ostore.dtree
Class JoinTreeReq

java.lang.Object
  |
  +--ostore.dtree.DTreeReq
        |
        +--ostore.dtree.JoinTreeReq

All Implemented Interfaces:

QueueElementIF, QuickSerializable

public class JoinTreeReq

extends DTreeReq

Messages instructing the local DTreeNode to tie into a dissemination tree.

Version:

$Id: JoinTreeReq.java,v 1.15 2002/07/29 18:48:53 geels Exp $

Author:

Dennis Geels

Field Summary

protected boolean	internal true iff this request was generated by the DTreeNode, rather than by the ReplicaStage.
protected boolean	publish true iff the local server wishes to publish itself as an available secondary replica in the tree.

Fields inherited from class ostore.dtree.DTreeReq

digest, tree_id

Constructor Summary

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

JoinTreeReq(SecureHash tree_id, boolean publish)
Creates a new request for the specified tree.

Method Summary

boolean	get_publish_flag() Returns true iff the local server wishes to publish itself as an available secondary replica in the tree.
boolean	is_internal() Returns true iff this request was generated by the DTreeNode, rather than by the ReplicaStage.
void	serialize(OutputBuffer buffer) Add the object to the buffer.
String	toString() Returns a human-readable representation of this JoinTreeReq.

Methods inherited from class ostore.dtree.DTreeReq

get_digest, get_seq_num, get_tree_id, hashCode

Methods inherited from class java.lang.Object

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

Field Detail

publish

protected boolean publish

true iff the local server wishes to publish itself as an available secondary replica in the tree. This flag should be false for client machines which only want to be leaves on the tree.

internal

protected boolean internal

true iff this request was generated by the DTreeNode, rather than by the ReplicaStage.

Constructor Detail

JoinTreeReq

public JoinTreeReq(SecureHash tree_id,
                   boolean publish)

Creates a new request for the specified tree.

Parameters:

tree_id - the A-GUID for the tree's data object.

publish - true iff this server should advertise as a secondary replica in Tapestry.

JoinTreeReq

public JoinTreeReq(InputBuffer buffer)
            throws QSException

Constructs a JoinTreeReq from its serialized form.

Method Detail

get_publish_flag

public boolean get_publish_flag()

Returns true iff the local server wishes to publish itself as an available secondary replica in the tree.

is_internal

public boolean is_internal()

Returns true iff this request was generated by the DTreeNode, rather than by the ReplicaStage.

serialize

public void serialize(OutputBuffer buffer)

Description copied from interface: QuickSerializable

Add the object to the buffer.

Specified by:

serialize in interface QuickSerializable

Overrides:

serialize in class DTreeReq

Parameters:

buffer - the output buffer to add the object to

toString

public String toString()

Returns a human-readable representation of this JoinTreeReq.

Overrides:

toString in class DTreeReq