Package io.permazen.kv.mvstore

Class MVMapSnapshot

java.lang.Object

io.permazen.kv.AbstractKVStore

io.permazen.kv.mvstore.MVMapKVStore

io.permazen.kv.mvstore.MVMapSnapshot

All Implemented Interfaces:

CloseableKVStore, KVStore, Closeable, AutoCloseable

@ThreadSafe
public class MVMapSnapshot
extends MVMapKVStore
implements CloseableKVStore

A read-only snapshot an MVMap.

Instances must be close()'d when no longer needed to allow the underlying MVMap version to be released.

Mutation operations throw UnsupportedOperationException.

Field Summary

Fields inherited from class io.permazen.kv.mvstore.MVMapKVStore

log

Constructor Summary

Constructors

Constructor	Description
MVMapSnapshot(org.h2.mvstore.MVMap<ByteData,ByteData> mvmap)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	close()	Close this KVStore and release any resources associated with it.

Methods inherited from class io.permazen.kv.mvstore.MVMapKVStore

get, getAtLeast, getAtMost, getMVMap, getRange, put, remove, toString

Methods inherited from class io.permazen.kv.AbstractKVStore

adjustCounter, decodeCounter, encodeCounter, removeRange

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.permazen.kv.KVStore

adjustCounter, apply, decodeCounter, encodeCounter, get, getAtLeast, getAtMost, getRange, getRange, getRange, put, remove, removeRange, removeRange

Constructor Details

MVMapSnapshot

public MVMapSnapshot(org.h2.mvstore.MVMap<ByteData,ByteData> mvmap)

Constructor.

Parameters:

mvmap - the underlying MVMap to snapshot

Throws:

NullPointerException - if mvmap is null

Method Details

close

public void close()

Description copied from interface: CloseableKVStore

Close this KVStore and release any resources associated with it.

If this instance is already closed, then nothing happens.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in interface CloseableKVStore