cascading.tap
Class Dfs

java.lang.Object
  cascading.tap.Tap
      cascading.tap.Hfs
          cascading.tap.Dfs

All Implemented Interfaces:

FlowElement, Serializable

public class Dfs
extends Hfs

Class Dfs is a Tap class that provides access to the Hadoop Distributed File System.

Use the URI constructors to specify a different HDFS cluster than the default.

See Also:

Serialized Form

Constructor Summary

Dfs(Fields sourceFields, String stringPath)
Constructor Dfs creates a new Dfs instance.

Dfs(Fields sourceFields, String stringPath, boolean replace)
Constructor Dfs creates a new Dfs instance.

Dfs(Fields sourceFields, URI uri)
Constructor Dfs creates a new Dfs instance.

Dfs(Fields sourceFields, URI uri, boolean replace)
Constructor Dfs creates a new Dfs instance.

Dfs(Scheme scheme, String stringPath)
Constructor Dfs creates a new Dfs instance.

Dfs(Scheme scheme, String stringPath, boolean replace)
Constructor Dfs creates a new Dfs instance.

Dfs(Scheme scheme, URI uri)
Constructor Dfs creates a new Dfs instance.

Dfs(Scheme scheme, URI uri, boolean replace)
Constructor Dfs creates a new Dfs instance.

Method Summary

protected FileSystem	getDefaultFileSystem(JobConf jobConf)
protected void	setStringPath(String stringPath)

Methods inherited from class cascading.tap.Hfs

deletePath, equals, getFileSystem, getPath, getPathModified, getQualifiedPath, getTemporaryDirectory, getTempPath, getURIScheme, hashCode, isUseTapCollector, makeDirs, makeTemporaryPathDir, makeURIScheme, openForRead, openForWrite, pathExists, setTemporaryDirectory, setUriScheme, sinkInit, sourceInit, toString

Methods inherited from class cascading.tap.Tap

flowInit, getScheme, getSinkFields, getSourceFields, isAppend, isKeep, isReplace, isSink, isSource, outgoingScopeFor, resolveFields, resolveIncomingOperationFields, setScheme, setUseTapCollector, sink, source, taps

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Dfs

public Dfs(Fields sourceFields,
           URI uri)

Constructor Dfs creates a new Dfs instance.

Parameters:

sourceFields - of type Fields

uri - of type URI

Dfs

public Dfs(Fields sourceFields,
           URI uri,
           boolean replace)

Constructor Dfs creates a new Dfs instance.

Parameters:

sourceFields - of type Fields

uri - of type URI

replace - of type boolean

Dfs

public Dfs(Fields sourceFields,
           String stringPath)

Constructor Dfs creates a new Dfs instance.

Parameters:

sourceFields - of type Fields

stringPath - of type String

Dfs

public Dfs(Fields sourceFields,
           String stringPath,
           boolean replace)

Constructor Dfs creates a new Dfs instance.

Parameters:

sourceFields - of type Fields

stringPath - of type String

replace - of type boolean

Dfs

public Dfs(Scheme scheme,
           URI uri)

Constructor Dfs creates a new Dfs instance.

Parameters:

scheme - of type Scheme

uri - of type URI

Dfs

public Dfs(Scheme scheme,
           URI uri,
           boolean replace)

Constructor Dfs creates a new Dfs instance.

Parameters:

scheme - of type Scheme

uri - of type URI

replace - of type boolean

Dfs

public Dfs(Scheme scheme,
           String stringPath)

Constructor Dfs creates a new Dfs instance.

Parameters:

scheme - of type Scheme

stringPath - of type String

Dfs

public Dfs(Scheme scheme,
           String stringPath,
           boolean replace)

Constructor Dfs creates a new Dfs instance.

Parameters:

scheme - of type Scheme

stringPath - of type String

replace - of type boolean

Method Detail

setStringPath

protected void setStringPath(String stringPath)

Overrides:

setStringPath in class Hfs

getDefaultFileSystem

protected FileSystem getDefaultFileSystem(JobConf jobConf)
                                   throws IOException

Overrides:

getDefaultFileSystem in class Hfs

Throws:

IOException