Hi All,
There have been a need for a ListMessage support with JMS particularly
among the folks who are using QMFv2.
We have been exploring several ways of providing this and would like
to solicit feedback from the user community.
Following is a summary of the options.
1. Make the list message accessible via the MapMessage and
StreamMessage interfaces.
The keys in the MapMessage are going to be indices.
if (m instanceof MapMessage) {
MapMessage map = (MapMessage) m;
for (String key : map.getMapNames()) {
Object value = map.getObject(key);
//process value
}
}
One could also access them by position by doing map.getObject("1")
... map.getObject("5") ..etc
2. Make it available as a MapMessage but provide a java.util.List as a
single entry in the map.
for (Object o : (List) map.getObject("map/list"))
{
// Process
}
3. Another option (which can be used along side both the above) is to
introduce a ListMessage interface.
This is for folks who don't mind using a Qpid specific interface.
if (m instanceof ListMessage)
{
for (Object o : m.getList())
{
// Process
}
}
There has been a patch which implements Option #1 and #3 here
https://issues.apache.org/jira/secure/attachment/12519423/0001-java-ListMessage-support.patch
There is a discussion on review board about a patch on Option #2
here https://reviews.apache.org/r/6816/
Please feel free to provide feedback and make known your preferences.
Also please feel free to provide your own approach to tackling the
problem if you feel the above options doesn't address it adequately.
Regards,
Rajith
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