| /* |
| * 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.getBinding().getURI() + "/" + 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; |
| } |
| */ |
| |
| } |