Package org.hibernate.engine.jdbc.connections.spi

Interface ConnectionProvider

All Superinterfaces:

Serializable, Service, Wrapped

All Known Implementing Classes:

AgroalConnectionProvider, C3P0ConnectionProvider, ConnectionProviderDelegate, DatasourceConnectionProviderImpl, DriverManagerConnectionProviderImpl, HikariCPConnectionProvider, JtaAwareConnectionProviderImpl, PreparedStatementSpyConnectionProvider, ProxoolConnectionProvider, SharedDriverManagerConnectionProviderImpl, SQLServerSnapshotIsolationConnectionProvider, TimeZoneConnectionProvider, UserSuppliedConnectionProviderImpl, ViburDBCPConnectionProvider

public interface ConnectionProvider
extends Service, Wrapped

A contract for obtaining JDBC connections and, optionally, for pooling connections.

Implementors must provide a public default constructor.

A ConnectionProvider may be selected using the configuration property "hibernate.connection.provider_class".

It's not usual for an applications to implement its on ConnectionProvider. Instead, the Hibernate project provides pre-built implementations for a variety of connection pools as add-on modules.

On the other hand, this is an extremely important extension point for integration with containers and frameworks.

See Also:

JdbcSettings.CONNECTION_PROVIDER

Method Summary

Modifier and Type	Method	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 later re-acquisition of those connections if needed?

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 later re-acquisition of those connections if needed?

This is used in conjunction with ConnectionReleaseMode.AFTER_STATEMENT 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.