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Resuming processes revisited
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created by <a href="https://community.jboss.org/people/r3vans">Richard Evans</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/745059#745059">View the full discussion</a>
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<div class="jive-rendered-content"><p>Firstly apologies for creating a new thread on an oft-discussed topic. This is partly because I want to make sure I get up-to-date info and partly because there is a new question in here.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>JBPM 5.3</p><p>I have a number of processes with <strong>100% async</strong> service handlers. Many of the processes have handlers that poll a back-end for data, driven by a timer (delay=30s).</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I am trying to resume after halt. By default I use a kSession created in in a spring context using the <drools:> namespace. As the config is fairly complex I use this to help me restore the session as follows. If I restore the session, I don't use the default session</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span lang="EN-US" style="font-family: Calibri; font-size: 10pt;">kSession = JPAKnowledgeService.loadStatefulKnowledgeSession(id,</span></p><p><span lang="EN-US" style="font-family: Calibri; font-size: 10pt;">                                                            kSession.getKnowledgeBase(),</span></p><p><span lang="EN-US" style="font-family: Calibri; font-size: 10pt;">                                                            kSession.getSessionConfiguration(),</span></p><p><span lang="EN-US" style="font-family: Calibri; font-size: 10pt;">                                                            kSession.getEnvironment());</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span lang="EN-US" style="font-family: Calibri; font-size: 10pt;">//?kSession.signalEvent("Trigger", null);  //Seen this in one post?</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Q1. Is there any reason I should NOT initialise from a prev ksession like this? I don’t want to have to create env and config in code as well as spring config</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Q2. Should processes resume without further action (they don’t, even if not timers)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Q3. Should timers resume in 5.3? I know that this has been a subject of hot debate in the past.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Q4. If not, any suggestions on how to </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><ul style="list-style-type: disc;"><li>- EITHER resume processes stuck on timers</li><li>- OR implement polling without timers (e.g. halt processes awaiting an a signal from an externally scheduled call to kSession.signalEvent())</li></ul><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks in anticipation.</p></div>
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