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https://issues.apache.org/jira/browse/SLING-9016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17026582#comment-17026582
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Timothee Maret commented on SLING-9016:
---------------------------------------
Thanks [~ashishc], I merged your PR
[#1|https://github.com/apache/sling-org-apache-sling-distribution-api/pull/1].
> Distribution Event should be generated when the package is dropped
> ------------------------------------------------------------------
>
> Key: SLING-9016
> URL: https://issues.apache.org/jira/browse/SLING-9016
> Project: Sling
> Issue Type: Improvement
> Components: Content Distribution
> Reporter: Ashish Chopra
> Assignee: Timothee Maret
> Priority: Major
> Fix For: Content Distribution Core 0.4.2, Content Distribution
> API 0.4.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> We already have an event corresponding to the successful distribution of a
> package [0].
> In the Distribution Core impl, this event is (correctly) generated when the
> package is successfully distributed [1]. However, if the distribution agent
> has a valid error-strategy associated with it and if the attempts to
> distribute them exceed a fixed number of retries, the packages are moved
> _silently_ to error-queue [2].
> I propose that this asymmetry be addressed.
> Since {{DistributionEventTopics}} is a {{ProviderType}}, it should be
> possible to introduce another constant (which queue-processors in
> Distribution Core, as well as any custom ones) can use to identify failed
> distribution-requests [3].
> Distribution Core can be further enhanced to create this event when it
> re-enqueues the queue-item that has exceeded its retries in the error-queue
> [4].
> [0]
> https://github.com/apache/sling-org-apache-sling-distribution-api/blob/ff4c3ae5b7129ba7b1f4f59d35edf93bf6e3d63f/src/main/java/org/apache/sling/distribution/event/DistributionEventTopics.java#L44
> [1]
> https://github.com/apache/sling-org-apache-sling-distribution-core/blob/537bb57af821f21537cf4a24ad7d2347c6a5dae1/src/main/java/org/apache/sling/distribution/agent/impl/SimpleDistributionAgentQueueProcessor.java#L137-L138
> [2]
> https://github.com/apache/sling-org-apache-sling-distribution-core/blob/537bb57af821f21537cf4a24ad7d2347c6a5dae1/src/main/java/org/apache/sling/distribution/agent/impl/SimpleDistributionAgentQueueProcessor.java#L158-L160
> [3]
> {noformat}
> diff --git
> a/src/main/java/org/apache/sling/distribution/event/DistributionEventTopics.java
>
> b/src/main/java/org/apache/sling/distribution/event/DistributionEventTopics.java
> index 8a75dda..2be0358 100644
> ---
> a/src/main/java/org/apache/sling/distribution/event/DistributionEventTopics.java
> +++
> b/src/main/java/org/apache/sling/distribution/event/DistributionEventTopics.java
> @@ -43,6 +43,10 @@ public interface DistributionEventTopics {
> */
> String AGENT_PACKAGE_DISTRIBUTED = EVENT_BASE +
> "/agent/package/distributed";
> + /**
> + * event for package errored-out
> + */
> + String AGENT_PACKAGE_ERRORED = EVENT_BASE + "/agent/package/errored";
> /**
> * event for package imported
> {noformat}
> [4]
> {noformat}
> diff --git
> a/src/main/java/org/apache/sling/distribution/agent/impl/SimpleDistributionAgentQueueProcessor.java
>
> b/src/main/java/org/apache/sling/distribution/agent/impl/SimpleDistributionAgentQueueProcessor.java
> index 1a04fa7..eba47e9 100644
> ---
> a/src/main/java/org/apache/sling/distribution/agent/impl/SimpleDistributionAgentQueueProcessor.java
> +++
> b/src/main/java/org/apache/sling/distribution/agent/impl/SimpleDistributionAgentQueueProcessor.java
> @@ -157,6 +157,8 @@ class SimpleDistributionAgentQueueProcessor implements
> DistributionQueueProcesso
> if (errorQueueStrategy != null &&
> queueItemStatus.getAttempts() > retryAttempts) {
> removeItemFromQueue =
> reEnqueuePackage(distributionPackage);
> +
> distributionEventFactory.generatePackageEvent(DistributionEventTopics.AGENT_PACKAGE_ERRORED,
> + DistributionComponentKind.AGENT, agentName,
> distributionPackage.getInfo());
> distributionLog.info("[{}] PACKAGE-QUEUED {}:
> distribution package {} was enqueued to an error queue", queueName,
> requestId, distributionPackage.getId());
> }
> }
> {noformat}
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