Package org.opends.server.replication.plugin

Class AttrHistorical

java.lang.Object

org.opends.server.replication.plugin.AttrHistorical

Direct Known Subclasses:

AttrHistoricalMultiple, AttrHistoricalSingle

public abstract class AttrHistorical
extends Object

This class store historical information for a provided attribute.

Constructor Summary

Constructors

Constructor	Description
AttrHistorical()

Method Summary

Modifier and Type	Method	Description
abstract void	assign(org.opends.server.replication.plugin.HistoricalAttributeValue histVal)	Assign the provided historical value to this object.
abstract boolean	containsAddedValue(ByteString value)	Returns true if this historical information contains add or replace meta-data for the provided attribute value.
abstract CSN	getDeleteTime()	Returns the last time when this attribute was deleted.
abstract Set<AttrValueHistorical>	getValuesHistorical()	Get the historical informations for this attribute Info.
abstract void	processLocalOrNonConflictModification(CSN csn, Modification mod)	This method calculates the historical information and update the hist attribute to store the historical information for modify operation that does not conflict with previous operation.
abstract Modification	replayOperation(CSN csn, Entry modifiedEntry, Modification mod)	This method will be called when replaying an operation.

Methods inherited from class java.lang.Object

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

Constructor Detail

AttrHistorical

public AttrHistorical()

Method Detail

replayOperation

public abstract Modification replayOperation(CSN csn,
                                             Entry modifiedEntry,
                                             Modification mod)

This method will be called when replaying an operation. It should use whatever historical information is stored in this class to solve the conflict and return the modification that will actually have to be replayed.

Parameters:

csn - The CSN associated to the operation.

modifiedEntry - The entry modified by this operation.

mod - The modification.

Returns:

The modification which should be replayed, or null if the modification should not be replayed.

processLocalOrNonConflictModification

public abstract void processLocalOrNonConflictModification(CSN csn,
                                                           Modification mod)

This method calculates the historical information and update the hist attribute to store the historical information for modify operation that does not conflict with previous operation. This is the usual path and should therefore be optimized.

It does not check if the operation to process is conflicting or not with previous operations. The caller is responsible for this.

Parameters:

csn - The CSN of the operation to process

mod - The modify operation to process.

getValuesHistorical

public abstract Set<AttrValueHistorical> getValuesHistorical()

Get the historical informations for this attribute Info.

Returns:

the historical informations

containsAddedValue

public abstract boolean containsAddedValue(ByteString value)

Returns true if this historical information contains add or replace meta-data for the provided attribute value.

Parameters:

value - The attribute value.

Returns:

true if this historical information contains add or replace meta-data for the provided attribute value.

getDeleteTime

public abstract CSN getDeleteTime()

Returns the last time when this attribute was deleted.

Returns:

the last time when this attribute was deleted

assign

public abstract void assign(org.opends.server.replication.plugin.HistoricalAttributeValue histVal)

Assign the provided historical value to this object.

Parameters:

histVal - the historical value