com.bigdata.ha.althalog

Class HALogManager

java.lang.Object

com.bigdata.ha.althalog.HALogManager

public class HALogManager
extends Object

Provides the top level control

Author:

Martyn Cutcher

Constructor Summary

Constructors

Constructor and Description
HALogManager(File halogdir)

Method Summary

Methods

Modifier and Type	Method and Description
HALogFile	createLog(IRootBlockView rbv)
void	disable() Closes and removes the current writer
File	getCurrentFile() Utility to retrieve a File reference to the current open file
File	getHALogDir()
HALogFile	getHALogFile(long commitCounter) Returns the HALogFile for the commitCounter if it exists.
HALogFile	getOpenLogFile()
IHALogReader	getReader(long commitCounter)
static void	main(String[] args) Utility program will dump log files (or directories containing log files) provided as arguments.

Methods inherited from class java.lang.Object

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

Constructor Detail

HALogManager

public HALogManager(File halogdir)

Method Detail

createLog

public HALogFile createLog(IRootBlockView rbv)
                    throws IOException

Throws:

IOException

getOpenLogFile

public HALogFile getOpenLogFile()

Returns:

the the open HALogFile

getCurrentFile

public File getCurrentFile()

Utility to retrieve a File reference to the current open file

Returns:

getHALogDir

public File getHALogDir()

Returns:

the directory used to store the log files

getReader

public IHALogReader getReader(long commitCounter)
                       throws IOException

Throws:

IOException

getHALogFile

public HALogFile getHALogFile(long commitCounter)
                       throws FileNotFoundException

Returns the HALogFile for the commitCounter if it exists. It will return either the current or an historical file

Parameters:

commitCounter -

Returns:

the HALogFile for this commit counter

Throws:

FileNotFoundException

disable

public void disable()
             throws IOException

Closes and removes the current writer

Throws:

IOException

main

public static void main(String[] args)
                 throws IOException,
                        InterruptedException

Utility program will dump log files (or directories containing log files) provided as arguments.

Parameters:

args - Zero or more files or directories.

Throws:

IOException

InterruptedException