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=per #15457 Correlate persistAsync handlers with journal messages

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We have assumed that the handlers can be popped when replies come back from journal, but if messages to journal are in flight when the actor is restarted the handlers does not match up with journal replies.

This solution ignores journal replies that were emitted by an old PersistentActor instance
by passing an uid with the journal messages. This means that the handler will not be
invoked for such messages.

(cherry picked from commit 7ebaaab669c9e467a1ffb4d9ed8b6500e1801a7c)

Conflicts:
	akka-persistence/src/main/scala/akka/persistence/JournalProtocol.scala
	akka-persistence/src/main/scala/akka/persistence/Processor.scala
	akka-persistence/src/main/scala/akka/persistence/journal/AsyncWriteJournal.scala
This commit is contained in:
Patrik Nordwall 2014-06-26 17:35:46 +02:00
parent 33c7f6bb4f
commit 8eec3f92d3
11 changed files with 126 additions and 56 deletions
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10
akka-docs/rst/java/lambda-persistence.rst
View file

@ -214,9 +214,13 @@ The ordering between events is still guaranteed ("evt-b-1" will be sent after "e
In order to implement the pattern known as "*command sourcing*" simply ``persistAsync`` all incoming events right away,
and handle them in the callback.
.. warning::
The callback will not be invoked if the actor is restarted (or stopped) in between the call to
``persistAsync`` and the journal has confirmed the write.
.. _defer-java-lambda:
Deferring actions until preceeding persist handlers have executed
Deferring actions until preceding persist handlers have executed
-----------------------------------------------------------------
Sometimes when working with ``persistAsync`` you may find that it would be nice to define some actions in terms of
@ -234,6 +238,10 @@ of the command for which this ``defer`` handler was called.
.. includecode:: ../../../akka-samples/akka-sample-persistence-java-lambda/src/main/java/doc/LambdaPersistenceDocTest.java#defer-caller
.. warning::
The callback will not be invoked if the actor is restarted (or stopped) in between the call to
``defer`` and the journal has processed and confirmed all preceding writes.
Batch writes
------------

10
akka-docs/rst/java/persistence.rst
View file

@ -218,10 +218,14 @@ The ordering between events is still guaranteed ("evt-b-1" will be sent after "e
.. note::
In order to implement the pattern known as "*command sourcing*" simply ``persistAsync`` all incoming events right away,
and handle them in the callback.
.. warning::
The callback will not be invoked if the actor is restarted (or stopped) in between the call to
``persistAsync`` and the journal has confirmed the write.
.. _defer-java:
Deferring actions until preceeding persist handlers have executed
Deferring actions until preceding persist handlers have executed
-----------------------------------------------------------------
Sometimes when working with ``persistAsync`` you may find that it would be nice to define some actions in terms of
@ -239,6 +243,10 @@ of the command for which this ``defer`` handler was called.
.. includecode:: code/docs/persistence/PersistenceDocTest.java#defer-caller
.. warning::
The callback will not be invoked if the actor is restarted (or stopped) in between the call to
``defer`` and the journal has processed and confirmed all preceding writes.
Batch writes
------------

2
akka-docs/rst/java/routing.rst
View file

@ -536,7 +536,7 @@ Managagement Messages
These management messages may be handled after other messages, so if you send ``AddRoutee`` immediately followed
an ordinary message you are not guaranteed that the routees have been changed when the ordinary message
is routed. If you need to know when the change has been applied you can send ``AddRoutee`` followed by ``GetRoutees``
and when you receive the ``Routees`` reply you know that the preceeding change has been applied.
and when you receive the ``Routees`` reply you know that the preceding change has been applied.
.. _resizable-routers-java: