SynchToAsynchChannelFactoryAdaptor xref

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    1   /***
    2    *
    3    * Copyright 2004 Hiram Chirino
    4    *
    5    * Licensed under the Apache License, Version 2.0 (the "License");
    6    * you may not use this file except in compliance with the License.
    7    * You may obtain a copy of the License at
    8    *
    9    * http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   *
    17   **/
    18  package org.activeio.adapter;
    19
    20  import java.io.IOException;
    21  import java.net.URI;
    22
    23  import org.activeio.AsynchChannel;
    24  import org.activeio.AsynchChannelFactory;
    25  import org.activeio.AsynchChannelServer;
    26  import org.activeio.ChannelFactory;
    27  import org.activeio.SynchChannelFactory;
    28
    29  import EDU.oswego.cs.dl.util.concurrent.Executor;
    30
    31  /***
    32   * @version $Revision$
    33   */
    34  public class SynchToAsynchChannelFactoryAdaptor implements AsynchChannelFactory {
    35
    36      private final SynchChannelFactory synchChannelFactory;
    37      private final Executor executor;
    38
    39      static public AsynchChannelFactory adapt(SynchChannelFactory channelFactory) {
    40          return adapt(channelFactory, ChannelFactory.DEFAULT_EXECUTOR);
    41      }
    42
    43      static public AsynchChannelFactory adapt(SynchChannelFactory channelFactory, Executor executor ) {
    44
    45          // It might not need adapting
    46          if( channelFactory instanceof AsynchChannelFactory ) {
    47              return (AsynchChannelFactory) channelFactory;
    48          }
    49
    50          // Can we just just undo the adaptor
    51          if( channelFactory.getClass() == AsynchToSynchChannelFactoryAdaptor.class ) {
    52              return ((AsynchToSynchChannelFactoryAdaptor)channelFactory).getAsynchChannelFactory();
    53          }
    54
    55          return new SynchToAsynchChannelFactoryAdaptor((SynchChannelFactory)channelFactory, executor);
    56      }
    57
    58      /***
    59       * @deprecated {@see #adapt(SynchChannelFactory)}
    60       */
    61      public SynchToAsynchChannelFactoryAdaptor(final SynchChannelFactory next) {
    62          this(next, ChannelFactory.DEFAULT_EXECUTOR);
    63      }
    64
    65      /***
    66       * @deprecated {@see #adapt(SynchChannelFactory, Executor)}
    67       */
    68      public SynchToAsynchChannelFactoryAdaptor(final SynchChannelFactory next, Executor executor) {
    69          this.synchChannelFactory = next;
    70          this.executor = executor;
    71      }
    72
    73      public AsynchChannel openAsynchChannel(URI location) throws IOException {
    74          return SynchToAsynchChannelAdapter.adapt(synchChannelFactory.openSynchChannel(location),executor);
    75      }
    76
    77      public AsynchChannelServer bindAsynchChannel(URI location) throws IOException {
    78          return new SynchToAsynchChannelServerAdapter(synchChannelFactory.bindSynchChannel(location),executor);
    79      }
    80
    81      public SynchChannelFactory getSynchChannelFactory() {
    82          return synchChannelFactory;
    83      }
    84  }