diff options
Diffstat (limited to 'branches/sca-android-r643746/modules/binding-jsonrpc/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/JSONRPCServiceServlet.java')
-rw-r--r-- | branches/sca-android-r643746/modules/binding-jsonrpc/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/JSONRPCServiceServlet.java | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/branches/sca-android-r643746/modules/binding-jsonrpc/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/JSONRPCServiceServlet.java b/branches/sca-android-r643746/modules/binding-jsonrpc/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/JSONRPCServiceServlet.java new file mode 100644 index 0000000000..afef327291 --- /dev/null +++ b/branches/sca-android-r643746/modules/binding-jsonrpc/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/JSONRPCServiceServlet.java @@ -0,0 +1,284 @@ +/*
+ * 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;
+
+import java.io.BufferedReader;
+import java.io.CharArrayWriter;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.io.UnsupportedEncodingException;
+import java.lang.reflect.InvocationTargetException;
+import java.util.List;
+
+import javax.servlet.ServletConfig;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpSession;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.runtime.RuntimeComponentService;
+import org.apache.tuscany.sca.runtime.RuntimeWire;
+import org.json.JSONArray;
+import org.json.JSONObject;
+import org.osoa.sca.ServiceRuntimeException;
+
+import com.metaparadigm.jsonrpc.JSONRPCBridge;
+import com.metaparadigm.jsonrpc.JSONRPCServlet;
+
+/**
+ * Servlet that handles JSON-RPC requests invoking SCA services.
+ *
+ * There is an instance of this Servlet for each <binding.jsonrpc>
+ */
+public class JSONRPCServiceServlet extends JSONRPCServlet {
+ private static final long serialVersionUID = 1L;
+
+ transient Binding binding;
+ transient String serviceName;
+ transient Object serviceInstance;
+ transient RuntimeComponentService componentService;
+ transient InterfaceContract serviceContract;
+ transient Class<?> serviceInterface;
+
+ public JSONRPCServiceServlet(Binding binding,
+ RuntimeComponentService componentService,
+ InterfaceContract serviceContract,
+ Class<?> serviceInterface,
+ Object serviceInstance) {
+ this.binding = binding;
+ this.serviceName = binding.getName();
+ this.componentService = componentService;
+ this.serviceContract = serviceContract;
+ this.serviceInterface = serviceInterface;
+ this.serviceInstance = serviceInstance;
+ }
+
+ /**
+ * Override to do nothing as the JSONRPCServlet is setup by the
+ * service method in this class.
+ */
+ @Override
+ public void init(ServletConfig config) {
+ }
+
+ @Override
+ public void service(HttpServletRequest request, HttpServletResponse response) throws IOException {
+ if ("smd".equals(request.getQueryString())) {
+ handleSMDRequest(request, response);
+ } else {
+ try {
+ handleServiceRequest(request, response);
+ } finally {
+ HttpSession session = request.getSession(false);
+ if (session != null) {
+ session.removeAttribute("JSONRPCBridge");
+ }
+ }
+ }
+ }
+
+ private void handleServiceRequest(HttpServletRequest request, HttpServletResponse response)
+ throws IOException {
+ // Encode using UTF-8, although We are actually ASCII clean as
+ // all unicode data is JSON escaped using backslash u. This is
+ // less data efficient for foreign character sets but it is
+ // needed to support naughty browsers such as Konqueror and Safari
+ // which do not honour the charset set in the response
+ response.setContentType("text/plain;charset=utf-8");
+ OutputStream out = response.getOutputStream();
+
+ // Decode using the charset in the request if it exists otherwise
+ // use UTF-8 as this is what all browser implementations use.
+ // The JSON-RPC-Java JavaScript client is ASCII clean so it
+ // although here we can correctly handle data from other clients
+ // that do not escape non ASCII data
+ String charset = request.getCharacterEncoding();
+ if (charset == null) {
+ charset = "UTF-8";
+ }
+ BufferedReader in = new BufferedReader(new InputStreamReader(request.getInputStream(), charset));
+
+ // Read the request
+ CharArrayWriter data = new CharArrayWriter();
+ char buf[] = new char[4096];
+ int ret;
+ while ((ret = in.read(buf, 0, 4096)) != -1) {
+ data.write(buf, 0, ret);
+ }
+
+ JSONObject jsonReq = null;
+ String method = null;
+ try {
+ jsonReq = new JSONObject(data.toString());
+ method = jsonReq.getString("method");
+ } 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 request", e);
+ }
+
+
+ // check if it's a system request
+ // or a method invocation
+ byte[] bout;
+ if (method.startsWith("system.")) {
+ bout = handleJSONRPCSystemInvocation(request, response, data.toString());
+ } else {
+ bout = handleJSONRPCMethodInvocation(request, response, jsonReq);
+ }
+
+ // Send response to client
+ out.write(bout);
+ out.flush();
+ out.close();
+ }
+
+ /**
+ * handles requests for the SMD descriptor for a service
+ */
+ protected void handleSMDRequest(HttpServletRequest request, HttpServletResponse response) throws IOException,
+ UnsupportedEncodingException {
+ String serviceUrl = request.getRequestURL().toString();
+ String smd = JavaToSmd.interfaceToSmd(serviceInterface, serviceUrl);
+
+ response.setContentType("text/plain;charset=utf-8");
+ OutputStream out = response.getOutputStream();
+ byte[] bout = smd.getBytes("UTF-8");
+
+ out.write(bout);
+ out.flush();
+ out.close();
+ }
+
+ protected byte[] handleJSONRPCSystemInvocation(HttpServletRequest request, HttpServletResponse response, String requestData) throws IOException,
+ UnsupportedEncodingException {
+ /*
+ * Create a new bridge for every request to avoid all the problems with
+ * JSON-RPC-Java storing the bridge in the session
+ */
+ HttpSession session = request.getSession();
+
+ JSONRPCBridge jsonrpcBridge = new JSONRPCBridge();
+ jsonrpcBridge.registerObject("Service", serviceInstance, serviceInterface);
+ session.setAttribute("JSONRPCBridge", jsonrpcBridge);
+
+ org.json.JSONObject jsonReq = null;
+ com.metaparadigm.jsonrpc.JSONRPCResult jsonResp = null;
+ /* try {
+ jsonReq = new org.json.JSONObject(requestData);
+ } catch (java.text.ParseException e) {
+ throw new RuntimeException("Unable to parse request", e);
+ }
+
+ String method = jsonReq.getString("method");
+ if ((method != null) && (method.indexOf('.') < 0)) {
+ jsonReq.putOpt("method", "Service" + "." + method);
+ }
+
+ // invoke the request
+ jsonResp = jsonrpcBridge.call(new Object[] {request}, jsonReq);
+
+ return jsonResp.toString().getBytes("UTF-8");*/
+ throw new UnsupportedOperationException("not implemented in Android!");
+ }
+
+ protected byte[] handleJSONRPCMethodInvocation(HttpServletRequest request, HttpServletResponse response, JSONObject jsonReq) throws IOException,
+ UnsupportedEncodingException {
+
+ String method = null;
+ Object[] args = null;
+ Object id = null;
+ try {
+ // Extract the method
+ method = jsonReq.getString("method");
+ if ((method != null) && (method.indexOf('.') < 0)) {
+ jsonReq.putOpt("method", "Service" + "." + method);
+ }
+
+ // Extract the arguments
+ JSONArray array = jsonReq.getJSONArray("params");
+ args = new Object[array.length()];
+ for (int i = 0; i < args.length; i++) {
+ args[i] = array.get(i);
+ }
+ id = jsonReq.get("id");
+
+ } catch (Exception e) {
+ throw new RuntimeException("Unable to find json method name", e);
+ }
+
+ // invoke the request
+ RuntimeWire wire = componentService.getRuntimeWire(binding, serviceContract);
+ Operation jsonOperation = findOperation(method);
+ Object result = null;
+ JSONObject jsonResponse = new JSONObject();
+ try {
+ result = wire.invoke(jsonOperation, args);
+ try {
+ jsonResponse.put("result", result);
+ jsonResponse.putOpt("id", id);
+ } catch (Exception e) {
+ throw new ServiceRuntimeException(e);
+ }
+ } catch (InvocationTargetException e) {
+ try {
+ jsonResponse.put("error", e.getCause());
+ jsonResponse.putOpt("id", id);
+ } catch (Exception e1) {
+ throw new ServiceRuntimeException(e);
+ }
+ } catch(RuntimeException e) {
+ e.printStackTrace();
+ throw e;
+ }
+
+ //get response to send to client
+ return jsonResponse.toString().getBytes("UTF-8");
+ }
+
+ /**
+ * Find the operation from the component service contract
+ * @param componentService
+ * @param method
+ * @return
+ */
+ private Operation findOperation(String method) {
+ if (method.contains(".")) {
+ method = method.substring(method.lastIndexOf(".") + 1);
+ }
+
+ List<Operation> operations = serviceContract.getInterface().getOperations();
+ //componentService.getBindingProvider(binding).getBindingInterfaceContract().getInterface().getOperations();
+
+
+ Operation result = null;
+ for (Operation o : operations) {
+ if (o.getName().equalsIgnoreCase(method)) {
+ result = o;
+ break;
+ }
+ }
+
+ return result;
+ }
+}
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