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/*
* 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.host.embedded.impl;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import org.apache.tuscany.sca.assembly.AssemblyFactory;
import org.apache.tuscany.sca.assembly.SCABindingFactory;
import org.apache.tuscany.sca.assembly.builder.CompositeBuilder;
import org.apache.tuscany.sca.context.ContextFactoryExtensionPoint;
import org.apache.tuscany.sca.context.DefaultContextFactoryExtensionPoint;
import org.apache.tuscany.sca.contribution.ContributionFactory;
import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
import org.apache.tuscany.sca.contribution.service.ContributionReadException;
import org.apache.tuscany.sca.contribution.service.ContributionResolveException;
import org.apache.tuscany.sca.contribution.service.ContributionService;
import org.apache.tuscany.sca.contribution.util.ServiceConfigurationUtil;
import org.apache.tuscany.sca.core.DefaultExtensionPointRegistry;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.ModuleActivator;
import org.apache.tuscany.sca.core.assembly.ActivationException;
import org.apache.tuscany.sca.core.assembly.CompositeActivator;
import org.apache.tuscany.sca.core.assembly.RuntimeAssemblyFactory;
import org.apache.tuscany.sca.core.invocation.MessageFactoryImpl;
import org.apache.tuscany.sca.core.invocation.ProxyFactory;
import org.apache.tuscany.sca.core.scope.ScopeRegistry;
import org.apache.tuscany.sca.interfacedef.InterfaceContractMapper;
import org.apache.tuscany.sca.interfacedef.impl.InterfaceContractMapperImpl;
import org.apache.tuscany.sca.invocation.MessageFactory;
import org.apache.tuscany.sca.policy.DefaultPolicyFactory;
import org.apache.tuscany.sca.policy.PolicyFactory;
import org.apache.tuscany.sca.policy.SCADefinitions;
import org.apache.tuscany.sca.policy.xml.SCADefinitionsDocumentProcessor;
import org.apache.tuscany.sca.work.WorkScheduler;
public class ReallySmallRuntime {
private List<ModuleActivator> modules;
private ExtensionPointRegistry registry;
private ClassLoader classLoader;
private AssemblyFactory assemblyFactory;
private ContributionService contributionService;
private CompositeActivator compositeActivator;
private CompositeBuilder compositeBuilder;
private WorkScheduler workScheduler;
private ScopeRegistry scopeRegistry;
private ProxyFactory proxyFactory;
public ReallySmallRuntime(ClassLoader classLoader) {
this.classLoader = classLoader;
}
public void start() throws ActivationException {
// Create our extension point registry
registry = new DefaultExtensionPointRegistry();
// Get work scheduler
workScheduler = registry.getExtensionPoint(WorkScheduler.class);
// Create an interface contract mapper
InterfaceContractMapper mapper = new InterfaceContractMapperImpl();
// Get factory extension point
ModelFactoryExtensionPoint factories = registry.getExtensionPoint(ModelFactoryExtensionPoint.class);
// Create context factory extension point
ContextFactoryExtensionPoint contextFactories = new DefaultContextFactoryExtensionPoint();
registry.addExtensionPoint(contextFactories);
// Create Message factory
MessageFactory messageFactory = new MessageFactoryImpl();
factories.addFactory(messageFactory);
// Create a proxy factory
proxyFactory = ReallySmallRuntimeBuilder.createProxyFactory(registry, mapper, messageFactory);
// Create model factories
assemblyFactory = new RuntimeAssemblyFactory(mapper, proxyFactory);
factories.addFactory(assemblyFactory);
PolicyFactory policyFactory = new DefaultPolicyFactory();
factories.addFactory(policyFactory);
SCABindingFactory scaBindingFactory = factories.getFactory(SCABindingFactory.class);
factories.addFactory(scaBindingFactory);
ContributionFactory contributionFactory = factories.getFactory(ContributionFactory.class);
SCADefinitionsDocumentProcessor scaDocDefnProcessor =
ReallySmallRuntimeBuilder.createSCADefinitionsDocProcessor(registry, policyFactory);
// Create a contribution service
contributionService = ReallySmallRuntimeBuilder.createContributionService(classLoader,
registry,
contributionFactory,
assemblyFactory,
policyFactory,
mapper,
scaDocDefnProcessor.getDomainModelResolver());
// Create the ScopeRegistry
scopeRegistry = ReallySmallRuntimeBuilder.createScopeRegistry(registry);
// Create a composite builder
compositeBuilder = ReallySmallRuntimeBuilder.createCompositeBuilder(assemblyFactory,
scaBindingFactory,
mapper);
// Create a composite activator
compositeActivator = ReallySmallRuntimeBuilder.createCompositeActivator(registry,
assemblyFactory,
scaBindingFactory,
mapper,
proxyFactory,
scopeRegistry,
workScheduler);
// Load the runtime modules
modules = loadModules(registry, classLoader);
// Start the runtime modules
startModules(registry, modules);
loadDomainDefinitions(scaDocDefnProcessor);
}
private void loadDomainDefinitions(SCADefinitionsDocumentProcessor scaDocDefnProcessor) throws ActivationException {
URL url = this.classLoader.getResource("definitions.xml");
if ( url != null ) {
try {
SCADefinitions scaDefinitions = scaDocDefnProcessor.read(null, null, url);
scaDocDefnProcessor.resolve(scaDefinitions, scaDocDefnProcessor.getDomainModelResolver());
} catch ( ContributionReadException e ) {
throw new ActivationException(e);
} catch ( ContributionResolveException e ) {
throw new ActivationException(e);
}
}
}
public void stop() throws ActivationException {
// Stop the runtime modules
stopModules(registry, modules);
// Stop and destroy the work manager
workScheduler.destroy();
// Cleanup
modules = null;
registry = null;
assemblyFactory = null;
contributionService = null;
compositeActivator = null;
workScheduler = null;
scopeRegistry = null;
}
public ContributionService getContributionService() {
return contributionService;
}
public CompositeActivator getCompositeActivator() {
return compositeActivator;
}
public CompositeBuilder getCompositeBuilder() {
return compositeBuilder;
}
public AssemblyFactory getAssemblyFactory() {
return assemblyFactory;
}
@SuppressWarnings("unchecked")
private List<ModuleActivator> loadModules(ExtensionPointRegistry registry, ClassLoader classLoader) throws ActivationException {
// Load and instantiate the modules found on the classpath
modules = new ArrayList<ModuleActivator>();
try {
List<String> classNames = ServiceConfigurationUtil.getServiceClassNames(classLoader, ModuleActivator.class.getName());
for (String className : classNames) {
Class moduleClass = Class.forName(className, true, classLoader);
ModuleActivator module = (ModuleActivator)moduleClass.newInstance();
modules.add(module);
}
} catch (IOException e) {
throw new ActivationException(e);
} catch (ClassNotFoundException e) {
throw new ActivationException(e);
} catch (InstantiationException e) {
throw new ActivationException(e);
} catch (IllegalAccessException e) {
throw new ActivationException(e);
}
return modules;
}
private void startModules(ExtensionPointRegistry registry, List<ModuleActivator> modules) throws ActivationException {
// Start all the extension modules
for (ModuleActivator activator : modules) {
activator.start(registry);
}
}
private void stopModules(ExtensionPointRegistry registry, List<ModuleActivator> modules) {
for (ModuleActivator module : modules) {
module.stop(registry);
}
}
/**
* @return the proxyFactory
*/
public ProxyFactory getProxyFactory() {
return proxyFactory;
}
}
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