diff options
Diffstat (limited to 'sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding')
6 files changed, 575 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding/dwr/DWRBinding.java b/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding/dwr/DWRBinding.java new file mode 100644 index 0000000000..ae5cf327ab --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding/dwr/DWRBinding.java @@ -0,0 +1,31 @@ +/* + * 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.dwr; + +/** + * The runtime representation of the <binding.dwr> SCDL + * + * @version $Rev$ $Date$ + */ +public class DWRBinding { + + // Empty as <binding.dwr> doesn't use any additional attributes or elements (yet). + +} diff --git a/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding/dwr/DWRBindingActivator.java b/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding/dwr/DWRBindingActivator.java new file mode 100644 index 0000000000..d14751f235 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding/dwr/DWRBindingActivator.java @@ -0,0 +1,56 @@ +/* + * 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.dwr; + +import org.apache.tuscany.sca.assembly.Binding; +import org.apache.tuscany.sca.extension.helper.BindingActivator; +import org.apache.tuscany.sca.extension.helper.ComponentLifecycle; +import org.apache.tuscany.sca.extension.helper.InvokerFactory; +import org.apache.tuscany.sca.host.http.ServletHost; +import org.apache.tuscany.sca.runtime.RuntimeComponent; +import org.apache.tuscany.sca.runtime.RuntimeComponentReference; +import org.apache.tuscany.sca.runtime.RuntimeComponentService; + +/** + * The Binding Activator for the DWR Binding. + * + * @version $Rev$ $Date$ + */ +public class DWRBindingActivator implements BindingActivator<DWRBinding>{ + + private ServletHost servletHost; + + public DWRBindingActivator(ServletHost servletHost) { + this.servletHost = servletHost; + } + + public Class<DWRBinding> getBindingClass() { + return DWRBinding.class; + } + + public InvokerFactory createInvokerFactory(RuntimeComponent rc, RuntimeComponentReference rcr, Binding b, DWRBinding ab) { + return new DWRInvokerFactory(rc, rcr, b, ab, servletHost); + } + + public ComponentLifecycle createService(RuntimeComponent rc, RuntimeComponentService rcs, Binding b, DWRBinding ab) { + return new DWRService(rc, rcs, b, ab, servletHost); + } + +} diff --git a/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding/dwr/DWRInvoker.java b/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding/dwr/DWRInvoker.java new file mode 100644 index 0000000000..24e6dbbcd4 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding/dwr/DWRInvoker.java @@ -0,0 +1,93 @@ +/* + * 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.dwr; + +import java.util.Collection; + +import org.apache.tuscany.sca.core.invocation.MessageImpl; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.invocation.Invoker; +import org.apache.tuscany.sca.invocation.Message; +import org.directwebremoting.ScriptBuffer; +import org.directwebremoting.WebContext; +import org.directwebremoting.WebContextFactory; +import org.directwebremoting.proxy.dwr.Util; + +/** + * The invoker for a DWR Binding. + * + * @version $Rev$ $Date$ + */ +public class DWRInvoker implements Invoker { + + private String referenceFunction; + + public DWRInvoker(String referenceName, Operation operation) { + this.referenceFunction = referenceName + "." + operation.getName(); + } + + public Message invoke(Message requestMsg) { + + invoke((Object[])requestMsg.getBody()); + + // DWR references can not return anything + return new MessageImpl(); + } + + public void invoke(Object[] args) { + + // TODO: this only works if its the same thread as request + WebContext wctx = WebContextFactory.get(); + String currentPage = wctx.getCurrentPage(); + + // Get a DWR Util proxy for all the browsers on the current page: + Collection sessions = wctx.getScriptSessionsByPage(currentPage); + Util utilAll = new Util(sessions); + + ScriptBuffer referenceInvoke = getInvokeFragment(args, wctx); + + // add the reference call to the Util proxy which will cause DWR to + // asynchronously send it to be run on each active browser client + utilAll.addScript(referenceInvoke); + } + + /** + * Creates a fragment of JavaScript code to invoke the reference function + * Eg: "<referenceName>.<operationName>(arg1, arg2,...);" + */ + protected ScriptBuffer getInvokeFragment(Object[] args, WebContext wctx) { + + ScriptBuffer sb = new ScriptBuffer(); + sb.appendScript(referenceFunction); + sb.appendScript("("); + if (args != null) { + for (int i = 0; i < args.length; i++) { + sb.appendData(args[i]); + if (i < (args.length - 1)) { + sb.appendScript(", "); + } + } + } + sb.appendScript(");"); + + return sb; + } + +} diff --git a/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding/dwr/DWRInvokerFactory.java b/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding/dwr/DWRInvokerFactory.java new file mode 100644 index 0000000000..1d073c9ecf --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding/dwr/DWRInvokerFactory.java @@ -0,0 +1,67 @@ +/* + * 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.dwr; + +import static org.apache.tuscany.sca.binding.dwr.DWRService.SERVLET_PATH; + +import org.apache.tuscany.sca.assembly.Binding; +import org.apache.tuscany.sca.extension.helper.ComponentLifecycle; +import org.apache.tuscany.sca.extension.helper.InvokerFactory; +import org.apache.tuscany.sca.host.http.ServletHost; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.invocation.Invoker; +import org.apache.tuscany.sca.runtime.RuntimeComponent; +import org.apache.tuscany.sca.runtime.RuntimeComponentReference; + +/** + * InvokerFactory for the DWRBinding. + * + * @version $Rev$ $Date$ + */ +public class DWRInvokerFactory implements InvokerFactory, ComponentLifecycle { + + private Binding binding; + private ServletHost servletHost; + + public DWRInvokerFactory(RuntimeComponent rc, RuntimeComponentReference rcr, Binding b, DWRBinding ab, ServletHost servletHost) { + this.binding = b; + this.servletHost = servletHost; + } + + public Invoker createInvoker(Operation operation) { + return new DWRInvoker(binding.getName(), operation); + } + + public void start() { + + DWRServlet servlet = (DWRServlet) servletHost.getServletMapping(SERVLET_PATH); + if (servlet == null) { + servlet = new DWRServlet(); + servletHost.addServletMapping(SERVLET_PATH, servlet); + } + + servlet.addReference(binding.getName()); + } + + public void stop() { + servletHost.removeServletMapping(SERVLET_PATH); + } + +} diff --git a/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding/dwr/DWRService.java b/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding/dwr/DWRService.java new file mode 100644 index 0000000000..7d5a7f1677 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding/dwr/DWRService.java @@ -0,0 +1,81 @@ +/* + * 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.dwr; + +import java.lang.reflect.InvocationHandler; +import java.lang.reflect.Method; +import java.lang.reflect.Proxy; + +import org.apache.tuscany.sca.assembly.Binding; +import org.apache.tuscany.sca.extension.helper.ComponentLifecycle; +import org.apache.tuscany.sca.host.http.ServletHost; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.interfacedef.java.JavaInterface; +import org.apache.tuscany.sca.interfacedef.java.impl.JavaInterfaceUtil; +import org.apache.tuscany.sca.runtime.RuntimeComponent; +import org.apache.tuscany.sca.runtime.RuntimeComponentService; +import org.apache.tuscany.sca.runtime.RuntimeWire; + +/** + * DWR Service. + * + * @version $Rev$ $Date$ + */ +public class DWRService implements ComponentLifecycle { + + private RuntimeComponent rc; + private RuntimeComponentService rcs; + private Binding binding; + private ServletHost servletHost; + + static final String SERVLET_PATH = "/SCADomain/*"; + + public DWRService(RuntimeComponent rc, RuntimeComponentService rcs, Binding binding, DWRBinding ab, ServletHost servletHost) { + this.rc = rc; + this.rcs = rcs; + this.binding = binding; + this.servletHost = servletHost; + } + + public void start() { + + DWRServlet servlet = (DWRServlet) servletHost.getServletMapping(SERVLET_PATH); + if (servlet == null) { + servlet = new DWRServlet(); + servletHost.addServletMapping(SERVLET_PATH, servlet); + } + + // Create a Java proxy to the target service + Class<?> type = ((JavaInterface)rcs.getInterfaceContract().getInterface()).getJavaClass(); + Object proxy = Proxy.newProxyInstance(type.getClassLoader(), new Class[]{type}, new InvocationHandler() { + public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { + RuntimeWire wire = rcs.getRuntimeWire(binding); + Operation op = JavaInterfaceUtil.findOperation(method, rcs.getInterfaceContract().getInterface().getOperations()); + return wire.invoke(op, args); + }}); + + servlet.addService(binding.getName(), type, proxy); + } + + public void stop() { + servletHost.removeServletMapping(SERVLET_PATH); + } + +} diff --git a/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding/dwr/DWRServlet.java b/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding/dwr/DWRServlet.java new file mode 100644 index 0000000000..3a2471d8f3 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-dwr/src/main/java/org/apache/tuscany/sca/binding/dwr/DWRServlet.java @@ -0,0 +1,247 @@ +/* + * 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.dwr; + +import java.io.IOException; +import java.io.PrintWriter; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collection; +import java.util.Collections; +import java.util.Enumeration; +import java.util.HashMap; +import java.util.List; +import java.util.Map; + +import javax.servlet.ServletConfig; +import javax.servlet.ServletContext; +import javax.servlet.ServletException; +import javax.servlet.ServletRequest; +import javax.servlet.ServletResponse; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; + +import org.directwebremoting.Container; +import org.directwebremoting.create.AbstractCreator; +import org.directwebremoting.extend.CreatorManager; +import org.directwebremoting.extend.Handler; +import org.directwebremoting.extend.Remoter; +import org.directwebremoting.servlet.DwrServlet; +import org.directwebremoting.servlet.EngineHandler; +import org.directwebremoting.servlet.PathConstants; +import org.directwebremoting.servlet.UrlProcessor; + +/** + * Tuscany customized DWR Servlet to implement support for the DWR binding + * + * Handles requests for SCA services and references that use <binding.dwr>, + * and also the HTTP GET for the Tuscany DWR system script "scaDomain.js" + * + * @version $Rev$ $Date$ + */ +public class DWRServlet extends DwrServlet { + private static final long serialVersionUID = 1L; + + private transient Map<String, ServiceHolder> services; + private transient List<String> referenceNames; + private transient boolean initialized; + private transient Map<String, String> initParams; + + private static final String SCADOMAIN_SCRIPT_PATH = "/scaDomain.js"; + + public DWRServlet() { + this.services = new HashMap<String, ServiceHolder>(); + this.referenceNames = new ArrayList<String>(); + + this.initParams = new HashMap<String, String>(); + // maybe use <binding.dwr> attributes to define the init params + initParams.put("activeReverseAjaxEnabled", "true"); + } + + @Override + public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException { + super.service(req, res); + } + + /** + * Initialize the Servlet + * There is a single instance of this Servlet which is registered + * for multiple path mappings, but the init should only run once. + */ + @Override + public void init(ServletConfig servletConfig) throws ServletException { + if (!initialized) { + super.init(patchConfig(servletConfig)); + addScriptHandler(); + initServices(); + initialized = true; + } + } + + /** + * Add in the handler to process the HTTP get for /sca/scaDomain.js + * + * This wrappers the DWR Engine handler which returns the DWR engine.js script, + * this wrappers that handler so as to add Tuscany specific header and footer code + * to the DWR engine.js to define the Tuscany SCADomain control functions and + * functions for each SCA service and reference that use <binding.dwr>. + */ + private void addScriptHandler() { + + UrlProcessor urlProcessor = (UrlProcessor)getContainer().getBean(UrlProcessor.class.getName()); + + final EngineHandler engineHandler = + (EngineHandler)getContainer().getBean(PathConstants.URL_PREFIX + "/engine.js"); + + final Handler scaDomainScriptHandler = new Handler() { + public void handle(HttpServletRequest request, HttpServletResponse response) throws IOException { + PrintWriter out = response.getWriter(); + out.println("/** Apache Tuscany scaDomain.js Header */"); + + engineHandler.handle(request, response); + + tuscanyFooter(request, out); + } + + }; + + // add the scaDomainScriptHandler to the urlProcessor + // bit of a hack, there's probably cleaner way to get it registered + urlProcessor.afterContainerSetup(new Container() { + public Object getBean(String name) { + return scaDomainScriptHandler; + } + public Collection getBeanNames() { + return Arrays.asList(new String[] {PathConstants.URL_PREFIX + SCADOMAIN_SCRIPT_PATH}); + } + }); + } + + /** + * Adds the JavaScript defining SCADomain, its control functions, + * and functions for all the available SCA services and references. + */ + private void tuscanyFooter(HttpServletRequest request, PrintWriter out) { + out.println("/** Apache Tuscany scaDomain.js Footer */"); + out.println(); + out.println("function scaDomain() { }"); + out.println(); + out.println("// SCA services"); + + // Use the DWR remoter to generate the JavaScipt function for each SCA service + Remoter remoter = (Remoter)getContainer().getBean(Remoter.class.getName()); + + String path = request.getContextPath() + request.getServletPath(); + + for (String serviceName : services.keySet()) { + String serviceScript = remoter.generateInterfaceScript(serviceName, path); + out.println(serviceScript); + } + + if (referenceNames.size() > 0) { + + out.println("// SCA reverse ajax control functions"); + out.println(); + out.println("scaDomain.open = function() { dwr.engine.setActiveReverseAjax(true); };"); + out.println("scaDomain.close = function() { dwr.engine.setActiveReverseAjax(false); };"); + + out.println(); + out.println("// SCA references"); + out.println(); + + // the JavaScript function for SCA references has an + // empty impl as it uses DWR severside "push" + for (String referenceName : referenceNames) { + out.println("function " + referenceName + "() { }"); + } + } + + out.println(); + out.println("/** End of Apache Tuscany scaDomain.js */"); + out.println(); + } + + /** + * Add an SCA reference to be added to the DWR runtime + */ + public void addReference(String name) { + referenceNames.add(name); + } + + /** + * Add an SCA service to be added to the DWR runtime + */ + public void addService(String name, final Class type, final Object instance) { + ServiceHolder holder = new ServiceHolder(); + holder.name = name; + holder.type = type; + holder.instance = instance; + services.put(name, holder); + } + + /** + * Defines each SCA service proxy instance to DWR + */ + private void initServices() { + CreatorManager creatorManager = (CreatorManager)getContainer().getBean(CreatorManager.class.getName()); + + for (final ServiceHolder holder : services.values()) { + creatorManager.addCreator(holder.name, new AbstractCreator() { + public Class getType() { + return holder.type; + } + + public Object getInstance() throws InstantiationException { + return holder.instance; + } + }); + } + } + + // utility class to aid passing around services + private class ServiceHolder { + String name; + Class type; + Object instance; + } + + /** + * Patch the ServletConfig to enable setting init params for DWR + * and so DWR can't see the Tuscany servlet's init params. + */ + private ServletConfig patchConfig(final ServletConfig servletConfig) { + ServletConfig patchedContext = new ServletConfig() { + public String getInitParameter(String name) { + return initParams.get(name); + } + public Enumeration getInitParameterNames() { + return Collections.enumeration(initParams.keySet()); + } + public ServletContext getServletContext() { + return servletConfig.getServletContext(); + } + public String getServletName() { + return servletConfig.getServletName(); + } + }; + return patchedContext; + } + +} |