/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* Pool of reusable objects that are indistinguishable from each other,
* such as JAXB marshallers.
*
* @author Kohsuke Kawaguchi
*/
public interface Pool<T> {
/**
* Gets a new object from the pool.
*
* <p>
* If no object is available in the pool, this method creates a new one.
*/
/**
* Returns an object back to the pool.
*/
/**
* Default implementation that uses {@link ConcurrentLinkedQueue}
* as the data store.
*
* <h2>Note for Implementors</h2>
* <p>
* Don't rely on the fact that this class extends from {@link ConcurrentLinkedQueue}.
*/
/**
* Gets a new object from the pool.
*
* <p>
* If no object is available in the pool, this method creates a new one.
*
* @return
* always non-null.
*/
if(t==null) {
return create();
}
return t;
}
/**
* Returns an object back to the pool.
*/
public final void recycle(T t) {
}
if (q != null) {
ConcurrentLinkedQueue<T> d = q.get();
if (d != null) {
return d;
}
}
// overwrite the queue
ConcurrentLinkedQueue<T> d = new ConcurrentLinkedQueue<T>();
return d;
}
/**
* Creates a new instance of object.
*
* <p>
* This method is used when someone wants to
* {@link #take() take} an object from an empty pool.
*
* <p>
* Also note that multiple threads may call this method
* concurrently.
*/
}
}