DominoIIOPClient.java

/*******************************************************************************
 * This file is part of OpenNMS(R).
 *
 * Copyright (C) 2008-2011 The OpenNMS Group, Inc.
 * OpenNMS(R) is Copyright (C) 1999-2011 The OpenNMS Group, Inc.
 *
 * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
 *
 * OpenNMS(R) is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 *
 * OpenNMS(R) 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with OpenNMS(R).  If not, see:
 *      http://www.gnu.org/licenses/
 *
 * For more information contact:
 *     OpenNMS(R) Licensing <license@opennms.org>
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 *******************************************************************************/

package org.opennms.netmgt.provision.detector.simple.client;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.SocketException;
import java.net.URL;
import java.net.URLConnection;

import org.apache.commons.io.IOUtils;
import org.opennms.core.utils.InetAddressUtils;
import org.opennms.core.utils.LogUtils;

/**
 * <p>DominoIIOPClient class.</p>
 *
 * @author thedesloge
 * @version $Id: $
 */
public class DominoIIOPClient extends LineOrientedClient {
    
    private int m_iorPort = 1000;
    
    /** {@inheritDoc} */
    public void connect(final InetAddress host, final int port, final int timeout) throws IOException, Exception {        
        if(!preconnect(host, getIorPort(), timeout)) {
            throw new Exception("Failed to preconnect");
        }
    }

    /**
     * @param timeout 
     * @param port 
     * @param host 
     * @param timeout 
     * @return
     * @throws IOException 
     */
    private boolean preconnect(final InetAddress host, final int port, final int timeout) throws IOException {
        return retrieveIORText(InetAddressUtils.str(host), port, timeout);
    }

    /**
     * @param hostAddress
     * @param port
     * @return
     */
    private boolean retrieveIORText(final String hostAddress, final int port, final int timeout) throws IOException {
        String IOR = "";
        final URL u = new URL("http://" + hostAddress + ":" + port + "/diiop_ior.txt");
        try {
			final URLConnection conn = u.openConnection();
			conn.setConnectTimeout(timeout);
			conn.setReadTimeout(timeout);
			InputStreamReader isr = null;
			BufferedReader br = null;
			try {
			    isr = new InputStreamReader(conn.getInputStream());
			    br = new BufferedReader(isr);
			    boolean done = false;
			    while (!done) {
			        final String line = br.readLine();
			        if (line == null) {
			            // end of stream
			            done = true;
			        } else {
			            IOR += line;
			            if (IOR.startsWith("IOR:")) {
			                // the IOR does not span a line, so we're done
			                done = true;
			            }
			        }
			    }
			} finally {
			    IOUtils.closeQuietly(br);
			    IOUtils.closeQuietly(isr);
			}
		} catch (final SocketException e) {
			LogUtils.warnf(this, e, "Unable to connect to " + u);
		}
        if (!IOR.startsWith("IOR:")) return false;
        
        return true;
    }

    /**
     * <p>setIorPort</p>
     *
     * @param iorPort a int.
     */
    public void setIorPort(final int iorPort) {
        m_iorPort = iorPort;
    }

    /**
     * <p>getIorPort</p>
     *
     * @return a int.
     */
    public int getIorPort() {
        return m_iorPort;
    }
    

}