Package org.apache.hadoop.hdfs.tools.offlineEditsViewer

Class BinaryEditsVisitor

java.lang.Object

org.apache.hadoop.hdfs.tools.offlineEditsViewer.BinaryEditsVisitor

All Implemented Interfaces:

OfflineEditsVisitor

@Private
@Unstable
public class BinaryEditsVisitor
extends Object
implements OfflineEditsVisitor

BinaryEditsVisitor implements a binary EditsVisitor

Constructor Summary

Constructors

Constructor	Description
BinaryEditsVisitor(String outputName)	Create a processor that writes to a given file

Method Summary

Modifier and Type	Method	Description
void	close(Throwable error)	Finish the visitor
void	start(int version)	Start the visitor (initialization)
void	visitOp(FSEditLogOp op)	Begin visiting an element that encloses another element, such as the beginning of the list of blocks that comprise a file.

Methods inherited from class java.lang.Object

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

Constructor Details

BinaryEditsVisitor

public BinaryEditsVisitor(String outputName)
                   throws IOException

Create a processor that writes to a given file

Parameters:

outputName - Name of file to write output to

Throws:

IOException

Method Details

start

public void start(int version)
           throws IOException

Start the visitor (initialization)

Specified by:

start in interface OfflineEditsVisitor

Parameters:

version - Edit log version

Throws:

IOException

close

public void close(Throwable error)
           throws IOException

Finish the visitor

Specified by:

close in interface OfflineEditsVisitor

Parameters:

error - If the visitor was closed because of an unrecoverable error in the input stream, this is the exception.

Throws:

IOException

visitOp

public void visitOp(FSEditLogOp op)
             throws IOException

Description copied from interface: OfflineEditsVisitor

Begin visiting an element that encloses another element, such as the beginning of the list of blocks that comprise a file.

Specified by:

visitOp in interface OfflineEditsVisitor

Parameters:

op - Token being visited

Throws:

IOException