apache camel removeEndpoints

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用户TonySu在使用Apache Camel动态配置Endpoint时遇到问题，无法完全移除某些类型的Endpoint，如jms:topic。社区成员协助定位了Camel Context中removeEndpoints方法的问题，并提供了修复。

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Problem Removing Endpoints

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Tony Su

Feb 04, 2012; 4:59am

Problem Removing Endpoints

6 posts

This post was updated on Feb 04, 2012; 5:50am.

I'm attempting to manage routes and endpoints in a camel context using following components (Camel 2.9.0, CXF 2.5.1, AMQ 5.5.1 in karaf 2.2.5). I have a system that requires that the endpoints be dynamically reconfigured, and this requires that I be able to add/remove routes and endpoints.

I am able to remove routes from my camel context, but I'm not able to remove all the endpoints. The endpoints are a combination of the following:

1- jms:queue:jmsQueueEP
2 - jms:topic:jmsTopicEP
3 - seda:sedaEP
4 - CxfEndpoint

1 - 3 are added to the context during route creation using RouteBuilder. 4 is explicitly added to the context.

Performing a camelContext.removeEndpoints("*") removes most of the lazy created endpoints. It removes (1) and (3).

Performing an explicit removal of (4) - camelContext.removeEndpoints("cxf: https://foo...") is then able to remove the CxfEndpoint. I'm not sure why the wildcard pattern initially used did not work here.

Finally, even an explicit attempt to remove the jms topic endpoint was not successful:

Collection<Endpoint> removed,
endpoints = camelContext.getEndpoints();

for (Endpoint i : endpoints)
{
String uri = i.getEndpointUri();
logger.debug("removing EP: {}", uri);
removed = camelContext.removeEndpoints(i.getEndpointUri());
if (removed == null)
{
logger.debug("EP not removed: {}", uri);
}
}

Output is:
removing EP: jmsvm://topic:CORE_REQUEST_USRMGM
removing EP: jmsvm://topic:CORE_ADD_USRMGM

This indicates that removeEndpoints should have succeeded, but an examination of the context indicates that the endpoint is still present. Using context.AddRoutes() to add routes with the same endpoints results in duplicate endpoints present in the context.

Any ideas as to:
- Why the wildcard uri pattern fails to remove the cxf endpoint?
- How to remove the jms:topic endpoint?

TIA

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hadrian

Feb 04, 2012; 6:06am

Re: Problem Removing Endpoints

1074 posts

Tony,

I am putting together a unit test to reproduce your problem. I assume
you don't have one handy. The information you provided should be enough
to reproduce.

Hadrian

On 02/03/2012 04:47 PM, Tony Su wrote:

> Found a mistake in the original post:
>
>
> Tony Su wrote
>>
>> if (removed != null)
>> {
>> logger.debug("EP not removed: {}", uri);
>> }
>>
>
>
> This should be:
> if (removed != null)
> {
> logger.debug("EP not removed: {}", uri);
> }
> Output is:
> removing EP: jmsvm://topic:CORE_REQUEST_USRMGM
> removing EP: jmsvm://topic:CORE_ADD_USRMGM
>
> This indicates that removeEndpoints should have succeeded, but an
> examination of the context indicates that the endpoint is still present.
> Using context.AddRoutes() to add routes with the same endpoints results in
> duplicate endpoints present in the context.
>
> --
> View this message in context: http://camel.465427.n5.nabble.com/Problem-Removing-Endpoints-tp5455029p5455127.html
> Sent from the Camel - Users mailing list archive at Nabble.com.

... [ show rest of quote]

--
Hadrian Zbarcea
Principal Software Architect
Talend, Inc
http://coders.talend.com/
http://camelbot.blogspot.com/

Babak Vahdat

Feb 04, 2012; 6:38am

Re: Problem Removing Endpoints

750 posts

In reply to this post by Tony Su

Hi

That was a Javadoc typo as CamelContext.removeEndpoints() would never return null but just an empty Collection if no matching endpoint could be found. So in your case checking it aganist null is obsolete.

I did correct it right before on the trunk.

Babak

Tony Su

Feb 04, 2012; 7:24am

Re: Problem Removing Endpoints

6 posts

Babak Vahdat wrote

Hi

That was a Javadoc typo as CamelContext.removeEndpoints() would never return null but just an empty Collection if no matching endpoint could be found. So in your case checking it aganist null is obsolete.

I did correct it right before on the trunk.

Babak

I just realized that a little while ago while browsing the source :-)

Changing to check for "removed.isEmpty()" ...

Tony Su

Feb 04, 2012; 7:26am

Re: Problem Removing Endpoints

6 posts

In reply to this post by hadrian

hadrian wrote

I am putting together a unit test to reproduce your problem. I assume
you don't have one handy. The information you provided should be enough
to reproduce.

Thanks! I don't have a test case yet.

hadrian

Feb 04, 2012; 7:33am

Re: Problem Removing Endpoints

1074 posts

In reply to this post by Tony Su

Tony,

I did reproduce your problem and created CAMEL-4976 [1]. I also added a
unit test [2] that is consistent with your findings. It doesn'I am
investigating a fix and I expect to have it committed by Monday.

Enjoy the weekend,
Hadrian

[1] https://issues.apache.org/jira/browse/CAMEL-4976
[2]
http://svn.apache.org/viewvc/camel/trunk/tests/camel-itest/src/test/java/org/apache/camel/itest/issues/RemoveEndpointsTest.java?view=markup

On 02/03/2012 04:47 PM, Tony Su wrote: