RmiObjectWrapper.java

/*******************************************************************************
 * Copyright (c) 2012-2017 Codenvy, S.A.
 * 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:
 *   Codenvy, S.A. - initial API and implementation
 *******************************************************************************/
package org.eclipse.che.plugin.maven.server.rmi;

import java.rmi.RemoteException;

/**
 * @author Evgen Vidolob
 */
public abstract class RmiObjectWrapper<T> {
    private T wrapped;

    protected RmiObjectWrapper() {

    }

    protected synchronized T getWrapped() {
        return wrapped;
    }

    protected synchronized T getOrCreateWrappedObject() throws RemoteException {
        if (wrapped == null) {
            wrapped = create();
            wrappedCreated();
        }

        return wrapped;
    }

    protected void wrappedCreated() throws RemoteException {
    }

    protected abstract T create() throws RemoteException;

    protected synchronized void cleanUp() {
        wrapped = null;
    }

    protected synchronized void onError() {
        cleanUp();
    }

}