ostore.archive.events
Class UpdateVerifiableBlocksResp

java.lang.Object
  |
  +--ostore.archive.events.UpdateVerifiableBlocksResp

All Implemented Interfaces:

QueueElementIF, QuickSerializable

public class UpdateVerifiableBlocksResp

extends Object

implements QueueElementIF, QuickSerializable

UpdateVerifiableBlocksResp is an event class that request that a version of an object or be updated with FHASH's or the top of the VHashTree for each modified block.

USAGE

The required field are thisRootBlock (CacheableIdentity of root block), numFragments (number of Fragments generated for block), inverseRate (inverse rate of encoding), erasureType (code for the type of erasure code to use).

NOTE: for copy-on-write only the blocks with null GUID's will be fragmented (archived).

Version:

$Id: UpdateVerifiableBlocksResp.java,v 1.13 2003/11/17 23:52:43 emilong Exp $

Author:

Hakim Weatherspoon

See Also:

GenerateFragsChkptResp, UpdateVerifiableBlocksResp, Fragment, Erasure

Field Summary

SecureHash

_vguid vguid is the resulting guid for fragmentation of checkpoint.

Constructor Summary

UpdateVerifiableBlocksResp()
Constructor: Initializes instance variables to null.

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

UpdateVerifiableBlocksResp(VID topBlockId, SecureHash vguid, SecureHash aguid)
Constructor.

Method Summary

SecureHash	getAguid() getAguid returns the A-GUID of the object.
VID	getTopBlockId() getTopBlockId returns the VID of root block.
SecureHash	getVguid() getVguid returns the V-GUID (i.e. version GUID)of the object.
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

Field Detail

_vguid

public SecureHash _vguid

vguid is the resulting guid for fragmentation of checkpoint.

Constructor Detail

UpdateVerifiableBlocksResp

public UpdateVerifiableBlocksResp()

Constructor: Initializes instance variables to null.

UpdateVerifiableBlocksResp

public UpdateVerifiableBlocksResp(VID topBlockId,
                                  SecureHash vguid,
                                  SecureHash aguid)

Constructor. Initializes the data in this UpdateVerifiableBlocksResp.

Parameters:

topBlockId - VID of the top block.

vguid - V-GUID of DataObject.

aguid - A-GUID of DataObject.

UpdateVerifiableBlocksResp

public UpdateVerifiableBlocksResp(InputBuffer buffer)
                           throws QSException

Constructs a UpdateVerifiableBlocksResp from its serialized form.

Parameters:

buffer - serialized form of object.

Method Detail

getTopBlockId

public VID getTopBlockId()

getTopBlockId returns the VID of root block.

Returns:

the VID of root block.

getVguid

public SecureHash getVguid()

getVguid returns the V-GUID (i.e. version GUID)of the object.

Returns:

V-GUID of object.

getAguid

public SecureHash getAguid()

getAguid returns the A-GUID of the object.

Returns:

A-GUID of object.

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

toString

public String toString()

Specified by java.lang.Object

Overrides:

toString in class Object