| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.commons.jexl3; |
| |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.CancellationException; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.FutureTask; |
| import java.util.concurrent.Semaphore; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| import org.apache.commons.jexl3.internal.Script; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| /** |
| * Tests around asynchronous script execution and interrupts. |
| */ |
| @SuppressWarnings({"UnnecessaryBoxing", "AssertEqualsBetweenInconvertibleTypes"}) |
| public class ScriptCallableTest extends JexlTestCase { |
| //Logger LOGGER = Logger.getLogger(VarTest.class.getName()); |
| public ScriptCallableTest() { |
| super("ScriptCallableTest"); |
| } |
| |
| @Test |
| public void testFuture() throws Exception { |
| JexlScript e = JEXL.createScript("while(true);"); |
| FutureTask<Object> future = new FutureTask<Object>(e.callable(null)); |
| |
| ExecutorService executor = Executors.newFixedThreadPool(1); |
| executor.submit(future); |
| Object t = 42; |
| try { |
| t = future.get(100, TimeUnit.MILLISECONDS); |
| Assert.fail("should have timed out"); |
| } catch (TimeoutException xtimeout) { |
| // ok, ignore |
| future.cancel(true); |
| } finally { |
| executor.shutdown(); |
| } |
| |
| Assert.assertTrue(future.isCancelled()); |
| Assert.assertEquals(42, t); |
| } |
| |
| @Test |
| public void testCallableCancel() throws Exception { |
| final Semaphore latch = new Semaphore(0); |
| JexlContext ctxt = new MapContext(); |
| ctxt.set("latch", latch); |
| |
| JexlScript e = JEXL.createScript("latch.release(); while(true);"); |
| final Script.Callable c = (Script.Callable) e.callable(ctxt); |
| Object t = 42; |
| Callable<Object> kc = new Callable<Object>() { |
| @Override |
| public Object call() throws Exception { |
| latch.acquire(); |
| return c.cancel(); |
| } |
| }; |
| ExecutorService executor = Executors.newFixedThreadPool(2); |
| Future<?> future = executor.submit(c); |
| Future<?> kfc = executor.submit(kc); |
| try { |
| Assert.assertTrue((Boolean) kfc.get()); |
| t = future.get(); |
| Assert.fail("should have been cancelled"); |
| } catch (ExecutionException xexec) { |
| // ok, ignore |
| Assert.assertTrue(xexec.getCause() instanceof JexlException.Cancel); |
| } finally { |
| executor.shutdown(); |
| } |
| Assert.assertTrue(c.isCancelled()); |
| } |
| |
| @Test |
| public void testCallableTimeout() throws Exception { |
| final Semaphore latch = new Semaphore(0); |
| JexlContext ctxt = new MapContext(); |
| ctxt.set("latch", latch); |
| |
| JexlScript e = JEXL.createScript("latch.release(); while(true);"); |
| Callable<Object> c = e.callable(ctxt); |
| Object t = 42; |
| |
| ExecutorService executor = Executors.newFixedThreadPool(1); |
| Future<?> future = executor.submit(c); |
| try { |
| latch.acquire(); |
| t = future.get(100, TimeUnit.MILLISECONDS); |
| Assert.fail("should have timed out"); |
| } catch (TimeoutException xtimeout) { |
| // ok, ignore |
| future.cancel(true); |
| } finally { |
| executor.shutdown(); |
| } |
| Assert.assertTrue(future.isCancelled()); |
| Assert.assertEquals(42, t); |
| } |
| |
| @Test |
| public void testCallableClosure() throws Exception { |
| JexlScript e = JEXL.createScript("function(t) {while(t);}"); |
| Callable<Object> c = e.callable(null, Boolean.TRUE); |
| Object t = 42; |
| |
| ExecutorService executor = Executors.newFixedThreadPool(1); |
| Future<?> future = executor.submit(c); |
| try { |
| t = future.get(100, TimeUnit.MILLISECONDS); |
| Assert.fail("should have timed out"); |
| } catch (TimeoutException xtimeout) { |
| // ok, ignore |
| future.cancel(true); |
| } finally { |
| executor.shutdown(); |
| } |
| Assert.assertTrue(future.isCancelled()); |
| Assert.assertEquals(42, t); |
| } |
| |
| public static class TestContext extends MapContext implements JexlContext.NamespaceResolver { |
| @Override |
| public Object resolveNamespace(String name) { |
| return name == null ? this : null; |
| } |
| |
| public int wait(int s) throws InterruptedException { |
| Thread.sleep(1000 * s); |
| return s; |
| } |
| |
| public int waitInterrupt(int s) { |
| try { |
| Thread.sleep(1000 * s); |
| return s; |
| } catch (InterruptedException xint) { |
| Thread.currentThread().interrupt(); |
| } |
| return -1; |
| } |
| |
| public int runForever() { |
| while (true) { |
| if (Thread.currentThread().isInterrupted()) { |
| break; |
| } |
| } |
| return 1; |
| } |
| |
| public int interrupt() throws InterruptedException { |
| Thread.currentThread().interrupt(); |
| return 42; |
| } |
| |
| public void sleep(long millis) throws InterruptedException { |
| try { |
| Thread.sleep(millis); |
| } catch (InterruptedException xint) { |
| throw xint; |
| } |
| } |
| |
| public int hangs(Object t) { |
| return 1; |
| } |
| } |
| |
| @Test |
| public void testNoWait() throws Exception { |
| JexlScript e = JEXL.createScript("wait(0)"); |
| Callable<Object> c = e.callable(new TestContext()); |
| |
| ExecutorService executor = Executors.newFixedThreadPool(1); |
| try { |
| Future<?> future = executor.submit(c); |
| Object t = future.get(2, TimeUnit.SECONDS); |
| Assert.assertTrue(future.isDone()); |
| Assert.assertEquals(0, t); |
| } finally { |
| executor.shutdown(); |
| } |
| } |
| |
| @Test |
| public void testWait() throws Exception { |
| JexlScript e = JEXL.createScript("wait(1)"); |
| Callable<Object> c = e.callable(new TestContext()); |
| |
| ExecutorService executor = Executors.newFixedThreadPool(1); |
| try { |
| Future<?> future = executor.submit(c); |
| Object t = future.get(2, TimeUnit.SECONDS); |
| Assert.assertEquals(1, t); |
| } finally { |
| executor.shutdown(); |
| } |
| } |
| |
| @Test |
| public void testCancelWait() throws Exception { |
| JexlScript e = JEXL.createScript("wait(10)"); |
| Callable<Object> c = e.callable(new TestContext()); |
| |
| ExecutorService executor = Executors.newFixedThreadPool(1); |
| try { |
| 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); |
| } |
| Assert.assertTrue(future.isCancelled()); |
| Assert.assertEquals(42, t); |
| } finally { |
| executor.shutdown(); |
| } |
| } |
| |
| @Test |
| public void testCancelWaitInterrupt() throws Exception { |
| JexlScript e = JEXL.createScript("waitInterrupt(42)"); |
| Callable<Object> c = e.callable(new TestContext()); |
| |
| 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); |
| } finally { |
| executor.shutdown(); |
| } |
| Assert.assertTrue(future.isCancelled()); |
| Assert.assertEquals(42, t); |
| } |
| |
| @Test |
| public void testCancelForever() throws Exception { |
| final Semaphore latch = new Semaphore(0); |
| JexlContext ctxt = new TestContext(); |
| ctxt.set("latch", latch); |
| |
| JexlScript e = JEXL.createScript("latch.release(); runForever()"); |
| Callable<Object> c = e.callable(ctxt); |
| |
| ExecutorService executor = Executors.newFixedThreadPool(1); |
| Future<?> future = executor.submit(c); |
| Object t = 42; |
| |
| try { |
| latch.acquire(); |
| t = future.get(100, TimeUnit.MILLISECONDS); |
| Assert.fail("should have timed out"); |
| } catch (TimeoutException xtimeout) { |
| // ok, ignore |
| future.cancel(true); |
| } finally { |
| executor.shutdown(); |
| } |
| Assert.assertTrue(future.isCancelled()); |
| Assert.assertEquals(42, t); |
| } |
| |
| @Test |
| public void testCancelLoopWait() throws Exception { |
| JexlScript e = JEXL.createScript("while (true) { wait(10) }"); |
| Callable<Object> c = e.callable(new TestContext()); |
| |
| 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) { |
| future.cancel(true); |
| } finally { |
| executor.shutdown(); |
| } |
| Assert.assertTrue(future.isCancelled()); |
| Assert.assertEquals(42, t); |
| } |
| |
| @Test |
| public void testInterruptVerboseStrict() throws Exception { |
| runInterrupt(new JexlBuilder().silent(false).strict(true).create()); |
| } |
| |
| @Test |
| public void testInterruptVerboseLenient() throws Exception { |
| runInterrupt(new JexlBuilder().silent(false).strict(false).create()); |
| } |
| |
| @Test |
| public void testInterruptSilentStrict() throws Exception { |
| runInterrupt(new JexlBuilder().silent(true).strict(true).create()); |
| } |
| |
| @Test |
| public void testInterruptSilentLenient() throws Exception { |
| runInterrupt(new JexlBuilder().silent(true).strict(false).create()); |
| } |
| |
| @Test |
| public void testInterruptCancellable() throws Exception { |
| runInterrupt(new JexlBuilder().silent(true).strict(true).cancellable(true).create()); |
| } |
| |
| /** |
| * Redundant test with previous ones but impervious to JEXL engine configuation. |
| * @param silent silent engine flag |
| * @param strict strict (aka not lenient) engine flag |
| * @throws Exception if there is a regression |
| */ |
| private void runInterrupt(JexlEngine jexl) throws Exception { |
| ExecutorService exec = Executors.newFixedThreadPool(2); |
| try { |
| JexlContext ctxt = new TestContext(); |
| |
| // run an interrupt |
| JexlScript sint = jexl.createScript("interrupt(); return 42"); |
| Object t = null; |
| Script.Callable c = (Script.Callable) sint.callable(ctxt); |
| try { |
| t = c.call(); |
| if (c.isCancellable()) { |
| Assert.fail("should have thrown a Cancel"); |
| } |
| } catch (JexlException.Cancel xjexl) { |
| if (!c.isCancellable()) { |
| Assert.fail("should not have thrown " + xjexl); |
| } |
| } |
| Assert.assertTrue(c.isCancelled()); |
| Assert.assertNotEquals(42, t); |
| |
| // self interrupt |
| Future<Object> f = null; |
| c = (Script.Callable) sint.callable(ctxt); |
| try { |
| f = exec.submit(c); |
| t = f.get(); |
| if (c.isCancellable()) { |
| Assert.fail("should have thrown a Cancel"); |
| } |
| } catch (ExecutionException xexec) { |
| if (!c.isCancellable()) { |
| Assert.fail("should not have thrown " + xexec); |
| } |
| } |
| Assert.assertTrue(c.isCancelled()); |
| Assert.assertNotEquals(42, t); |
| |
| // timeout a sleep |
| JexlScript ssleep = jexl.createScript("sleep(30000); return 42"); |
| try { |
| f = exec.submit(ssleep.callable(ctxt)); |
| t = f.get(100L, TimeUnit.MILLISECONDS); |
| Assert.fail("should timeout"); |
| } catch (TimeoutException xtimeout) { |
| if (f != null) { |
| f.cancel(true); |
| } |
| } |
| Assert.assertNotEquals(42, t); |
| |
| // cancel a sleep |
| try { |
| final Future<Object> fc = exec.submit(ssleep.callable(ctxt)); |
| Runnable cancels = new Runnable() { |
| @Override |
| public void run() { |
| try { |
| Thread.sleep(200L); |
| } catch (Exception xignore) { |
| |
| } |
| fc.cancel(true); |
| } |
| }; |
| exec.submit(cancels); |
| t = fc.get(); |
| Assert.fail("should be cancelled"); |
| } catch (CancellationException xexec) { |
| // this is the expected result |
| } |
| |
| // timeout a while(true) |
| JexlScript swhile = jexl.createScript("while(true); return 42"); |
| try { |
| f = exec.submit(swhile.callable(ctxt)); |
| t = f.get(100L, TimeUnit.MILLISECONDS); |
| Assert.fail("should timeout"); |
| } catch (TimeoutException xtimeout) { |
| if (f != null) { |
| f.cancel(true); |
| } |
| } |
| Assert.assertNotEquals(42, t); |
| |
| // cancel a while(true) |
| try { |
| final Future<Object> fc = exec.submit(swhile.callable(ctxt)); |
| Runnable cancels = new Runnable() { |
| @Override |
| public void run() { |
| try { |
| Thread.sleep(200L); |
| } catch (Exception xignore) { |
| |
| } |
| fc.cancel(true); |
| } |
| }; |
| exec.submit(cancels); |
| t = fc.get(); |
| Assert.fail("should be cancelled"); |
| } catch (CancellationException xexec) { |
| // this is the expected result |
| } |
| Assert.assertNotEquals(42, t); |
| } finally { |
| exec.shutdown(); |
| } |
| } |
| |
| @Test |
| public void testHangs() throws Exception { |
| JexlScript e = JEXL.createScript("hangs()"); |
| Callable<Object> c = e.callable(new TestContext()); |
| |
| ExecutorService executor = Executors.newFixedThreadPool(1); |
| try { |
| Future<?> future = executor.submit(c); |
| Object t = future.get(1, TimeUnit.SECONDS); |
| Assert.fail("hangs should not be solved"); |
| } catch(ExecutionException xexec) { |
| Assert.assertTrue(xexec.getCause() instanceof JexlException.Method); |
| } finally { |
| executor.shutdown(); |
| } |
| } |
| } |