Ignition Keep Alive Code

[pturmel]

Managing multiple asynchronous threads

To manage long-running jython threads through scripting restarts, you need to: Place the thread object in a dictionary that retains its content through script restarts. I used to recommend the dictionary from system.util.getGlobals(), but that is no longer suitable. I created a free Life Cycle Module that provides such dictionaries going forward. Write the asynchronous function’s loop so that it regularly checks Thread.interrupted(), particularly after any java I/O operations. Clean up …

(But note that my life cycle module's features have been superceded by the integration toolkit.)

@Julian_Islic

I wish that the gateway had a keep alive event handler that would just run a script indefinitely.

Not actually possible--leaks the memory of the jython interpreter of the old version of the code in question (along with everything else referenced by the old interpreter). Under no circumstance should you place jython classes into a JVM persistent dictionary.