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package org.apache.tuscany.container.java.builder;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.tuscany.container.java.assembly.JavaImplementation;
import org.apache.tuscany.container.java.config.JavaComponentRuntimeConfiguration;
import org.apache.tuscany.core.builder.BuilderConfigException;
import org.apache.tuscany.core.builder.BuilderException;
import org.apache.tuscany.core.builder.NoAccessorException;
import org.apache.tuscany.core.builder.RuntimeConfigurationBuilder;
import org.apache.tuscany.core.builder.impl.HierarchicalBuilder;
import org.apache.tuscany.core.builder.impl.ProxyObjectFactory;
import org.apache.tuscany.core.config.JavaIntrospectionHelper;
import org.apache.tuscany.core.context.AggregateContext;
import org.apache.tuscany.core.context.QualifiedName;
import org.apache.tuscany.core.injection.EventInvoker;
import org.apache.tuscany.core.injection.FactoryInitException;
import org.apache.tuscany.core.injection.FieldInjector;
import org.apache.tuscany.core.injection.Injector;
import org.apache.tuscany.core.injection.MethodEventInvoker;
import org.apache.tuscany.core.injection.MethodInjector;
import org.apache.tuscany.core.injection.SDOObjectFactory;
import org.apache.tuscany.core.injection.SingletonObjectFactory;
import org.apache.tuscany.core.invocation.InvocationConfiguration;
import org.apache.tuscany.core.invocation.MethodHashMap;
import org.apache.tuscany.core.invocation.ProxyConfiguration;
import org.apache.tuscany.core.invocation.impl.InvokerInterceptor;
import org.apache.tuscany.core.invocation.spi.ProxyFactory;
import org.apache.tuscany.core.invocation.spi.ProxyFactoryFactory;
import org.apache.tuscany.core.message.MessageFactory;
import org.apache.tuscany.core.runtime.RuntimeContext;
import org.apache.tuscany.core.system.annotation.Autowire;
import org.apache.tuscany.model.assembly.AssemblyModelObject;
import org.apache.tuscany.model.assembly.ConfiguredProperty;
import org.apache.tuscany.model.assembly.ConfiguredReference;
import org.apache.tuscany.model.assembly.ConfiguredService;
import org.apache.tuscany.model.assembly.Scope;
import org.apache.tuscany.model.assembly.Service;
import org.apache.tuscany.model.assembly.ServiceContract;
import org.apache.tuscany.model.assembly.SimpleComponent;
import org.osoa.sca.annotations.ComponentName;
import org.osoa.sca.annotations.Context;
import org.osoa.sca.annotations.Destroy;
import org.osoa.sca.annotations.Init;
import commonj.sdo.DataObject;
/**
* Builds runtime configurations for component implementations that map to
* {@link org.apache.tuscany.container.java.assembly.JavaImplementation}. The logical model is then decorated with the
* runtime configuration.
*
* @see org.apache.tuscany.core.builder.RuntimeConfiguration
*
* @version $Rev: 368822 $ $Date: 2006-01-13 10:54:38 -0800 (Fri, 13 Jan 2006) $
*/
@org.osoa.sca.annotations.Scope("MODULE")
public class JavaComponentContextBuilder implements RuntimeConfigurationBuilder<AggregateContext> {
private RuntimeContext runtimeContext;
private ProxyFactoryFactory proxyFactoryFactory;
private MessageFactory messageFactory;
/* the top-level builder responsible for evaluating policies */
private HierarchicalBuilder policyBuilder = new HierarchicalBuilder();
@Init(eager = true)
public void init() {
runtimeContext.addBuilder(this);
}
/**
* @param runtimeContext The runtimeContext to set.
*/
@Autowire
public void setRuntimeContext(RuntimeContext runtimeContext) {
this.runtimeContext = runtimeContext;
}
/**
* Sets the factory used to construct proxies implmementing the business interface required by a reference
*/
@Autowire
public void setProxyFactoryFactory(ProxyFactoryFactory factory) {
this.proxyFactoryFactory = factory;
}
/**
* Sets the factory used to construct invocation messages
*
* @param msgFactory
*/
@Autowire
public void setMessageFactory(MessageFactory msgFactory) {
this.messageFactory = msgFactory;
}
/**
* Adds a builder responsible for creating source-side and target-side invocation chains for a reference. The
* reference builder may be hierarchical, containing other child reference builders that operate on specific
* metadata used to construct and invocation chain.
*/
public void addPolicyBuilder(RuntimeConfigurationBuilder builder) {
policyBuilder.addBuilder(builder);
}
// ----------------------------------
// Constructors
// ----------------------------------
public JavaComponentContextBuilder() {
}
// ----------------------------------
// Methods
// ----------------------------------
public void build(AssemblyModelObject modelObject, AggregateContext parentContext) throws BuilderException {
if (!(modelObject instanceof SimpleComponent)) {
return;
}
SimpleComponent component = (SimpleComponent) modelObject;
if (component.getComponentImplementation() instanceof JavaImplementation) {
JavaImplementation javaImpl = (JavaImplementation) component.getComponentImplementation();
// FIXME scope
Scope scope = component.getComponentImplementation().getComponentType().getServices().get(0).getServiceContract()
.getScope();
Class implClass = null;
Set<Field> fields;
Set<Method> methods;
try {
implClass = javaImpl.getImplementationClass();
fields = JavaIntrospectionHelper.getAllFields(implClass);
methods = JavaIntrospectionHelper.getAllUniqueMethods(implClass);
String name = component.getName();
Constructor ctr = implClass.getConstructor((Class[]) null);
List<Injector> injectors = new ArrayList();
EventInvoker initInvoker = null;
boolean eagerInit = false;
EventInvoker destroyInvoker = null;
for (Field field : fields) {
ComponentName compName = field.getAnnotation(ComponentName.class);
if (compName != null) {
Injector injector = new FieldInjector(field, new SingletonObjectFactory(name));
injectors.add(injector);
}
Context context = field.getAnnotation(Context.class);
if (context != null) {
Injector injector = new FieldInjector(field, new SingletonObjectFactory(parentContext));
injectors.add(injector);
}
}
for (Method method : methods) {
Init init = method.getAnnotation(Init.class);
if (init != null && initInvoker == null) {
initInvoker = new MethodEventInvoker(method);
eagerInit = init.eager();
continue;
}
// @spec - should we allow the same method to have @init and
// @destroy?
Destroy destroy = method.getAnnotation(Destroy.class);
if (destroy != null && destroyInvoker == null) {
destroyInvoker = new MethodEventInvoker(method);
continue;
}
ComponentName compName = method.getAnnotation(ComponentName.class);
if (compName != null) {
Injector injector = new MethodInjector(method, new SingletonObjectFactory(name));
injectors.add(injector);
}
Context context = method.getAnnotation(Context.class);
if (context != null) {
Injector injector = new MethodInjector(method, new SingletonObjectFactory(parentContext));
injectors.add(injector);
}
}
// handle properties
List<ConfiguredProperty> configuredProperties = component.getConfiguredProperties();
if (configuredProperties != null) {
for (ConfiguredProperty property : configuredProperties) {
Injector injector = createPropertyInjector(property, fields, methods);
injectors.add(injector);
}
}
JavaComponentRuntimeConfiguration config = new JavaComponentRuntimeConfiguration(name, JavaIntrospectionHelper
.getDefaultConstructor(implClass), eagerInit, initInvoker, destroyInvoker, scope);
component.getComponentImplementation().setRuntimeConfiguration(config);
// create target-side invocation chains for each service offered by the implementation
for (ConfiguredService configuredService : component.getConfiguredServices()) {
Service service = configuredService.getService();
ServiceContract serviceContract = service.getServiceContract();
Map<Method, InvocationConfiguration> iConfigMap = new MethodHashMap();
ProxyFactory proxyFactory = proxyFactoryFactory.createProxyFactory();
Set<Method> javaMethods = JavaIntrospectionHelper.getAllUniqueMethods(serviceContract.getInterface());
for (Method method : javaMethods) {
InvocationConfiguration iConfig = new InvocationConfiguration(method);
iConfigMap.put(method, iConfig);
}
QualifiedName qName = new QualifiedName(component.getName() + QualifiedName.NAME_SEPARATOR + service.getName());
ProxyConfiguration pConfiguration = new ProxyConfiguration(qName, iConfigMap, serviceContract.getInterface()
.getClassLoader(), messageFactory);
proxyFactory.setBusinessInterface(serviceContract.getInterface());
proxyFactory.setProxyConfiguration(pConfiguration);
config.addTargetProxyFactory(service.getName(), proxyFactory);
configuredService.setProxyFactory(proxyFactory);
if (policyBuilder != null) {
// invoke the reference builder to handle target-side metadata
policyBuilder.build(configuredService, parentContext);
}
// add tail interceptor
for (InvocationConfiguration iConfig : (Collection<InvocationConfiguration>) iConfigMap.values()) {
iConfig.addTargetInterceptor(new InvokerInterceptor());
}
}
// handle references
List<ConfiguredReference> configuredReferences = component.getConfiguredReferences();
if (configuredReferences != null) {
for (ConfiguredReference reference : configuredReferences) {
ProxyFactory proxyFactory = proxyFactoryFactory.createProxyFactory();
ServiceContract serviceContract = reference.getReference().getServiceContract();
Map<Method, InvocationConfiguration> iConfigMap = new HashMap();
Set<Method> javaMethods = JavaIntrospectionHelper.getAllUniqueMethods(serviceContract.getInterface());
for (Method method : javaMethods) {
InvocationConfiguration iConfig = new InvocationConfiguration(method);
iConfigMap.put(method, iConfig);
}
String targetCompName = reference.getTargetConfiguredServices().get(0).getAggregatePart().getName();
String targetSerivceName = reference.getTargetConfiguredServices().get(0).getService().getName();
QualifiedName qName = new QualifiedName(targetCompName + "/" + targetSerivceName);
// QualifiedName qName = new QualifiedName(reference.getAggregatePart().getName() + "/"
// + reference.getPort().getName());
ProxyConfiguration pConfiguration = new ProxyConfiguration(qName, iConfigMap, serviceContract.getInterface().getClassLoader(), messageFactory);
proxyFactory.setBusinessInterface(serviceContract.getInterface());
proxyFactory.setProxyConfiguration(pConfiguration);
config.addSourceProxyFactory(reference.getReference().getName(), proxyFactory);
reference.setProxyFactory(proxyFactory);
if (policyBuilder != null) {
// invoke the reference builder to handle metadata associated with the reference
policyBuilder.build(reference, parentContext);
}
Injector injector = createReferenceInjector(reference.getReference().getName(), proxyFactory, fields,
methods);
injectors.add(injector);
}
}
config.setSetters(injectors);
} catch (BuilderException e) {
e.addContextName(component.getName());
e.addContextName(parentContext.getName());
throw e;
} catch (NoSuchMethodException e) {
BuilderConfigException ce = new BuilderConfigException("Class does not have a no-arg constructor", e);
ce.setIdentifier(implClass.getName());
ce.addContextName(component.getName());
ce.addContextName(parentContext.getName());
throw ce;
}
}
}
// ----------------------------------
// Private methods
// ----------------------------------
/**
* Creates an <code>Injector</code> for component properties
*/
private Injector createPropertyInjector(ConfiguredProperty property, Set<Field> fields, Set<Method> methods)
throws NoAccessorException {
Object value = property.getValue();
String propName = property.getProperty().getName();
Class type = value.getClass();
// There is no efficient way to do this
Method method = null;
Field field = JavaIntrospectionHelper.findClosestMatchingField(propName, type, fields);
if (field == null) {
method = JavaIntrospectionHelper.findClosestMatchingMethod(propName, new Class[] { type }, methods);
if (method == null) {
throw new NoAccessorException(propName);
}
}
Injector injector = null;
if (value instanceof DataObject) {
if (field != null) {
injector = new FieldInjector(field, new SDOObjectFactory((DataObject) value));
} else {
injector = new MethodInjector(method, new SDOObjectFactory((DataObject) value));
}
} else if (JavaIntrospectionHelper.isImmutable(type)) {
if (field != null) {
injector = new FieldInjector(field, new SingletonObjectFactory(value));
} else {
injector = new MethodInjector(method, new SingletonObjectFactory(value));
}
}
return injector;
}
/**
* Creates an <code>Injector</code> for service references
*/
private Injector createReferenceInjector(String refName, ProxyFactory proxyFactory, Set<Field> fields, Set<Method> methods)
throws NoAccessorException, BuilderConfigException {
Method method = null;
Field field = JavaIntrospectionHelper.findClosestMatchingField(refName, proxyFactory.getBusinessInterface(), fields);
if (field == null) {
method = JavaIntrospectionHelper.findClosestMatchingMethod(refName,
new Class[] { proxyFactory.getBusinessInterface() }, methods);
if (method == null) {
throw new NoAccessorException(refName);
}
}
Injector injector;
try {
if (field != null) {
injector = new FieldInjector(field, new ProxyObjectFactory(proxyFactory));
} else {
injector = new MethodInjector(method, new ProxyObjectFactory(proxyFactory));
}
} catch (FactoryInitException e) {
BuilderConfigException ce = new BuilderConfigException("Error configuring reference", e);
ce.setIdentifier(refName);
throw ce;
}
return injector;
}
}
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