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

Class PBImageDelimitedTextWriter

java.lang.Object

org.apache.hadoop.hdfs.tools.offlineImageViewer.PBImageDelimitedTextWriter

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class PBImageDelimitedTextWriter
extends java.lang.Object

A PBImageDelimitedTextWriter generates a text representation of the PB fsimage, with each element separated by a delimiter string. All of the elements common to both inodes and inodes-under-construction are included. When processing an fsimage with a layout version that did not include an element, such as AccessTime, the output file will include a column for the value, but no value will be included. Individual block information for each file is not currently included. The default delimiter is tab, as this is an unlikely value to be included in an inode path or other text metadata. The delimiter value can be via the constructor.

Method Summary

Modifier and Type	Method	Description
void	afterOutput()	Method called at the end of output() phase after all the inodes with known parentPath has been printed out.
protected void	buildNamespace(java.io.InputStream in, java.util.List<java.lang.Long> refIdList)	Scan the INodeDirectory section to construct the namespace.
protected void	checkNode(FsImageProto.INodeSection.INode p, java.util.concurrent.atomic.AtomicInteger numDirs)	Checks the inode (saves if directory), and counts them.
void	close()
java.lang.String	getEntry(java.lang.String parent, FsImageProto.INodeSection.INode inode)	Get text output for the given inode.
java.lang.String	getErasureCodingPolicyName(FsImageProto.INodeSection.XAttrFeatureProto xattrFeatureProto)
java.lang.String	getHeader()	Get text output for the header line.
protected org.apache.hadoop.fs.permission.PermissionStatus	getPermission(long perm)
int	getStoragePolicy(FsImageProto.INodeSection.XAttrFeatureProto xattrFeatureProto)
static void	mergeFiles(java.lang.String[] srcPaths, java.lang.String resultPath)
protected java.io.PrintStream	serialOutStream()
void	visit(java.lang.String filePath)

Methods inherited from class java.lang.Object

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

Method Detail

getEntry

public java.lang.String getEntry(java.lang.String parent,
                                 FsImageProto.INodeSection.INode inode)

Get text output for the given inode.

Parameters:

parent - the path of parent directory

inode - the INode object to output.

getHeader

public java.lang.String getHeader()

Get text output for the header line.

afterOutput

public void afterOutput()

Method called at the end of output() phase after all the inodes with known parentPath has been printed out. Can be used to print additional data depending on the written inodes.

serialOutStream

protected java.io.PrintStream serialOutStream()

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.io.Closeable

Throws:

java.io.IOException

visit

public void visit(java.lang.String filePath)
           throws java.io.IOException

Throws:

java.io.IOException

getPermission

protected org.apache.hadoop.fs.permission.PermissionStatus getPermission(long perm)

checkNode

protected void checkNode(FsImageProto.INodeSection.INode p,
                         java.util.concurrent.atomic.AtomicInteger numDirs)
                  throws java.io.IOException

Checks the inode (saves if directory), and counts them. Can be overridden if additional steps are taken when iterating through INodeSection.

Throws:

java.io.IOException

buildNamespace

protected void buildNamespace(java.io.InputStream in,
                              java.util.List<java.lang.Long> refIdList)
                       throws java.io.IOException

Scan the INodeDirectory section to construct the namespace.

Throws:

java.io.IOException

getStoragePolicy

public int getStoragePolicy(FsImageProto.INodeSection.XAttrFeatureProto xattrFeatureProto)

mergeFiles

public static void mergeFiles(java.lang.String[] srcPaths,
                              java.lang.String resultPath)
                       throws java.io.IOException

Parameters:

srcPaths - Source files of contents to be merged

resultPath - Merged file path

Throws:

java.io.IOException

getErasureCodingPolicyName

public java.lang.String getErasureCodingPolicyName(FsImageProto.INodeSection.XAttrFeatureProto xattrFeatureProto)