[hibernate-dev] HSEARCH-761 & JMS backends

[Sanne Grinovero]

Hello all,
With HSEARCH-761 each index can be configured with a separate backend;
one possible configuration is a "multi-master" in which LuceneWork
operations related to different indexes are sent to different
backends, possibly on different cluster nodes but not necessarily.

So while before the "target index" was part of the message as it could
be inferred from the operations and involved indexed classes, now it's
a metadata attached to the message as a receiving backend could assume
that all operations it receives need to be applied and the only index
it's managing, but I still want to transmit it so that a single
backend will still optionally be able to handle multiple indexes, as
it did before.

Different backends are mapped by the index name, eventually with a
shard postfix, so I need to label the messages with a String for the
receiver to know how to deal with them.
Shall I attach this as a JMS "stringProperty", or shall I encode it as
part of the payload?
I think it should be a property so that people can deal with it in
flexible "JMS ways", but I'm not sure. Both strategies are easy to
implement.

Regards,
Sanne