com.gargoylesoftware.base.resource.jdbc

Class JDBCResourceFactory

java.lang.Object

com.gargoylesoftware.base.resource.ResourceFactory

com.gargoylesoftware.base.resource.jdbc.JDBCResourceFactory

public class JDBCResourceFactory
extends ResourceFactory

A ResourceFactory for JDBC connections

Version:

$Revision: 1.4 $

Author:

Mike Bowler

Constructor Summary

Constructors

Constructor and Description
JDBCResourceFactory(String databaseName, String userName, String password) Create the factory.
JDBCResourceFactory(String databaseName, String userName, String password, boolean verifyThatConnectionCanBeOpened) Create the factory.

Method Summary

Modifier and Type	Method and Description
protected Connection	allocateRealConnection(String databaseName, String userName, String password) Allocate a real database connection from the DriverManager
protected void	freeRealConnection(Connection connection) Free a real database connection
protected ManagedResource	getResourceImpl(ResourceManager resourceManager) Allocate a resource for the specified store
boolean	reinitializeResourceIfPossible(ManagedResource resource) Reinitialize the resource to a known state.
protected void	releaseResourceImpl(ResourceManager resourceManager, ManagedResource resource) Release the specified resource.

Methods inherited from class com.gargoylesoftware.base.resource.ResourceFactory

getResource, releaseAllResources, releaseResource

Methods inherited from class java.lang.Object

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

Constructor Detail

JDBCResourceFactory

public JDBCResourceFactory(String databaseName,
                           String userName,
                           String password)
                    throws SQLException

Create the factory. The database driver must have been registered prior to creating an instance of this class. This constructor will always try to allocate one connection right away to ensure that the database information was entered correctly.

Parameters:

databaseName - The name of the database

userName - The user id that we will use to connect to the database

password - The password for the specified user

Throws:

SQLException - If an error occurs

JDBCResourceFactory

public JDBCResourceFactory(String databaseName,
                           String userName,
                           String password,
                           boolean verifyThatConnectionCanBeOpened)
                    throws SQLException

Create the factory. The database driver must have been registered prior to creating an instance of this class.

Parameters:

databaseName - The name of the database

userName - The user id that we will use to connect to the database

password - The password for the specified user

verifyThatConnectionCanBeOpened - If true than one connection will be immediately allocated and then freed from the specified database

Throws:

SQLException - If an error occurs

Method Detail

reinitializeResourceIfPossible

public boolean reinitializeResourceIfPossible(ManagedResource resource)

Reinitialize the resource to a known state. This is required for resource pooling as all resources being returned from a pool must have been initialized to a known state.

Specified by:

reinitializeResourceIfPossible in class ResourceFactory

Parameters:

resource - the resource to reinitialize

Returns:

true if the resource was successfully reinitialized

getResourceImpl

protected ManagedResource getResourceImpl(ResourceManager resourceManager)
                                   throws Exception

Allocate a resource for the specified store

Specified by:

getResourceImpl in class ResourceFactory

Parameters:

resourceManager - The resource manager that owns this factory

Returns:

The new resource

Throws:

Exception - If an error occurs

releaseResourceImpl

protected void releaseResourceImpl(ResourceManager resourceManager,
                                   ManagedResource resource)
                            throws Exception

Release the specified resource. It must have been allocated by the specified store

Specified by:

releaseResourceImpl in class ResourceFactory

Parameters:

resource - The resource that we are releasing

resourceManager - The manager that is controlling this factory

Throws:

Exception - If an error occurs

allocateRealConnection

protected final Connection allocateRealConnection(String databaseName,
                                                  String userName,
                                                  String password)
                                           throws SQLException

Allocate a real database connection from the DriverManager

Parameters:

databaseName - The name of the database

userName - The user id that we will use to connect to the database

password - The password for the specified user

Returns:

A new connection

Throws:

SQLException - If an error occurs

freeRealConnection

protected final void freeRealConnection(Connection connection)
                                 throws SQLException

Free a real database connection

Parameters:

connection - The connection to release

Throws:

SQLException - If an error occurs