Package io.permazen.kv.lmdb

Class ByteArrayLMDBKVStore

java.lang.Object

io.permazen.kv.AbstractKVStore

io.permazen.kv.lmdb.LMDBKVStore<byte[]>

io.permazen.kv.lmdb.ByteArrayLMDBKVStore

All Implemented Interfaces:

CloseableKVStore, KVStore, Closeable, AutoCloseable

public class ByteArrayLMDBKVStore
extends LMDBKVStore<byte[]>

KVStore view of a LMDB transaction using byte[] array buffers.

Instances must be LMDBKVStore.close()'d when no longer needed to avoid leaking resources.

Field Summary

Fields inherited from class io.permazen.kv.lmdb.LMDBKVStore

log

Constructor Summary

Constructors

Constructor	Description
ByteArrayLMDBKVStore(org.lmdbjava.Dbi<byte[]> db, org.lmdbjava.Txn<byte[]> tx)	Constructor.

Method Summary

Modifier and Type	Method	Description
protected byte[]	unwrap(byte[] data, boolean copy)	Unwrap the given buffer, returning its contents as a byte array.
protected byte[]	wrap(byte[] data, boolean copy)	Wrap the given byte array in a buffer appropriate for this instance.

Methods inherited from class io.permazen.kv.lmdb.LMDBKVStore

close, finalize, get, getDatabase, getKeyRange, getRange, getTransaction, isClosed, put, remove, removeRange, toString

Methods inherited from class io.permazen.kv.AbstractKVStore

adjustCounter, decodeCounter, encodeCounter, getAtLeast, getAtMost

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.permazen.kv.KVStore

adjustCounter, apply, decodeCounter, encodeCounter, getAtLeast, getAtMost, getRange, getRange, removeRange

Constructor Details

ByteArrayLMDBKVStore

public ByteArrayLMDBKVStore(org.lmdbjava.Dbi<byte[]> db,
 org.lmdbjava.Txn<byte[]> tx)

Constructor.

Closing this instance does not close the underlying transaction.

Parameters:

db - LMDB database

tx - LMDB transaction

Throws:

IllegalArgumentException - if db or tx is null

Method Details

wrap

protected byte[] wrap(byte[] data,
 boolean copy)

Description copied from class: LMDBKVStore

Wrap the given byte array in a buffer appropriate for this instance.

Specified by:

wrap in class LMDBKVStore<byte[]>

Parameters:

data - byte array data, or possibly null

copy - if true, then changes to the data in either buf or the returned buffer must not affect the other

Returns:

null if buf is null, otherwise a buffer containing the data in buf

unwrap

protected byte[] unwrap(byte[] data,
 boolean copy)

Description copied from class: LMDBKVStore

Unwrap the given buffer, returning its contents as a byte array.

Specified by:

unwrap in class LMDBKVStore<byte[]>

Parameters:

data - a buffer containing byte[] array data, or possibly null

copy - if true, then changes to the data in either buf or the returned array must not affect the other

Returns:

byte array data in buf, or null if buf is null