org.apache.hadoop.hdfs.tools.offlineImageViewer

Class OfflineImageViewer

java.lang.Object

org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewer

@InterfaceAudience.Private
public class OfflineImageViewer
extends Object

OfflineImageViewer to dump the contents of an Hadoop image file to XML or the console. Main entry point into utility, either via the command line or programatically.

Field Summary

Fields

Modifier and Type	Field and Description
static org.apache.commons.logging.Log	LOG

Constructor Summary

Constructors

Constructor and Description
OfflineImageViewer(String inputFile, org.apache.hadoop.hdfs.tools.offlineImageViewer.ImageVisitor processor, boolean skipBlocks)

Method Summary

Methods

Modifier and Type	Method and Description
static org.apache.commons.cli.Options	buildOptions() Build command-line options and descriptions
void	go() Process image file.
static void	main(String[] args) Entry point to command-line-driven operation.

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.apache.commons.logging.Log LOG

Constructor Detail

OfflineImageViewer

public OfflineImageViewer(String inputFile,
                  org.apache.hadoop.hdfs.tools.offlineImageViewer.ImageVisitor processor,
                  boolean skipBlocks)

Method Detail

go

public void go()
        throws IOException

Process image file.

Throws:

IOException

buildOptions

public static org.apache.commons.cli.Options buildOptions()

Build command-line options and descriptions

main

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

Entry point to command-line-driven operation. User may specify options and start fsimage viewer from the command line. Program will process image file and exit cleanly or, if an error is encountered, inform user and exit.

Parameters:

args - Command line options

Throws:

IOException