Source Code Cross Referenced for LogOutputStream.java in  » Web-Server » Quadcap-Web-Server » com » quadcap » io » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Server » Quadcap Web Server » com.quadcap.io 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        package com.quadcap.io;
002:
003:        /* Copyright 1997 - 2003 Quadcap Software.  All rights reserved.
004:         *
005:         * This software is distributed under the Quadcap Free Software License.
006:         * This software may be used or modified for any purpose, personal or
007:         * commercial.  Open Source redistributions are permitted.  Commercial
008:         * redistribution of larger works derived from, or works which bundle
009:         * this software requires a "Commercial Redistribution License"; see
010:         * http://www.quadcap.com/purchase.
011:         *
012:         * Redistributions qualify as "Open Source" under  one of the following terms:
013:         *   
014:         *    Redistributions are made at no charge beyond the reasonable cost of
015:         *    materials and delivery.
016:         *
017:         *    Redistributions are accompanied by a copy of the Source Code or by an
018:         *    irrevocable offer to provide a copy of the Source Code for up to three
019:         *    years at the cost of materials and delivery.  Such redistributions
020:         *    must allow further use, modification, and redistribution of the Source
021:         *    Code under substantially the same terms as this license.
022:         *
023:         * Redistributions of source code must retain the copyright notices as they
024:         * appear in each source code file, these license terms, and the
025:         * disclaimer/limitation of liability set forth as paragraph 6 below.
026:         *
027:         * Redistributions in binary form must reproduce this Copyright Notice,
028:         * these license terms, and the disclaimer/limitation of liability set
029:         * forth as paragraph 6 below, in the documentation and/or other materials
030:         * provided with the distribution.
031:         *
032:         * The Software is provided on an "AS IS" basis.  No warranty is
033:         * provided that the Software is free of defects, or fit for a
034:         * particular purpose.  
035:         *
036:         * Limitation of Liability. Quadcap Software shall not be liable
037:         * for any damages suffered by the Licensee or any third party resulting
038:         * from use of the Software.
039:         */
040:
041:        import java.io.*;
042:
043:        import com.quadcap.util.Debug;
044:        import com.quadcap.util.Util;
045:
046:        /**
047:         * A filter output stream that tees off its output to a log file
048:         *
049:         * @author Stan Bailes
050:         */
051:
052:        public class LogOutputStream extends OutputStream {
053:            OutputStream out;
054:            OutputStream log;
055:            byte[] prefix;
056:            boolean bol = true;
057:
058:            /**
059:             * Construct a new log output stream
060:             *
061:             * @param os the underlying output stream
062:             * @param log the log stream
063:             * @param prefix a string identifying this log stream to be prefixed
064:             *		to every line output by this filter.
065:             */
066:            public LogOutputStream(OutputStream os, OutputStream log,
067:                    String prefix) {
068:                this .out = os;
069:                this .log = log;
070:                this .prefix = prefix.getBytes();
071:            }
072:
073:            /**
074:             * Write a byte.
075:             *
076:             * @param b the byte.
077:             * @exception IOException may be thrown.
078:             */
079:            synchronized public void write(int b) throws IOException {
080:                out.write(b);
081:                if (bol)
082:                    log.write(prefix);
083:                log.write(b);
084:                bol = (b == '\n');
085:            }
086:
087:            /**
088:             * Write a buffer
089:             *
090:             * @param b the buffer
091:             * @param off the index of the first byte in the buffer to write.
092:             * @param len the number of bytes to write.
093:             *
094:             * @exception IOException may be thrown.
095:             */
096:            synchronized public void write(byte[] b, int off, int len)
097:                    throws IOException {
098:                for (int i = 0; i < len; i++)
099:                    write(b[off + i]);
100:            }
101:
102:            /**
103:             * Write a buffer
104:             *
105:             * @param b the buffer
106:             *
107:             * @exception IOException may be thrown.
108:             */
109:            synchronized public void write(byte[] b) throws IOException {
110:                write(b, 0, b.length);
111:            }
112:
113:            /**
114:             * Close the underlying stream and the log output stream
115:             *
116:             * @exception IOException may be thrown
117:             */
118:            public void close() throws IOException {
119:                out.close();
120:                log.close();
121:            }
122:
123:            /**
124:             * Flush the underlying stream.
125:             *
126:             * @exception IOException may be thrown
127:             */
128:            public void flush() throws IOException {
129:                out.flush();
130:            }
131:        }
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