Best place to run system.serial.readBytes() in gateway scope for unsolicited data

[pturmel]

A long-lived background thread that blocks on readBytes() is the only reliable method. But see this comment:

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 …