Reinitializes an instance to be returned by the pool.
Destroys an instance no longer needed by the pool. <p> It is important for implementations of this method to be aware that there is no guarantee about what state <code>obj</code> will be in and the implementation should be prepared to handle unexpected errors. </p> <p> Also, an implementation must take in to consideration that instances lost to the garbage collector may never be destroyed. </p>
Creates an instance that can be served by the pool and wrap it in a {@link PooledObject} to be managed by the pool.
Uninitializes an instance to be returned to the idle object pool.
Ensures that the instance is safe to be returned by the pool.
An interface defining life-cycle methods for instances to be served by an {@link ObjectPool}. <p> By contract, when an {@link ObjectPool} delegates to a {@link PooledObjectFactory}, </p> <ol> <li> {@link #makeObject} is called whenever a new instance is needed. </li> <li> {@link #activateObject} is invoked on every instance that has been {@link #passivateObject passivated} before it is {@link ObjectPool#borrowObject borrowed} from the pool. </li> <li> {@link #validateObject} may be invoked on {@link #activateObject activated} instances to make sure they can be {@link ObjectPool#borrowObject borrowed} from the pool. {@link #validateObject} may also be used to test an instance being {@link ObjectPool#returnObject returned} to the pool before it is {@link #passivateObject passivated}. It will only be invoked on an activated instance. </li> <li> {@link #passivateObject} is invoked on every instance when it is returned to the pool. </li> <li> {@link #destroyObject} is invoked on every instance when it is being "dropped" from the pool (whether due to the response from {@link #validateObject}, or for reasons specific to the pool implementation.) There is no guarantee that the instance being destroyed will be considered active, passive or in a generally consistent state. </li> </ol> {@link PooledObjectFactory} must be thread-safe. The only promise an {@link ObjectPool} makes is that the same instance of an object will not be passed to more than one method of a <code>PoolableObjectFactory</code> at a time. <p> While clients of a {@link KeyedObjectPool} borrow and return instances of the underlying value type {@code V}, the factory methods act on instances of {@link PooledObject PooledObject<V>}. These are the object wrappers that pools use to track and maintain state information about the objects that they manage. </p>
@param <T> Type of element managed in this factory.
@see ObjectPool