io.joynr.messaging.persistence

Class NoOpMessagePersister

java.lang.Object

io.joynr.messaging.persistence.NoOpMessagePersister

All Implemented Interfaces:

MessagePersister

public class NoOpMessagePersister
extends Object
implements MessagePersister

Constructor Summary

Constructors

Constructor and Description
NoOpMessagePersister()

Method Summary

Modifier and Type	Method and Description
Set<DelayableImmutableMessage>	fetchAll(String messageQueueId) Fetches all messages from persistence which have not yet been MessagePersister.remove(String,DelayableImmutableMessage).
boolean	persist(String messageQueueId, DelayableImmutableMessage message) Called with the message to be persisted.
void	remove(String messageQueueId, DelayableImmutableMessage message) Called once the message queue has actually processed the message previously added to the persistence by calling MessagePersister.persist(String,DelayableImmutableMessage).

Methods inherited from class java.lang.Object

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

Constructor Detail

NoOpMessagePersister

public NoOpMessagePersister()

Method Detail

persist

public boolean persist(String messageQueueId,
                       DelayableImmutableMessage message)

Description copied from interface: MessagePersister

Called with the message to be persisted. If the implementation does not want to persist the message, it should return false. Implementations of this method can block until the persisting was successful, but be aware that this might impact performance.

Specified by:

persist in interface MessagePersister

Parameters:

messageQueueId - the unique ID of the message queue for which the message is being persisted

message - the message which is a candidate for persisting

Returns:

true if the message is persisted, false if not.

fetchAll

public Set<DelayableImmutableMessage> fetchAll(String messageQueueId)

Description copied from interface: MessagePersister

Fetches all messages from persistence which have not yet been MessagePersister.remove(String,DelayableImmutableMessage). The MessageQueue will call this during startup to fetch any messages which were persisted but not consumed during a previous lifetime of the joynr runtime in order to re-add them to the queue.

Specified by:

fetchAll in interface MessagePersister

Parameters:

messageQueueId - the ID of the message queue for which to fetch the persisted messages.

Returns:

the set of messages which were previously added by the IDed message queue, but were not consumed.

remove

public void remove(String messageQueueId,
                   DelayableImmutableMessage message)

Description copied from interface: MessagePersister

Called once the message queue has actually processed the message previously added to the persistence by calling MessagePersister.persist(String,DelayableImmutableMessage). The implementation of this method should ensure that the message is actually removed from the persistence, and should block until this has been done successfully.

Specified by:

remove in interface MessagePersister

Parameters:

messageQueueId - the ID of the message queue which consumed the message.

message - the message which has been consumed by the queue and should be removed from persistence.