org.jalore
Class MultiLogReader

java.lang.Object
  org.jalore.MultiLogReader

All Implemented Interfaces:

LogReader

public class MultiLogReader
extends java.lang.Object
implements LogReader

A LogReader reading log messages from multiple sources.

To determine which message is next, this log reader sorts next messages from available sources with a given criteria, for example the timestamp found in log messages, and returns the first one.

Author:

Nicolas Dutertry

Constructor Summary

MultiLogReader(java.util.List<LogReader> logReaders, java.util.Comparator<LogMessage> comparator)

MultiLogReader(java.util.List<LogReader> logReaders, java.lang.String compareProperty)

Method Summary

boolean	hasMoreMessages() Tests if this reader contains more log messages.
LogMessage	nextMessage() Returns the next log message of this reader or null if no more message is available.

Methods inherited from class java.lang.Object

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

Constructor Detail

MultiLogReader

public MultiLogReader(java.util.List<LogReader> logReaders,
                      java.lang.String compareProperty)

MultiLogReader

public MultiLogReader(java.util.List<LogReader> logReaders,
                      java.util.Comparator<LogMessage> comparator)

Method Detail

hasMoreMessages

public boolean hasMoreMessages()

Description copied from interface: LogReader

Tests if this reader contains more log messages.

Specified by:

hasMoreMessages in interface LogReader

Returns:

true if and only if this reader contains at least one more log message to provide; false otherwise.

nextMessage

public LogMessage nextMessage()
                       throws java.io.IOException

Description copied from interface: LogReader

Returns the next log message of this reader or null if no more message is available.

Specified by:

nextMessage in interface LogReader

Returns:

the next log message

Throws:

java.io.IOException - if an error occurred while reading the next message