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/*
* 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.jsonrpc.provider;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.util.EntityUtils;
import org.apache.tuscany.sca.assembly.EndpointReference;
import org.apache.tuscany.sca.binding.jsonrpc.JSONRPCBinding;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.invocation.DataExchangeSemantics;
import org.apache.tuscany.sca.invocation.Invoker;
import org.apache.tuscany.sca.invocation.Message;
import org.json.JSONArray;
import org.json.JSONObject;
/**
* Invoker for the JSONRPC Binding
*
* @version $Rev$ $Date$
*/
public class JSONRPCBindingInvoker implements Invoker, DataExchangeSemantics {
private EndpointReference endpointReference;
private Operation operation;
private String uri;
private HttpClient httpClient;
public JSONRPCBindingInvoker(EndpointReference endpointReference, Operation operation, HttpClient httpClient) {
this.endpointReference = endpointReference;
this.operation = operation;
this.uri = ((JSONRPCBinding) endpointReference.getBinding()).getURI();
this.httpClient = httpClient;
}
public Message invoke(Message msg) {
HttpPost post = null;
HttpResponse response = null;
try {
JSONObject jsonRequest = null;;
String requestId = "1";
Object[] args = null;
try {
// Extract the method
jsonRequest = new JSONObject();
jsonRequest.putOpt("method", "Service" + "." + msg.getOperation().getName());
// Extract the arguments
args = msg.getBody();
JSONArray array = new JSONArray();
for (int i = 0; i < args.length; i++) {
array.put(args[i]);
}
jsonRequest.putOpt("params", array);
jsonRequest.put("id", requestId);
} catch (Exception e) {
throw new RuntimeException("Unable to parse JSON parameter", e);
}
post = new HttpPost(uri);
String req = jsonRequest.toString();
StringEntity entity = new StringEntity(req, "application/json; charset\"UTF-8\"");
post.setEntity(entity);
response = httpClient.execute(post);
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
//success
JSONObject jsonResponse = null;
try {
jsonResponse = new JSONObject(EntityUtils.toString(response.getEntity()));
//check requestId
if (! jsonResponse.getString("id").equalsIgnoreCase(requestId)) {
throw new RuntimeException("Invalid response id:" + requestId );
}
msg.setBody(jsonResponse.get("result"));
} catch (Exception e) {
//FIXME Exceptions are not handled correctly here
// They should be reported to the client JavaScript as proper
// JavaScript exceptions.
throw new RuntimeException("Unable to parse response", e);
}
}
} catch (Exception e) {
e.printStackTrace();
msg.setFaultBody(e);
}
return msg;
}
private static JSONObject getJSONRequest(Message msg) {
JSONObject jsonRequest = null;;
Object[] args = null;
Object id = null;
try {
// Extract the method
jsonRequest = new JSONObject();
jsonRequest.putOpt("method", "Service" + "." + msg.getOperation().getName());
// Extract the arguments
args = msg.getBody();
JSONArray array = new JSONArray();
for (int i = 0; i < args.length; i++) {
array.put(args[i]);
}
jsonRequest.putOpt("params", array);
id = jsonRequest.put("id", "1");
} catch (Exception e) {
throw new RuntimeException("Unable to parse JSON parameter", e);
}
return jsonRequest;
}
public boolean allowsPassByReference() {
return true;
}
}
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