/*
* 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.servicemix.sca.tuscany;
import java.util.ArrayList;
import java.util.List;
import javax.xml.stream.XMLInputFactory;
import org.apache.tuscany.common.resource.ResourceLoader;
import org.apache.tuscany.common.resource.impl.ResourceLoaderImpl;
import org.apache.tuscany.core.builder.ContextFactoryBuilder;
import org.apache.tuscany.core.config.ConfigurationException;
import org.apache.tuscany.core.config.ModuleComponentConfigurationLoader;
import org.apache.tuscany.core.config.impl.ModuleComponentConfigurationLoaderImpl;
import org.apache.tuscany.core.config.impl.StAXModuleComponentConfigurationLoaderImpl;
import org.apache.tuscany.core.context.AggregateContext;
import org.apache.tuscany.core.context.EventContext;
import org.apache.tuscany.core.context.SystemAggregateContext;
import org.apache.tuscany.core.loader.StAXLoaderRegistry;
import org.apache.tuscany.core.loader.StAXUtil;
import org.apache.tuscany.core.system.assembly.impl.SystemAssemblyFactoryImpl;
import org.apache.tuscany.core.system.builder.SystemContextFactoryBuilder;
import org.apache.tuscany.core.system.builder.SystemEntryPointBuilder;
import org.apache.tuscany.core.system.builder.SystemExternalServiceBuilder;
import org.apache.tuscany.core.system.loader.SystemSCDLModelLoader;
import org.apache.tuscany.model.assembly.AssemblyFactory;
import org.apache.tuscany.model.assembly.AssemblyModelContext;
import org.apache.tuscany.model.assembly.ModuleComponent;
import org.apache.tuscany.model.assembly.impl.AssemblyModelContextImpl;
import org.apache.tuscany.model.assembly.loader.AssemblyModelLoader;
import org.apache.tuscany.model.scdl.loader.SCDLModelLoader;
import org.apache.tuscany.model.scdl.loader.impl.SCDLAssemblyModelLoaderImpl;
public class BootstrapHelper {
/**
* Returns a default AssemblyModelContext.
*
* @param classLoader the classloader to use for application artifacts
* @return a default AssemblyModelContext
*/
public static AssemblyModelContext getModelContext(ClassLoader classLoader) {
// Create an assembly model factory
AssemblyFactory modelFactory = new SystemAssemblyFactoryImpl();
// Create a default assembly model loader
List<SCDLModelLoader> scdlLoaders = new ArrayList<SCDLModelLoader>();
scdlLoaders.add(new SystemSCDLModelLoader());
AssemblyModelLoader modelLoader = new SCDLAssemblyModelLoaderImpl(scdlLoaders);
// Create a resource loader from the supplied classloader
ResourceLoader resourceLoader = new ResourceLoaderImpl(classLoader);
// Create an assembly model context
return new AssemblyModelContextImpl(modelFactory, modelLoader, resourceLoader);
}
/**
* Returns a default list of configuration builders.
*
* @return a default list of configuration builders
*/
public static List<ContextFactoryBuilder> getBuilders() {
List<ContextFactoryBuilder> configBuilders = new ArrayList<ContextFactoryBuilder>();
configBuilders.add((new SystemContextFactoryBuilder()));
configBuilders.add(new SystemEntryPointBuilder());
configBuilders.add(new SystemExternalServiceBuilder());
return configBuilders;
}
private static final boolean useStax = true;
private static final String SYSTEM_LOADER_COMPONENT = "tuscany.loader";
/**
* Returns the default module configuration loader.
*
* @param systemContext the runtime's system context
* @param modelContext the model context the loader will use
* @return the default module configuration loader
*/
public static ModuleComponentConfigurationLoader getConfigurationLoader(SystemAggregateContext systemContext, AssemblyModelContext modelContext) throws ConfigurationException {
if (useStax) {
// Bootstrap the StAX loader module
bootstrapStaxLoader(systemContext, modelContext);
return new StAXModuleComponentConfigurationLoaderImpl(modelContext, XMLInputFactory.newInstance(), systemContext.resolveInstance(StAXLoaderRegistry.class));
} else {
return new ModuleComponentConfigurationLoaderImpl(modelContext);
}
}
private static AggregateContext bootstrapStaxLoader(SystemAggregateContext systemContext, AssemblyModelContext modelContext) throws ConfigurationException {
AggregateContext loaderContext = (AggregateContext) systemContext.getContext(SYSTEM_LOADER_COMPONENT);
if (loaderContext == null) {
ModuleComponent loaderComponent = StAXUtil.bootstrapLoader(SYSTEM_LOADER_COMPONENT, modelContext);
loaderContext = registerModule(systemContext, loaderComponent);
loaderContext.fireEvent(EventContext.MODULE_START, null);
}
return loaderContext;
}
public static AggregateContext registerModule(AggregateContext parent, ModuleComponent component) throws ConfigurationException {
// register the component
parent.registerModelObject(component);
// Get the aggregate context representing the component
return (AggregateContext) parent.getContext(component.getName());
}
}