/*
* Copyright (C) 2012 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.crsh.shell.impl.async;
import org.crsh.AbstractTestCase;
import test.shell.base.BaseProcess;
import test.shell.base.BaseProcessContext;
import test.shell.base.BaseProcessFactory;
import test.shell.base.BaseShell;
import test.CommandQueue;
import org.crsh.shell.Shell;
import org.crsh.shell.ShellResponse;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Future;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
public class CancellationTestCase extends AbstractTestCase {
public void testEvaluating() throws Exception {
final AtomicReference<Throwable> failure = new AtomicReference<Throwable>();
final AtomicInteger cancelCount = new AtomicInteger(0);
final CountDownLatch latch1 = new CountDownLatch(1);
final CountDownLatch latch2 = new CountDownLatch(1);
//
BaseProcessFactory factory = new BaseProcessFactory() {
@Override
public BaseProcess create(String request) {
return new BaseProcess(request) {
@Override
protected ShellResponse execute(String request) {
latch1.countDown();
try {
latch2.await();
} catch (InterruptedException e) {
failure.set(e);
}
return ShellResponse.ok();
}
@Override
public void cancel() {
cancelCount.getAndIncrement();
}
};
}
};
//
Shell shell = new BaseShell(factory);
CommandQueue commands = new CommandQueue();
AsyncShell asyncShell = new AsyncShell(commands, shell);
//
BaseProcessContext ctx = BaseProcessContext.create(asyncShell, "foo").execute();
assertEquals(Status.QUEUED, ((AsyncProcess)ctx.getProcess()).getStatus());
assertEquals(0, cancelCount.get());
assertEquals(1, commands.getSize());
// Execute the command
// And wait until the other thread is waiting
Future<?> future = commands.executeAsync();
latch1.await();
assertEquals(Status.EVALUATING, ((AsyncProcess)ctx.getProcess()).getStatus());
assertEquals(0, cancelCount.get());
//
ctx.getProcess().cancel();
assertEquals(Status.CANCELED, ((AsyncProcess)ctx.getProcess()).getStatus());
assertEquals(1, cancelCount.get());
//
ctx.getProcess().cancel();
assertEquals(Status.CANCELED, ((AsyncProcess)ctx.getProcess()).getStatus());
assertEquals(1, cancelCount.get());
// Wait until it's done
latch2.countDown();
future.get();
// Test we received a cancelled response even though we provided an OK result
assertEquals(ShellResponse.Cancelled.class, ctx.getResponse().getClass());
assertEquals(Status.TERMINATED, ((AsyncProcess)ctx.getProcess()).getStatus());
assertEquals(1, cancelCount.get());
//
safeFail(failure.get());
}
public void testQueued() throws Exception {
final AtomicReference<Throwable> failure = new AtomicReference<Throwable>();
//
BaseProcessFactory factory = new BaseProcessFactory() {
@Override
public BaseProcess create(String request) {
return new BaseProcess(request) {
@Override
protected ShellResponse execute(String request) {
failure.set(failure("Was not exepecting request"));
return ShellResponse.ok();
}
@Override
public void cancel() {
failure.set(failure("Was not exepecting cancel"));
}
};
}
};
//
Shell shell = new BaseShell(factory);
CommandQueue commands = new CommandQueue();
AsyncShell asyncShell = new AsyncShell(commands, shell);
//
BaseProcessContext ctx = BaseProcessContext.create(asyncShell, "foo").execute();
assertEquals(Status.QUEUED, ((AsyncProcess)ctx.getProcess()).getStatus());
assertEquals(1, commands.getSize());
//
ctx.getProcess().cancel();
assertEquals(Status.CANCELED, ((AsyncProcess)ctx.getProcess()).getStatus());
// Execute the command
Future<?> future = commands.executeAsync();
future.get();
// Test we get terminated status and the callback was done
assertEquals(Status.TERMINATED, ((AsyncProcess)ctx.getProcess()).getStatus());
assertEquals(ShellResponse.Cancelled.class, ctx.getResponse().getClass());
safeFail(failure.get());
}
}