Package io.permazen.kv.mvstore

Class MVStoreKVDatabase

java.lang.Object

io.permazen.kv.mvcc.SnapshotKVDatabase

io.permazen.kv.mvstore.MVStoreKVDatabase

All Implemented Interfaces:

KVDatabase

public class MVStoreKVDatabase
extends SnapshotKVDatabase

KVDatabase implementation based on a MVStoreAtomicKVStore, providing concurrent transactions and linearizable ACID semantics.

Note that this implementation does not use MVStore's built-in transaction managagement. Instead, MVStoreKVDatabase derives all of its transaction handling behavior from its SnapshotKVDatabase superclass.

Key watches are supported.

Field Summary

Fields inherited from class io.permazen.kv.mvcc.SnapshotKVDatabase

log

Constructor Summary

Constructors

Constructor	Description
MVStoreKVDatabase()

Method Summary

Modifier and Type	Method	Description
protected MVStoreKVTransaction	createSnapshotKVTransaction(MutableView view, long baseVersion)	Instantiate a new SnapshotKVTransaction instance.
MVStoreKVTransaction	createTransaction()	Create a new transaction.
MVStoreAtomicKVStore	getKVStore()	Get the underlying MVStoreAtomicKVStore used by this instance.
void	setKVStore(MVStoreAtomicKVStore kvstore)	Configure the underlying MVStoreAtomicKVStore used by this instance.

Methods inherited from class io.permazen.kv.mvcc.SnapshotKVDatabase

closeTransactions, createTransaction, getCurrentVersion, logException, setKVStore, start, stop, toString, wrapException

Methods inherited from class java.lang.Object

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

Constructor Details

MVStoreKVDatabase

public MVStoreKVDatabase()

Method Details

getKVStore

public MVStoreAtomicKVStore getKVStore()

Get the underlying MVStoreAtomicKVStore used by this instance.

Overrides:

getKVStore in class SnapshotKVDatabase

Returns:

underlying key/value store

setKVStore

public void setKVStore(MVStoreAtomicKVStore kvstore)

Configure the underlying MVStoreAtomicKVStore used by this instance. Required property.

Parameters:

kvstore - underlying key/value store

Throws:

IllegalStateException - if this instance is already SnapshotKVDatabase.start()ed

createTransaction

public MVStoreKVTransaction createTransaction()

Description copied from class: SnapshotKVDatabase

Create a new transaction.

Specified by:

createTransaction in interface KVDatabase

Overrides:

createTransaction in class SnapshotKVDatabase

Returns:

newly created transaction

createSnapshotKVTransaction

protected MVStoreKVTransaction createSnapshotKVTransaction(MutableView view,
 long baseVersion)

Description copied from class: SnapshotKVDatabase

Instantiate a new SnapshotKVTransaction instance.

The implementation in SnapshotKVDatabase just invokes the SnapshotKVTransaction constructor using this. Subclasses may want to override this method to create a more specific subclass.

Overrides:

createSnapshotKVTransaction in class SnapshotKVDatabase

Parameters:

view - mutable view to be used for this transaction

baseVersion - the database version associated with base

Returns:

new transaction instance