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From "Dmitri Blinov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (JEXL-205) testCancelForever() is not terminated properly
Date Tue, 12 Jul 2016 08:18:20 GMT
Dmitri Blinov created JEXL-205:
----------------------------------

             Summary: testCancelForever() is not terminated properly
                 Key: JEXL-205
                 URL: https://issues.apache.org/jira/browse/JEXL-205
             Project: Commons JEXL
          Issue Type: Task
    Affects Versions: 3.0
            Reporter: Dmitri Blinov


After runnning Jexl tests I have noticed that the thread from testCancelForever() test is
still executing, and its stack trace is as follows:

{code}
org.apache.commons.jexl3.ScriptCallableTest$TestContext.runForever(ScriptCallableTest.java:159)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:606)
org.apache.commons.jexl3.internal.introspection.MethodExecutor.invoke(MethodExecutor.java:93)
org.apache.commons.jexl3.internal.Interpreter.call(Interpreter.java:1816)
org.apache.commons.jexl3.internal.Interpreter.visit(Interpreter.java:1535)
org.apache.commons.jexl3.parser.ASTFunctionNode.jjtAccept(ASTFunctionNode.java:18)
org.apache.commons.jexl3.internal.Interpreter.visit(Interpreter.java:1119)
org.apache.commons.jexl3.parser.ASTJexlScript.jjtAccept(ASTJexlScript.java:55)
org.apache.commons.jexl3.internal.Interpreter.interpret(Interpreter.java:210)
org.apache.commons.jexl3.internal.Script$Callable.interpret(Script.java:364)
org.apache.commons.jexl3.internal.Script$Callable.call(Script.java:372)
   - locked org.apache.commons.jexl3.internal.Script$Callable@35595365
java.util.concurrent.FutureTask.run(FutureTask.java:262)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
java.lang.Thread.run(Thread.java:745)
{code}

may be its worth rewriting the test to something like this

{code}
    public static class TestContext extends MapContext implements JexlContext.NamespaceResolver
{

        protected volatile boolean x = false;

        public int runForever() {
            while (true) {
                if (x) {
                    break;
                }
            }
            return 1;
        }
...
    @Test
    public void testCancelForever() throws Exception {
        JexlScript e = JEXL.createScript("runForever()");

        TestContext tctx = new TestContext();

        Callable<Object> c = e.callable(tctx);

        ExecutorService executor = Executors.newFixedThreadPool(1);
        Future<?> future = executor.submit(c);
        Object t = 42;

        try {
            t = future.get(100, TimeUnit.MILLISECONDS);
            Assert.fail("should have timed out");
        } catch (TimeoutException xtimeout) {
            // ok, ignore
            future.cancel(true);
            tctx.x = true;
        } finally {
            executor.shutdown();
        }

{code}



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