TransportServerChannelProvider xref

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    1   /***
    2    *
    3    * Copyright 2004 Protique Ltd
    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.codehaus.activemq.transport;
    19
    20  import org.codehaus.activemq.message.WireFormat;
    21  import org.codehaus.activemq.util.FactoryFinder;
    22
    23  import javax.jms.JMSException;
    24  import java.io.IOException;
    25  import java.net.URI;
    26  import java.net.URISyntaxException;
    27
    28  /***
    29   * locates a protocol specific TransportServerChannelFactory
    30   *
    31   * @version $Revision: 1.13 $
    32   */
    33  public class TransportServerChannelProvider {
    34
    35      private static FactoryFinder finder = new FactoryFinder("META-INF/services/org/codehaus/activemq/transport/server/");
    36
    37      /***
    38       * Create a Channel used for the Broker to listen to remove connections
    39       *
    40       * @param bindAddress
    41       * @return the TransportServerChannel bound to the address
    42       * @throws JMSException
    43       */
    44      public static TransportServerChannel create(WireFormat wireFormat, URI bindAddress) throws JMSException {
    45          return getFactory(bindAddress.getScheme()).create(wireFormat, bindAddress);
    46      }
    47
    48      /***
    49       * Create a Channel used for the Broker to listen to remove connections
    50       *
    51       * @param bindAddress
    52       * @return the TransportServerChannel bound to the address
    53       * @throws JMSException
    54       */
    55      public static TransportServerChannel newInstance(WireFormat wireFormat, String bindAddress) throws JMSException, URISyntaxException {
    56          return create(wireFormat, new URI(bindAddress));
    57      }
    58
    59      protected static TransportServerChannelFactory getFactory(String protocol) throws JMSException {
    60          try {
    61              Object value = finder.newInstance(protocol);
    62              if (value instanceof TransportServerChannelFactory) {
    63                  return (TransportServerChannelFactory) value;
    64              }
    65              else {
    66                  throw new JMSException("Factory does not implement TransportServerChannelFactory: " + value);
    67              }
    68          }
    69          catch (IllegalAccessException e) {
    70              throw createJMSexception(protocol, e);
    71          }
    72          catch (InstantiationException e) {
    73              throw createJMSexception(protocol, e);
    74          }
    75          catch (IOException e) {
    76              throw createJMSexception(protocol, e);
    77          }
    78          catch (ClassNotFoundException e) {
    79              throw createJMSexception(protocol, e);
    80          }
    81
    82      }
    83
    84      protected static JMSException createJMSexception(String protocol, Exception e) {
    85          JMSException answer = new JMSException("Could not load protocol: " + protocol + ". Reason: " + e);
    86          answer.setLinkedException(e);
    87          return answer;
    88      }
    89  }