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Diffstat (limited to 'sca-java-1.x/branches/sca-java-0.91/modules/binding-jsonrpc/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/JSONRPCService.java')
-rw-r--r-- | sca-java-1.x/branches/sca-java-0.91/modules/binding-jsonrpc/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/JSONRPCService.java | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-0.91/modules/binding-jsonrpc/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/JSONRPCService.java b/sca-java-1.x/branches/sca-java-0.91/modules/binding-jsonrpc/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/JSONRPCService.java new file mode 100644 index 0000000000..a7a705d5e5 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-0.91/modules/binding-jsonrpc/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/JSONRPCService.java @@ -0,0 +1,118 @@ +/* + * 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 org.apache.tuscany.sca.assembly.Binding; +import org.apache.tuscany.sca.http.ServletHost; +import org.apache.tuscany.sca.interfacedef.Interface; +import org.apache.tuscany.sca.interfacedef.java.JavaInterface; +import org.apache.tuscany.sca.runtime.RuntimeComponent; +import org.apache.tuscany.sca.runtime.RuntimeComponentService; +import org.apache.tuscany.sca.spi.ComponentLifecycle; + +/** + * Implementation of the JSONRPC binding provider. + * + * There are multiple servlets used to support the JSON-RPC binidng. + * One servlet to handle requests for the scaDomain script and seperate + * servlets for each SCA <service> which uses <binding.jsonrpc>. + */ +public class JSONRPCService implements ComponentLifecycle { + + private RuntimeComponent component; + private RuntimeComponentService service; + private JSONRPCBinding jsonBinding; + private ServletHost servletHost; + private Binding binding; + + public static final String SERVICE_PREFIX = "/SCADomain/"; + + // path to the scaDomain.js script + // Note: this is the same as the Ajax binding to keep the client code + // the same for clients using either the ajax or jsonrpc binding + public static final String SCA_DOMAIN_SCRIPT = SERVICE_PREFIX + "scaDomain.js"; + + + public JSONRPCService(RuntimeComponent component, + RuntimeComponentService service, + Binding b, + JSONRPCBinding binding, + ServletHost servletHost) { + this.component = component; + this.service = service; + this.binding = b; + this.jsonBinding = binding; + this.servletHost = servletHost; + } + + public void start() { + + // Create and register a servlet for this service + Class<?> serviceInterface = getTargetJavaClass(service.getInterfaceContract().getInterface()); + Object instance = component.createSelfReference(serviceInterface).getService(); + JSONRPCServiceServlet serviceServlet = new JSONRPCServiceServlet(binding.getName(), serviceInterface, instance); + if (binding.getURI() != null) { + servletHost.addServletMapping(binding.getURI(), serviceServlet); + } else { + servletHost.addServletMapping(SERVICE_PREFIX + binding.getName(), serviceServlet); + } + + // get the ScaDomainScriptServlet, if it doesn't yet exist create one + // this uses removeServletMapping / addServletMapping as theres no getServletMapping facility + ScaDomainScriptServlet scaDomainServlet = (ScaDomainScriptServlet) servletHost.removeServletMapping(SCA_DOMAIN_SCRIPT); + if (scaDomainServlet == null) { + scaDomainServlet = new ScaDomainScriptServlet(); + } + servletHost.addServletMapping(SCA_DOMAIN_SCRIPT, scaDomainServlet); + + // Add this service to the scadomain script servlet + scaDomainServlet.addService(binding.getName()); + + } + + public void stop() { + + // Unregister from the service servlet mapping + if (binding.getURI() != null) { + servletHost.removeServletMapping(binding.getURI()); + } else { + servletHost.removeServletMapping(SERVICE_PREFIX + binding.getName()); + } + + // Unregister the service from the scaDomain script servlet + // don't unregister the scaDomain script servlet if it still has other service names + ScaDomainScriptServlet scaDomainServlet = (ScaDomainScriptServlet) servletHost.removeServletMapping(SCA_DOMAIN_SCRIPT); + if (scaDomainServlet != null) { + scaDomainServlet.removeService(binding.getName()); + // put it back if there are still other services registered with the servlet + if (scaDomainServlet.getServiceNames().size() > 0) { + servletHost.addServletMapping(SCA_DOMAIN_SCRIPT, scaDomainServlet); + } + } + } + + protected Class<?> getTargetJavaClass(Interface targetInterface) { + // TODO: right now assume that the target is always a Java + // Implementation. Need to figure out how to generate Java + // Interface in cases where the target is not a Java Implementation + return ((JavaInterface)targetInterface).getJavaClass(); + } + +} |