Package org.apache.tomcat.dbcp.pool2

Class BasePooledObjectFactory<T>

java.lang.Object

org.apache.tomcat.dbcp.pool2.BaseObject

org.apache.tomcat.dbcp.pool2.BasePooledObjectFactory<T>

Type Parameters:

T - Type of element managed in this factory.

All Implemented Interfaces:

PooledObjectFactory<T>

public abstract class BasePooledObjectFactory<T>
extends BaseObject
implements PooledObjectFactory<T>

A base implementation of PoolableObjectFactory.

All operations defined here are essentially no-op's.

This class is immutable, and therefore thread-safe

Since:

2.0

See Also:

• PooledObjectFactory
• BaseKeyedPooledObjectFactory

Constructor Summary

Constructors

Constructor	Description
BasePooledObjectFactory()

Method Summary

Modifier and Type	Method	Description
void	activateObject(PooledObject<T> p)	No-op.
abstract T	create()	Creates an object instance, to be wrapped in a PooledObject.
void	destroyObject(PooledObject<T> p)	No-op.
PooledObject<T>	makeObject()	Creates an instance that can be served by the pool and wrap it in a PooledObject to be managed by the pool.
void	passivateObject(PooledObject<T> p)	No-op.
boolean	validateObject(PooledObject<T> p)	This implementation always returns true.
abstract PooledObject<T>	wrap(T obj)	Wrap the provided instance with an implementation of PooledObject.

Methods inherited from class org.apache.tomcat.dbcp.pool2.BaseObject

toString, toStringAppendFields

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.tomcat.dbcp.pool2.PooledObjectFactory

destroyObject

Constructor Details

BasePooledObjectFactory

public BasePooledObjectFactory()

Method Details

create

public abstract T create()
                  throws Exception

Creates an object instance, to be wrapped in a PooledObject.

This method must support concurrent, multi-threaded activation.

Returns:

an instance to be served by the pool

Throws:

Exception - if there is a problem creating a new instance, this will be propagated to the code requesting an object.

wrap

public abstract PooledObject<T> wrap(T obj)

Wrap the provided instance with an implementation of PooledObject.

Parameters:

obj - the instance to wrap

Returns:

The provided instance, wrapped by a PooledObject

makeObject

public PooledObject<T> makeObject()
                           throws Exception

Description copied from interface: PooledObjectFactory

Creates an instance that can be served by the pool and wrap it in a PooledObject to be managed by the pool.

Specified by:

makeObject in interface PooledObjectFactory<T>

Returns:

a PooledObject wrapping an instance that can be served by the pool

Throws:

Exception - if there is a problem creating a new instance, this will be propagated to the code requesting an object.

destroyObject

public void destroyObject(PooledObject<T> p)
                   throws Exception

No-op.

Specified by:

destroyObject in interface PooledObjectFactory<T>

Parameters:

p - ignored

Throws:

Exception - should be avoided as it may be swallowed by the pool implementation.

See Also:

• PooledObjectFactory.validateObject(org.apache.tomcat.dbcp.pool2.PooledObject<T>)
• ObjectPool.invalidateObject(T)

validateObject

public boolean validateObject(PooledObject<T> p)

This implementation always returns true.

Specified by:

validateObject in interface PooledObjectFactory<T>

Parameters:

p - ignored

Returns:

true

activateObject

public void activateObject(PooledObject<T> p)
                    throws Exception

No-op.

Specified by:

activateObject in interface PooledObjectFactory<T>

Parameters:

p - ignored

Throws:

Exception - if there is a problem activating obj, this exception may be swallowed by the pool.

See Also:

• PooledObjectFactory.destroyObject(org.apache.tomcat.dbcp.pool2.PooledObject<T>)

passivateObject

public void passivateObject(PooledObject<T> p)
                     throws Exception

No-op.

Specified by:

passivateObject in interface PooledObjectFactory<T>

Parameters:

p - ignored

Throws:

Exception - if there is a problem passivating obj, this exception may be swallowed by the pool.

See Also:

• PooledObjectFactory.destroyObject(org.apache.tomcat.dbcp.pool2.PooledObject<T>)