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kwin pushed a commit to branch master
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The following commit(s) were added to refs/heads/master by this push:
new 8c15ad4 clarify event admin based resource observation even further
8c15ad4 is described below
commit 8c15ad4be51dd97651add64e9122322bcd552f81
Author: Konrad Windszus <[email protected]>
AuthorDate: Tue Nov 21 15:59:55 2017 +0100
clarify event admin based resource observation even further
---
src/main/jbake/content/documentation/the-sling-engine/resources.md | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/src/main/jbake/content/documentation/the-sling-engine/resources.md
b/src/main/jbake/content/documentation/the-sling-engine/resources.md
index 13c3c41..05f612e 100644
--- a/src/main/jbake/content/documentation/the-sling-engine/resources.md
+++ b/src/main/jbake/content/documentation/the-sling-engine/resources.md
@@ -164,7 +164,11 @@ Certain properties can be used to restrict subscription to
only a subset of even
### OSGi Event Admin
-Resource events are sent out via the OSGi Event Admin. You can subscribe to
those event by registering an OSGi service for
[`org.osgi.service.event.EventHandler`][8]. Several properties should be used
to restrict the subscription to only the relevant event. The event topics which
are used for resources are listed as constants in
[`org.apache.sling.api.SlingConstants`][9] starting with the prefix `TOPIC_`.
You receive events no matter whether they originate from the local repository
or fr [...]
+Resource events are sent out via the OSGi Event Admin. You can subscribe to
those event by registering an OSGi service for
[`org.osgi.service.event.EventHandler`][8]. Several properties should be used
to restrict the subscription to only the relevant event. The event topics which
are used for resources are listed as constants in
[`org.apache.sling.api.SlingConstants`][9] starting with the prefix `TOPIC_`.
+
+You receive events no matter whether they originate from the local repository
or from a remote clustered repository. You can check though in your event
listener for the [event attribute
`event.application`](/apache-sling-eventing-and-job-handling.html#basic-principles),
which is only set in case the event was triggered from an external resource
modification (compare with
[`DEAConstants`](https://sling.apache.org/apidocs/sling9/org/apache/sling/event/dea/DEAConstants.html)
and try to reus [...]
+
+The OSGi event handlers may be [blacklisted by Apache
Felix](http://felix.apache.org/documentation/subprojects/apache-felix-event-admin.html#configuration)
in case the processing takes too long. Therefore dispatch all long-lasting
operations to a new thread or start a new Sling Job.
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