| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| LogWriter |
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| 4.714285714285714;4.714 | ||||
| LogWriter$1 |
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| 4.714285714285714;4.714 | ||||
| LogWriter$LogLevel |
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| 4.714285714285714;4.714 |
| 1 | /* | |
| 2 | * Copyright (c) 2008 | |
| 3 | * Jon Schewe. All rights reserved | |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without | |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * 1. Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer. | |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer in the | |
| 12 | * documentation and/or other materials provided with the distribution. | |
| 13 | * | |
| 14 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 24 | * SUCH DAMAGE. | |
| 25 | * | |
| 26 | * I'd appreciate comments/suggestions on the code jpschewe@mtu.net | |
| 27 | */ | |
| 28 | package net.mtu.eggplant.io; | |
| 29 | ||
| 30 | import java.io.IOException; | |
| 31 | import java.io.Writer; | |
| 32 | ||
| 33 | import org.slf4j.Logger; | |
| 34 | ||
| 35 | /** | |
| 36 | * Writer that outputs to the current logging facility (SLF4J). | |
| 37 | */ | |
| 38 | public class LogWriter extends Writer { | |
| 39 | ||
| 40 | private final Logger _logger; | |
| 41 | ||
| 42 | private final LogLevel _level; | |
| 43 | ||
| 44 | 0 | private final StringBuilder _text = new StringBuilder(); |
| 45 | ||
| 46 | /** | |
| 47 | * Log levels that {@link LogWriter} can output to. | |
| 48 | */ | |
| 49 | 0 | public enum LogLevel { |
| 50 | 0 | TRACE, DEBUG, INFO, WARN, ERROR |
| 51 | } | |
| 52 | ||
| 53 | /** | |
| 54 | * @param logger the logger to log to | |
| 55 | * @param level the level to log at | |
| 56 | * @throws NullPointerException if logger or level is null | |
| 57 | */ | |
| 58 | 0 | public LogWriter(final Logger logger, final LogLevel level) { |
| 59 | 0 | if (null == logger |
| 60 | || null == level) { | |
| 61 | 0 | throw new NullPointerException(); |
| 62 | } | |
| 63 | ||
| 64 | 0 | this._logger = logger; |
| 65 | 0 | this._level = level; |
| 66 | 0 | } |
| 67 | ||
| 68 | /** | |
| 69 | * @param lock the lock | |
| 70 | * @param logger the logger to log to | |
| 71 | * @param level the level to log at | |
| 72 | * @throws NullPointerException if logger or level is null | |
| 73 | */ | |
| 74 | public LogWriter(final Object lock, final Logger logger, final LogLevel level) { | |
| 75 | 0 | super(lock); |
| 76 | 0 | if (null == logger |
| 77 | || null == level) { | |
| 78 | 0 | throw new NullPointerException(); |
| 79 | } | |
| 80 | 0 | this._logger = logger; |
| 81 | 0 | this._level = level; |
| 82 | 0 | } |
| 83 | ||
| 84 | /** | |
| 85 | * @see java.io.Writer#close() | |
| 86 | */ | |
| 87 | @Override | |
| 88 | public void close() throws IOException { | |
| 89 | 0 | flush(); |
| 90 | 0 | } |
| 91 | ||
| 92 | /** | |
| 93 | * @see java.io.Writer#flush() | |
| 94 | */ | |
| 95 | @Override | |
| 96 | public void flush() throws IOException { | |
| 97 | 0 | if (isLogLevelEnabled()) { |
| 98 | 0 | final String s = _text.toString(); |
| 99 | 0 | if (s.length() > 0) { |
| 100 | 0 | log(s); |
| 101 | } | |
| 102 | } | |
| 103 | 0 | _text.setLength(0); |
| 104 | 0 | } |
| 105 | ||
| 106 | /** | |
| 107 | * @see java.io.Writer#write(char[], int, int) | |
| 108 | */ | |
| 109 | @Override | |
| 110 | public void write(final char[] cbuf, final int off, final int len) throws IOException { | |
| 111 | 0 | if (isLogLevelEnabled()) { |
| 112 | 0 | _text.append(cbuf, off, len); |
| 113 | } | |
| 114 | 0 | } |
| 115 | ||
| 116 | /** | |
| 117 | * Is the logging level that was specified in the constructor enabled? | |
| 118 | */ | |
| 119 | private boolean isLogLevelEnabled() { | |
| 120 | 0 | switch (_level) { |
| 121 | case TRACE: | |
| 122 | 0 | return _logger.isTraceEnabled(); |
| 123 | case DEBUG: | |
| 124 | 0 | return _logger.isDebugEnabled(); |
| 125 | case INFO: | |
| 126 | 0 | return _logger.isInfoEnabled(); |
| 127 | case WARN: | |
| 128 | 0 | return _logger.isWarnEnabled(); |
| 129 | case ERROR: | |
| 130 | 0 | return _logger.isErrorEnabled(); |
| 131 | default: | |
| 132 | 0 | throw new RuntimeException("Unknown log level: " |
| 133 | + _level); | |
| 134 | } | |
| 135 | } | |
| 136 | ||
| 137 | /** | |
| 138 | * Do the logging. | |
| 139 | */ | |
| 140 | private void log(final String s) { | |
| 141 | 0 | switch (_level) { |
| 142 | case TRACE: | |
| 143 | 0 | _logger.trace(s); |
| 144 | 0 | break; |
| 145 | case DEBUG: | |
| 146 | 0 | _logger.debug(s); |
| 147 | 0 | break; |
| 148 | case INFO: | |
| 149 | 0 | _logger.info(s); |
| 150 | 0 | break; |
| 151 | case WARN: | |
| 152 | 0 | _logger.warn(s); |
| 153 | 0 | break; |
| 154 | case ERROR: | |
| 155 | 0 | _logger.error(s); |
| 156 | 0 | break; |
| 157 | default: | |
| 158 | 0 | throw new RuntimeException("Unknown log level: " |
| 159 | + _level); | |
| 160 | } | |
| 161 | 0 | } |
| 162 | ||
| 163 | } |