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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