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/**
*
* Copyright 2005 The Apache Software Foundation
*
* 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.tomcat;
import javax.servlet.Servlet;
import org.apache.catalina.Container;
import org.apache.catalina.Context;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.Wrapper;
import org.apache.catalina.core.StandardContext;
import org.apache.catalina.core.StandardHost;
import org.apache.catalina.util.StringManager;
import org.apache.tomcat.util.buf.MessageBytes;
import org.apache.tomcat.util.http.mapper.MappingData;
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.ConfigurationLoadException;
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.ModuleStart;
import org.apache.tuscany.core.context.event.ModuleStop;
import org.apache.tuscany.core.runtime.RuntimeContext;
import org.apache.tuscany.core.runtime.RuntimeContextImpl;
import org.apache.tuscany.core.webapp.ServletHost;
import org.apache.tuscany.model.assembly.AssemblyContext;
import org.apache.tuscany.model.assembly.AssemblyFactory;
import org.apache.tuscany.model.assembly.ModuleComponent;
import org.apache.tuscany.model.assembly.loader.AssemblyModelLoader;
/**
* A specialied Tomcat Host that extends the Standardhost implementation and adds SCA capabilities.
* <p/>
* As children are added, they are examined for the presence of SCA configuration
* information and if any is found then the web application is treated as an
* SCA Module defintion which is used to create a ModuleComponent. The name of the
* context is used as the name of the ModuleComponent and its context path is used
* as the URI.
*
* @version $Rev$ $Date$
*/
@SuppressWarnings({"serial"})
public class TuscanyHost extends StandardHost implements ServletHost {
private static final String SYSTEM_MODULE_COMPONENT = "org.apache.tuscany.core.system";
private static final StringManager sm = StringManager.getManager("org.apache.tuscany.tomcat");
private RuntimeContext runtime;
private AssemblyModelLoader modelLoader;
private AssemblyFactory modelFactory;
public synchronized void start() throws LifecycleException {
startRuntime();
super.start();
}
public synchronized void stop() throws LifecycleException {
super.stop();
stopRuntime();
}
private void startRuntime() {
// Create an assembly model context
AssemblyContext modelContext = BootstrapHelper.getModelContext(getClass().getClassLoader());
modelFactory = modelContext.getAssemblyFactory();
modelLoader = modelContext.getAssemblyLoader();
// Create and start the runtime
NullMonitorFactory monitorFactory = new NullMonitorFactory();
ContextFactoryBuilderRegistry builderRegistry = BootstrapHelper.bootstrapContextFactoryBuilders(monitorFactory);
runtime = new RuntimeContextImpl(monitorFactory, builderRegistry, new DefaultWireBuilder());
runtime.start();
// Load and start the system configuration
try {
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));
TomcatHost host = systemContext.resolveInstance(TomcatHost.class);
host.setHost(this);
} catch (ConfigurationLoadException e) {
getLogger().warn(sm.getString("runtime.loadSystemFailed", e.getResourceURI()), e);
return;
} catch (Exception e) {
getLogger().warn(sm.getString("runtime.registerSystemFailed"), e);
runtime.stop();
runtime = null;
return;
}
getLogger().info(sm.getString("runtime.started"));
}
private void stopRuntime() {
if (runtime == null) {
return;
}
runtime.getSystemContext().publish(new ModuleStop(this));
runtime.stop();
runtime = null;
getLogger().info(sm.getString("runtime.stopped"));
}
public synchronized void addChild(Container child) {
if (!(child instanceof StandardContext)) {
throw new IllegalArgumentException(sm.getString("tuscanyHost.notContext"));
}
StandardContext ctx = (StandardContext) child;
ctx.addLifecycleListener(new TuscanyContextListener(runtime, modelFactory, modelLoader));
super.addChild(child);
}
public String toString() {
StringBuilder sb = new StringBuilder(132);
if (getParent() != null) {
sb.append(getParent().toString()).append('.');
}
sb.append("TuscanyHost[").append(getName()).append(']');
return (sb.toString());
}
public void registerMapping(String mapping, Servlet servlet) {
Context ctx = map(mapping);
if (ctx == null) {
throw new UnsupportedOperationException("Cannot find context for mapping " + mapping);
}
String contextPath = ctx.getPath();
assert mapping.startsWith(contextPath);
mapping = mapping.substring(contextPath.length());
Wrapper wrapper = new TuscanyWrapper(servlet);
wrapper.setName(mapping.substring(0,mapping.lastIndexOf('/')));
ctx.addChild(wrapper);
wrapper.addMapping(mapping);
ctx.getMapper().addWrapper(mapping, wrapper, false);
}
public void unregisterMapping(String mapping) {
}
public Servlet getMapping(String mapping) {
Context ctx = map(mapping);
if (ctx == null) {
return null;
}
String contextPath = ctx.getPath();
assert mapping.startsWith(contextPath);
MappingData mappingData = new MappingData();
MessageBytes mb = MessageBytes.newInstance();
mb.setString(mapping);
try {
ctx.getMapper().map(mb, mappingData);
} catch (Exception e) {
return null;
}
if (!(mappingData.wrapper instanceof TuscanyWrapper)) {
return null;
}
TuscanyWrapper wrapper = (TuscanyWrapper) mappingData.wrapper;
return wrapper.getServlet();
}
}
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