org.alicebot.server.sql.pool
Class DbAccessRefsPoolMgr

java.lang.Object
  org.alicebot.server.sql.pool.ObjectPool
      org.alicebot.server.sql.pool.DbAccessRefsPoolMgr

public class DbAccessRefsPoolMgr
extends ObjectPool

Manages a pool of references to a database.

Author:

Cristian Mircioiu

Field Summary

protected java.lang.String	driver The name of the driver used by this object.
protected java.lang.String	password The password used by this object.
protected java.lang.String	url The URL string used by this object.
protected java.lang.String	user The user name used by this object.

Constructor Summary

DbAccessRefsPoolMgr(java.lang.String driver, java.lang.String url, java.lang.String user, java.lang.String password)
Constructs a DbAccessRefsPoolMgr object given a driver, url, user name and password.

Method Summary

protected java.lang.Object	create() Initializes the object by attempting to get a DbAccess object based on the parameters set.
protected void	expire(java.lang.Object o) Expires an object in the pool.
void	populate(int connectionCount) Builds a pool of the specified number of connections.
void	returnDbaRef(DbAccess dba) Checks back in and locks a DbAccess reference to the database.
DbAccess	takeDbaRef() Checks out and unlocks a DbAccess reference to the database.
protected boolean	validate(java.lang.Object o) Validates an object in the pool.

Methods inherited from class org.alicebot.server.sql.pool.ObjectPool

checkIn, checkOut, cleanUp

Methods inherited from class java.lang.Object

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

Field Detail

driver

protected java.lang.String driver

The name of the driver used by this object.

url

protected java.lang.String url

The URL string used by this object.

user

protected java.lang.String user

The user name used by this object.

password

protected java.lang.String password

The password used by this object.

Constructor Detail

DbAccessRefsPoolMgr

public DbAccessRefsPoolMgr(java.lang.String driver,
                           java.lang.String url,
                           java.lang.String user,
                           java.lang.String password)

Constructs a DbAccessRefsPoolMgr object given a driver, url, user name and password.

Parameters:

driver - name of the class representing the Driver to be used by the Driver manager

url - location of a data source name (dsn)

user - user name

password - password for user

Method Detail

create

protected java.lang.Object create()

Initializes the object by attempting to get a DbAccess object based on the parameters set.

Specified by:

create in class ObjectPool

populate

public void populate(int connectionCount)

Builds a pool of the specified number of connections.

Parameters:

connectionCount - the number of connections to create

returnDbaRef

public void returnDbaRef(DbAccess dba)

Checks back in and locks a DbAccess reference to the database.

Parameters:

dba - the reference to return

takeDbaRef

public DbAccess takeDbaRef()

Checks out and unlocks a DbAccess reference to the database.

Returns:

a reference to the database

validate

protected boolean validate(java.lang.Object o)

Description copied from class: ObjectPool

Validates an object in the pool.

Specified by:

validate in class ObjectPool

Parameters:

o - the object to validate

expire

protected void expire(java.lang.Object o)

Description copied from class: ObjectPool

Expires an object in the pool.

Specified by:

expire in class ObjectPool