HttpInvokerRequestExecutor


1   /*
2    * Copyright 2002-2005 the original author or authors.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * 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,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.springframework.remoting.httpinvoker;
18  
19  import java.io.IOException  ;
20  
21  import org.springframework.remoting.support.RemoteInvocation;
22  import org.springframework.remoting.support.RemoteInvocationResult;
23  
24  /**
25   * Strategy interface for actual execution of an HTTP invoker request.
26   * Used by HttpInvokerClientInterceptor and its subclass
27   * HttpInvokerProxyFactoryBean.
28   *
29   * <p>Two implementations are provided out of the box:
30   * <ul>
31   * <li><b>SimpleHttpInvokerRequestExecutor:</b>
32   * Uses J2SE facilities to execute POST requests, without support
33   * for HTTP authentication or advanced configuration options.
34   * <li><b>CommonsHttpInvokerRequestExecutor:</b>
35   * Uses Jakarta's Commons HttpClient to execute POST requests,
36   * allowing to use a preconfigured HttpClient instance
37   * (potentially with authentication, HTTP connection pooling, etc).
38   * </ul>
39   *
40   * @author Juergen Hoeller
41   * @since 1.1
42   * @see HttpInvokerClientInterceptor#setHttpInvokerRequestExecutor
43   */
44  public interface HttpInvokerRequestExecutor {
45  
46      /**
47       * Execute a request to send the given remote invocation.
48       * @param config the HTTP invoker configuration that specifies the
49       * target service
50       * @param invocation the RemoteInvocation to execute
51       * @return the RemoteInvocationResult object
52       * @throws IOException if thrown by I/O operations
53       * @throws ClassNotFoundException if thrown during deserialization
54       * @throws Exception in case of general errors
55       */
56      RemoteInvocationResult executeRequest(HttpInvokerClientConfiguration config, RemoteInvocation invocation)
57              throws Exception  ;
58  
59  }
60
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