com.bigdata.journal

Class RootBlockCommitter

java.lang.Object

com.bigdata.journal.RootBlockCommitter

All Implemented Interfaces:

ICommitter

public class RootBlockCommitter
extends Object
implements ICommitter

Provides the callback to save the previous root block and store the address with the current CommitRecord. This enables access to historical root blocks since the next CommitRecord is accessible from the CommitRecordIndex. This is effective if slightly circuitous.

Author:

Martyn Cutcher

Constructor Summary

Constructors

Constructor and Description
RootBlockCommitter(AbstractJournal journal)

Method Summary

Methods

Modifier and Type	Method and Description
long	handleCommit(long commitTime) Write the current root block to the Journal and return its address to be stored in the CommitRecord.
void	invalidate(Throwable t) Mark an ICommitter as invalid.

Methods inherited from class java.lang.Object

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

Constructor Detail

RootBlockCommitter

public RootBlockCommitter(AbstractJournal journal)

Method Detail

handleCommit

public long handleCommit(long commitTime)

Write the current root block to the Journal and return its address to be stored in the CommitRecord.

Specified by:

handleCommit in interface ICommitter

Parameters:

commitTime - The timestamp assigned to the commit.

Returns:

The address of the record from which the persistence capable data structure may be reloaded. If no changes have been made then the previous address should be returned as it is still valid.

invalidate

public void invalidate(Throwable t)

Description copied from interface: ICommitter

Mark an ICommitter as invalid. This will prevent it from allowing any writes through to the backing store.

Specified by:

invalidate in interface ICommitter

Parameters:

t - A cause (required).

See Also:

https://jira.blazegraph.com/browse/BLZG-1953