K
- the type of keys in this poolV
- the type of objects held in this poolpublic abstract class BaseKeyedObjectPool<K,V> extends java.lang.Object implements KeyedObjectPool<K,V>
KeyedObjectPool
.
Optional operations are implemented to either do nothing, return a value
indicating it is unsupported or throw UnsupportedOperationException
.Constructor and Description |
---|
BaseKeyedObjectPool() |
Modifier and Type | Method and Description |
---|---|
void |
addObject(K key)
Not supported in this base implementation.
|
abstract V |
borrowObject(K key)
Obtains an instance from this pool for the specified
key . |
void |
clear()
Not supported in this base implementation.
|
void |
clear(K key)
Not supported in this base implementation.
|
void |
close()
Close this pool.
|
int |
getNumActive()
Not supported in this base implementation.
|
int |
getNumActive(K key)
Not supported in this base implementation.
|
int |
getNumIdle()
Not supported in this base implementation.
|
int |
getNumIdle(K key)
Not supported in this base implementation.
|
abstract void |
invalidateObject(K key,
V obj)
Invalidates an object from the pool.
|
abstract void |
returnObject(K key,
V obj)
Return an instance to the pool.
|
public void addObject(K key) throws java.lang.Exception, java.lang.UnsupportedOperationException
UnsupportedOperationException
,
subclasses should override this behavior.addObject
in interface KeyedObjectPool<K,V>
key
- ignoredjava.lang.UnsupportedOperationException
java.lang.Exception
- when KeyedPoolableObjectFactory.makeObject(K)
fails.java.lang.IllegalStateException
- after KeyedObjectPool.close()
has been called on this pool.public abstract V borrowObject(K key) throws java.lang.Exception
key
.
Instances returned from this method will have been either newly created with
makeObject
or will be a previously idle object and
have been activated with activateObject
and
then validated with validateObject
.
By contract, clients must return the borrowed object using
returnObject
, invalidateObject
, or a related method
as defined in an implementation or sub-interface,
using a key
that is equivalent
to the one used to
borrow the instance in the first place.
The behaviour of this method when the pool has been exhausted
is not strictly specified (although it may be specified by implementations).
Older versions of this method would return null
to indicate exhaustion,
newer versions are encouraged to throw a NoSuchElementException
.
borrowObject
in interface KeyedObjectPool<K,V>
key
- the key used to obtain the objectjava.lang.IllegalStateException
- after close
has been called on this pooljava.lang.Exception
- when makeObject
throws an exceptionjava.util.NoSuchElementException
- when the pool is exhausted and cannot or will not return another instancepublic void clear() throws java.lang.Exception, java.lang.UnsupportedOperationException
clear
in interface KeyedObjectPool<K,V>
java.lang.UnsupportedOperationException
java.lang.Exception
public void clear(K key) throws java.lang.Exception, java.lang.UnsupportedOperationException
clear
in interface KeyedObjectPool<K,V>
key
- ignoredjava.lang.UnsupportedOperationException
java.lang.Exception
public void close() throws java.lang.Exception
isClosed
and assertOpen
.close
in interface KeyedObjectPool<K,V>
java.lang.Exception
public int getNumActive() throws java.lang.UnsupportedOperationException
getNumActive
in interface KeyedObjectPool<K,V>
java.lang.UnsupportedOperationException
- deprecated: when this implementation doesn't support the operationpublic int getNumActive(K key) throws java.lang.UnsupportedOperationException
getNumActive
in interface KeyedObjectPool<K,V>
key
- ignoredjava.lang.UnsupportedOperationException
- deprecated: when this implementation doesn't support the operationpublic int getNumIdle() throws java.lang.UnsupportedOperationException
getNumIdle
in interface KeyedObjectPool<K,V>
java.lang.UnsupportedOperationException
- deprecated: when this implementation doesn't support the operationpublic int getNumIdle(K key) throws java.lang.UnsupportedOperationException
getNumIdle
in interface KeyedObjectPool<K,V>
key
- ignoredjava.lang.UnsupportedOperationException
- deprecated: when this implementation doesn't support the operationpublic abstract void invalidateObject(K key, V obj) throws java.lang.Exception
Invalidates an object from the pool.
By contract, obj
must have been obtained
using borrowObject
using a key
that is
equivalent to the one used to borrow the Object
in the first place.
This method should be used when an object that has been borrowed is determined (due to an exception or other problem) to be invalid.
invalidateObject
in interface KeyedObjectPool<K,V>
key
- the key used to obtain the objectobj
- a borrowed
instance to be returned.java.lang.Exception
public abstract void returnObject(K key, V obj) throws java.lang.Exception
obj
must have been obtained
using borrowObject
or a related method as defined in an implementation
or sub-interface
using a key
that is equivalent to the one used to
borrow the instance in the first place.returnObject
in interface KeyedObjectPool<K,V>
key
- the key used to obtain the objectobj
- a borrowed
instance to be returned.java.lang.Exception
Copyright © 2001-2012 Apache Software Foundation. Documenation generated September 11 2014.