diff options
Diffstat (limited to 'sca-java-1.x/tags/1.5.1-RC2/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/ScaDomainScriptServlet.java')
-rw-r--r-- | sca-java-1.x/tags/1.5.1-RC2/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/ScaDomainScriptServlet.java | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/1.5.1-RC2/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/ScaDomainScriptServlet.java b/sca-java-1.x/tags/1.5.1-RC2/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/ScaDomainScriptServlet.java new file mode 100644 index 0000000000..999588abf1 --- /dev/null +++ b/sca-java-1.x/tags/1.5.1-RC2/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/ScaDomainScriptServlet.java @@ -0,0 +1,114 @@ +/* + * 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 java.io.IOException; +import java.io.InputStream; +import java.net.URL; +import java.util.ArrayList; +import java.util.List; + +import javax.servlet.ServletOutputStream; +import javax.servlet.http.HttpServlet; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; + +/** + * Servlet to handle requests for the scaDomain.js script. + * + * This script wrappers the JSON-RPC-Java jsonrpc.js script + * adding in at the bottom the JavaScript to create and initialize + * the variables representing the SCA services. + * + * @version $Rev$ $Date$ + */ +public class ScaDomainScriptServlet extends HttpServlet { + private static final long serialVersionUID = 1L; + + protected transient List<String> serviceNames; + + public ScaDomainScriptServlet() { + serviceNames = new ArrayList<String>(); + } + + @Override + public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException { + + ServletOutputStream os = response.getOutputStream(); + + os.println(); + os.println("/* Apache Tuscany scaDomain.js Header */"); + os.println(); + + writeJSONRPCJavaScript(os); + writeScaDomainCode(os, request.getServletPath()); + } + + /** + * Creates a JavaScript variable within the scaDomain script for each SCA service and + * initializes its value with the JSON-RPC client to invoke the serverside service. + */ + protected void writeScaDomainCode(ServletOutputStream out, String path) throws IOException { + out.println(); + out.println("/* Apache Tuscany scaDomain.js Footer */"); + out.println(); + out.println("function scaDomain() {}"); + + // remove the leading slash '/' character + path = path.substring(1); + + for (String serviceName : serviceNames) { + out.println(); + + // A slight hack to make the service function available with a variable named 'serviceName' + // to do that the JSONRpcClient is added to the scaDomain and then the service function is got from that + out.println("scaDomain." + serviceName + " = " + "new JSONRpcClient(\"" + serviceName + "\");"); + out.println(serviceName + " = scaDomain." + serviceName + ".Service;"); + } + + out.println(); + out.println("/** End of Apache Tuscany scaDomain.js */"); + out.println(); + } + + /** + * Reads the jsonrpc.js script from the classpath and adds its contents to the output stream. + */ + protected void writeJSONRPCJavaScript(ServletOutputStream os) throws IOException { + URL url = getClass().getResource("jsonrpc.js"); + InputStream is = url.openStream(); + int i; + while ((i = is.read()) != -1) { + os.write(i); + } + } + + public void addService(String serviceName) { + serviceNames.add(serviceName); + } + + public void removeService(String serviceName) { + serviceNames.remove(serviceName); + } + + public List<String> getServiceNames() { + return serviceNames; + } + +} |