edu.northwestern.at.utils.db.hibernate
Class SimpleHibernateConnectionProvider

java.lang.Object
  edu.northwestern.at.utils.db.hibernate.SimpleHibernateConnectionProvider

All Implemented Interfaces:

org.hibernate.connection.ConnectionProvider

public class SimpleHibernateConnectionProvider
extends java.lang.Object
implements org.hibernate.connection.ConnectionProvider

A simple Hibernate connection provider.

This class wraps a SimpleConnectionPool.

Hibernate configuration properties are used to configure the SimpleConnectionPool properties as follows:

• hibernate.connection.driver_class -> driverClassName
• hibernate.connection.url -> url
• hibernate.connection.username -> username
• hibernate.connection.password -> password
• hibernate.connection.pool_size -> maxPoolSize
• hibernate.connection.autocommit -> autocommit

The remaining SimpleConnectionPool properties use their default values:

• idleTimeout = 600 seconds (10 minutes).
• connectionRetryCount = 5.
• connectionRetryInterval = 500 milliseconds (0.5 seconds).

Constructor Summary

SimpleHibernateConnectionProvider()

Method Summary

void	addObserver(java.util.Observer o) Adds an observer.
void	close() Closes down the connection provider.
void	closeConnection(java.sql.Connection connection) Releases a connection back to the pool.
void	configure(java.util.Properties properties) Configures the connection provider.
java.sql.Connection	getConnection() Gets a connection from the pool.
boolean	supportsAggressiveRelease() Indicates if aggressive release is supported.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleHibernateConnectionProvider

public SimpleHibernateConnectionProvider()

Method Detail

configure

public void configure(java.util.Properties properties)
               throws org.hibernate.HibernateException

Configures the connection provider.

Specified by:

configure in interface org.hibernate.connection.ConnectionProvider

Parameters:

properties - The Hibernate configuration properties.

Throws:

org.hibernate.HibernateException

getConnection

public java.sql.Connection getConnection()
                                  throws java.sql.SQLException

Gets a connection from the pool.

Specified by:

getConnection in interface org.hibernate.connection.ConnectionProvider

Returns:

A connection.

Throws:

java.sql.SQLException

closeConnection

public void closeConnection(java.sql.Connection connection)
                     throws java.sql.SQLException

Releases a connection back to the pool.

Specified by:

closeConnection in interface org.hibernate.connection.ConnectionProvider

Parameters:

connection - The connection to return to the pool.

Throws:

java.sql.SQLException

close

public void close()

Closes down the connection provider.

Specified by:

close in interface org.hibernate.connection.ConnectionProvider

supportsAggressiveRelease

public boolean supportsAggressiveRelease()

Indicates if aggressive release is supported.

Specified by:

supportsAggressiveRelease in interface org.hibernate.connection.ConnectionProvider

Returns:

false (aggressive release is not supported).

addObserver

public void addObserver(java.util.Observer o)

Adds an observer.

The observer is notified whenever a bad JDBC connection is detected and whenever it takes more than one attempt to obtain a new connection. See SimpleConnectionPool for more details.

Parameters:

o - Observer.