com.sleepycat.je.cleaner.LocalUtilizationTracker Maven / Gradle / Ivy
/*-
* Copyright (C) 2002, 2018, Oracle and/or its affiliates. All rights reserved.
*
* This file was distributed by Oracle as part of a version of Oracle Berkeley
* DB Java Edition made available at:
*
* http://www.oracle.com/technetwork/database/database-technologies/berkeleydb/downloads/index.html
*
* Please see the LICENSE file included in the top-level directory of the
* appropriate version of Oracle Berkeley DB Java Edition for a copy of the
* license and additional information.
*/
package com.sleepycat.je.cleaner;
import com.sleepycat.je.dbi.EnvironmentImpl;
import com.sleepycat.je.log.LogEntryType;
/**
* Accumulates changes to the utilization profile locally in a single thread.
*
* The countNewLogEntry, countObsoleteNode and countObsoleteNodeInexact
* methods may be called without taking the log write latch. Totals and offset
* are accumulated locally in this object only, not in DatabaseImpl
* objects.
*
* When finished with this object, its information should be added to the
* Environment's UtilizationTracker and DatabaseImpl objects by calling
* transferToUtilizationTracker under the log write latch. This is done in the
* Checkpointer, Evictor and INCompressor by calling
* UtilizationProfile.flushLocalTracker which calls
* LogManager.transferToUtilizationTracker which calls
* BaseLocalUtilizationTracker.transferToUtilizationTracker.
*/
public class LocalUtilizationTracker extends BaseUtilizationTracker {
public LocalUtilizationTracker(EnvironmentImpl env) {
super(env);
}
/**
* Counts a node that has become obsolete and tracks the LSN offset, if
* non-zero, to avoid a lookup during cleaning.
*
* A zero LSN offset is used as a special value when obsolete offset
* tracking is not desired. [#15365] The file header entry (at offset
* zero) is never counted as obsolete, it is assumed to be obsolete by the
* cleaner.
*
* This method should only be called for LNs and INs (i.e, only for
* nodes). If type is null we assume it is an LN.
*/
public void countObsoleteNode(long lsn,
LogEntryType type,
int size) {
countObsolete
(lsn, type, size,
true, // trackOffset
true); // checkDupOffsets
}
/**
* Counts as countObsoleteNode does, but since the LSN may be inexact, does
* not track the obsolete LSN offset.
*
* This method should only be called for LNs and INs (i.e, only for
* nodes). If type is null we assume it is an LN.
*/
public void countObsoleteNodeInexact(long lsn,
LogEntryType type,
int size) {
countObsolete
(lsn, type, size,
false, // trackOffset
false); // checkDupOffsets
}
}