.lang.Closure handler) Retrieves a message from the message queue, waiting, if necessary, for a message to arrive.
protected void	receive(groovy.time.Duration duration, groovy.lang.Closure handler) Retrieves a message from the message queue, waiting, if necessary, for a message to arrive.
protected void	receive(long timeout, java.util.concurrent.TimeUnit timeUnit, groovy.lang.Closure handler) Retrieves a message from the message queue, waiting, if necessary, for a message to arrive.
protected java.lang.Object	receiveImpl() Retrieves a message from the message queue, waiting, if necessary, for a message to arrive.
protected java.lang.Object	receiveImpl(long timeout, java.util.concurrent.TimeUnit units) Retrieves a message from the message queue, waiting, if necessary, for a message to arrive.

Methods inherited from class groovyx.gpars.actor.impl.SequentialProcessingActor

act, checkStopTerminate, handleTermination, hasBeenStopped, isActive, pollMessage, receive, receive, receive, run, send, setParallelGroup, silentStart, start, stop, sweepNextMessage, takeMessage, takeMessage, terminate

Methods inherited from class groovyx.gpars.actor.impl.ReplyingMessageStream

getSender, reply, replyIfExists, setSender

Methods inherited from class groovyx.gpars.actor.Actor

createActorMessage, createRemoteHandle, deregisterCurrentActorWithThread, getJoinLatch, getParallelGroup, handleException, handleInterrupt, handleTimeout, isActorThread, join, join, join, join, onStop, registerCurrentActorWithThread, sendAndContinue, sendAndPromise, sweepQueue, threadBoundActor

Methods inherited from class groovyx.gpars.actor.impl.MessageStream

call, getRemoteClass, leftShift, send, send, sendAndWait, sendAndWait, sendAndWait

Methods inherited from class groovyx.gpars.serial.WithSerialId

getOrCreateSerialHandle, writeReplace

Methods inherited from class java.lang.Object

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

Field Detail

THE_ACTOR_HAS_NOT_BEEN_STARTED

private static final java.lang.String THE_ACTOR_HAS_NOT_BEEN_STARTED

See Also:

Constant Field Values

THE_ACTOR_HAS_BEEN_STOPPED

private static final java.lang.String THE_ACTOR_HAS_BEEN_STOPPED

See Also:

Constant Field Values

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

AN_ACTOR_CAN_ONLY_RECEIVE_ONE_MESSAGE_AT_A_TIME

public static final java.lang.String AN_ACTOR_CAN_ONLY_RECEIVE_ONE_MESSAGE_AT_A_TIME

See Also:

Constant Field Values

Constructor Detail

BlockingActor

public BlockingActor()

Method Detail

enhanceReplies

private void enhanceReplies(ActorMessage message)

Adds reply and replyIfExists methods to the current Actor and the message. These methods will call send on the target actor (the sender of the original message). The reply/replyIfExists methods invoked on the actor will be sent to all currently processed messages, reply/replyIfExists invoked on a message will send a reply to the sender of that particular message only.

Parameters:

message - The original message

receiveImpl

protected final java.lang.Object receiveImpl()
                                      throws java.lang.InterruptedException

Retrieves a message from the message queue, waiting, if necessary, for a message to arrive.

Specified by:

receiveImpl in class SequentialProcessingActor

Returns:

The message retrieved from the queue.

Throws:

java.lang.InterruptedException - If the thread is interrupted during the wait. Should propagate up to stop the thread.

receiveImpl

protected final java.lang.Object receiveImpl(long timeout,
                                             java.util.concurrent.TimeUnit units)
                                      throws java.lang.InterruptedException

Retrieves a message from the message queue, waiting, if necessary, for a message to arrive.

Specified by:

receiveImpl in class SequentialProcessingActor

Parameters:

timeout - how long to wait before giving up, in units of unit

units - a TimeUnit determining how to interpret the timeout parameter

Returns:

The message retrieved from the queue, or null, if the timeout expires.

Throws:

java.lang.InterruptedException - If the thread is interrupted during the wait. Should propagate up to stop the thread.

enhanceAndUnwrap

private java.lang.Object enhanceAndUnwrap(ActorMessage message)

checkStoppedFlags

private void checkStoppedFlags()

receive

protected final void receive(groovy.lang.Closure handler)
                      throws java.lang.InterruptedException

Retrieves a message from the message queue, waiting, if necessary, for a message to arrive. The message retrieved from the queue is passed into the handler as the only parameter.

Parameters:

handler - A closure accepting the retrieved message as a parameter, which will be invoked after a message is received.

Throws:

java.lang.InterruptedException - If the thread is interrupted during the wait. Should propagate up to stop the thread.

receive

protected final void receive(long timeout,
                             java.util.concurrent.TimeUnit timeUnit,
                             groovy.lang.Closure handler)
                      throws java.lang.InterruptedException

Retrieves a message from the message queue, waiting, if necessary, for a message to arrive. The message retrieved from the queue is passed into the handler as the only parameter. A null value is passed into the handler, if the timeout expires

Parameters:

timeout - how long to wait before giving up, in units of unit

timeUnit - a TimeUnit determining how to interpret the timeout parameter

handler - A closure accepting the retrieved message as a parameter, which will be invoked after a message is received.

Throws:

java.lang.InterruptedException - If the thread is interrupted during the wait. Should propagate up to stop the thread.

receive

protected final void receive(groovy.time.Duration duration,
                             groovy.lang.Closure handler)
                      throws java.lang.InterruptedException

Retrieves a message from the message queue, waiting, if necessary, for a message to arrive. The message retrieved from the queue is passed into the handler as the only parameter. A null value is passed into the handler, if the timeout expires

Parameters:

duration - how long to wait before giving up, in units of unit

handler - A closure accepting the retrieved message as a parameter, which will be invoked after a message is received.

Throws:

java.lang.InterruptedException - If the thread is interrupted during the wait. Should propagate up to stop the thread.

handleStart

protected void handleStart()

Overrides:

handleStart in class Actor