com.sh.pool

接口 KeyedPoolableObjectFactory<K,V>

所有已知实现类:

BaseKeyedPoolableObjectFactory

public interface KeyedPoolableObjectFactory<K,V>

Description: KeyedPoolableObjectFactory Title:首亨软件 - CRM、TSS、ERP等信息化管理软件

版本:

3.0

作者:

江兴春

方法概要

限定符和类型	方法和说明
void	activateObject(K key, V obj) Reinitialize an instance to be returned by the pool.
void	destroyObject(K key, V obj) Destroy an instance no longer needed by the pool.
V	makeObject(K key) Create an instance that can be served by the pool.
void	passivateObject(K key, V obj) Uninitialize an instance to be returned to the idle object pool.
boolean	validateObject(K key, V obj) Ensures that the instance is safe to be returned by the pool.

方法详细资料

makeObject

V makeObject(K key)
      throws java.lang.Exception

Create an instance that can be served by the pool.

参数:

key - the key used when constructing the object

返回:

an instance that can be served by the pool.

抛出:

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

destroyObject

void destroyObject(K key,
                   V obj)
            throws java.lang.Exception

Destroy an instance no longer needed by the pool.

It is important for implementations of this method to be aware that there is no guarantee about what state obj will be in and the implementation should be prepared to handle unexpected errors.

Also, an implementation must take in to consideration that instances lost to the garbage collector may never be destroyed.

参数:

key - the key used when selecting the instance

obj - the instance to be destroyed

抛出:

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

另请参阅:

validateObject(K, V), KeyedObjectPool.invalidateObject(K, V)

validateObject

boolean validateObject(K key,
                       V obj)

Ensures that the instance is safe to be returned by the pool. Returns false if obj should be destroyed.

参数:

key - the key used when selecting the object

obj - the instance to be validated

返回:

false if obj is not valid and should be dropped from the pool, true otherwise.

activateObject

void activateObject(K key,
                    V obj)
             throws java.lang.Exception

Reinitialize an instance to be returned by the pool.

参数:

key - the key used when selecting the object

obj - the instance to be activated

抛出:

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

另请参阅:

destroyObject(K, V)

passivateObject

void passivateObject(K key,
                     V obj)
              throws java.lang.Exception

Uninitialize an instance to be returned to the idle object pool.

参数:

key - the key used when selecting the object

obj - the instance to be passivated

抛出:

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

另请参阅:

destroyObject(K, V)