runtime/org.argeo.slc.support.simple/src/main/java/org/argeo/slc/log4j/SlcExecutionAppender.java

   1 /*
   2  * Copyright (C) 2010 Mathieu Baudier <mbaudier@argeo.org>
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package org.argeo.slc.log4j;
  18
  19 import org.apache.log4j.AppenderSkeleton;
  20 import org.apache.log4j.Layout;
  21 import org.apache.log4j.Logger;
  22 import org.apache.log4j.PatternLayout;
  23 import org.apache.log4j.spi.LoggingEvent;
  24 import org.argeo.slc.core.execution.ExecutionThread;
  25 import org.argeo.slc.core.execution.ProcessThreadGroup;
  26 import org.argeo.slc.process.SlcExecutionStep;
  27 import org.springframework.beans.factory.DisposableBean;
  28 import org.springframework.beans.factory.InitializingBean;
  29
  30 /** Not meant to be used directly in standard log4j config */
  31 public class SlcExecutionAppender extends AppenderSkeleton implements
  32                 InitializingBean, DisposableBean {
  33
  34         private Layout layout = null;
  35         private String pattern = "%m - %c%n";
  36         private Boolean onlyExecutionThread = true;
  37
  38         public void afterPropertiesSet() {
  39                 if (layout != null)
  40                         setLayout(layout);
  41                 else
  42                         setLayout(new PatternLayout(pattern));
  43                 Logger.getRootLogger().addAppender(this);
  44         }
  45
  46         @Override
  47         protected void append(LoggingEvent event) {
  48                 Thread currentThread = Thread.currentThread();
  49                 if (currentThread.getThreadGroup() instanceof ProcessThreadGroup) {
  50                         if (onlyExecutionThread
  51                                         && !(currentThread instanceof ExecutionThread))
  52                                 return;
  53                         ((ProcessThreadGroup) currentThread.getThreadGroup())
  54                                         .dispatchAddStep(new SlcExecutionStep(layout.format(event)));
  55                 }
  56         }
  57
  58         public void destroy() throws Exception {
  59                 Logger.getRootLogger().removeAppender(this);
  60         }
  61
  62         public void close() {
  63         }
  64
  65         public boolean requiresLayout() {
  66                 return false;
  67         }
  68
  69         public void setLayout(Layout layout) {
  70                 this.layout = layout;
  71         }
  72
  73         public void setPattern(String pattern) {
  74                 this.pattern = pattern;
  75         }
  76
  77         public void setOnlyExecutionThread(Boolean onlyExecutionThread) {
  78                 this.onlyExecutionThread = onlyExecutionThread;
  79         }
  80
  81 }