Package org.apache.hadoop.hdfs.tools.offlineImageViewer

Class OfflineImageViewer

java.lang.Object
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewer
@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 programmatically.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final org.slf4j.Logger
    LOG
     

  • Constructor Summary

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

  • Method Summary

    Modifier and Type
    Method
    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 Details

    • LOG

      public static final org.slf4j.Logger LOG

  • Constructor Details

    • OfflineImageViewer

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

  • Method Details

    • 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