org.openadaptor.auxil.connector.rmi.RMIReadConnector.java Source code

Introduction

Here is the source code for org.openadaptor.auxil.connector.rmi.RMIReadConnector.java

Source

/*
 Copyright (C) 2001 - 2010 The Software Conservancy as Trustee. All rights reserved.
    
 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in the
 Software without restriction, including without limitation the rights to use, copy,
 modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
 and to permit persons to whom the Software is furnished to do so, subject to the
 following conditions:
    
 The above copyright notice and this permission notice shall be included in all 
 copies or substantial portions of the Software.
    
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
    
 Nothing in this notice shall be deemed to grant any rights to trademarks, copyrights,
 patents, trade secrets or any other intellectual property of the licensor or any
 contributor except as expressly stated herein. No patent license is granted separate
 from the Software, for code that you delete from the Software, or for combinations
 of the Software with other software or hardware.
*/

package org.openadaptor.auxil.connector.rmi;

import java.io.Serializable;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.rmi.server.UnicastRemoteObject;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.openadaptor.core.IReadConnector;
import org.openadaptor.core.connector.QueuingReadConnector;
import org.openadaptor.core.exception.ConnectionException;
import org.openadaptor.core.exception.ValidationException;
import org.openadaptor.util.NetUtil;

/**
 * exposes IDataProcessor interface as remote interface. Allowing rmi clients to send data for
 * processing.
 * 
 * @author perryj
 *
 */
public class RMIReadConnector extends QueuingReadConnector implements IReadConnector {

    private static final Log log = LogFactory.getLog(RMIReadConnector.class);

    public static final int DEFAULT_PORT = 1099;

    public static final String DEFAULT_NAME = "RMIReadConnector";

    private IRemoteDataProcessor rmiServer;

    private String registryHost;

    private int registryPort = DEFAULT_PORT;

    private String serviceName = DEFAULT_NAME;

    private boolean createRegistry = false;

    public RMIReadConnector() {
        super();
    }

    public RMIReadConnector(String id) {
        super(id);
    }

    public void setRegistryHost(String registryHost) {
        this.registryHost = registryHost;
    }

    public void setServiceName(String name) {
        this.serviceName = name;
    }

    public void setRegistryPort(int registryPort) {
        this.registryPort = registryPort;
    }

    public void setCreateRegistry(boolean createRegistry) {
        this.createRegistry = createRegistry;
    }

    public void validate(List exceptions) {
        if (serviceName == null) {
            exceptions.add(new ValidationException("rmiName is not set", this));
        }
    }

    public void connect() {

        if (createRegistry) {
            try {
                log.info("starting rmi registry on port " + registryPort);
                LocateRegistry.createRegistry(registryPort);
                registryHost = NetUtil.getLocalHostname();
            } catch (RemoteException e) {
                throw new ConnectionException("failed to create rmi registry", e, this);
            }
        }

        try {
            rmiServer = new RMIDataProcessor();
        } catch (RemoteException e) {
            throw new ConnectionException("failed to create rmi server", e, this);
        }

        try {
            log.info("binding rmi server " + serviceName + " on " + registryHost + ":" + registryPort);
            LocateRegistry.getRegistry(registryHost, registryPort).rebind(serviceName, rmiServer);
        } catch (Exception e) {
            rmiServer = null;
            throw new ConnectionException("failed to bind ", e, this);
        }
    }

    public void disconnect() {
        try {
            LocateRegistry.getRegistry(registryHost, registryPort).unbind(serviceName);
        } catch (Exception e) {
            throw new ConnectionException("failed to unbind", e, this);
        } finally {
            rmiServer = null;
        }
    }

    public Object getReaderContext() {
        return null;
    }

    public boolean isDry() {
        return false;
    }

    class RMIDataProcessor extends UnicastRemoteObject implements IRemoteDataProcessor {

        private static final long serialVersionUID = 1L;

        protected RMIDataProcessor() throws RemoteException {
            super();
        }

        public void process(Serializable data) {
            enqueue(data);
        }
    }
}