com.bigdata.btree
Interface IDirtyListener

public interface IDirtyListener

An interface that may be used to learn when a BTree becomes dirty.

Version:

$Id: IDirtyListener.java 4926 2011-07-15 19:34:25Z thompsonbry $

Author:

Bryan Thompson

Method Summary

void	dirtyEvent(ICheckpointProtocol btree) The btree has become dirty.

Method Detail

dirtyEvent

void dirtyEvent(ICheckpointProtocol btree)

The btree has become dirty.

Note: This event is always generated for a new btree. Once a btree is created it remains dirty until the root (and any dirty children) have been flushed to the backing store. A btree that is read from the backing store is always clean and consists of "immutable" nodes and/or leaves. A btree remains clean until there is a write on some node or leaf. That write triggers copy-on-write, which percolates from the point of the write up to the root node and results in the reference to the root node being replaced. When that happens a dirty event is generated.

Parameters:

btree - The btree.