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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CAMEL-11665) Define a saga DSL and implementation for long running actions
Date Wed, 10 Jan 2018 17:29:00 GMT

    [ https://issues.apache.org/jira/browse/CAMEL-11665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16320686#comment-16320686
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ASF GitHub Bot commented on CAMEL-11665:
----------------------------------------

nicolaferraro commented on a change in pull request #2173: CAMEL-11665: Saga EIP
URL: https://github.com/apache/camel/pull/2173#discussion_r160745873
 
 

 ##########
 File path: camel-core/src/main/java/org/apache/camel/Exchange.java
 ##########
 @@ -170,6 +170,9 @@
     String LOOP_INDEX               = "CamelLoopIndex";
     String LOOP_SIZE                = "CamelLoopSize";
 
+    // Long running action (saga)
+    String SAGA_LONG_RUNNING_ACTION = "Long-Running-Action";
 
 Review comment:
   It could, but setting it to "Long-Running-Action" simplifies things a lot, since that is
the same header used in the Microprofile implementation, so Camel routes would be able to
interoperate naturally with them. So I prefer to stick with that if not an issue.

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> Define a saga DSL and implementation for long running actions
> -------------------------------------------------------------
>
>                 Key: CAMEL-11665
>                 URL: https://issues.apache.org/jira/browse/CAMEL-11665
>             Project: Camel
>          Issue Type: New Feature
>          Components: camel-core
>            Reporter: Nicola Ferraro
>            Assignee: Nicola Ferraro
>            Priority: Minor
>
> I'm trying to define a saga interface and DSL for Camel in order to support long running
actions.
> I've done some experiments here: https://github.com/nicolaferraro/camel/blob/8ad4a4a264bbcd882507893e810a65578253caa4/camel-core/src/test/java/org/apache/camel/processor/SagaTest.java#L102-L146
> The experiment works with a in memory saga manager.
> It should be possible to switch to a proper "long running action coordinator" (e.g. the
one proposed here https://github.com/jbosstm/microprofile-sandbox/blob/0009-LRA/proposals/0009-LRA/0009-LRA.md)
once an implementation is ready.
> We can also think to provide our own implementation based on a shared transaction log,
but it will be a "hard" task and it would not be compatible with other languages/frameworks,
so the "spec" way should be preferable.



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