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Share info across different sessions & servers, using Apache

0 votes
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I need to share data between sessions running in different Tomcat server.
I 'd been thinking about using a JMS broker (as ActiveMQ ):

  • when a new session is created in Tomcat A, it's created a new unique topic for this session
  • the session registers itself as listener of that topic ( the only one listener )
  • publish the name of this topic by some way , so it can be found by another session in Tomcat B

I don't know if somebody has used something like this sometime, and how he/she did it
Any suggestion/opinion ?

I'm not sure either use only one topic for all session created or one topic per session ?
I think that one topic per session is more safe because if I use one topic for all sessions, if one message is not read quickly by one consumer (a session ), could block the topic, Obviously , i'll define a TTL for messages/topic

posted Jul 2, 2013 by anonymous

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1 Answer

0 votes

What kind of data do you want to share? Just a view "bytes"? Is there an requirement concerning durability/persistence/performance?
Is this user=session related or do you want to share data in general? Usually if you have a session id the lb will route your user always to the same container? What about session replication, a database, terracotta?

JMS: i doubt this will be working... you need a persistent message or a container started after the change was send will not noticed about it...

answer Jul 2, 2013 by anonymous
I need to share formatted text data ( XML, key/value, ...I'm not sure yet )

I don't understand your comment about JMS . I will use a JMS broker as ActiveMQ . Probably it will be embebbed into the same JVM than Tomcat server. ActiveMQ supports persistent messages.

I could use a database but I don't want to be making polling every X seconds by a session
commented Jul 2, 2013 by anonymous
You don't have to pull any data that the user doesn't need, do you?

If you don't want to use a RDBMS, how about something like memcached? I asked about using memcached a while back on this list and got some other suggestions as well (as memcached doesn't make a great fail-safe shared-data storage system... it's really meant to be more of a cache of data available elsewhere).
commented Jul 2, 2013 by anonymous
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