com.sleepycat.je.rep.vlsn

Class LogItemCache

java.lang.Object

com.sleepycat.je.rep.vlsn.LogItemCache

class LogItemCache
extends java.lang.Object

A no-wait cache used to retain the most recent VLSNs. The Feeders check this cache first for log entries to send out to the Replicas. Feeders that are feeding at the most up to date portion of the replication stream will likely hit in the cache, preventing a lookup in the log buffers or log files. The log item cache is made up of weak references so there is never any guarantee that even the most recent 32 entries are in there.

Constructor Summary

Constructors

Constructor and Description
LogItemCache(int cacheSize, StatGroup statGroup) Creates a log item size of the specified size.

Method Summary

Modifier and Type	Method and Description
(package private) void	clear() For explicit release of references.
(package private) LogItem	get(VLSN vlsn)
(package private) void	put(VLSN vlsn, LogItem logItem)

Methods inherited from class java.lang.Object

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

Constructor Detail

LogItemCache

LogItemCache(int cacheSize,
             StatGroup statGroup)

Creates a log item size of the specified size.

Parameters:

cacheSize - it must be a power of two

statGroup - the statsGroup to which this cache adds its stats

Throws:

java.lang.IllegalArgumentException - via ReplicatedEnvironment ctor.

Method Detail

put

void put(VLSN vlsn,
         LogItem logItem)

get

LogItem get(VLSN vlsn)

clear

void clear()

For explicit release of references.