org.openrdf.http.server.repository.transaction

Enum ActiveTransactionRegistry

java.lang.Object

java.lang.Enum<ActiveTransactionRegistry>

org.openrdf.http.server.repository.transaction.ActiveTransactionRegistry

All Implemented Interfaces:

Serializable, Comparable<ActiveTransactionRegistry>

public enum ActiveTransactionRegistry
extends Enum<ActiveTransactionRegistry>

Registry keeping track of active transactions identified by a UUID and the RepositoryConnection that corresponds to the given transaction.

Since:

2.8.0

Author:

Jeen Broekstra

Enum Constant Summary

Enum Constants

Enum Constant and Description
INSTANCE

Method Summary

Modifier and Type	Method and Description
void	deregister(UUID transactionId) Remove the given transaction from the registry
RepositoryConnection	getTransactionConnection(UUID transactionId) Obtain the RepositoryConnection associated with the given transaction.
void	register(UUID transactionId, RepositoryConnection conn) Register a new transaction with the given id and connection.
void	returnTransactionConnection(UUID transactionId) Unlocks the RepositoryConnection associated with the given transaction for use by other threads.
static ActiveTransactionRegistry	valueOf(String name) Returns the enum constant of this type with the specified name.
static ActiveTransactionRegistry[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

INSTANCE

public static final ActiveTransactionRegistry INSTANCE

Method Detail

values

public static ActiveTransactionRegistry[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (ActiveTransactionRegistry c : ActiveTransactionRegistry.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static ActiveTransactionRegistry valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

register

public void register(UUID transactionId,
                     RepositoryConnection conn)
              throws RepositoryException

Register a new transaction with the given id and connection.

Parameters:

transactionId - the transaction id

conn - the RepositoryConnection to use for handling the transaction.

Throws:

RepositoryException - if a transaction is already registered with the given transaction id.

deregister

public void deregister(UUID transactionId)
                throws RepositoryException

Remove the given transaction from the registry

Parameters:

transactionId - the transaction id

Throws:

RepositoryException - if no registered transaction with the given id could be found.

getTransactionConnection

public RepositoryConnection getTransactionConnection(UUID transactionId)
                                              throws RepositoryException,
                                                     InterruptedException

Obtain the RepositoryConnection associated with the given transaction. This method will block if another thread currently has access to the connection.

Parameters:

transactionId - a transaction ID

Returns:

the RepositoryConnection belonging to this transaction.

Throws:

RepositoryException - if no transaction with the given id is registered.

InterruptedException - if the thread is interrupted while acquiring a lock on the transaction.

returnTransactionConnection

public void returnTransactionConnection(UUID transactionId)

Unlocks the RepositoryConnection associated with the given transaction for use by other threads. If the transaction is no longer registered, this will method will exit silently.

Parameters:

transactionId - a transaction identifier.