ostore.read
Class SliceReadResp

java.lang.Object
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  +--ostore.read.ReadResp
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        +--ostore.read.SliceReadResp

All Implemented Interfaces:

QueueElementIF, QuickSerializable

public class SliceReadResp

extends ReadResp

Events sent from the ReadStage to the ReplicaStage responding to SliceReadReq events.

Version:

$Id: SliceReadResp.java,v 1.19 2002/07/29 18:48:54 geels Exp $

Author:

Dennis Geels

Field Summary

protected SortedMap

blocks A VID->VerifiableBlock map containing the blocks that make up the slice read, or null.

Fields inherited from class ostore.read.ReadResp

digest, error_code, missing, NO_ERROR, read, READ_ERROR, req_digest

Constructor Summary

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

SliceReadResp(ReadReq req, int error_code)
Constructs a new (failed) SliceReadResp.

SliceReadResp(ReadReq req, Selection read, Selection missing, Map blocks)
Constructs a new (successful) SliceReadResp.

Method Summary

Map	get_blocks() Returns the VID->block map containing the blocks that make up the slice read.
void	serialize(OutputBuffer buffer) Add the object to the buffer.

Methods inherited from class ostore.read.ReadResp

get_digest, get_error_code, get_missing, get_read, get_req_digest, get_req_seq_num, hashCode, successful, toString

Methods inherited from class java.lang.Object

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

Field Detail

blocks

protected SortedMap blocks

A VID->VerifiableBlock map containing the blocks that make up the slice read, or null.

blocks != null iff this.successful().

The hashCode of responses depend on their digest. Therefore we keep this map sorted, to ensure a deterministic serialization.

Constructor Detail

SliceReadResp

public SliceReadResp(ReadReq req,
                     Selection read,
                     Selection missing,
                     Map blocks)

Constructs a new (successful) SliceReadResp.

If blocks is not already a SortedMap, it is copied into one.

SliceReadResp

public SliceReadResp(ReadReq req,
                     int error_code)

Constructs a new (failed) SliceReadResp.

SliceReadResp

public SliceReadResp(InputBuffer buffer)
              throws QSException

Constructs a SliceReadResp from its serialized form.

Method Detail

get_blocks

public Map get_blocks()

Returns the VID->block map containing the blocks that make up the slice read.

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 ReadResp

Parameters:

buffer - the output buffer to add the object to