Message selector implemetation for Java

Hi Bernard,
Thanks for your reply.

Let me explain more on the question I have with some example.

e.g. I have single publisher and multiple subscribers. Publisher is publishing person details as data on single topic. Person data contains {firstname, lastname, age, city, county, company} information.
Now there are multiple subscribers who want to get the person data from the same topic but with some message selection on it.. They do not want to listen to all the person data what publisher is publishing. Some subscribers are interested in listening to only person data have city=xxx, where as other subscriber is interested in listening to data with company=xyz.

One of the solution on subscriber side is - to listen to publisher topic and get all data from the topic. then manipulate the data for required condition, say city=xxx. But in this case, the subscriber is also listening to redendent information, and then have to manipulate the received data.
The other solution is to create multiple topics at publisher end to send data with criterias. That will be topic1 for subscriber1. topic2 for subcriber2. But this case leads to bandwidth issue where publisher is sending same/similar data on multiple topics.


So my question is -
is there any way where subscibers can only listen to the data (with certain criteria) to publisher -publishing on single topic. Is there any way we can add this message selectioin on the topics on subscriber end.

Thanks Matthew.
Could be please let us know when is the earliest we can get this implementation added for meesage filtering to Ice?