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List:       activemq-dev
Subject:    Re: help needed regarding to org.activemq.network.jms package
From:       Rob Davies <rajdavies () gmail ! com>
Date:       2006-02-01 18:14:55
Message-ID: 858DA9C9-4AF0-4465-BB52-BDCBCB1E6636 () gmail ! com
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hi Fan Li,

ok - will try and get in the next release

cheers,

Rob
On 1 Feb 2006, at 18:00, Li, Fan wrote:

> Hi Rob:
>
> I have opened an issue at http://jira.activemq.org/jira/browse/AMQ  
> and the Key for the issue is AMQ-520. Based on the current code for  
> the JmsConnector and its subclasses, I think what is needed is  
> probably two JndiTemplate objects, one for creating Foreign  
> ConnectionFactory and one for creating Local ConnectionFactory.
>
> Fan
>
> -----Original Message-----
> From: Rob Davies [mailto:rajdavies@gmail.com]
> Sent: Wednesday, February 01, 2006 5:35 AM
> Cc: Li, Fan; activemq-dev@geronimo.apache.org
> Subject: Re: help needed regarding to org.activemq.network.jms package
>
> Fan Li,
>
>
> you can explicitly set the local ConnectionFactory on the  
> JmsTopicConnector/JmsQueueConnector - and use the JndiTemplate for  
> initializing the foreign JMS provider.
> The JmsMessageConvertor doc is misleading  in it's description -  
> for inbound messages it will expect foreign JMS -> ActiveMQ and  
> outbound ActiveMQ -> JMS.
> The JMS specification states that a JMS message provider should be  
> able to convert a foreign JMS Message if one is used - so this  
> interface is only there if special marshaling is required.
>
> cheers,
>
> Rob
>
>
> On 1 Feb 2006, at 12:55, Rob Davies wrote:
>
>> Hi Fan Li,
>>
>> it's great to get some feedback on this!
>> I'm sure we can fix your issues pretty quickly. Would you mind  
>> raising
>> a jira issue on this ? That way I won't forget about
>>
>> cheers,
>>
>> Rob
>>
>> First of all, my apologies for spamming your e-mail account, but I am
>> looking for help from any ActiveMQ developer who can help me answer a
>> couple of questions.
>>
>> I am currently working on a Project that would help our company to
>> switch our existing messaging applications to used ActiveMQ  
>> instead of
>> our own messaging system that is based on Rendezvous. My project has
>> to do with creating a bridge that enables the communication of
>> applications written using our messaging system to those applications
>> written using ActiveMQ.  After looking at ActiveMQ source code, I
>> discovered a package, org.activemq.network.jms in the
>> activemq-core/src/main/java directory, and it seems to provide the
>> bridge functionalities I am looking for. However, when I was  
>> trying to
>> test out the code in this package I run into a problem.
>>
>> The init() method in JmsTopicConnector class calls the methods
>> initializeForeignTopicConnection() and
>> initializeLocalTopicConnection() to set the appropriate
>> ConnectionFactory and Connection by look them up from the  
>> JndiTemplate
>> object of the class. The JndiTemplate object does object lookup using
>> a Context object that is created by the implementation of
>> InitialContextFactroy associated with "
>> java.naming.factory.initial". This is a problem because different JMS
>> implementations have different InitialContextFactory classes,
>> therefore it is not possible for one implementation of
>> InitialContextFactory to create Context object that is capable of
>> looking up objects implemented by two different JMS providers.
>> Unless the association between " java.naming.factory.initial" and the
>> InitialContextFactory can be changed between the invocation of
>> initializeForeignTopicConnection() and
>> initializeLocalTopicConnection(), which would require code change in
>> the JmsTopicConnector class. Does anyone know a way to work around
>> this problem?
>>
>> Also, I need a bit of clarification on the description for the
>> JmsMesageConvertor interface. The Java doc for the convert method of
>> this interface says that the method is used to "Convert a foreign JMS
>> Message to a native ActiveMQ Message", but should it also be used to
>> perform the reverse conversion, which is to convert from a native
>> ActiveMQ Message to a foreign JMS Message or is there a different
>> interface that takes care of it?
>>
>> Thank you
>>
>> Fan Li


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