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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0; padding-top: 10px"> <span class="diffcontext">Proposal a): use of JMS messaging<br /><br />I believe most correct solution would be incorporating messaging here:<br /><br />Each</span> <span class="diffaddedchars" style="background-color:#ddfade;"> REST call (</span> <span class="diffcontext"> push message</span> <span class="diffaddedchars" style="background-color:#ddfade;">)</span> <span class="diffcontext"> would produce many</span> <span class="diffaddedchars" style="background-color:#ddfade;"> push notification</span> <span class="diffcontext"> messages - one message (JMS) for each installation that should be notified.<br /><br />Each push notification would be then send in own transaction (which would also satisfy persistence of the message for fail-over purposes).<br /><br />In push notification transaction:<br />- the notification sending would either succeed (confirmed by push network)<br />- rejected by push network (rejected with given outcome - e.g. invalid endpoint/installation) -> acted upon specifically based on outcome<br />- fail/timeout -> marked for redelivery<br /><br />(use of CompletionListener#onCompletion / #onException handling)<br /><br />At the end, onCompletion/onException listener would increment counter of delivered messages - the correct solution is up to discussion here, but I can see Infinispan (at least its ruby-client) is able to count messages atomically (https://github.com/infinispan/ruby-client/issues/1).<br /><br />----<br /><br />There may be other solutions like batches with database transactions, but I believe this is conceptually most clear.</span>
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