ostore.archive.dissemination
Class TypeResponseMsg

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

All Implemented Interfaces:

QueueElementIF, QuickSerializable

public class TypeResponseMsg

extends DDMacRouteMsg

TypeResponseMsg is a MAC'd (Message Authentication Certificate) response msg specifying a nodes is willingness to store Disseminatables.

USAGE

To create dissemination sets the SetCreator probes the system collecting information about a sufficiently large set of StorageServers. The SetCreator relies on the properties of dd to discover new servers. dd routes TypeRequestMsgs to the node that most closely matches the requested destination. Thus, even though the dd address space is sparse, the SetCreator can use a scan of the address space to reach a random set of StorageServers. StorageServers that are willing to store Disseminatables respond with a signed (i.e. MAC'd Message Authentication Certificate) statement of their type contained in a TypeResponseMsg.

Version:

$Id: TypeResponseMsg.java,v 1.14 2004/05/13 20:13:06 hweather Exp $

Author:

Hakim Weatherspoon

See Also:

DisseminatorStage, SetCreatorStage, ArchivalStorageStage, TypeRequestMsg, TypeResponseMsg, Disseminatable, TypeRequestMsg, DDMacRouteMsg

Field Summary

QuickSerializable

type type is the type of machine (e.g. domain, location, administration, etc) as a response to the original type request.

Fields inherited from class dd.api.DDRouteMsg

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

Constructor Summary

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

TypeResponseMsg(SecureHash requestorGuid, QuickSerializable typeAck, boolean recursive_route, boolean dd_intermediate_upcall, boolean one_hop)
Construct according to the given fields.

Method Summary

QuickSerializable	getType() getType returns the type to the RequestFragMsg.
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

type

public QuickSerializable type

type is the type of machine (e.g. domain, location, administration, etc) as a response to the original type request.

Constructor Detail

TypeResponseMsg

public TypeResponseMsg(SecureHash requestorGuid,
                       QuickSerializable typeAck,
                       boolean recursive_route,
                       boolean dd_intermediate_upcall,
                       boolean one_hop)

Construct according to the given fields.

TypeResponseMsg

public TypeResponseMsg(InputBuffer buffer)
                throws QSException

Constructs a TypeResponseMsg from its serialized form.

Parameters:

buffer - serialized form of object.

Method Detail

getType

public final QuickSerializable getType()

getType returns the type to the RequestFragMsg.

Returns:

the type to the RequestFragMsg.

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