Source Code Cross Referenced for HoldingLogChute.java in  » Template-Engine » Velocity » org » apache » velocity » runtime » log » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Template Engine » Velocity » org.apache.velocity.runtime.log 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        package org.apache.velocity.runtime.log;
002:
003:        /*
004:         * Licensed to the Apache Software Foundation (ASF) under one
005:         * or more contributor license agreements.  See the NOTICE file
006:         * distributed with this work for additional information
007:         * regarding copyright ownership.  The ASF licenses this file
008:         * to you under the Apache License, Version 2.0 (the
009:         * "License"); you may not use this file except in compliance
010:         * with the License.  You may obtain a copy of the License at
011:         *
012:         *   http://www.apache.org/licenses/LICENSE-2.0
013:         *
014:         * Unless required by applicable law or agreed to in writing,
015:         * software distributed under the License is distributed on an
016:         * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017:         * KIND, either express or implied.  See the License for the
018:         * specific language governing permissions and limitations
019:         * under the License.    
020:         */
021:
022:        import java.util.Vector;
023:        import java.util.Iterator;
024:        import org.apache.velocity.runtime.RuntimeServices;
025:
026:        /**
027:         *  Pre-init logger.  I believe that this was suggested by
028:         *  Carsten Ziegeler <cziegeler@sundn.de> and
029:         *  Jeroen C. van Gelderen.  If this isn't correct, let me
030:         *  know as this was a good idea...
031:         *
032:         * @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
033:         * @author <a href="mailto:nbubna@apache.org">Nathan Bubna</a>
034:         * @version $Id: HoldingLogChute.java 463298 2006-10-12 16:10:32Z henning $
035:         */
036:        class HoldingLogChute implements  LogChute {
037:            private Vector pendingMessages = new Vector();
038:
039:            /**
040:             * @see org.apache.velocity.runtime.log.LogChute#init(org.apache.velocity.runtime.RuntimeServices)
041:             */
042:            public void init(RuntimeServices rs) throws Exception {
043:            }
044:
045:            /**
046:             * Logs messages. All we do is store them until 'later'.
047:             *
048:             * @param level severity level
049:             * @param message complete error message
050:             */
051:            public void log(int level, String message) {
052:                synchronized (this ) {
053:                    Object[] data = new Object[2];
054:                    // TODO: JDK 1.4+ -> valueOf()
055:                    data[0] = new Integer(level);
056:                    data[1] = message;
057:                    pendingMessages.addElement(data);
058:                }
059:            }
060:
061:            /**
062:             * Logs messages and errors. All we do is store them until 'later'.
063:             *
064:             * @param level severity level
065:             * @param message complete error message
066:             * @param t the accompanying java.lang.Throwable
067:             */
068:            public void log(int level, String message, Throwable t) {
069:                synchronized (this ) {
070:                    Object[] data = new Object[3];
071:                    // TODO: JDK 1.4+ -> valueOf()
072:                    data[0] = new Integer(level);
073:                    data[1] = message;
074:                    data[2] = t;
075:                    pendingMessages.addElement(data);
076:                }
077:            }
078:
079:            /**
080:             * @see org.apache.velocity.runtime.log.LogChute#isLevelEnabled(int)
081:             */
082:            public boolean isLevelEnabled(int level) {
083:                return true;
084:            }
085:
086:            /**
087:             * Dumps the log messages this chute is holding into a new chute
088:             * @param newChute
089:             */
090:            public void transferTo(LogChute newChute) {
091:                synchronized (this ) {
092:                    if (!pendingMessages.isEmpty()) {
093:                        // iterate and log each individual message...
094:                        for (Iterator i = pendingMessages.iterator(); i
095:                                .hasNext();) {
096:                            Object[] data = (Object[]) i.next();
097:                            int level = ((Integer) data[0]).intValue();
098:                            String message = (String) data[1];
099:                            if (data.length == 2) {
100:                                newChute.log(level, message);
101:                            } else {
102:                                newChute.log(level, message,
103:                                        (Throwable) data[2]);
104:                            }
105:                        }
106:                    }
107:                }
108:            }
109:
110:        }
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