1 files changed, 174 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/binding-jsonp-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonp/runtime/JSONPInvoker.java b/sca-java-2.x/tags/2.0.1-RC1/modules/binding-jsonp-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonp/runtime/JSONPInvoker.java
new file mode 100644
index 0000000000..bda4ccf217
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/binding-jsonp-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonp/runtime/JSONPInvoker.java
@@ -0,0 +1,174 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.binding.jsonp.runtime;
+
+import java.io.BufferedReader;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+
+import org.apache.commons.codec.EncoderException;
+import org.apache.commons.codec.net.URLCodec;
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpResponse;
+import org.apache.http.client.HttpClient;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.impl.client.DefaultHttpClient;
+import org.apache.tuscany.sca.assembly.EndpointReference;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.invocation.Message;
+import org.codehaus.jackson.JsonGenerationException;
+import org.codehaus.jackson.JsonParseException;
+import org.codehaus.jackson.map.JsonMappingException;
+import org.codehaus.jackson.map.ObjectMapper;
+
+public class JSONPInvoker implements Invoker {
+    
+    protected Operation operation;
+    protected EndpointReference endpoint;
+
+    protected ObjectMapper mapper; // TODO: share mapper btw invoker and servlet or move to databinding
+
+    public JSONPInvoker(Operation operation, EndpointReference endpoint) {
+        this.operation = operation;
+        this.endpoint = endpoint;
+        this.mapper = new ObjectMapper();
+    }
+
+    public Message invoke(Message msg) {
+        try {
+
+            return doInvoke(msg);
+            
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public Message doInvoke(Message msg) throws JsonGenerationException, JsonMappingException, IOException, EncoderException {
+        String uri = endpoint.getDeployedURI() + "/" + operation.getName();
+        //String[] jsonArgs = objectsToJSON((Object[])msg.getBody());
+        String[] jsonArgs = objectsToJSONStrings((Object[])msg.getBody());
+
+        String responseJSON = invokeHTTPRequest(uri, jsonArgs);
+
+        //Object response = jsonToObjects(responseJSON)[0];
+        msg.setBody(responseJSON);
+
+        return msg;
+    }
+
+    protected String invokeHTTPRequest(String url, String[] jsonArgs) throws IOException, EncoderException {
+        
+         HttpClient httpclient = new DefaultHttpClient();
+         
+         
+         URLCodec uc = new URLCodec();
+         for (int i=0 ; i<jsonArgs.length; i++) {
+             if (i == 0) {
+                 url += '?';
+             } else {
+                 url += '&';
+             }
+             url += "arg" + i + "=";
+             url += uc.encode(jsonArgs[i]);
+         }
+
+         HttpGet httpget = new HttpGet(url); 
+
+         HttpResponse response = httpclient.execute(httpget);
+         
+         StringBuffer responseJSON = new StringBuffer(); 
+
+         HttpEntity entity = response.getEntity();
+         
+         // If the response does not enclose an entity, there is no need
+         // to worry about connection release
+         if (entity != null) {
+             InputStream instream = entity.getContent();
+             try {
+                 
+                 BufferedReader reader = new BufferedReader(new InputStreamReader(instream));
+                 String s = null;
+                 while ((s = reader.readLine()) != null) {
+                     responseJSON.append(s);
+                 }
+                 
+             } catch (IOException ex) {
+         
+                 // In case of an IOException the connection will be released
+                 // back to the connection manager automatically
+                 throw ex;
+                 
+             } catch (RuntimeException ex) {
+         
+                 // In case of an unexpected exception you may want to abort
+                 // the HTTP request in order to shut down the underlying 
+                 // connection and release it back to the connection manager.
+                 httpget.abort();
+                 throw ex;
+                 
+             } finally {
+         
+                 // Closing the input stream will trigger connection release
+                 instream.close();
+                 
+             }
+             
+             // When HttpClient instance is no longer needed, 
+             // shut down the connection manager to ensure
+             // immediate deallocation of all system resources
+             httpclient.getConnectionManager().shutdown();        
+         }
+         
+         return responseJSON.toString();
+    }
+
+/* Not required now JSON conversion is delegated to databinding   
+    protected String[] objectsToJSON(Object[] msgArgs) throws JsonGenerationException, JsonMappingException, IOException {
+        String[] jsonArgs = new String[msgArgs.length];
+        for (int i=0; i<msgArgs.length; i++) {
+            ByteArrayOutputStream os = new ByteArrayOutputStream();
+            mapper.writeValue(os , msgArgs[i]);
+            jsonArgs[i] = os.toString();
+        }
+        return jsonArgs;
+    }
+*/
+    
+    protected String[] objectsToJSONStrings(Object[] msgArgs) throws JsonGenerationException, JsonMappingException, IOException {
+        String[] jsonArgs = new String[msgArgs.length];
+        for (int i=0; i<msgArgs.length; i++) {
+            jsonArgs[i] = msgArgs[i].toString();
+        }
+        return jsonArgs;
+    }    
+
+/* Not required now JSON conversion is delegated to databinding    
+    protected Object[] jsonToObjects(String jsonRequest) throws JsonParseException, JsonMappingException, IOException {
+        Class<?> c = new Object[0].getClass();
+        Object[] args = (Object[])mapper.readValue("[" + jsonRequest +"]", c);
+        return args;
+    }
+*/
+    
+}