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From "Barry Oglesby (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GEODE-1471) GatewayEventFilter callbacks are not invoked when an AsyncEventQueues is configured using xml
Date Wed, 01 Jun 2016 16:42:59 GMT

    [ https://issues.apache.org/jira/browse/GEODE-1471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15310606#comment-15310606
] 

Barry Oglesby commented on GEODE-1471:
--------------------------------------

Details from the customer:
{noformat}
We are using the Async queue mechanism when inserting objects into the regions, which is defined
as follows:
<async-event-queue id="myQueue" persistent="false" parallel="true" batch-size="10"
	disk-store-name="queue-overflow" maximum-queue-memory="256">
		<gateway-event-filter>
			<class-name>imdg.listeners.myClassFilter</class-name>
		</gateway-event-filter>
		<gateway-event-substitution-filter>
			<class-name>imdg.listeners.myClassSubstitutionFilter</class-name>
		</gateway-event-substitution-filter>
		<async-event-listener>
			<class-name>imdg.listeners.myClassListener</class-name>
		</async-event-listener>
</async-event-queue>

In gemfire version 8.2,these were the steps for inserting the object to the queue :

- SubstitutionFilter : we are taking the required objects from the event object and return
them as the result to the filter.
- Filter: beforeEnqueue method is invoked and it’s decided if the object will be passed
to the listener. (In our filter classes - if the object is null we are not sending it to the
listener)
- Listener: gets the de-serialized value, processes it puts it in the relevant regions.

Seems like in geode we are not passing through beforeEnqueue method in the Fillter step, and
the null objects are not been filtered.
This means that when there is no object to pass through the queue, still null will be passed,
and in the listener code, when asking for the de-serialized value, we are getting also the
null object, which results in a Null Pointer Exception.

Was anything changed recently in the Async queue mechanism?
{noformat}

> GatewayEventFilter callbacks are not invoked when an AsyncEventQueues is configured using
xml
> ---------------------------------------------------------------------------------------------
>
>                 Key: GEODE-1471
>                 URL: https://issues.apache.org/jira/browse/GEODE-1471
>             Project: Geode
>          Issue Type: Bug
>          Components: wan
>            Reporter: Barry Oglesby
>            Assignee: Barry Oglesby
>
> None of the {{GatewayEventFilter}} callbacks are invoked when configuring {{AsyncEventQueues}}
using xml.



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