/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project 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
* General Public License or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* <http://www.gnu.org/licenses/> or <http://www.apache.org/licenses/LICENSE-2.0>.
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.quorum.pool.complex;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicReference;
import org.smallmind.scribe.pen.LoggerManager;
public class ComponentCreationWorker<C> implements Runnable {
private static enum State {COMPLETED, ABORTED, TERMINATED}
private final CountDownLatch terminationLatch = new CountDownLatch(1);
private final ComponentPool<C> componentPool;
private final AtomicReference<State> stateRef = new AtomicReference<State>();
private ComponentInstance<C> componentInstance;
private Exception exception;
public ComponentCreationWorker (ComponentPool<C> componentPool) {
this.componentPool = componentPool;
}
public ComponentInstance<C> getComponentInstance () {
return componentInstance;
}
public boolean abort ()
throws Exception {
if (!stateRef.compareAndSet(null, State.ABORTED)) {
terminationLatch.await();
if (State.TERMINATED.equals(stateRef.get())) {
throw exception;
}
return false;
}
return true;
}
public void run () {
try {
componentInstance = componentPool.getComponentInstanceFactory().createInstance(componentPool);
if ((!stateRef.compareAndSet(null, State.COMPLETED)) && (componentInstance != null)) {
LoggerManager.getLogger(ComponentCreationWorker.class).error("Completed connection is being closed due to a request in the %s state - you may want to increase the connection wait time", stateRef.get().name());
componentInstance.close();
}
} catch (Exception exception) {
if (!stateRef.compareAndSet(null, State.TERMINATED)) {
LoggerManager.getLogger(ComponentCreationWorker.class).error(exception);
} else {
this.exception = exception;
}
} finally {
terminationLatch.countDown();
}
}
}