Package akka.dispatch
Interface QueueBasedMessageQueue
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- All Superinterfaces:
MessageQueue
,MultipleConsumerSemantics
- All Known Subinterfaces:
BoundedControlAwareMessageQueueSemantics
,BoundedDequeBasedMessageQueue
,BoundedQueueBasedMessageQueue
,ControlAwareMessageQueueSemantics
,DequeBasedMessageQueue
,UnboundedControlAwareMessageQueueSemantics
,UnboundedDequeBasedMessageQueue
,UnboundedQueueBasedMessageQueue
- All Known Implementing Classes:
BoundedControlAwareMailbox.MessageQueue
,BoundedDequeBasedMailbox.MessageQueue
,BoundedMailbox.MessageQueue
,BoundedPriorityMailbox.MessageQueue
,BoundedStablePriorityMailbox.MessageQueue
,UnboundedControlAwareMailbox.MessageQueue
,UnboundedDequeBasedMailbox.MessageQueue
,UnboundedMailbox.MessageQueue
,UnboundedPriorityMailbox.MessageQueue
,UnboundedStablePriorityMailbox.MessageQueue
public interface QueueBasedMessageQueue extends MessageQueue, MultipleConsumerSemantics
A QueueBasedMessageQueue is a MessageQueue backed by a java.util.Queue.
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description void
cleanUp(ActorRef owner, MessageQueue deadLetters)
Called when the mailbox this queue belongs to is disposed of.boolean
hasMessages()
Indicates whether this queue is non-empty.int
numberOfMessages()
Should return the current number of messages held in this queue; may always return 0 if no other value is available efficiently.java.util.Queue<Envelope>
queue()
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Methods inherited from interface akka.dispatch.MessageQueue
dequeue, enqueue
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Method Detail
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cleanUp
void cleanUp(ActorRef owner, MessageQueue deadLetters)
Description copied from interface:MessageQueue
Called when the mailbox this queue belongs to is disposed of. Normally it is expected to transfer all remaining messages into the dead letter queue which is passed in. The owner of this MessageQueue is passed in if available (e.g. for creating DeadLetters()), “/deadletters” otherwise.Note that we implement the method in a recursive manner mainly for atomicity (not touching the queue twice).
- Specified by:
cleanUp
in interfaceMessageQueue
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hasMessages
boolean hasMessages()
Description copied from interface:MessageQueue
Indicates whether this queue is non-empty.- Specified by:
hasMessages
in interfaceMessageQueue
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numberOfMessages
int numberOfMessages()
Description copied from interface:MessageQueue
Should return the current number of messages held in this queue; may always return 0 if no other value is available efficiently. Do not use this for testing for presence of messages, usehasMessages
instead.- Specified by:
numberOfMessages
in interfaceMessageQueue
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queue
java.util.Queue<Envelope> queue()
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