groovyx.gpars.actor.impl
Class MessageStream

java.lang.Object
  groovyx.gpars.serial.WithSerialId
      groovyx.gpars.actor.impl.MessageStream

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

Actor, DataCallback, DataFlowExpression.DataFlowExpressionsCollector, MessageStream.RemoteMessageStream, MessageStream.ResultWaiter

public abstract class MessageStream
extends WithSerialId

Represents a stream of messages and forms the base class for actors

Author:

Alex Tkachman, Vaclav Pech, Dierk Koenig

See Also:

Serialized Form

Nested Class Summary

static class	MessageStream.RemoteMessageStream
private static class	MessageStream.ResultWaiter<V> Represents a pending request for a reply from an actor.
static class	MessageStream.SendTo

Field Summary

private static long

serialVersionUID

Fields inherited from class groovyx.gpars.serial.WithSerialId

serialHandle

Constructor Summary

MessageStream()

Method Summary

<T> MessageStream	call(T message) Same as send
java.lang.Class<MessageStream.RemoteMessageStream>	getRemoteClass() Class of remote object to be created
<T> MessageStream	leftShift(T message) Same as send
(package private) static void	reInterrupt()
MessageStream	send() Convenience method for send(new Object()).
abstract MessageStream	send(java.lang.Object message) Send message to stream and return immediately
<T> MessageStream	send(T message, MessageStream replyTo) Send message to stream and return immediately.
<T,V> V	sendAndWait(T message) Sends a message and waits for a reply.
<T> java.lang.Object	sendAndWait(T message, groovy.time.Duration duration) Sends a message and waits for a reply.
<T> java.lang.Object	sendAndWait(T message, long timeout, java.util.concurrent.TimeUnit units) Sends a message and waits for a reply.

Methods inherited from class groovyx.gpars.serial.WithSerialId

createRemoteHandle, getOrCreateSerialHandle, writeReplace

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

Constructor Detail

MessageStream

public MessageStream()

Method Detail

send

public abstract MessageStream send(java.lang.Object message)

Send message to stream and return immediately

Parameters:

message - message to send

Returns:

always return message stream itself

send

public final MessageStream send()

Convenience method for send(new Object()).

Returns:

always return message stream itself

send

public final <T> MessageStream send(T message,
                                    MessageStream replyTo)

Send message to stream and return immediately. Allows to specify an arbitrary actor to send replies to. By default replies are sent to the originator (sender) of each message, however, when a different actor is specified as the optional second argument to the send() method, this supplied actor will receive the replies instead.

Type Parameters:

T - type of message accepted by the stream

Parameters:

message - message to send

replyTo - where to send reply

Returns:

always return message stream itself

leftShift

public final <T> MessageStream leftShift(T message)

Same as send

Parameters:

message - to send

Returns:

original stream

call

public final <T> MessageStream call(T message)

Same as send

Parameters:

message - to send

Returns:

original stream

sendAndWait

public final <T,V> V sendAndWait(T message)
                    throws java.lang.InterruptedException

Sends a message and waits for a reply. Returns the reply or throws an IllegalStateException, if the target actor cannot reply.

Parameters:

message - message to send

Returns:

The message that came in reply to the original send.

Throws:

java.lang.InterruptedException - if interrupted while waiting

sendAndWait

public final <T> java.lang.Object sendAndWait(T message,
                                              long timeout,
                                              java.util.concurrent.TimeUnit units)
                                   throws java.lang.InterruptedException

Sends a message and waits for a reply. Timeouts after the specified timeout. In case of timeout returns null. Returns the reply or throws an IllegalStateException, if the target actor cannot reply.

Parameters:

message - message to send

timeout - timeout

units - units

Returns:

The message that came in reply to the original send.

Throws:

java.lang.InterruptedException - if interrupted while waiting

sendAndWait

public final <T> java.lang.Object sendAndWait(T message,
                                              groovy.time.Duration duration)
                                   throws java.lang.InterruptedException

Sends a message and waits for a reply. Timeouts after the specified timeout. In case of timeout returns null. Returns the reply or throws an IllegalStateException, if the target actor cannot reply.

Parameters:

message - message to send

duration - timeout

Returns:

The message that came in reply to the original send.

Throws:

java.lang.InterruptedException - if interrupted while waiting

getRemoteClass

public java.lang.Class<MessageStream.RemoteMessageStream> getRemoteClass()

Description copied from class: WithSerialId

Class of remote object to be created

Overrides:

getRemoteClass in class WithSerialId

Returns:

Throws UnsupportedOperationException

reInterrupt

static void reInterrupt()
                 throws java.lang.InterruptedException

Throws:

java.lang.InterruptedException