/*
* 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.extension.helper.impl;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.xml.namespace.QName;
import org.apache.tuscany.sca.assembly.AssemblyFactory;
import org.apache.tuscany.sca.assembly.Binding;
import org.apache.tuscany.sca.assembly.xml.Constants;
import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessorExtensionPoint;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.ModuleActivator;
import org.apache.tuscany.sca.extension.helper.BindingActivator;
import org.apache.tuscany.sca.extension.helper.ComponentLifecycle;
import org.apache.tuscany.sca.extension.helper.InvokerFactory;
import org.apache.tuscany.sca.interfacedef.InterfaceContract;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.invocation.Invoker;
import org.apache.tuscany.sca.invocation.Message;
import org.apache.tuscany.sca.provider.BindingProviderFactory;
import org.apache.tuscany.sca.provider.ProviderFactory;
import org.apache.tuscany.sca.provider.ProviderFactoryExtensionPoint;
import org.apache.tuscany.sca.provider.ReferenceBindingProvider;
import org.apache.tuscany.sca.provider.ServiceBindingProvider;
import org.apache.tuscany.sca.runtime.RuntimeComponent;
import org.apache.tuscany.sca.runtime.RuntimeComponentReference;
import org.apache.tuscany.sca.runtime.RuntimeComponentService;
public class BindingsActivator implements ModuleActivator {
protected List<BindingActivator> bindingActivators;
protected AssemblyFactory assemblyFactory;
protected Map<Class, BindingActivator> bindingActivatorMap = new HashMap<Class, BindingActivator>();
public void start(ExtensionPointRegistry registry) {
ModelFactoryExtensionPoint factories = registry.getExtensionPoint(ModelFactoryExtensionPoint.class);
this.assemblyFactory = factories.getFactory(AssemblyFactory.class);
this.bindingActivators =
DiscoveryUtils.discoverActivators(BindingActivator.class, getClass().getClassLoader(), registry);
StAXArtifactProcessorExtensionPoint staxProcessors =
registry.getExtensionPoint(StAXArtifactProcessorExtensionPoint.class);
ProviderFactoryExtensionPoint providerFactories =
registry.getExtensionPoint(ProviderFactoryExtensionPoint.class);
for (final BindingActivator bindingActivator : bindingActivators) {
Class bindingClass = bindingActivator.getBindingClass();
bindingActivatorMap.put(bindingClass, bindingActivator);
QName scdlQName = getBindingQName(bindingClass);
staxProcessors.addArtifactProcessor(new BindingSCDLProcessor(scdlQName, bindingClass));
// Check if the binding extends from Binding interface
if (Binding.class.isAssignableFrom(bindingClass)) {
// Add provider factory against the binding class
providerFactories.addProviderFactory(new DelegatingBindingProviderFactory(bindingClass));
}
}
// Add a generic provider factory against PojoBinding.class
providerFactories.addProviderFactory(new DelegatingBindingProviderFactory(PojoBinding.class));
}
public void stop(ExtensionPointRegistry registry) {
StAXArtifactProcessorExtensionPoint staxProcessors =
registry.getExtensionPoint(StAXArtifactProcessorExtensionPoint.class);
ProviderFactoryExtensionPoint providerFactories =
registry.getExtensionPoint(ProviderFactoryExtensionPoint.class);
for (final BindingActivator bindingActivator : bindingActivators) {
// Remove the binding SCDL processor from the runtime
if (staxProcessors != null) {
StAXArtifactProcessor processor =
staxProcessors.getProcessor(getBindingQName(bindingActivator.getBindingClass()));
if (processor != null) {
staxProcessors.removeArtifactProcessor(processor);
}
}
// Remove the ProviderFactory from the runtime
if (providerFactories != null && bindingActivator.getBindingClass() != null) {
ProviderFactory factory = providerFactories.getProviderFactory(bindingActivator.getBindingClass());
if (factory != null) {
providerFactories.removeProviderFactory(factory);
}
}
}
if (providerFactories != null) {
ProviderFactory factory = providerFactories.getProviderFactory(PojoBinding.class);
if (factory != null) {
providerFactories.removeProviderFactory(factory);
}
}
}
protected QName getBindingQName(Class bindingClass) {
String localName = bindingClass.getName();
if (localName.lastIndexOf('.') > -1) {
localName = localName.substring(localName.lastIndexOf('.') + 1);
}
if (localName.endsWith("Binding")) {
localName = localName.substring(0, localName.length() - 7);
}
StringBuilder sb = new StringBuilder(localName);
for (int i = 0; i < sb.length(); i++) {
if (Character.isUpperCase(sb.charAt(i))) {
sb.setCharAt(i, Character.toLowerCase(sb.charAt(i)));
} else {
break;
}
}
return new QName(Constants.SCA10_TUSCANY_NS, "binding." + sb.toString());
}
private final class DelegatingBindingProviderFactory implements BindingProviderFactory {
private Class modelType;
public DelegatingBindingProviderFactory(Class modelType) {
super();
this.modelType = modelType;
}
public ReferenceBindingProvider createReferenceBindingProvider(final RuntimeComponent rc,
final RuntimeComponentReference rcr,
final Binding b) {
final Object realBinding;
if (b instanceof PojoBinding) {
realBinding = ((PojoBinding)b).getUserBinding();
} else {
realBinding = b;
}
final BindingActivator bindingActivator = bindingActivatorMap.get(realBinding.getClass());
return new ReferenceBindingProvider() {
List<InvokerProxy> invokers = new ArrayList<InvokerProxy>();
private InvokerFactory factory;
public Invoker createInvoker(Operation operation, boolean isCallback) {
InvokerProxy invoker = new InvokerProxy(factory, operation);
invokers.add(invoker);
return invoker;
}
public InterfaceContract getBindingInterfaceContract() {
return null;
}
public void start() {
if (b instanceof PojoBinding) {
factory = bindingActivator.createInvokerFactory(rc, rcr, b, ((PojoBinding)b).getUserBinding());
} else {
factory = bindingActivator.createInvokerFactory(rc, rcr, b, b);
}
if (factory instanceof ComponentLifecycle) {
((ComponentLifecycle)factory).start();
}
// for (InvokerProxy invoker : invokers) {
// invoker.start(factory);
// }
}
public void stop() {
if (factory instanceof ComponentLifecycle) {
((ComponentLifecycle)factory).stop();
}
}
};
}
public ServiceBindingProvider createServiceBindingProvider(final RuntimeComponent rc,
final RuntimeComponentService rcs,
final Binding b) {
final Object realBinding;
if (b instanceof PojoBinding) {
realBinding = ((PojoBinding)b).getUserBinding();
} else {
realBinding = b;
}
final BindingActivator bindingActivator = bindingActivatorMap.get(realBinding.getClass());
return new ServiceBindingProvider() {
ComponentLifecycle listener = bindingActivator.createService(rc, rcs, b, realBinding);
public InterfaceContract getBindingInterfaceContract() {
return null;
}
public void start() {
listener.start();
}
public void stop() {
listener.stop();
}
};
}
public Class getModelType() {
return modelType;
}
}
}
class InvokerProxy implements Invoker {
InvokerFactory factory;
Invoker invoker;
Operation op;
InvokerProxy(InvokerFactory factory, Operation op) {
this.factory = factory;
this.op = op;
this.invoker = factory.createInvoker(op);
}
public Message invoke(Message arg0) {
return invoker.invoke(arg0);
}
// public void start(InvokerFactory factory) {
// invoker = factory.createInvoker(op);
// }
}