Log4jPipedAppender.java

/*! ******************************************************************************
*
* Pentaho Data Integration
*
* Copyright (C) 2002-2013 by Pentaho : http://www.pentaho.com
*
*******************************************************************************
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
*    http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
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package org.pentaho.di.core.logging;

import java.io.IOException;
import java.io.PipedOutputStream;

import org.apache.log4j.Appender;
import org.apache.log4j.Layout;
import org.apache.log4j.spi.ErrorHandler;
import org.apache.log4j.spi.Filter;
import org.apache.log4j.spi.LoggingEvent;
import org.pentaho.di.core.Const;

public class Log4jPipedAppender implements Appender {
  private Layout layout;
  private Filter filter;

  private String name;

  private PipedOutputStream pipedOutputStream;

  public Log4jPipedAppender() {
    pipedOutputStream = new PipedOutputStream();
  }

  public void addFilter( Filter filter ) {
    this.filter = filter;
  }

  public Filter getFilter() {
    return filter;
  }

  public void clearFilters() {
    filter = null;
  }

  public void close() {
    try {
      pipedOutputStream.close();
    } catch ( IOException e ) {
      System.out.println( "Unable to close piped output stream: " + e.getMessage() );
    }
  }

  public void doAppend( LoggingEvent event ) {
    String line = layout.format( event ) + Const.CR;
    try {
      pipedOutputStream.write( line.getBytes() );
    } catch ( IOException e ) {
      System.out.println( "Unable to write to piped output stream : " + e.getMessage() );
    }
  }

  public void setName( String name ) {
    this.name = name;
  }

  public String getName() {
    return name;
  }

  public void setErrorHandler( ErrorHandler arg0 ) {
  }

  public ErrorHandler getErrorHandler() {
    return null;
  }

  public void setLayout( Layout layout ) {
    this.layout = layout;
  }

  public Layout getLayout() {
    return layout;
  }

  public boolean requiresLayout() {
    return true;
  }

  public PipedOutputStream getPipedOutputStream() {
    return pipedOutputStream;
  }

  public void setPipedOutputStream( PipedOutputStream pipedOutputStream ) {
    this.pipedOutputStream = pipedOutputStream;
  }

  public void setFilter( Filter filter ) {
    this.filter = filter;
  }
}