How can I send message to user?

[vincentchun]

For example, I have three users.
user1 = Vincent
user2 = David
user3 = John

How can I send message from user1 to user2?
(but user3 cannot receive that message)

Use Topic or Queue?
and how to do that?

[stephanenicoll]

I don't really understand what 'user' means but if it a simple ID you can use a JMS header for that

add a JMS property:

msg.setStringProperty("recipientId", "Vincent");

Then the MDB that gets message from Vicent can use a message selector:

"recipientId = 'Vincent'";
(if you have a standalone client, message selector can be specified when creating your queue receiver.

Hope it helps.

Regards,

Stephane

[vincentchun]

Thanks for your help!

I can solve my problem with your solution.