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/*******************************************************************************
* Copyright (c) 2010 Boeing.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Boeing - initial API and implementation
*******************************************************************************/
package org.eclipse.osee.ote.message.io;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
/**
* @author Ken J. Aguilar
*/
public class MessageIoManagementService implements IMessageIoManagementService {
private final HashSet<IMessageIoDriver> drivers = new HashSet<>();
private final Lock lock = new ReentrantLock();
private boolean ioStarted = false;
@Override
public void install(IMessageIoDriver ioDriver) {
lock.lock();
if (!drivers.add(ioDriver)) {
// driver was already installed
lock.unlock();
return;
}
if (ioStarted) {
// make sure we release the lock before entering unknown code
lock.unlock();
ioDriver.start();
} else {
lock.unlock();
}
}
@Override
public void startIO() {
lock.lock();
ioStarted = true;
Set<IMessageIoDriver> copiedDrivers = new HashSet<>(drivers);
lock.unlock();
for (IMessageIoDriver driver : copiedDrivers) {
driver.start();
}
}
@Override
public void stopIO() {
lock.lock();
ioStarted = false;
Set<IMessageIoDriver> copiedDrivers = new HashSet<>(drivers);
lock.unlock();
for (IMessageIoDriver driver : copiedDrivers) {
driver.stop();
}
}
@Override
public void uninstall(IMessageIoDriver ioDriver) {
lock.lock();
boolean changed = drivers.remove(ioDriver);
lock.unlock();
if (changed && ioDriver.isStarted()) {
ioDriver.stop();
}
}
}
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