Using A Closure To "Terminate" CFThread Tags Across Page Requests In Lucee CFML 5.3.6.61

output.txt

[ Test Thread 4b ]: Running iteration 1.
[ Test Thread 4b ]: Running iteration 2.
[ Test Thread 4b ]: Running iteration 3.
[ Test Thread 4b ]: Running iteration 4.
[ Test Thread 4b ]: About to force quit thread.
[ Test Thread 4b ]: CFThread exiting.

start.cfm

<cfscript>

	// Keep track of the spawned threads so that we can "force quit" them from another
	// page reference.
	if ( isNull( application.threadRefs ) ) {

		application.threadRefs = [];

	}

	// The execution of the CFThread tag is limited by the request-timeout of the server
	// and application. As such, we have to bump up the request-timeout to make sure that
	// our threads aren't terminated prematurely.
	setting
		requestTimeout = 120
	;

	// ------------------------------------------------------------------------------- //
	// ------------------------------------------------------------------------------- //

	uniqueName = "Test Thread #createUniqueId()#";

	thread
		name = "testThread"
		type = "daemon"
		uniqueName = uniqueName
		{

		// I determine if the internal workings of the thread should continue running.
		var isRunning = true;

		// The THREAD scope acts as a "tunnel" by which the CFThread tag can expose data
		// to the outside world. In this case, we're going to expose a CLOSURE that sets
		// and THREAD-LOCAL VARIABLE to FALSE indicating that the CFThread should stop
		// executing its internal loop.
		thread.forceQuit = () => {

			systemOutput( "[ #uniqueName# ]: About to force quit thread." );
			isRunning = false;

		};

		// Keep "doing stuff" until we are told to stop.
		for ( var i = 1 ; isRunning && i <= 120 ; i++ ) {

			systemOutput( "[ #uniqueName# ]: Running iteration #i#.", true, false );
			sleep( 1000 );

		}

		systemOutput( "[ #uniqueName# ]: CFThread exiting.", true, false );

	} // END: Thread.

	// ------------------------------------------------------------------------------- //
	// ------------------------------------------------------------------------------- //

	// Keep a reference to the thread so we can terminate it from another page.
	application.threadRefs.append( cfthread.testThread );
	
</cfscript>

stop.cfm

<cfscript>

	if ( isNull( application.threadRefs ) || ! application.threadRefs.len() ) {

		echo( "No threads to kill." );

	}

	// Let's Loop over all of the cache CFThread instances and try to force-quit them.
	for ( threadRef in application.threadRefs ) {

		// NOTE: This IS NOT terminating the thread - it is calling a Thread-local
		// function that has logic that will, in turn, allow the thread to complete.
		threadRef.forceQuit();

	}

	application.threadRefs = [];
	
</cfscript>