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1   /*
2    * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
3    * The software in this package is published under the terms of the CPAL v1.0
4    * license, a copy of which has been included with this distribution in the
5    * LICENSE.txt file.
6    */
7   package org.mule.component;
8   
9   import org.mule.OptimizedRequestContext;
10  import org.mule.RequestContext;
11  import org.mule.api.MuleEvent;
12  import org.mule.api.MuleException;
13  import org.mule.api.MuleRuntimeException;
14  import org.mule.api.component.InterfaceBinding;
15  import org.mule.api.endpoint.ImmutableEndpoint;
16  import org.mule.api.endpoint.OutboundEndpoint;
17  import org.mule.api.processor.MessageProcessor;
18  import org.mule.api.routing.OutboundRouter;
19  import org.mule.config.i18n.CoreMessages;
20  import org.mule.routing.outbound.OutboundPassThroughRouter;
21  
22  import java.lang.reflect.Proxy;
23  
24  import org.apache.commons.logging.Log;
25  import org.apache.commons.logging.LogFactory;
26  
27  public class DefaultInterfaceBinding implements InterfaceBinding
28  {
29      protected static final Log logger = LogFactory.getLog(DefaultInterfaceBinding.class);
30  
31      private Class<?> interfaceClass;
32  
33      private String methodName;
34  
35      // The router used to actually dispatch the message
36      protected OutboundRouter outboundRouter;
37  
38      public MuleEvent process(MuleEvent event) throws MuleException
39      {
40          OptimizedRequestContext.unsafeRewriteEvent(event.getMessage());
41          return outboundRouter.process(RequestContext.getEvent());
42      }
43  
44      public void setInterface(Class<?> interfaceClass)
45      {
46          this.interfaceClass = interfaceClass;
47      }
48  
49      public Class<?> getInterface()
50      {
51          return interfaceClass;
52      }
53  
54      public String getMethod()
55      {
56          return methodName;
57      }
58  
59      public void setMethod(String methodName)
60      {
61          this.methodName = methodName;
62      }
63  
64      public Object createProxy(Object target)
65      {
66          try
67          {
68              Object proxy = Proxy.newProxyInstance(getInterface().getClassLoader(), new Class[]{getInterface()},
69                      new BindingInvocationHandler(this));
70              if (logger.isDebugEnabled())
71              {
72                  logger.debug("Have proxy?: " + (null != proxy));
73              }
74              return proxy;
75  
76          }
77          catch (Exception e)
78          {
79              throw new MuleRuntimeException(CoreMessages.failedToCreateProxyFor(target), e);
80          }
81      }
82  
83      public void setEndpoint(ImmutableEndpoint e) throws MuleException
84      {
85          if (e instanceof OutboundEndpoint)
86          {
87              outboundRouter = new OutboundPassThroughRouter();
88              outboundRouter.addRoute((OutboundEndpoint) e);
89              outboundRouter.setTransactionConfig(e.getTransactionConfig());
90              outboundRouter.setMuleContext(e.getMuleContext());
91          }
92          else
93          {
94              throw new IllegalArgumentException("An outbound endpoint is required for Interface binding");
95          }
96      }
97  
98      public Class<?> getInterfaceClass()
99      {
100         return interfaceClass;
101     }
102 
103     @Override
104     public String toString()
105     {
106         final StringBuffer sb = new StringBuffer();
107         sb.append("DefaultInterfaceBinding");
108         sb.append("{method='").append(methodName).append('\'');
109         sb.append(", interface=").append(interfaceClass);
110         sb.append('}');
111         return sb.toString();
112     }
113 
114     public ImmutableEndpoint getEndpoint()
115     {
116         if (outboundRouter != null)
117         {
118             MessageProcessor target = outboundRouter.getRoutes().get(0);
119             return target instanceof ImmutableEndpoint ? (ImmutableEndpoint) target : null;
120         }
121         else
122         {
123             return null;
124         }
125     }
126 }