/*
* JBoss, Home of Professional Open Source
* Copyright 2010 Red Hat Inc. and/or its affiliates and other contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* 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.jboss.arquillian.core.impl;
import java.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.Callable;
import org.jboss.arquillian.core.api.Injector;
import org.jboss.arquillian.core.api.annotation.ApplicationScoped;
import org.jboss.arquillian.core.api.event.ManagerStarted;
import org.jboss.arquillian.core.api.event.ManagerStopping;
import org.jboss.arquillian.core.api.threading.ExecutorService;
import org.jboss.arquillian.core.impl.context.ApplicationContextImpl;
import org.jboss.arquillian.core.impl.threading.ThreadedExecutorService;
import org.jboss.arquillian.core.spi.EventContext;
import org.jboss.arquillian.core.spi.EventPoint;
import org.jboss.arquillian.core.spi.Extension;
import org.jboss.arquillian.core.spi.InjectionPoint;
import org.jboss.arquillian.core.spi.InvocationException;
import org.jboss.arquillian.core.spi.Manager;
import org.jboss.arquillian.core.spi.NonManagedObserver;
import org.jboss.arquillian.core.spi.ObserverMethod;
import org.jboss.arquillian.core.spi.Validate;
import org.jboss.arquillian.core.spi.context.ApplicationContext;
import org.jboss.arquillian.core.spi.context.Context;
import org.jboss.arquillian.core.spi.context.ObjectStore;
import org.jboss.arquillian.core.spi.event.ManagerProcessing;
/**
* ManagerImpl
*
* @author <a href="mailto:aslak@redhat.com">Aslak Knutsen</a>
* @version $Revision: $
*/
public class ManagerImpl implements Manager {
//-------------------------------------------------------------------------------------||
// Instance Members -------------------------------------------------------------------||
//-------------------------------------------------------------------------------------||
private final RuntimeLogger runtimeLogger;
private final List<Context> contexts;
private final List<Extension> extensions;
/*
* Hack:
* Events can be fired nested. If a nested handler throws a exception, the exception is fired on the bus for handling.
* It is up to the exception handler to re-throw the exception if it can't handle it. When the re-throw happens
* the higher level event will get the exception and re-fire it on the bus. We need to keep track of which exceptions
* has been handled in the call chain so we can re-throw without re-firing on a higher level.
*/
private ThreadLocal<Set<Class<? extends Throwable>>> handledThrowables =
new ThreadLocal<Set<Class<? extends Throwable>>>() {
@Override
protected Set<Class<? extends Throwable>> initialValue() {
return new HashSet<Class<? extends Throwable>>();
}
};
ManagerImpl(final Collection<Class<? extends Context>> contextClasses, final Collection<Class<?>> extensionClasses) {
this.contexts = new ArrayList<Context>();
this.extensions = new ArrayList<Extension>();
this.runtimeLogger = new RuntimeLogger();
try {
List<Extension> createdExtensions = createExtensions(extensionClasses);
List<Context> createdContexts = createContexts(contextClasses);
createBuiltInServices();
this.contexts.addAll(createdContexts);
this.extensions.addAll(createdExtensions);
addContextsToApplicationScope();
fireProcessing();
addContextsToApplicationScope();
} catch (Exception e) {
throw new RuntimeException("Could not create and process manager", e);
}
}
//-------------------------------------------------------------------------------------||
// Required Implementations - Manager -------------------------------------------------||
//-------------------------------------------------------------------------------------||
@Override
public void fire(Object event) {
fire(event, null);
}
/* (non-Javadoc)
* @see org.jboss.arquillian.impl.core.spi.Manager#fire(java.lang.Object, org.jboss.arquillian.impl.core.spi.NonManagedObserver)
*/
@Override
public <T> void fire(T event, NonManagedObserver<T> nonManagedObserver) {
Validate.notNull(event, "Event must be specified");
runtimeLogger.debug(event, true);
// we start fresh pr new event
handledThrowables.get().clear();
List<ObserverMethod> observers = resolveObservers(event.getClass());
List<ObserverMethod> interceptorObservers = resolveInterceptorObservers(event.getClass());
ApplicationContext context = (ApplicationContext) getScopedContext(ApplicationScoped.class);
// We need to know if we were to the one to Activate it to avoid:
// * nested ApplicationContexts
// * ending the scope to soon (to low in the stack)
boolean activatedApplicationContext = false;
try {
if (!context.isActive()) {
context.activate();
activatedApplicationContext = true;
}
new EventContextImpl<T>(this, interceptorObservers, observers, nonManagedObserver, event,
runtimeLogger).proceed();
} catch (Exception e) {
Throwable fireException = e;
if (fireException instanceof InvocationException) {
fireException = fireException.getCause();
}
if (handledThrowables.get().contains(fireException.getClass())) {
UncheckedThrow.throwUnchecked(fireException);
} else {
fireException(fireException);
}
} finally {
runtimeLogger.debug(event, false);
if (activatedApplicationContext && context.isActive()) {
context.deactivate();
}
}
}
@Override
public <T> void bind(Class<? extends Annotation> scope, Class<T> type, T instance) {
Validate.notNull(scope, "Scope must be specified");
Validate.notNull(type, "Type must be specified");
Validate.notNull(instance, "Instance must be specified");
Context scopedContext = getScopedContext(scope);
if (scopedContext == null) {
throw new IllegalArgumentException("No Context registered with support for scope: " + scope);
}
if (!scopedContext.isActive()) {
throw new IllegalArgumentException("No active " + scope.getSimpleName() + " Context to bind to");
}
scopedContext.getObjectStore().add(type, instance);
}
@Override
public <T> T resolve(Class<T> type) {
Validate.notNull(type, "Type must be specified");
List<Context> activeContexts = resolveActiveContexts();
for (int i = activeContexts.size() - 1; i >= 0; i--) {
Context context = activeContexts.get(i);
T object = context.getObjectStore().get(type);
if (object != null) {
return object;
}
}
return null;
}
@Override
public void inject(Object obj) {
inject(ExtensionImpl.of(obj));
}
/* (non-Javadoc)
* @see org.jboss.arquillian.spi.Manager#getContext(java.lang.Class)
*/
@Override
public <T> T getContext(Class<T> type) {
for (Context context : contexts) {
if (type.isInstance(context)) {
return type.cast(context);
}
}
return null;
}
//-------------------------------------------------------------------------------------||
// Exposed Convenience Impl Methods ---------------------------------------------------||
//-------------------------------------------------------------------------------------||
public <T> T executeInApplicationContext(Callable<T> callable) throws Exception {
ApplicationContext context = (ApplicationContext) getScopedContext(ApplicationScoped.class);
boolean activatedByUs = false;
try {
if (!context.isActive()) {
context.activate();
activatedByUs = true;
}
return callable.call();
} finally {
if (activatedByUs && context.isActive()) {
context.deactivate();
}
}
}
public List<Context> getContexts() {
return Collections.unmodifiableList(contexts);
}
/**
* @param <T>
* @param scope
* @param type
* @param instance
*/
public <T> void bindAndFire(Class<? extends Annotation> scope, Class<T> type, T instance) {
bind(scope, type, instance);
fire(instance);
}
/**
* @return the extensions
*/
public <T> T getExtension(Class<T> type) {
for (Extension extension : extensions) {
Object target = ((ExtensionImpl) extension).getTarget();
if (type.isInstance(target)) {
return type.cast(target);
}
}
return null;
}
/* (non-Javadoc)
* @see org.jboss.arquillian.core.spi.Manager#start()
*/
@Override
public void start() {
fire(new ManagerStarted());
getContext(ApplicationContext.class).activate();
}
/* (non-Javadoc)
* @see org.jboss.arquillian.core.spi.Manager#shutdown()
*/
@Override
public void shutdown() {
Throwable shutdownException = null;
try {
fire(new ManagerStopping());
} catch (Exception e) {
try {
fireException(e);
} catch (Exception e2) {
shutdownException = e2;
}
}
synchronized (this) {
for (Context context : contexts) {
context.clearAll();
}
contexts.clear();
extensions.clear();
runtimeLogger.clear();
handledThrowables.remove();
}
if (shutdownException != null) {
UncheckedThrow.throwUnchecked(shutdownException);
}
}
//-------------------------------------------------------------------------------------||
// Internal Helper Methods ------------------------------------------------------------||
//-------------------------------------------------------------------------------------||
public void fireProcessing() throws Exception {
final Set<Class<?>> extensions = new HashSet<Class<?>>();
final Set<Class<? extends Context>> contexts = new HashSet<Class<? extends Context>>();
fire(new ManagerProcessing() {
@Override
public ManagerProcessing observer(Class<?> observer) {
if (extensions.contains(observer)) {
throw new IllegalArgumentException(
"Attempted to register the same Observer: " + observer.getName()
+ " multiple times, please check classpath for conflicting jar versions");
}
extensions.add(observer);
return this;
}
@Override
public ManagerProcessing context(Class<? extends Context> context) {
if (contexts.contains(context)) {
throw new IllegalArgumentException(
"Attempted to register the same " + Context.class.getSimpleName() + " : " + context.getName()
+ " multiple times, please check classpath for conflicting jar versions");
}
contexts.add(context);
return this;
}
});
this.extensions.addAll(createExtensions(extensions));
this.contexts.addAll(createContexts(contexts));
}
boolean isExceptionHandled(Throwable e) {
return handledThrowables.get().contains(e.getClass());
}
void fireException(Throwable event) {
runtimeLogger.debug(event, true);
try {
List<ObserverMethod> observers = resolveObservers(event.getClass());
if (observers.size() == 0) // no one is handling this Exception, throw it out.
{
UncheckedThrow.throwUnchecked(event);
}
for (int i = 0; i < observers.size(); i++) {
ObserverMethod observer = observers.get(i);
try {
runtimeLogger.debug(observer, false);
observer.invoke(this, event);
} catch (Exception e) {
// getCause(InocationTargetException).getCause(RealCause);
Throwable toBeFired = e.getCause();
// same type of exception being fired as caught and is the last observer, throw to avoid loop
if (toBeFired.getClass() == event.getClass()) {
// on throw if this is the last Exception observer
if (i == observers.size() - 1) {
handledThrowables.get().add(toBeFired.getClass());
// this will throw checked exception if any, and will break the declaration of fire(), will throw the original cause
UncheckedThrow.throwUnchecked(toBeFired);
}
} else {
// a new exception was raised, throw
fireException(toBeFired);
}
}
}
} finally {
runtimeLogger.debug(event, false);
}
}
/**
* @param extensions
* @return
*/
private List<Extension> createExtensions(Collection<Class<?>> extensionClasses) throws Exception {
List<Extension> created = new ArrayList<Extension>();
for (Class<?> extensionClass : extensionClasses) {
Extension extension = ExtensionImpl.of(Reflections.createInstance(extensionClass));
inject(extension);
created.add(extension);
runtimeLogger.debugExtension(extensionClass);
}
return created;
}
/**
* @param contexts2
* @return
*/
private List<Context> createContexts(Collection<Class<? extends Context>> contextClasses) throws Exception {
List<Context> created = new ArrayList<Context>();
for (Class<? extends Context> contextClass : contextClasses) {
created.add(Reflections.createInstance(contextClass));
}
return created;
}
private void createBuiltInServices() throws Exception {
final ApplicationContext context = new ApplicationContextImpl();
contexts.add(context);
executeInApplicationContext(new Callable<Object>() {
@Override
public Object call() throws Exception {
ManagerImpl.this.bind(
ApplicationScoped.class, Injector.class, InjectorImpl.of(ManagerImpl.this));
ManagerImpl.this.bind(
ApplicationScoped.class, ExecutorService.class, new ThreadedExecutorService(ManagerImpl.this));
return null;
}
});
}
/**
* @param objectStore
*/
@SuppressWarnings("unchecked")
private void addContextsToApplicationScope() throws Exception {
executeInApplicationContext(new Callable<Void>() {
@Override
public Void call() throws Exception {
ApplicationContext appContext = getContext(ApplicationContext.class);
ObjectStore store = appContext.getObjectStore();
for (Context context : contexts) {
store.add((Class<Context>) context.getClass().getInterfaces()[0], context);
}
return null;
}
});
}
/**
* @param eventType
* @return
*/
private List<ObserverMethod> resolveObservers(Class<?> eventType) {
List<ObserverMethod> observers = new ArrayList<ObserverMethod>();
for (Extension extension : extensions) {
for (ObserverMethod observer : extension.getObservers()) {
if (Reflections.getType(observer.getType()).isAssignableFrom(eventType) && !Reflections.isType(
observer.getType(), EventContext.class)) {
observers.add(observer);
}
}
}
Collections.sort(observers);
return observers;
}
private List<ObserverMethod> resolveInterceptorObservers(Class<?> eventType) {
List<ObserverMethod> observers = new ArrayList<ObserverMethod>();
for (Extension extension : extensions) {
for (ObserverMethod observer : extension.getObservers()) {
if (Reflections.isType(observer.getType(), EventContext.class)) {
if (Reflections.getType(observer.getType()).isAssignableFrom(eventType)) {
observers.add(observer);
}
}
}
}
Collections.sort(observers);
return observers;
}
private List<Context> resolveActiveContexts() {
List<Context> activeContexts = new ArrayList<Context>();
for (Context context : contexts) {
if (context.isActive()) {
activeContexts.add(context);
}
}
return activeContexts;
}
private void inject(Extension extension) {
injectInstances(extension);
injectEvents(extension);
}
/**
* @param extension
*/
private void injectInstances(Extension extension) {
for (InjectionPoint point : extension.getInjectionPoints()) {
point.set(InstanceImpl.of(Reflections.getType(point.getType()), point.getScope(), this));
}
}
/**
* @param extension
*/
private void injectEvents(Extension extension) {
for (EventPoint point : extension.getEventPoints()) {
point.set(EventImpl.of(Reflections.getType(point.getType()), this));
}
}
private Context getScopedContext(Class<? extends Annotation> scope) {
for (Context context : contexts) {
if (context.getScope() == scope) {
return context;
}
}
return null;
}
}