/*! ******************************************************************************
*
* 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.
*
******************************************************************************/
package org.pentaho.di.core.logging;
import java.io.OutputStream;
import java.util.List;
import org.apache.commons.vfs2.FileObject;
import org.pentaho.di.core.Const;
import org.pentaho.di.core.exception.KettleException;
import org.pentaho.di.core.vfs.KettleVFS;
public class FileLoggingEventListener implements KettleLoggingEventListener {
private String filename;
private FileObject file;
public FileObject getFile() {
return file;
}
private OutputStream outputStream;
private KettleLogLayout layout;
private KettleException exception;
private String logChannelId;
/**
* Log all log lines to the specified file
*
* @param filename
* @param append
* @throws KettleException
*/
public FileLoggingEventListener( String filename, boolean append ) throws KettleException {
this( null, filename, append );
}
/**
* Log only lines belonging to the specified log channel ID or one of it's children (grandchildren) to the specified
* file.
*
* @param logChannelId
* @param filename
* @param append
* @throws KettleException
*/
public FileLoggingEventListener( String logChannelId, String filename, boolean append ) throws KettleException {
this.logChannelId = logChannelId;
this.filename = filename;
this.layout = new KettleLogLayout( true );
this.exception = null;
file = KettleVFS.getFileObject( filename );
outputStream = null;
try {
outputStream = KettleVFS.getOutputStream( file, append );
} catch ( Exception e ) {
throw new KettleException(
"Unable to create a logging event listener to write to file '" + filename + "'", e );
}
}
@Override
public void eventAdded( KettleLoggingEvent event ) {
try {
Object messageObject = event.getMessage();
if ( messageObject instanceof LogMessage ) {
boolean logToFile = false;
if ( logChannelId == null ) {
logToFile = true;
} else {
LogMessage message = (LogMessage) messageObject;
// This should be fast enough cause cached.
List<String> logChannelChildren = LoggingRegistry.getInstance().getLogChannelChildren( logChannelId );
// This could be non-optimal, consider keeping the list sorted in the logging registry
logToFile = Const.indexOfString( message.getLogChannelId(), logChannelChildren ) >= 0;
}
if ( logToFile ) {
String logText = layout.format( event );
outputStream.write( logText.getBytes() );
outputStream.write( Const.CR.getBytes() );
}
}
} catch ( Exception e ) {
exception = new KettleException( "Unable to write to logging event to file '" + filename + "'", e );
}
}
public void close() throws KettleException {
try {
if ( outputStream != null ) {
outputStream.close();
}
} catch ( Exception e ) {
throw new KettleException( "Unable to close output of file '" + filename + "'", e );
}
}
public KettleException getException() {
return exception;
}
public void setException( KettleException exception ) {
this.exception = exception;
}
public String getFilename() {
return filename;
}
public void setFilename( String filename ) {
this.filename = filename;
}
public OutputStream getOutputStream() {
return outputStream;
}
public void setOutputStream( OutputStream outputStream ) {
this.outputStream = outputStream;
}
}