ostore.update
Class ActionReplaceBlocks

java.lang.Object
  |
  +--ostore.update.Action
        |
        +--ostore.update.ActionReplaceBlocks

All Implemented Interfaces:

QuickSerializable

public class ActionReplaceBlocks

extends Action

This action replaces encryption-block sized blocks of data in a data object. It can only replace whole blocks of data at block boundaries. See ActionReplacePartialBlock (when it exists).

Version:

$Id: ActionReplaceBlocks.java,v 1.31 2002/08/31 21:53:06 srhea Exp $

Author:

Patrick R. Eaton

Field Summary

static boolean

DEBUG

Constructor Summary

ActionReplaceBlocks(InputBuffer buffer)

ActionReplaceBlocks(SecureHash target, int num_blocks, int block_offset, int block_size, byte[] data)
Construct an ActionReplaceBlocks action.

Method Summary

long	getLength() getLength returns the length of the ActionReplaceBlocks.
long	getOffset() getOffset returns the offset of the ActionReplaceBlocks.
Set	getTargets()
void	perform(GuidVersionMap guid_map, VersionHandleCache version_cache, UpdateContinuation continuation, DataCache cache)
void	serialize(OutputBuffer buffer) Add the object to the buffer.
String	toString() Return a representation of this action as a string.

Methods inherited from class java.lang.Object

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

Field Detail

DEBUG

public static final boolean DEBUG

See Also:

Constant Field Values

Constructor Detail

ActionReplaceBlocks

public ActionReplaceBlocks(SecureHash target,
                           int num_blocks,
                           int block_offset,
                           int block_size,
                           byte[] data)

Construct an ActionReplaceBlocks action.

Parameters:

target - the Aguid of the target data object

num_blocks - the number of blocks to be replaced

block_offset - the block offset at which to start the replacement

block_size - the size of the blocks to be replaced

data - the data to be replaced. The byte array must contain (num_blocks * block_size) bytes of data.

ActionReplaceBlocks

public ActionReplaceBlocks(InputBuffer buffer)
                    throws QSException

Method Detail

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 Action

Parameters:

buffer - the output buffer to add the object to

perform

public void perform(GuidVersionMap guid_map,
                    VersionHandleCache version_cache,
                    UpdateContinuation continuation,
                    DataCache cache)
             throws ostore.update.UpdateException

Overrides:

perform in class Action

ostore.update.UpdateException

getLength

public long getLength()

getLength returns the length of the ActionReplaceBlocks.

Specified by:

getLength in class Action

Returns:

length of ctionReplaceBlocks

getOffset

public long getOffset()

getOffset returns the offset of the ActionReplaceBlocks.

Returns:

offset of ctionReplaceBlocks

getTargets

public Set getTargets()

Overrides:

getTargets in class Action

toString

public String toString()

Description copied from class: Action

Return a representation of this action as a string.

Specified by:

toString in class Action

Returns:

a string representation of this action