org.hibernate.engine.jdbc.connections.spi

Interface ConnectionProvider

All Superinterfaces:

Serializable, Service, Wrapped

All Known Implementing Classes:

C3P0ConnectionProvider, DatasourceConnectionProviderImpl, DriverManagerConnectionProviderImpl, HikariCPConnectionProvider, JtaAwareConnectionProviderImpl, ProxoolConnectionProvider, UserSuppliedConnectionProviderImpl

public interface ConnectionProvider
extends Service, Wrapped

A contract for obtaining JDBC connections.

Implementors might also implement connection pooling.

Implementors should provide a public default constructor.

Method Summary

Modifier and Type	Method and Description
void	closeConnection(Connection conn) Release a connection from Hibernate use.
Connection	getConnection() Obtains a connection for Hibernate use according to the underlying strategy of this provider.
boolean	supportsAggressiveRelease() Does this connection provider support aggressive release of JDBC connections and re-acquisition of those connections (if need be) later? This is used in conjunction with AvailableSettings.RELEASE_CONNECTIONS to aggressively release JDBC connections.

Methods inherited from interface org.hibernate.service.spi.Wrapped

isUnwrappableAs, unwrap

Method Detail

getConnection

Connection getConnection()
                  throws SQLException

Obtains a connection for Hibernate use according to the underlying strategy of this provider.

Returns:

The obtained JDBC connection

Throws:

SQLException - Indicates a problem opening a connection

HibernateException - Indicates a problem otherwise obtaining a connection.

closeConnection

void closeConnection(Connection conn)
              throws SQLException

Release a connection from Hibernate use.

Parameters:

conn - The JDBC connection to release

Throws:

SQLException - Indicates a problem closing the connection

HibernateException - Indicates a problem otherwise releasing a connection.

supportsAggressiveRelease

boolean supportsAggressiveRelease()

Does this connection provider support aggressive release of JDBC connections and re-acquisition of those connections (if need be) later?

This is used in conjunction with AvailableSettings.RELEASE_CONNECTIONS to aggressively release JDBC connections. However, the configured ConnectionProvider must support re-acquisition of the same underlying connection for that semantic to work.

Typically, this is only true in managed environments where a container tracks connections by transaction or thread. Note that JTA semantic depends on the fact that the underlying connection provider does support aggressive release.

Returns:

true if aggressive releasing is supported; false otherwise.