com.liferay.portal.kernel.nio.intraband.welder.BaseWelder Maven / Gradle / Ivy
/**
* Copyright (c) 2000-present Liferay, Inc. All rights reserved.
*
* This library 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 library 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.
*/
package com.liferay.portal.kernel.nio.intraband.welder;
import com.liferay.portal.kernel.nio.intraband.Intraband;
import com.liferay.portal.kernel.nio.intraband.RegistrationReference;
import java.io.IOException;
import java.io.ObjectInputStream;
/**
* @author Shuyang Zhou
*/
public abstract class BaseWelder implements Welder {
public BaseWelder() {
// Assignments have to stay in the constructor because we need to
// differentiate between a constructor created object and a
// deserialization created object. Only the constructor created object
// needs to assign values. The deserialization created object gets its
// values from the original object.
server = true;
}
@Override
public synchronized void destroy() throws IOException {
if (state != State.WELDED) {
throw new IllegalStateException(
"Unable to destroy a welder with state " + state);
}
registrationReference.cancelRegistration();
doDestroy();
state = State.DESTROYED;
}
@Override
public synchronized RegistrationReference weld(Intraband intraband)
throws IOException {
if (state != State.CREATED) {
throw new IllegalStateException(
"Unable to weld a welder with state " + state);
}
if (server) {
registrationReference = weldServer(intraband);
}
else {
registrationReference = weldClient(intraband);
}
state = State.WELDED;
return registrationReference;
}
protected abstract void doDestroy() throws IOException;
protected abstract RegistrationReference weldClient(Intraband intraband)
throws IOException;
protected abstract RegistrationReference weldServer(Intraband intraband)
throws IOException;
protected transient RegistrationReference registrationReference;
protected final transient boolean server;
protected transient State state = State.CREATED;
protected static enum State {
CREATED, DESTROYED, WELDED
}
private void readObject(ObjectInputStream objectInputStream)
throws ClassNotFoundException, IOException {
objectInputStream.defaultReadObject();
state = State.CREATED;
}
}