to.etc.domui.log.tailer

Class LogTailerTask

java.lang.Object

to.etc.domui.log.tailer.LogTailerTask

All Implemented Interfaces:

IConversationStateListener

public class LogTailerTask
extends Object
implements IConversationStateListener

This will run a "tail -f xxxx" operation through an ssh session to a remote system. The ssh session will run in a separate thread and will be kept alive for the time this instance is active. To support looking back into the log file the tail command will be used in such a way that the entire logfile is retrieved before starting in "follow" mode. The data is sent to a tempfile, and the code maintains a paging array of the tempfile's location every 100 lines.

Author:

Frits Jalvingh Created on Sep 2, 2012

Constructor Summary

Constructors

Constructor and Description
LogTailerTask(String logpath)

Method Summary

Modifier and Type	Method and Description
void	conversationAttached(ConversationContext cc)
void	conversationDestroyed(ConversationContext cc)
void	conversationDetached(ConversationContext cc)
void	conversationNew(ConversationContext cc)
int	getLastLine() Return the file total lines count.
List<String>	getLines(int first, int last) Get the specified #of lines from the set.
long	getSize() Return the file size.
void	readFileDelta() Read file for delta changes.
boolean	start()

Methods inherited from class java.lang.Object

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

Constructor Detail

LogTailerTask

public LogTailerTask(@Nonnull
                     String logpath)

Method Detail

start

public boolean start()
              throws Exception

Throws:

Exception

getLastLine

public int getLastLine()

Return the file total lines count.

Returns:

getSize

public long getSize()

Return the file size.

Returns:

readFileDelta

public void readFileDelta()
                   throws IOException

Read file for delta changes.

Throws:

IOException

getLines

public List<String> getLines(int first,
                             int last)
                      throws IOException

Get the specified #of lines from the set.

Parameters:

first -

last -

Returns:

Throws:

Exception

IOException

conversationNew

public void conversationNew(@Nonnull
                            ConversationContext cc)
                     throws Exception

Specified by:

conversationNew in interface IConversationStateListener

Throws:

Exception

conversationAttached

public void conversationAttached(@Nonnull
                                 ConversationContext cc)
                          throws Exception

Specified by:

conversationAttached in interface IConversationStateListener

Throws:

Exception

conversationDetached

public void conversationDetached(@Nonnull
                                 ConversationContext cc)
                          throws Exception

Specified by:

conversationDetached in interface IConversationStateListener

Throws:

Exception

conversationDestroyed

public void conversationDestroyed(@Nonnull
                                  ConversationContext cc)
                           throws Exception

Specified by:

conversationDestroyed in interface IConversationStateListener

Throws:

Exception