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    1   /*
    2    * Copyright 2012 The Netty Project
    3    *
    4    * The Netty Project licenses this file to you under the Apache License,
    5    * version 2.0 (the "License"); you may not use this file except in compliance
    6    * with the License. You may obtain a copy of the License at:
    7    *
    8    *   http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
    12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
    13   * License for the specific language governing permissions and limitations
    14   * under the License.
    15   */
    16  package org.jboss.netty.channel.socket.nio;
    17
    18  import org.jboss.netty.channel.socket.Worker;
    19  import org.jboss.netty.util.ExternalResourceReleasable;
    20
    21  /**
    22   * This implementation of a {@link WorkerPool} should be used if you plan to share a
    23   * {@link WorkerPool} between different Factories. You will need to call {@link #destroy()} by your
    24   * own once you want to release any resources of it.
    25   *
    26   *
    27   */
    28  public final class ShareableWorkerPool<E extends Worker> implements WorkerPool<E> {
    29
    30      private final WorkerPool<E> wrapped;
    31
    32      public ShareableWorkerPool(WorkerPool<E> wrapped) {
    33          this.wrapped = wrapped;
    34      }
    35
    36      public E nextWorker() {
    37          return wrapped.nextWorker();
    38      }
    39
    40      /**
    41       * Destroy the {@link ShareableWorkerPool} and release all resources. After this is called its not usable anymore
    42       */
    43      public void destroy() {
    44          if (wrapped instanceof ExternalResourceReleasable) {
    45              ((ExternalResourceReleasable) wrapped).releaseExternalResources();
    46          }
    47      }
    48  }