ostore.archive
Class GenerateFragsReqMsg

java.lang.Object
  |
  +--dd.api.DDRouteMsg
        |
        +--dd.api.DDMacRouteMsg
              |
              +--ostore.archive.GenerateFragsReqMsg

All Implemented Interfaces:

QueueElementIF, QuickSerializable

public class GenerateFragsReqMsg

extends DDMacRouteMsg

GenerateFragsReqMsg is an event class that generates Fragments for a version of an object or checkpoints the version.

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: GenerateFragsReqMsg.java,v 1.13 2004/05/13 20:13:06 hweather Exp $

Author:

Hakim Weatherspoon

See Also:

GenerateFragsChkptResp, GenerateFragsReqMsg, Fragment, Erasure

Field Summary

Fields inherited from class dd.api.DDRouteMsg

dd_intermediate_upcall, hopCount, inbound, one_hop, peer, recursive_route, TTL

Constructor Summary

GenerateFragsReqMsg()
Constructor: Initializes instance variables to null.

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

GenerateFragsReqMsg(SecureHash archiverGuid, GenerateFragsChkptReq req, SecureHash identifier, SecureHash aguid, Selection sel, Map blocks, boolean recursive, boolean dd_intermediate_upcall, boolean one_hop)
Constructor.

Method Summary

SecureHash	getAguid() getAguid returns the A-GUID of the object.
SortedMap	getBlocks() getBlocks returns the SortedMap that contains the slice of the object.
SecureHash	getIdentifier() getIdentifier returns the unique id of node (i.e. nodeGuid) or app (e.g.
GenerateFragsChkptReq	getReq() getReq returns the GenerateFragsChkptReq
Selection	getSelection() getSelection returns the portion of DataObject to create Fragments for.
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

GenerateFragsReqMsg

public GenerateFragsReqMsg()

Constructor: Initializes instance variables to null.

GenerateFragsReqMsg

public GenerateFragsReqMsg(SecureHash archiverGuid,
                           GenerateFragsChkptReq req,
                           SecureHash identifier,
                           SecureHash aguid,
                           Selection sel,
                           Map blocks,
                           boolean recursive,
                           boolean dd_intermediate_upcall,
                           boolean one_hop)

Constructor. Initializes the data in this GenerateFragsReqMsg.

Parameters:

req - GenerateFragsChkptReq

identifier - unique id of node (i.e. nodeGuid) or app (e.g. SHA1Hash(AppId + nodeGuid) requesting service from the ArchiverStage.

aguid - A-GUID of object.

sel - portion of DataObject to create Fragments for.

blocks - Map that contains slice of a object.

GenerateFragsReqMsg

public GenerateFragsReqMsg(InputBuffer buffer)
                    throws QSException

Constructs a GenerateFragsReqMsg from its serialized form.

Parameters:

buffer - serialized form of object.

Method Detail

getReq

public GenerateFragsChkptReq getReq()

getReq returns the GenerateFragsChkptReq

Returns:

GenerateFragsChkptReq

getIdentifier

public SecureHash getIdentifier()

getIdentifier returns the unique id of node (i.e. nodeGuid) or app (e.g. SHA1Hash(AppId + nodeGuid) requesting service from the ArchiverStage.

Returns:

the unique id of node (i.e. nodeGuid) or app (e.g. SHA1Hash(AppId + nodeGuid) requesting service from the ArchiverStage.

getAguid

public SecureHash getAguid()

getAguid returns the A-GUID of the object.

Returns:

A-GUID of object.

getSelection

public Selection getSelection()

getSelection returns the portion of DataObject to create Fragments for.

Returns:

portion of DataObject to create Fragments for.

getBlocks

public SortedMap getBlocks()

getBlocks returns the SortedMap that contains the slice of the object.

Returns:

Map that contains slice of a object.

serialize

public void serialize(OutputBuffer buffer)

Specified by ostore.util.QuickSerializable

Specified by:

serialize in interface QuickSerializable

Overrides:

serialize in class DDRouteMsg

Parameters:

buffer - the output buffer to add the object to

toString

public String toString()

Specified by java.lang.Object

Overrides:

toString in class Object