org.deegree.io
Class DBConnectionPool

java.lang.Object
  org.deegree.io.DBConnectionPool

public class DBConnectionPool
extends Object

class to manage a database connection pool. this is part of the combination of the object pool pattern an the singelton pattern.

Version:

07.02.2001

Author:

Andreas Poth

Method Summary

Connection	acquireConnection(String driver, String database, Properties properties) get an object from the object pool
Connection	acquireConnection(String driver, String database, String user, String password) get an object from the object pool
static DBConnectionPool	getInstance() realize singelton pattern using double checked locking pattern.
void	releaseConnection(Connection con, String driver, String database, Properties properties) releases a connection back to the pool
void	releaseConnection(Connection con, String driver, String database, String user, String password) releases a connection back to the pool

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static DBConnectionPool getInstance()

realize singelton pattern using double checked locking pattern.

Returns:

an instance of the data base pool. it is gauranteed that there exists only one instance of pool for each submitted class name.

acquireConnection

public Connection acquireConnection(String driver,
                                    String database,
                                    String user,
                                    String password)
                             throws DBPoolException

get an object from the object pool

Throws:

DBPoolException

acquireConnection

public Connection acquireConnection(String driver,
                                    String database,
                                    Properties properties)
                             throws DBPoolException

get an object from the object pool

Throws:

DBPoolException

releaseConnection

public void releaseConnection(Connection con,
                              String driver,
                              String database,
                              String user,
                              String password)
                       throws DBPoolException

releases a connection back to the pool

Throws:

DBPoolException

releaseConnection

public void releaseConnection(Connection con,
                              String driver,
                              String database,
                              Properties properties)
                       throws Exception

releases a connection back to the pool

Throws:

Exception