- Adding properties to a received message 2007-07-18 - By joshiashutosh
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Hi,
I am using Jboss Messaging for my project. One of my requirements is that I
wish to add some properties to the message received from one queue and put it
on another queue.
The problem is that properties of a received message are read-only and adding
properties gives a MessageNotWriteableException.
The two ways I can think of, of dealing with this problem are:
1. Create a new message, copy all properties of the old message to the new
message and then add new properties as follows:
ObjectMessage newMessage = null;
String name = null;
Object value = null;
try {
newMessage = producerSession.createObjectMessage();
Enumeration propNames = message.getPropertyNames();
while (propNames.hasMoreElements()) {
name = propNames.nextElement();
value = message.getObjectProperty(name);
newMessage.setObjectProperty(name, value);
}
}
catch (JMSException jmse) {
logger.warn("Unable to set message property " + name + " !");
}
message = null;
message = newMessage;
2. Save the message properties (say, in a hash), call clearProperties, put the
properties back and add the new properties.
Is there a better way of adding properties? If not, which of the above methods
is better?
Thanks,
--Ashutosh
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