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Re: [xmlblaster] Persisent subscriptions/connections

Hi Craig,
for this issue please read the response I sent earlier today to John.


McIlwee, Craig wrote:
I need to get some clarification on the purpose of persistent connections and subscriptions. Up until now I had been under the impression that if I made a persistent subscription and was disconnected from the server for some reason (my client crashed, network went down, etc), upon reconnect my subscription would still exist and I would not have to reissue it. In addition to this, I expected that all messages that I missed while disconnected would be queued for me and I would receive them on reconnect.

Today I tried to test this out by creating a persistent subscription and then pulling my Ethernet cable. Shortly afterward I did a state dump on xmlBlaster and saw that all references to my connection and subscriptions were no longer present. After plugging the cable back in and letting my client reconnect I had no subscriptions.

This is not what I had expected so I jumped onto the xmlBlaster reference book and from what I was reading it looked like persistent connections would only come into play if the xmlBlaster server crashed, not if there was some network disconnect or if the client crashed. Have I been wrong about the use of persistence all along? If so, is there a way for xmlBlaster to queue my messages while Iâm disconnected so that I can receive them on reconnect (and not have to receive everything that I had already gotten)? If I can receive the missed updates only, will I received all updates for a topic or only the most recent?

Thanks in advance,

Craig McIlwee

Open Roads Consulting, Inc.


http://www.openroadsconsulting.com <http://www.openroadsconsulting.com/>