diff options
Diffstat (limited to 'sca-java-1.x/tags/java-M1-20060522/java/sca/core/src/main/java/org/apache/tuscany/core/webapp/TuscanyServletListener.java')
-rw-r--r-- | sca-java-1.x/tags/java-M1-20060522/java/sca/core/src/main/java/org/apache/tuscany/core/webapp/TuscanyServletListener.java | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/java-M1-20060522/java/sca/core/src/main/java/org/apache/tuscany/core/webapp/TuscanyServletListener.java b/sca-java-1.x/tags/java-M1-20060522/java/sca/core/src/main/java/org/apache/tuscany/core/webapp/TuscanyServletListener.java new file mode 100644 index 0000000000..8c9c215d64 --- /dev/null +++ b/sca-java-1.x/tags/java-M1-20060522/java/sca/core/src/main/java/org/apache/tuscany/core/webapp/TuscanyServletListener.java @@ -0,0 +1,129 @@ +/** + * + * Copyright 2005 The Apache Software Foundation or its licensors, as applicable. + * + * Licensed 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.core.webapp; + +import org.apache.tuscany.common.monitor.MonitorFactory; +import org.apache.tuscany.common.monitor.impl.NullMonitorFactory; +import org.apache.tuscany.core.builder.ContextFactoryBuilderRegistry; +import org.apache.tuscany.core.builder.impl.DefaultWireBuilder; +import org.apache.tuscany.core.client.BootstrapHelper; +import org.apache.tuscany.core.config.ConfigurationException; +import org.apache.tuscany.core.config.ModuleComponentConfigurationLoader; +import org.apache.tuscany.core.context.CompositeContext; +import org.apache.tuscany.core.context.SystemCompositeContext; +import org.apache.tuscany.core.context.event.ModuleStop; +import org.apache.tuscany.core.context.event.ModuleStart; +import org.apache.tuscany.core.context.event.HttpSessionEnd; +import org.apache.tuscany.core.runtime.RuntimeContext; +import org.apache.tuscany.core.runtime.RuntimeContextImpl; +import org.apache.tuscany.model.assembly.AssemblyContext; +import org.apache.tuscany.model.assembly.ModuleComponent; +import org.osoa.sca.CurrentModuleContext; +import org.osoa.sca.ModuleContext; + +import javax.servlet.ServletContext; +import javax.servlet.ServletContextEvent; +import javax.servlet.ServletContextListener; +import javax.servlet.http.HttpSessionEvent; +import javax.servlet.http.HttpSessionListener; + +/** + * ServletContextListener that can be added to a standard web application to boot + * a Tuscany runtime inside that application. All implementation classes should + * be located in the web application itself. + * + * @version $Rev: 380792 $ $Date: 2006-02-24 11:25:11 -0800 (Fri, 24 Feb 2006) $ + */ +public class TuscanyServletListener implements ServletContextListener, HttpSessionListener { + public static final String SCA_COMPONENT_NAME = "org.apache.tuscany.core.webapp.ModuleComponentName"; + public static final String MODULE_COMPONENT_NAME = "org.apache.tuscany.core.webapp.ModuleComponentContext"; + public static final String TUSCANY_RUNTIME_NAME = RuntimeContext.class.getName(); + + private RuntimeContext runtime; + private CompositeContext moduleContext; + + private static final String SYSTEM_MODULE_COMPONENT = "org.apache.tuscany.core.system"; + + public void contextInitialized(ServletContextEvent servletContextEvent) { + ServletContext servletContext = servletContextEvent.getServletContext(); + String name = servletContext.getInitParameter(SCA_COMPONENT_NAME); + String uri = name; // todo get from context path + MonitorFactory monitorFactory = new NullMonitorFactory(); // todo have one that writes to the servlet log + + try { + bootRuntime(name, uri, monitorFactory); + } catch (ConfigurationException e) { + throw new RuntimeException(e.getMessage(), e); + } + + servletContext.setAttribute(TUSCANY_RUNTIME_NAME, runtime); + servletContext.setAttribute(MODULE_COMPONENT_NAME, moduleContext); + } + + public void contextDestroyed(ServletContextEvent servletContextEvent) { + moduleContext.publish(new ModuleStop(this)); + moduleContext.stop(); + SystemCompositeContext systemContext = runtime.getSystemContext(); + systemContext.publish(new ModuleStop(this)); + systemContext.stop(); + runtime.stop(); + servletContextEvent.getServletContext().removeAttribute(MODULE_COMPONENT_NAME); + servletContextEvent.getServletContext().removeAttribute(TUSCANY_RUNTIME_NAME); + } + + public void sessionCreated(HttpSessionEvent event) { + // do nothing since sessions are lazily created in {@link TuscanyRequestFilter} + } + + public void sessionDestroyed(HttpSessionEvent event) { + // todo do we actually need to bind the module context to the thread to fire this event? + ModuleContext oldContext = CurrentModuleContext.getContext(); + try { + ContextBinder.BINDER.setContext((ModuleContext) moduleContext); + moduleContext.publish(new HttpSessionEnd(this, event.getSession())); + } finally{ + ContextBinder.BINDER.setContext(oldContext); + } + } + + private void bootRuntime(String name, String uri, MonitorFactory monitorFactory) throws ConfigurationException { + + // Create an assembly model context + ClassLoader classLoader = Thread.currentThread().getContextClassLoader(); + AssemblyContext modelContext = BootstrapHelper.getModelContext(classLoader); + + // Create a runtime context and start it + ContextFactoryBuilderRegistry builderRegistry = BootstrapHelper.bootstrapContextFactoryBuilders(monitorFactory); + runtime = new RuntimeContextImpl(monitorFactory, builderRegistry, new DefaultWireBuilder()); + runtime.start(); + + // Load and start the system configuration + SystemCompositeContext systemContext = runtime.getSystemContext(); + BootstrapHelper.bootstrapStaxLoader(systemContext, modelContext); + ModuleComponentConfigurationLoader loader = BootstrapHelper.getConfigurationLoader(systemContext, modelContext); + ModuleComponent systemModuleComponent = loader.loadSystemModuleComponent(SYSTEM_MODULE_COMPONENT, SYSTEM_MODULE_COMPONENT); + CompositeContext context = BootstrapHelper.registerModule(systemContext, systemModuleComponent); + context.publish(new ModuleStart(this)); + + // Load the SCDL configuration of the application module + CompositeContext rootContext = runtime.getRootContext(); + ModuleComponent moduleComponent = loader.loadModuleComponent(name, uri); + moduleContext = BootstrapHelper.registerModule(rootContext, moduleComponent); + + moduleContext.publish(new ModuleStart(this)); + } +} |