org.apache.jena.dboe.trans.bplustree

Class BPT

java.lang.Object

org.apache.jena.dboe.trans.bplustree.BPT

public final class BPT
extends Object

B+Tree assist functions

Field Summary

Fields

Modifier and Type	Field and Description
static boolean	CheckingConcurrency
static boolean	CheckingNode
static boolean	DumpTree Dump before and after top level update operations
static boolean	forcePromoteModes Enable forces promotion of blocks; otherwise blocks are promoted as needed.
static boolean	Logging
static boolean	promoteDuplicateNodes Whether to duplicate a nodes block on a promotion call if forcePromoteModes=true
static boolean	promoteDuplicateRecords Whether to duplicate a records block on a promotion call if forcePromoteModes=true

Constructor Summary

Constructors

Constructor and Description
BPT()

Method Summary

Modifier and Type	Method and Description
static void	checking(boolean onOrOff) Enable detailed internal consistency checking
static BPlusTree	createRootOnlyBPTree(BPlusTreeParams bptParams, org.apache.jena.dboe.base.file.BufferChannel bptState, org.apache.jena.dboe.base.block.BlockMgr blkMgrNodes, org.apache.jena.dboe.base.block.BlockMgr blkMgrRecords) The initial tree is a single root node with no records block below it.
static void	infoAll(boolean onOrOff) Output a lot of detailed information.

Methods inherited from class java.lang.Object

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

Field Detail

Logging

public static boolean Logging

forcePromoteModes

public static boolean forcePromoteModes

Enable forces promotion of blocks; otherwise blocks are promoted as needed.

promoteDuplicateRecords

public static boolean promoteDuplicateRecords

Whether to duplicate a records block on a promotion call if forcePromoteModes=true

promoteDuplicateNodes

public static boolean promoteDuplicateNodes

Whether to duplicate a nodes block on a promotion call if forcePromoteModes=true

CheckingNode

public static boolean CheckingNode

CheckingConcurrency

public static boolean CheckingConcurrency

DumpTree

public static boolean DumpTree

Dump before and after top level update operations

Constructor Detail

BPT

public BPT()

Method Detail

checking

public static void checking(boolean onOrOff)

Enable detailed internal consistency checking

infoAll

public static void infoAll(boolean onOrOff)

Output a lot of detailed information.

createRootOnlyBPTree

public static BPlusTree createRootOnlyBPTree(BPlusTreeParams bptParams,
                                             org.apache.jena.dboe.base.file.BufferChannel bptState,
                                             org.apache.jena.dboe.base.block.BlockMgr blkMgrNodes,
                                             org.apache.jena.dboe.base.block.BlockMgr blkMgrRecords)

The initial tree is a single root node with no records block below it. It is an illegal tree. We make it by creating a real tree, deleting and freeing the records block from the root, then resetting the records block manager. This is to avoid having specialized creating code in BPlusTreeFactory solely for the rewriter.