| 1 | package org.apache.velocity.runtime.log; |
| 2 | |
| 3 | /* |
| 4 | * Copyright 2001,2004 The Apache Software Foundation. |
| 5 | * |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | */ |
| 18 | |
| 19 | import java.io.File; |
| 20 | |
| 21 | import org.apache.log.Priority; |
| 22 | import org.apache.log.Logger; |
| 23 | import org.apache.log.Hierarchy; |
| 24 | import org.apache.log.LogTarget; |
| 25 | import org.apache.log.output.io.FileTarget; |
| 26 | |
| 27 | import org.apache.velocity.runtime.RuntimeServices; |
| 28 | import org.apache.velocity.runtime.RuntimeConstants; |
| 29 | |
| 30 | /** |
| 31 | * Implementation of a Avalon logger. |
| 32 | * |
| 33 | * @author <a href="mailto:jon@latchkey.com">Jon S. Stevens</a> |
| 34 | * @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a> |
| 35 | * @version $Id: AvalonLogSystem.java,v 1.12.4.1 2004/03/03 23:22:56 geirm Exp $ |
| 36 | */ |
| 37 | public class AvalonLogSystem implements LogSystem |
| 38 | { |
| 39 | private Logger logger = null; |
| 40 | |
| 41 | private RuntimeServices rsvc = null; |
| 42 | |
| 43 | /** |
| 44 | * default CTOR. Initializes itself using the property RUNTIME_LOG |
| 45 | * from the Velocity properties |
| 46 | */ |
| 47 | |
| 48 | public AvalonLogSystem() |
| 49 | { |
| 50 | } |
| 51 | |
| 52 | public void init( RuntimeServices rs ) |
| 53 | throws Exception |
| 54 | { |
| 55 | this.rsvc = rs; |
| 56 | |
| 57 | /* |
| 58 | * if a logger is specified, we will use this instead of |
| 59 | * the default |
| 60 | */ |
| 61 | String loggerName = (String) rsvc.getProperty("runtime.log.logsystem.avalon.logger"); |
| 62 | |
| 63 | if (loggerName != null) |
| 64 | { |
| 65 | this.logger = Hierarchy.getDefaultHierarchy().getLoggerFor(loggerName); |
| 66 | } |
| 67 | else |
| 68 | { |
| 69 | /* |
| 70 | * since this is a Velocity-provided logger, we will |
| 71 | * use the Runtime configuration |
| 72 | */ |
| 73 | String logfile = (String) rsvc.getProperty( RuntimeConstants.RUNTIME_LOG ); |
| 74 | |
| 75 | /* |
| 76 | * now init. If we can't, panic! |
| 77 | */ |
| 78 | try |
| 79 | { |
| 80 | init( logfile ); |
| 81 | |
| 82 | logVelocityMessage( 0, |
| 83 | "AvalonLogSystem initialized using logfile '" + logfile + "'" ); |
| 84 | } |
| 85 | catch( Exception e ) |
| 86 | { |
| 87 | System.out.println( |
| 88 | "PANIC : Error configuring AvalonLogSystem : " + e ); |
| 89 | System.err.println( |
| 90 | "PANIC : Error configuring AvalonLogSystem : " + e ); |
| 91 | |
| 92 | throw new Exception("Unable to configure AvalonLogSystem : " + e ); |
| 93 | } |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * initializes the log system using the logfile argument |
| 99 | * |
| 100 | * @param logFile file for log messages |
| 101 | */ |
| 102 | public void init(String logFile) |
| 103 | throws Exception |
| 104 | { |
| 105 | |
| 106 | /* |
| 107 | * make our FileTarget. Note we are going to keep the |
| 108 | * default behavior of not appending... |
| 109 | */ |
| 110 | FileTarget target = new FileTarget( new File( logFile), |
| 111 | false, |
| 112 | new VelocityFormatter("%{time} %{message}\\n%{throwable}" ) ); |
| 113 | |
| 114 | /* |
| 115 | * use the toString() of RuntimeServices to make a unique logger |
| 116 | */ |
| 117 | |
| 118 | logger = Hierarchy.getDefaultHierarchy().getLoggerFor( rsvc.toString() ); |
| 119 | logger.setPriority( Priority.DEBUG ); |
| 120 | logger.setLogTargets( new LogTarget[] { target } ); |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * logs messages |
| 125 | * |
| 126 | * @param level severity level |
| 127 | * @param message complete error message |
| 128 | */ |
| 129 | public void logVelocityMessage(int level, String message) |
| 130 | { |
| 131 | /* |
| 132 | * based on level, call teh right logger method |
| 133 | * and prefix with the appropos prefix |
| 134 | */ |
| 135 | |
| 136 | switch (level) |
| 137 | { |
| 138 | case LogSystem.WARN_ID: |
| 139 | logger.warn( RuntimeConstants.WARN_PREFIX + message ); |
| 140 | break; |
| 141 | case LogSystem.INFO_ID: |
| 142 | logger.info( RuntimeConstants.INFO_PREFIX + message); |
| 143 | break; |
| 144 | case LogSystem.DEBUG_ID: |
| 145 | logger.debug( RuntimeConstants.DEBUG_PREFIX + message); |
| 146 | break; |
| 147 | case LogSystem.ERROR_ID: |
| 148 | logger.error(RuntimeConstants.ERROR_PREFIX + message); |
| 149 | break; |
| 150 | default: |
| 151 | logger.info( message); |
| 152 | break; |
| 153 | } |
| 154 | } |
| 155 | } |