org.oreodata.standalone
Class DefaultDataLogger

java.lang.Object
  |
  +--org.oreodata.standalone.DefaultDataLogger

All Implemented Interfaces:

DataListener, DataLogger, java.util.EventListener

public class DefaultDataLogger

extends java.lang.Object

implements DataLogger

A DataListener implementation that logs data events to a file.

Author:

Jonathan Revusky

Constructor Summary

DefaultDataLogger(OreoDataSource dataSource, java.io.File logFile, boolean useXML, java.lang.String encoding)
Creates a new DefaultDataLogger

Method Summary

org.xml.sax.InputSource	asInputSource()
void	handleEvent(DataEvent event) handle the event when the OreoDataSource we are listening to has modified data
void	init(java.util.Properties properties) used in the startup phase to initialize the object based on properties.
protected void	logEventXML(DataEvent event) log the transaction in an XML format.
void	rotateLogs() Method that starts a new log file, archiving the present one etcetera.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DefaultDataLogger

public DefaultDataLogger(OreoDataSource dataSource,
                         java.io.File logFile,
                         boolean useXML,
                         java.lang.String encoding)
                  throws java.io.IOException

Creates a new DefaultDataLogger

Parameters:

dataSource - the data source to listen to.

logFile - the location of the file (must be writeable)

useXML - whether to log in XML format.

encoding - the character encoding (only applicable if useXML is true)

Method Detail

init

public void init(java.util.Properties properties)
          throws java.io.IOException

Description copied from interface: DataListener

used in the startup phase to initialize the object based on properties. Note that the properties are typically defined in an XML file.

Specified by:

init in interface DataListener

java.io.IOException

handleEvent

public void handleEvent(DataEvent event)
                 throws java.io.IOException

Description copied from interface: DataListener

handle the event when the OreoDataSource we are listening to has modified data

Specified by:

handleEvent in interface DataListener

java.io.IOException

logEventXML

protected void logEventXML(DataEvent event)
                    throws java.io.IOException

log the transaction in an XML format.

java.io.IOException

asInputSource

public org.xml.sax.InputSource asInputSource()
                                      throws java.io.IOException

Specified by:

asInputSource in interface DataLogger

Returns:

an InputSource for reloading a datasource from the log

java.io.IOException

rotateLogs

public void rotateLogs()
                throws java.io.IOException

Description copied from interface: DataLogger

Method that starts a new log file, archiving the present one etcetera.

Specified by:

rotateLogs in interface DataLogger

java.io.IOException