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
018 package org.apache.geronimo.system.logging.log4j;
019
020 import org.apache.commons.logging.Log;
021 import org.apache.log4j.Level;
022 import org.apache.log4j.Logger;
023
024 /**
025 * This log wrapper caches the trace, debug and info enabled flags. The flags are updated
026 * by a single timer task for all logs.
027 *
028 * @version $Rev: 476049 $ $Date: 2006-11-16 23:35:17 -0500 (Thu, 16 Nov 2006) $
029 */
030 public final class CachingLog4jLog implements Log {
031 private final String FQCN = getClass().getName();
032 private Logger logger;
033 private boolean traceEnabled;
034 private boolean debugEnabled;
035 private boolean infoEnabled;
036
037 public CachingLog4jLog(String name) {
038 logger = Logger.getLogger(name);
039 updateLevelInfo();
040 }
041
042 public CachingLog4jLog(Logger logger) {
043 this.logger = logger;
044 updateLevelInfo();
045 }
046
047 public boolean isTraceEnabled() {
048 return traceEnabled;
049 }
050
051 public void trace(Object message) {
052 if (traceEnabled) {
053 logger.log(FQCN, XLevel.TRACE, message, null);
054 }
055 }
056
057 public void trace(Object message, Throwable throwable) {
058 if (traceEnabled) {
059 logger.log(FQCN, XLevel.TRACE, message, throwable);
060 }
061 }
062
063 public boolean isDebugEnabled() {
064 return debugEnabled;
065 }
066
067 public void debug(Object message) {
068 if (debugEnabled) {
069 logger.log(FQCN, Level.DEBUG, message, null);
070 }
071 }
072
073 public void debug(Object message, Throwable throwable) {
074 if (debugEnabled) {
075 logger.log(FQCN, Level.DEBUG, message, throwable);
076 }
077 }
078
079 public boolean isInfoEnabled() {
080 return infoEnabled;
081 }
082
083 public void info(Object message) {
084 if (infoEnabled) {
085 logger.log(FQCN, Level.INFO, message, null);
086 }
087 }
088
089 public void info(Object message, Throwable throwable) {
090 if (infoEnabled) {
091 logger.log(FQCN, Level.INFO, message, throwable);
092 }
093 }
094
095 public boolean isWarnEnabled() {
096 return logger.isEnabledFor(Level.WARN);
097 }
098
099 public void warn(Object message) {
100 logger.log(FQCN, Level.WARN, message, null);
101 }
102
103 public void warn(Object message, Throwable throwable) {
104 logger.log(FQCN, Level.WARN, message, throwable);
105 }
106
107 public boolean isErrorEnabled() {
108 return logger.isEnabledFor(Level.ERROR);
109 }
110
111 public void error(Object message) {
112 logger.log(FQCN, Level.ERROR, message, null);
113 }
114
115 public void error(Object message, Throwable throwable) {
116 logger.log(FQCN, Level.ERROR, message, throwable);
117 }
118
119 public boolean isFatalEnabled() {
120 return logger.isEnabledFor(Level.FATAL);
121 }
122
123 public void fatal(Object message) {
124 logger.log(FQCN, Level.FATAL, message, null);
125 }
126
127 public void fatal(Object message, Throwable throwable) {
128 logger.log(FQCN, Level.FATAL, message, throwable);
129 }
130
131 public void updateLevelInfo() {
132 // This method is proposely not synchronized.
133 // The setting of a boolean is atomic so we don't have to worry about inconsistent state.
134 // Normally we would have to worry about an out of date cache running threads (SMP boxes),
135 // but this cache is not time critical (so don't worry about it).
136 traceEnabled = logger.isEnabledFor(XLevel.TRACE);
137 debugEnabled = logger.isDebugEnabled();
138 infoEnabled = logger.isInfoEnabled();
139 }
140 }