Package org.apache.hadoop.hdfs.server.namenode.visitor

Class NamespacePrintVisitor

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.visitor.NamespacePrintVisitor

All Implemented Interfaces:

NamespaceVisitor

public final class NamespacePrintVisitor
extends Object
implements NamespaceVisitor

To print the namespace tree recursively for testing. \- foo (INodeDirectory@33dd2717) \- sub1 (INodeDirectory@442172) +- file1 (INodeFile@78392d4) +- file2 (INodeFile@78392d5) +- sub11 (INodeDirectory@8400cff) \- file3 (INodeFile@78392d6) \- z_file4 (INodeFile@45848712)

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.hdfs.server.namenode.visitor.NamespaceVisitor

NamespaceVisitor.Element, NamespaceVisitor.INodeVisitor

Method Summary

Modifier and Type	Method	Description
void	postVisitReferred(INode referred)	Right after visiting the given referred INode.
void	postVisitSub(NamespaceVisitor.Element sub, int index, boolean isLast)	Right after visiting the given sub NamespaceVisitor.Element.
void	preVisitReferred(INode referred)	Right before visiting the given referred INode.
void	preVisitSub(NamespaceVisitor.Element sub, int index, boolean isLast)	Right before visiting the given sub NamespaceVisitor.Element.
static String	print2Sting(FSNamesystem ns)
static String	print2Sting(INode root)
void	visitDirectory(INodeDirectory dir, int snapshot)	Visiting the given INodeDirectory (non-recursively).
void	visitFile(INodeFile file, int snapshot)	Visiting the given INodeFile.
void	visitReference(INodeReference ref, int snapshot)	Visiting the given INodeReference (non-recursively).
void	visitSnapshottable(INodeDirectory dir, DirectorySnapshottableFeature snapshottable)	Visiting a DirectorySnapshottableFeature.
void	visitSymlink(INodeSymlink symlink, int snapshot)	Visiting the given INodeSymlink.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.hdfs.server.namenode.visitor.NamespaceVisitor

getDefaultVisitor, visitDirectoryRecursively, visitReferenceRecursively, visitSubs

Method Details

print2Sting

public static String print2Sting(FSNamesystem ns)

Returns:

string of the tree in the given FSNamesystem.

print2Sting

public static String print2Sting(INode root)

Returns:

string of the tree from the given root.

visitFile

public void visitFile(INodeFile file,
 int snapshot)

Description copied from interface: NamespaceVisitor

Visiting the given INodeFile.

Specified by:

visitFile in interface NamespaceVisitor

visitSymlink

public void visitSymlink(INodeSymlink symlink,
 int snapshot)

Description copied from interface: NamespaceVisitor

Visiting the given INodeSymlink.

Specified by:

visitSymlink in interface NamespaceVisitor

visitReference

public void visitReference(INodeReference ref,
 int snapshot)

Description copied from interface: NamespaceVisitor

Visiting the given INodeReference (non-recursively).

Specified by:

visitReference in interface NamespaceVisitor

preVisitReferred

public void preVisitReferred(INode referred)

Description copied from interface: NamespaceVisitor

Right before visiting the given referred INode.

Specified by:

preVisitReferred in interface NamespaceVisitor

postVisitReferred

public void postVisitReferred(INode referred)

Description copied from interface: NamespaceVisitor

Right after visiting the given referred INode.

Specified by:

postVisitReferred in interface NamespaceVisitor

visitDirectory

public void visitDirectory(INodeDirectory dir,
 int snapshot)

Description copied from interface: NamespaceVisitor

Visiting the given INodeDirectory (non-recursively).

Specified by:

visitDirectory in interface NamespaceVisitor

visitSnapshottable

public void visitSnapshottable(INodeDirectory dir,
 DirectorySnapshottableFeature snapshottable)

Description copied from interface: NamespaceVisitor

Visiting a DirectorySnapshottableFeature.

Specified by:

visitSnapshottable in interface NamespaceVisitor

preVisitSub

public void preVisitSub(NamespaceVisitor.Element sub,
 int index,
 boolean isLast)

Description copied from interface: NamespaceVisitor

Right before visiting the given sub NamespaceVisitor.Element. The sub element may be a child of an INodeDirectory or a snapshot in DirectorySnapshottableFeature.

Specified by:

preVisitSub in interface NamespaceVisitor

Parameters:

sub - the element to be visited.

index - the index of the sub element.

isLast - is the sub element the last element?

postVisitSub

public void postVisitSub(NamespaceVisitor.Element sub,
 int index,
 boolean isLast)

Description copied from interface: NamespaceVisitor

Right after visiting the given sub NamespaceVisitor.Element. The sub element may be a child of an INodeDirectory or a snapshot in DirectorySnapshottableFeature.

Specified by:

postVisitSub in interface NamespaceVisitor

Parameters:

sub - the element just visited.

index - the index of the sub element.

isLast - is the sub element the last element?