/*
* JBoss, Home of Professional Open Source
* Copyright 2015, Red Hat, Inc., and individual 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.weld.probe;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import java.util.regex.Pattern;
import javax.enterprise.context.Destroyed;
import javax.enterprise.context.Initialized;
import javax.enterprise.event.Reception;
import javax.enterprise.event.TransactionPhase;
import javax.enterprise.inject.Vetoed;
import javax.enterprise.inject.spi.EventMetadata;
import javax.enterprise.inject.spi.ObserverMethod;
import javax.enterprise.inject.spi.Prioritized;
import javax.interceptor.Interceptor;
import org.jboss.weld.event.CurrentEventMetadata;
import org.jboss.weld.event.ObserverNotifier;
import org.jboss.weld.event.ResolvedObservers;
import org.jboss.weld.manager.BeanManagerImpl;
import org.jboss.weld.util.collections.ImmutableList;
import org.jboss.weld.util.reflection.Formats;
/**
* Catch-all observer with low priority (called first) that captures all events within the application.
*
* @author Jozef Hartinger
*
*/
@Vetoed
class ProbeObserver implements ObserverMethod<Object>, Prioritized {
private static final int PRIORITY_OFFSET = 100;
private final Pattern excludePattern;
private final Probe probe;
private final CurrentEventMetadata currentEventMetadata;
private final BeanManagerImpl manager;
/**
*
* @param manager
* @param excludePattern
* @param probe
*/
ProbeObserver(BeanManagerImpl manager, Pattern excludePattern, Probe probe) {
this.currentEventMetadata = manager.getServices().get(CurrentEventMetadata.class);
this.manager = manager;
this.excludePattern = excludePattern;
this.probe = probe;
}
@Override
public Class<?> getBeanClass() {
return ProbeExtension.class;
}
@Override
public Type getObservedType() {
return Object.class;
}
@Override
public Set<Annotation> getObservedQualifiers() {
return Collections.emptySet();
}
@Override
public Reception getReception() {
return Reception.ALWAYS;
}
@Override
public TransactionPhase getTransactionPhase() {
return TransactionPhase.IN_PROGRESS;
}
@Override
public void notify(Object event) {
EventMetadata metadata = currentEventMetadata.peek();
if (excludePattern != null && excludePattern.matcher(Formats.formatType(metadata.getType(), false)).matches()) {
ProbeLogger.LOG.eventExcluded(metadata.getType());
return;
}
boolean containerEvent = isContainerEvent(metadata.getQualifiers());
List<ObserverMethod<?>> observers = resolveObservers(metadata, containerEvent);
EventInfo info = new EventInfo(metadata.getType(), metadata.getQualifiers(), event, metadata.getInjectionPoint(), observers, containerEvent,
System.currentTimeMillis());
probe.addEvent(info);
}
private List<ObserverMethod<?>> resolveObservers(EventMetadata metadata, boolean containerEvent) {
List<ObserverMethod<?>> observers = new ArrayList<ObserverMethod<?>>();
final ObserverNotifier notifier = (containerEvent) ? manager.getAccessibleLenientObserverNotifier() : manager.getGlobalLenientObserverNotifier();
ResolvedObservers<?> resolvedObservers = notifier.resolveObserverMethods(metadata.getType(), metadata.getQualifiers());
for (ObserverMethod<?> observer : resolvedObservers.getAllObservers()) {
// do not show ProbeObserver
if (getBeanClass() != observer.getBeanClass()) {
observers.add(observer);
}
}
return ImmutableList.copyOf(observers);
}
@Override
public int getPriority() {
return Interceptor.Priority.PLATFORM_BEFORE + PRIORITY_OFFSET;
}
private boolean isContainerEvent(Set<Annotation> qualifiers) {
for (Annotation annotation : qualifiers) {
if (annotation.annotationType() == Initialized.class || annotation.annotationType() == Destroyed.class) {
return true;
}
}
return false;
}
}