Source Code Cross Referenced for LoggerControllerImpl.java in  » Science » Cougaar12_4 » org » cougaar » util » log » log4j » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Science » Cougaar12_4 » org.cougaar.util.log.log4j 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * <copyright>
003:         *  
004:         *  Copyright 2001-2004 BBNT Solutions, LLC
005:         *  under sponsorship of the Defense Advanced Research Projects
006:         *  Agency (DARPA).
007:         * 
008:         *  You can redistribute this software and/or modify it under the
009:         *  terms of the Cougaar Open Source License as published on the
010:         *  Cougaar Open Source Website (www.cougaar.org).
011:         * 
012:         *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
013:         *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
014:         *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
015:         *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
016:         *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
017:         *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
018:         *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
019:         *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
020:         *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
021:         *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
022:         *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
023:         *  
024:         * </copyright>
025:         */
026:
027:        package org.cougaar.util.log.log4j;
028:
029:        import java.io.OutputStream;
030:        import java.util.Enumeration;
031:        import java.util.HashSet;
032:        import java.util.Vector;
033:
034:        import org.apache.log4j.Appender;
035:        import org.apache.log4j.ConsoleAppender;
036:        import org.apache.log4j.FileAppender;
037:        import org.apache.log4j.Level;
038:        import org.apache.log4j.LogManager;
039:        import org.apache.log4j.Logger;
040:        import org.apache.log4j.WriterAppender;
041:        import org.cougaar.util.log.LogTarget;
042:        import org.cougaar.util.log.LoggerController;
043:
044:        /**
045:         * Package-private log4j implementation of a logger-controller.
046:         * <p>
047:         * Note that log4j uses static methods to control its logging,
048:         * such as "Logger.*" methods.
049:         */
050:        class LoggerControllerImpl implements  LoggerController {
051:
052:            private String name;
053:            private Logger cat;
054:
055:            public LoggerControllerImpl() {
056:                // must get a logger-controller!
057:            }
058:
059:            public LoggerControllerImpl(String name) {
060:                this .name = name;
061:                if ("root".equals(name)) {
062:                    this .cat = Logger.getRootLogger();
063:                } else {
064:                    this .cat = Logger.getLogger(name);
065:                }
066:            }
067:
068:            /**
069:             * Special "static" method to get a named logger.
070:             * <p>
071:             * This should be moved to a different interface...
072:             */
073:            public LoggerController getLoggerController(String o) {
074:                return new LoggerControllerImpl(o);
075:            }
076:
077:            /**
078:             * Special "static" method to get the names of all loggers.
079:             * <p>
080:             * This should be moved to a different interface...
081:             */
082:            public Enumeration getAllLoggerNames() {
083:                HashSet s = new HashSet();
084:                Enumeration cats = LogManager.getCurrentLoggers();
085:                while (cats.hasMoreElements()) {
086:                    Logger c = (Logger) cats.nextElement();
087:                    while (c != null) {
088:                        Enumeration appenders = c.getAllAppenders();
089:                        if (appenders.hasMoreElements()) {
090:                            s.add(c.getName());
091:                        }
092:                        Logger rootC = Logger.getRootLogger();
093:                        if (c == rootC) {
094:                            c = null;
095:                        } else {
096:                            c = rootC;
097:                        }
098:                    }
099:                }
100:                Vector v = new Vector(s);
101:                return v.elements();
102:            }
103:
104:            /**
105:             * Get the logging level.
106:             *
107:             * @return a Logger level constant (DEBUG, INFO, etc)
108:             *
109:             * @see Logger
110:             */
111:            public int getLoggingLevel() {
112:                Level p = cat.getEffectiveLevel();
113:                return Util.convertLevelToInt(p);
114:            }
115:
116:            /**
117:             * Set the logging level.
118:             *
119:             * @param a Logger level constant (DEBUG, INFO, etc)
120:             *
121:             * @see Logger
122:             */
123:            public void setLoggingLevel(int level) {
124:                Level p = Util.convertIntToLevel(level);
125:                cat.setLevel(p);
126:            }
127:
128:            /**
129:             * Get an array of all LogTargets for this logger.
130:             *
131:             * return an array of {@link LogTarget} representing all
132:             * the various logging destinations.
133:             */
134:            public LogTarget[] getLogTargets() {
135:                Level p = cat.getEffectiveLevel();
136:                int loggingLevel = Util.convertLevelToInt(p);
137:                Enumeration appenders = cat.getAllAppenders();
138:
139:                Vector outputs = new Vector();
140:                while (appenders.hasMoreElements()) {
141:                    Appender a = (Appender) appenders.nextElement();
142:                    int outputType;
143:                    String outputDevice;
144:                    if (a instanceof  FileAppender) {
145:                        outputType = LogTarget.FILE;
146:                        outputDevice = ((FileAppender) a).getFile();
147:                    } else if (a instanceof  ConsoleAppender) {
148:                        outputType = LogTarget.CONSOLE;
149:                        outputDevice = null;
150:                    } else if (a.getClass() == WriterAppender.class) {
151:                        outputType = LogTarget.STREAM;
152:                        outputDevice = a.getName();
153:                    } else {
154:                        throw new RuntimeException("Unknown Appender type");
155:                    }
156:                    LogTarget lt = new LogTarget(this .name, outputType,
157:                            outputDevice, loggingLevel);
158:                    outputs.addElement(lt);
159:                }
160:
161:                int n = outputs.size();
162:                LogTarget[] lta = new LogTarget[n];
163:                for (int i = 0; i < n; i++) {
164:                    lta[i] = (LogTarget) outputs.elementAt(i);
165:                }
166:
167:                return lta;
168:            }
169:
170:            /**
171:             * Add a logging destination.
172:             *
173:             * @param outputType The output type either CONSOLE, FILE, or STREAM. See
174:             * constants above.
175:             * @param outputDevice The device associated with the particular output
176:             * type being added.  Null for Console, filename for FILE, the actual
177:             * output stream object for STREAM.
178:             *
179:             */
180:            public void addLogTarget(int outputType, Object outputDevice) {
181:                Appender a = Util
182:                        .convertIntToAppender(outputType, outputDevice);
183:                cat.addAppender(a);
184:            }
185:
186:            /**
187:             * Add a console output type to this logger.
188:             * <p>
189:             * This is equivalent to:<pre>
190:             *   addLogTarget(LogTarget.CONSOLE, null);</pre>
191:             */
192:            public void addConsole() {
193:                addLogTarget(LogTarget.CONSOLE, null);
194:            }
195:
196:            /**
197:             * Remove a logging output type.
198:             *
199:             * @param outputType The output type either CONSOLE, FILE, or STREAM of
200:             * logging output to be removed. See constants above.
201:             * @param outputDevice The device associated with the particular output
202:             * type being removed.  Null for Console, filename for FILE, the actual
203:             * output stream object for STREAM.
204:             */
205:            public boolean removeLogTarget(int outputType, Object outputDevice) {
206:                String deviceString;
207:                if (outputType == LogTarget.FILE) {
208:                    deviceString = (String) outputDevice;
209:                } else if (outputType == LogTarget.STREAM) {
210:                    // FIXME this use of hashcode is fishy:
211:                    int id = ((OutputStream) outputDevice).hashCode();
212:                    deviceString = Integer.toString(id);
213:                } else {
214:                    deviceString = null;
215:                }
216:                return removeLogTarget(outputType, deviceString);
217:            }
218:
219:            /**
220:             * Remove a logging output type.
221:             * 
222:             * This method is usually used in conjunction with 
223:             * {@link LoggerController#getLogTargets()} to
224:             * iterate through list to remove items.
225:             *
226:             * @param outputType - The output type either CONSOLE, FILE, or STREAM of
227:             * logging output to be removed. See constants above.
228:             * @param deviceString - The device associated with the particular output
229:             * type being removed.  Null for Console, filename for FILE,
230:             * the String identifier name associated with the output stream.
231:             */
232:            public boolean removeLogTarget(int outputType, String deviceString) {
233:                Enumeration appenders = cat.getAllAppenders();
234:
235:                Appender matchingAppender = null;
236:                Class findClass = Util.convertIntToAppenderType(outputType);
237:                while (appenders.hasMoreElements()) {
238:                    Appender appender = (Appender) appenders.nextElement();
239:                    if (appender.getClass() == findClass) {
240:                        if ((appender instanceof  ConsoleAppender)
241:                                || ((appender instanceof  FileAppender) && (((FileAppender) appender)
242:                                        .getFile().equals(deviceString)))) {
243:                            matchingAppender = appender;
244:                        } else if (appender.getName().equals(deviceString)) {
245:                            matchingAppender = appender;
246:                        }
247:                    }
248:                }
249:
250:                if (matchingAppender != null) {
251:                    cat.removeAppender(matchingAppender);
252:                    return true;
253:                } else {
254:                    return false;
255:                }
256:            }
257:        }
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