org.apache.tez.runtime.library.common.shuffle

Class FetchedInput

java.lang.Object

org.apache.tez.runtime.library.common.shuffle.FetchedInput

Direct Known Subclasses:

DiskFetchedInput, LocalDiskFetchedInput, MemoryFetchedInput

@InterfaceAudience.Private
public abstract class FetchedInput
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	FetchedInput.State
static class	FetchedInput.Type

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	FetchedInput(InputAttemptIdentifier inputAttemptIdentifier, FetchedInputCallback callbackHandler)

Method Summary

Modifier and Type	Method and Description
abstract void	abort() Abort the output.
abstract void	commit() Commit the output.
boolean	equals(Object obj)
abstract void	free() Called when this input has been consumed, so that resources can be reclaimed.
protected int	getId()
InputAttemptIdentifier	getInputAttemptIdentifier()
abstract InputStream	getInputStream() Return an input stream to be used to read the previously fetched data.
abstract OutputStream	getOutputStream() Returns the output stream to be used to write fetched data.
abstract long	getSize()
protected FetchedInput.State	getState()
abstract FetchedInput.Type	getType()
int	hashCode()
protected boolean	isState(FetchedInput.State state)
void	notifyFetchComplete() Inform the Allocator about a committed resource.
void	notifyFetchFailure() Inform the Allocator about a failed resource.
void	notifyFreedResource() Inform the Allocator about a completed resource being released.
protected void	setState(FetchedInput.State state)

Methods inherited from class java.lang.Object

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

Constructor Detail

FetchedInput

protected FetchedInput(InputAttemptIdentifier inputAttemptIdentifier,
                       FetchedInputCallback callbackHandler)

Method Detail

getType

public abstract FetchedInput.Type getType()

isState

protected boolean isState(FetchedInput.State state)

setState

protected void setState(FetchedInput.State state)

getState

protected FetchedInput.State getState()

getId

protected int getId()

getSize

public abstract long getSize()

getInputAttemptIdentifier

public InputAttemptIdentifier getInputAttemptIdentifier()

notifyFetchComplete

public void notifyFetchComplete()

Inform the Allocator about a committed resource. This should be called by commit

notifyFetchFailure

public void notifyFetchFailure()

Inform the Allocator about a failed resource. This should be called by abort

notifyFreedResource

public void notifyFreedResource()

Inform the Allocator about a completed resource being released. This should be called by free

getOutputStream

public abstract OutputStream getOutputStream()
                                      throws IOException

Returns the output stream to be used to write fetched data. Users are expected to close the OutputStream when they're done

Throws:

IOException

getInputStream

public abstract InputStream getInputStream()
                                    throws IOException

Return an input stream to be used to read the previously fetched data. All calls to getInputStream() produce new reset streams for reading. Users are expected to close the InputStream when they're done.

Throws:

IOException

commit

public abstract void commit()
                     throws IOException

Commit the output. Should be idempotent

Throws:

IOException

abort

public abstract void abort()
                    throws IOException

Abort the output. Should be idempotent

Throws:

IOException

free

public abstract void free()

Called when this input has been consumed, so that resources can be reclaimed.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object