com.sleepycat.je.txn

Class LockerFactory

java.lang.Object

com.sleepycat.je.txn.LockerFactory

public class LockerFactory
extends Object

Factory of static methods for creating Locker objects.

Constructor Summary

Constructors

Constructor and Description
LockerFactory()

Method Summary

Modifier and Type	Method and Description
static Locker	getInternalReadOperationLocker(EnvironmentImpl envImpl) Get a non-transactional locker for internal database operations.
static Locker	getReadableLocker(Database dbHandle, Locker locker, boolean readCommittedIsolation) Get a locker for this database handle for a read or cursor operation.
static Locker	getReadableLocker(Database dbHandle, Transaction userTxn, boolean readCommittedIsolation) Get a locker for a read or cursor operation.
static Locker	getWritableLocker(Environment env, Transaction userTxn, boolean isInternalDb, boolean dbIsTransactional, boolean autoTxnIsReplicated) Get a locker for a write operation, checking whether the db and environment is transactional or not.
static Locker	getWritableLocker(Environment env, Transaction userTxn, boolean isInternalDb, boolean dbIsTransactional, boolean autoTxnIsReplicated, TransactionConfig autoCommitConfig) Get a locker for a write operation.

Methods inherited from class java.lang.Object

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

Constructor Detail

LockerFactory

public LockerFactory()

Method Detail

getWritableLocker

public static Locker getWritableLocker(Environment env,
                                       Transaction userTxn,
                                       boolean isInternalDb,
                                       boolean dbIsTransactional,
                                       boolean autoTxnIsReplicated)

Get a locker for a write operation, checking whether the db and environment is transactional or not. Must return a non null locker.

getWritableLocker

public static Locker getWritableLocker(Environment env,
                                       Transaction userTxn,
                                       boolean isInternalDb,
                                       boolean dbIsTransactional,
                                       boolean autoTxnIsReplicated,
                                       TransactionConfig autoCommitConfig)

Get a locker for a write operation.

Parameters:

autoTxnIsReplicated - is true if this transaction is executed on a rep group master, and needs to be broadcast. Currently, all application-created transactions are of the type com.sleepycat.je.txn.Txn, and are replicated if the parent environment is replicated. Auto Txns are trickier because they may be created for a local write operation, such as log cleaning.

getReadableLocker

public static Locker getReadableLocker(Database dbHandle,
                                       Transaction userTxn,
                                       boolean readCommittedIsolation)

Get a locker for a read or cursor operation.

getReadableLocker

public static Locker getReadableLocker(Database dbHandle,
                                       Locker locker,
                                       boolean readCommittedIsolation)

Get a locker for this database handle for a read or cursor operation.

getInternalReadOperationLocker

public static Locker getInternalReadOperationLocker(EnvironmentImpl envImpl)

Get a non-transactional locker for internal database operations. Always non replicated. This method is not called for user txns and should not throw a Java runtime exception (IllegalArgument, etc).