ostore.archive
Class RequestFragQueryState

java.lang.Object
  |
  +--ostore.archive.RequestFragQueryState

All Implemented Interfaces:

DDQueryState, QuickSerializable

public class RequestFragQueryState

extends Object

implements DDQueryState

RequestFragQueryState is a wrapper class for the state passed along with the RequestFragQuery DDQuery used in a RequestFragMsg DDLocateMsg used to find a Fragments that can be reconstructed into a block.

USAGE

To receive Fragments, dispatch a RequestFragMsg that contains a guid of the block to be recoalesced.

Version:

$Id: RequestFragQueryState.java,v 1.17 2004/05/13 20:13:06 hweather Exp $

Author:

Hakim Weatherspoon

See Also:

RequestorStage, RecoalesceBlkStage, RequestFragMsg, RequestFragResponseMsg, DDLocateMsg, DDQueryState, DDQuery

Constructor Summary

RequestFragQueryState(InputBuffer buffer)
Constructs a RequestFragQueryState from its serialized form.

RequestFragQueryState(int reqCardinality)
Creates a new RequestFragQueryState.

Method Summary

boolean	add(Object o) Adds the specified backpointer to this set if it is not already present.
boolean	contains(Object o) Tests whether the set already contains the specified backpointer.
int	getCardinality() getCardinality returns the number of back pointers pursued for a fragment or block.
int	getRequestedCardinality() getRequestedCardinality returns the requested number of back pointers pursued for a fragment.
void	serialize(OutputBuffer buffer) Specified by ostore.util.QuickSerializable
String	toString() Specified by java.lang.Object

Methods inherited from class java.lang.Object

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

Constructor Detail

RequestFragQueryState

public RequestFragQueryState(int reqCardinality)

Creates a new RequestFragQueryState.

RequestFragQueryState

public RequestFragQueryState(InputBuffer buffer)
                      throws QSException

Constructs a RequestFragQueryState from its serialized form.

Parameters:

buffer - serialized form of object.

Method Detail

serialize

public void serialize(OutputBuffer buffer)

Specified by ostore.util.QuickSerializable

Specified by:

serialize in interface QuickSerializable

Parameters:

buffer - the output buffer to add the object to

add

public boolean add(Object o)

Adds the specified backpointer to this set if it is not already present.

Parameters:

o - - backpointer to be added to this set.

Returns:

true if the set did not already contain the specified back ptr.

contains

public boolean contains(Object o)

Tests whether the set already contains the specified backpointer.

Parameters:

o - - backpointer to be tested against set.

Returns:

true if the set already contains the specified back ptr.

getCardinality

public int getCardinality()

getCardinality returns the number of back pointers pursued for a fragment or block.

Returns:

the number of back pointers pursued for a fragment or block.

getRequestedCardinality

public int getRequestedCardinality()

getRequestedCardinality returns the requested number of back pointers pursued for a fragment.

Returns:

the requested number of back pointers pursued for a fragment.

toString

public String toString()

Specified by java.lang.Object

Overrides:

toString in class Object