001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.servicemix.jbi.util;
018    
019    import java.io.IOException;
020    import java.io.OutputStream;
021    import java.util.Iterator;
022    import java.util.List;
023    import java.util.concurrent.CopyOnWriteArrayList;
024    
025    /**
026     * Write to multiple OutputStreams
027     * 
028     * @version $Revision: 564607 $
029     */
030    public class MultiplexOutputStream extends OutputStream {
031        
032        List streams = new CopyOnWriteArrayList();
033    
034        
035        /**
036         * Add an Output Stream
037         * @param os
038         */
039        public void add(OutputStream os) {
040            streams.add(os);
041        }
042        
043        /**
044         * Remove an OutputStream
045         * @param os
046         */
047        public void remove(OutputStream os) {
048            streams.remove(os);
049        }
050    
051        /**
052         * write a byte
053         * @param b
054         * @throws IOException
055         */
056        public synchronized void write(int b) throws IOException {
057            for (Iterator i = streams.iterator(); i.hasNext();) {
058                OutputStream s = (OutputStream) i.next();
059                s.write(b);
060            }
061        }
062    
063        /**
064         * write an array
065         * @param b
066         * @param off
067         * @param len
068         * @throws IOException
069         */
070        public synchronized void write(byte b[], int off, int len) throws IOException {
071            for (Iterator i = streams.iterator(); i.hasNext();) {
072                OutputStream s = (OutputStream) i.next();
073                s.write(b, off, len);
074            }
075        }
076    
077        /**
078         * flush
079         * @throws IOException
080         */
081        public void flush() throws IOException {
082            for (Iterator i = streams.iterator(); i.hasNext();) {
083                OutputStream s = (OutputStream) i.next();
084                s.flush();
085            }
086        }
087    
088        /**
089         * close
090         * @throws IOException
091         */
092        public void close() throws IOException {
093            for (Iterator i = streams.iterator(); i.hasNext();) {
094                OutputStream s = (OutputStream) i.next();
095                s.close();
096            }
097            streams.clear();
098        }
099    }