001: /* ====================================================================
002: * The Apache Software License, Version 1.1
003: *
004: * Copyright (c) 1997-2003 The Apache Software Foundation. All rights
005: * reserved.
006: *
007: * Redistribution and use in source and binary forms, with or without
008: * modification, are permitted provided that the following conditions
009: * are met:
010: *
011: * 1. Redistributions of source code must retain the above copyright
012: * notice, this list of conditions and the following disclaimer.
013: *
014: * 2. Redistributions in binary form must reproduce the above copyright
015: * notice, this list of conditions and the following disclaimer in
016: * the documentation and/or other materials provided with the
017: * distribution.
018: *
019: * 3. The end-user documentation included with the redistribution,
020: * if any, must include the following acknowledgment:
021: * "This product includes software developed by the
022: * Apache Software Foundation (http://www.apache.org/)."
023: * Alternately, this acknowledgment may appear in the software
024: * itself, if and wherever such third-party acknowledgments
025: * normally appear.
026: *
027: * 4. The names "Jakarta", "Avalon", and "Apache Software Foundation"
028: * must not be used to endorse or promote products derived from this
029: * software without prior written permission. For written
030: * permission, please contact apache@apache.org.
031: *
032: * 5. Products derived from this software may not be called "Apache",
033: * nor may "Apache" appear in their name, without prior written
034: * permission of the Apache Software Foundation.
035: *
036: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
037: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
038: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
039: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
040: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
041: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
042: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
043: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
044: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
045: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
046: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
047: * SUCH DAMAGE.
048: * ====================================================================
049: *
050: * This software consists of voluntary contributions made by many
051: * individuals on behalf of the Apache Software Foundation. For more
052: * information on the Apache Software Foundation, please see
053: * <http://www.apache.org/>.
054: */
055: package org.apache.log.output.net;
056:
057: import java.io.IOException;
058: import java.net.DatagramPacket;
059: import java.net.DatagramSocket;
060: import java.net.InetAddress;
061: import org.apache.log.format.Formatter;
062: import org.apache.log.output.AbstractOutputTarget;
063:
064: /**
065: * A datagram output target.
066: * Useful for writing using custom protocols or writing to syslog daemons.
067: *
068: * @author <a href="mailto:dev@avalon.apache.org">Avalon Development Team</a>
069: * @author <a href="mailto:peter@apache.org">Peter Donald</a>
070: */
071: public class DatagramOutputTarget extends AbstractOutputTarget {
072: ///Socket on which to send datagrams
073: private DatagramSocket m_socket;
074:
075: /**
076: * Create a output target with end point specified by address and port.
077: *
078: * @param address the address endpoint
079: * @param port the address port
080: * @param formatter the message formatter
081: * @exception IOException if an error occurs
082: */
083: public DatagramOutputTarget(final InetAddress address,
084: final int port, final Formatter formatter)
085: throws IOException {
086: super (formatter);
087: m_socket = new DatagramSocket();
088: m_socket.connect(address, port);
089: open();
090: }
091:
092: /**
093: * Create a output target with end point specified by address and port.
094: *
095: * @param address the address endpoint
096: * @param port the address port
097: * @exception IOException if an error occurs
098: */
099: public DatagramOutputTarget(final InetAddress address,
100: final int port) throws IOException {
101: this (address, port, null);
102: }
103:
104: /**
105: * Method to write output to datagram.
106: *
107: * @param stringData the data to be output
108: */
109: protected void write(final String stringData) {
110: final byte[] data = stringData.getBytes();
111:
112: try {
113: final DatagramPacket packet = new DatagramPacket(data,
114: data.length);
115: m_socket.send(packet);
116: } catch (final IOException ioe) {
117: getErrorHandler().error("Error sending datagram.", ioe,
118: null);
119: }
120: }
121:
122: /**
123: * Shutdown target.
124: * Attempting to write to target after close() will cause errors to be logged.
125: */
126: public synchronized void close() {
127: super.close();
128: m_socket = null;
129: }
130: }
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