org.jboss.weld.probe.Components Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of weld-servlet-shaded Show documentation
Show all versions of weld-servlet-shaded Show documentation
This jar bundles all the bits of Weld and CDI required for running in a Servlet container.
/*
* JBoss, Home of Professional Open Source
* Copyright 2014, 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 static org.jboss.weld.probe.Strings.INFO_FETCHING_LAZILY;
import java.io.UnsupportedEncodingException;
import java.lang.annotation.Annotation;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.UUID;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.context.ContextNotActiveException;
import javax.enterprise.context.ConversationScoped;
import javax.enterprise.context.Dependent;
import javax.enterprise.context.RequestScoped;
import javax.enterprise.context.SessionScoped;
import javax.enterprise.context.spi.Context;
import javax.enterprise.inject.AmbiguousResolutionException;
import javax.enterprise.inject.Vetoed;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.Decorator;
import javax.enterprise.inject.spi.InjectionPoint;
import javax.enterprise.inject.spi.Interceptor;
import javax.enterprise.inject.spi.SessionBeanType;
import org.jboss.weld.bean.ForwardingBean;
import org.jboss.weld.bean.ManagedBean;
import org.jboss.weld.bean.ProducerField;
import org.jboss.weld.bean.ProducerMethod;
import org.jboss.weld.bean.SessionBean;
import org.jboss.weld.bean.builtin.AbstractBuiltInBean;
import org.jboss.weld.bean.builtin.ExtensionBean;
import org.jboss.weld.bean.builtin.InstanceImpl;
import org.jboss.weld.bean.builtin.ee.EEResourceProducerField;
import org.jboss.weld.ejb.spi.EjbDescriptor;
import org.jboss.weld.exceptions.IllegalStateException;
import org.jboss.weld.logging.BeanLogger;
import org.jboss.weld.manager.BeanManagerImpl;
import org.jboss.weld.serialization.spi.BeanIdentifier;
import org.jboss.weld.util.collections.ImmutableMap;
/**
* A few utility methods and classes related to CDI components.
*
* @author Martin Kouba
*/
@Vetoed
final class Components {
static final Map> INSPECTABLE_SCOPES = ImmutableMap.> builder()
.put("application", ApplicationScoped.class).put("session", SessionScoped.class).put("conversation", ConversationScoped.class).build();
static final Comparator> PROBE_COMPONENT_CLASS_COMPARATOR = new Comparator>() {
@Override
public int compare(Class o1, Class o2) {
// Probe components should have the lowest priority when sorting
int result = Boolean.compare(isProbeComponent(o1), isProbeComponent(o2));
// Unless decided compare the class names lexicographically
return result == 0 ? o1.getName().compareTo(o2.getName()) : result;
}
};
static final Comparator PROBE_COMPONENT_ANNOTATION_COMPARATOR = new Comparator() {
@Override
public int compare(Annotation o1, Annotation o2) {
// Probe components should have the lowest priority when sorting
int result = Boolean.compare(isProbeAnnotation(o1), isProbeAnnotation(o2));
// Unless decided compare the class names lexicographically
return result == 0 ? o1.annotationType().getName().compareTo(o2.annotationType().getName()) : result;
}
};
private Components() {
}
/**
*
* @param bean
* @param beanManager
* @return
*/
static Object findContextualInstance(Bean bean, BeanManagerImpl beanManager) {
Context context;
try {
context = beanManager.getContext(bean.getScope());
} catch (ContextNotActiveException e) {
return null;
}
return context.get(bean);
}
/**
*
* @param beanIdentifier
* @return a generated id for the given beanIdentifier
*/
static String getId(BeanIdentifier beanIdentifier) {
return getId(beanIdentifier.asString());
}
/**
*
* @param identifier
* @return a generated id for the given string identifier
*/
static String getId(String identifier) {
try {
return UUID.nameUUIDFromBytes(identifier.getBytes("UTF-8")).toString();
} catch (UnsupportedEncodingException e) {
throw new IllegalStateException(e);
}
}
/**
*
* @param builtinBean
* @return a generated id for the given built-in bean
*/
static String getBuiltinBeanId(AbstractBuiltInBean builtinBean) {
return getId(builtinBean.getTypes().toString());
}
/**
*
* @param bean
* @param probe
* @return the set of dependents
*/
static Set getDependents(Bean bean, Probe probe) {
return getDependents(bean, probe.getBeans(), probe, false);
}
/**
*
* @param bean
* @param beans
* @param probe
* @param firstMatch
* @return the set of dependents
*/
static Set getDependents(Bean bean, Collection> beans, Probe probe, boolean firstMatch) {
Set dependents = new HashSet();
for (Bean candidate : beans) {
if (candidate.equals(bean)) {
continue;
}
BeanManager beanManager = probe.getBeanManager(candidate);
if (beanManager == null) {
// Don't process built-in beans
continue;
}
Set injectionPoints = candidate.getInjectionPoints();
if (injectionPoints != null && !injectionPoints.isEmpty()) {
for (InjectionPoint injectionPoint : injectionPoints) {
if (injectionPoint.isDelegate()) {
// Do not include delegate injection points
continue;
}
Set> foundBeans = beanManager.getBeans(injectionPoint.getType(),
injectionPoint.getQualifiers().toArray(new Annotation[injectionPoint.getQualifiers().size()]));
if (foundBeans.isEmpty()) {
continue;
}
Bean candidateDependency;
try {
candidateDependency = beanManager.resolve(foundBeans);
} catch (AmbiguousResolutionException e) {
continue;
}
if (candidateDependency.getBeanClass().equals(InstanceImpl.class)) {
Bean lazilyFetched = getInstanceResolvedBean(beanManager, injectionPoint);
if (lazilyFetched != null && lazilyFetched.equals(bean)) {
dependents.add(Dependency.createPotential(candidate, injectionPoint, INFO_FETCHING_LAZILY));
if (firstMatch) {
break;
} else {
continue;
}
}
}
boolean satisfies = false;
if (isBuiltinBeanButNotExtension(candidateDependency)) {
satisfies = bean.equals(probe.getBean(Components.getBuiltinBeanId((AbstractBuiltInBean) candidateDependency)));
} else {
satisfies = bean.equals(candidateDependency);
}
if (satisfies) {
dependents.add(new Dependency(candidate, injectionPoint));
if (firstMatch) {
break;
} else {
continue;
}
}
}
}
}
return dependents;
}
/**
*
* @param bean
* @param beans
* @param probe
* @return true if there's at least one bean which depends on the given bean, false otherwise
*/
static boolean hasDependents(Bean bean, Collection> beans, Probe probe) {
return !getDependents(bean, beans, probe, true).isEmpty();
}
/**
*
* @param bean
* @param beanManager
* @param probe
* @return the set of dependencies
*/
static Set getDependencies(Bean bean, BeanManager beanManager, Probe probe) {
Set dependencies = new HashSet();
Set injectionPoints = bean.getInjectionPoints();
if (injectionPoints != null && !injectionPoints.isEmpty()) {
for (InjectionPoint injectionPoint : injectionPoints) {
if (injectionPoint.isDelegate()) {
// Do not include delegate injection points
continue;
}
Set> beans = beanManager.getBeans(injectionPoint.getType(),
injectionPoint.getQualifiers().toArray(new Annotation[injectionPoint.getQualifiers().size()]));
if (beans.isEmpty()) {
dependencies.add(Dependency.createUnsatisfied(injectionPoint, null));
} else {
try {
Bean dependency = beanManager.resolve(beans);
if (isBuiltinBeanButNotExtension(dependency)) {
dependency = probe.getBean(Components.getBuiltinBeanId((AbstractBuiltInBean) dependency));
}
dependencies.add(new Dependency(dependency, injectionPoint));
} catch (AmbiguousResolutionException e) {
dependencies.add(Dependency.createAmbiguous(injectionPoint, null));
}
}
}
}
return dependencies;
}
/**
*
* @return the bean if a satisfied and unambiguous dependency is found for the Instance required type and quialifiers
*/
static Bean getInstanceResolvedBean(BeanManager beanManager, InjectionPoint injectionPoint) {
try {
Set> beans = beanManager.getBeans(getFacadeType(injectionPoint),
injectionPoint.getQualifiers().toArray(new Annotation[injectionPoint.getQualifiers().size()]));
if (!beans.isEmpty()) {
return beanManager.resolve(beans);
}
} catch (Exception ignored) {
}
return null;
}
static Type getFacadeType(InjectionPoint injectionPoint) {
Type genericType = injectionPoint.getType();
if (genericType instanceof ParameterizedType) {
return ((ParameterizedType) genericType).getActualTypeArguments()[0];
} else {
throw new IllegalStateException(BeanLogger.LOG.typeParameterMustBeConcrete(injectionPoint));
}
}
static boolean isBuiltinScope(Class scope) {
return Dependent.class.equals(scope) || RequestScoped.class.equals(scope) || ApplicationScoped.class.equals(scope) || SessionScoped.class.equals(scope)
|| ConversationScoped.class.equals(scope);
}
static boolean isInspectableScope(String id) {
return INSPECTABLE_SCOPES.containsKey(id);
}
static boolean isInspectableScope(Class scope) {
return INSPECTABLE_SCOPES.containsValue(scope);
}
static String getInspectableScopeId(Class scope) {
for (Entry> inspectable : INSPECTABLE_SCOPES.entrySet()) {
if (inspectable.getValue().equals(scope)) {
return inspectable.getKey();
}
}
return null;
}
static SessionBeanType getSessionBeanType(EjbDescriptor ejbDescriptor) {
if (ejbDescriptor.isStateless()) {
return SessionBeanType.STATELESS;
} else if (ejbDescriptor.isStateful()) {
return SessionBeanType.STATEFUL;
} else if (ejbDescriptor.isSingleton()) {
return SessionBeanType.SINGLETON;
}
throw new IllegalStateException("Not a session bean");
}
/**
* Built-in beans require a special treatment.
*
* @param bean
* @return true if the bean is a built-in bean but not an extension, false otherwise
*/
static boolean isBuiltinBeanButNotExtension(Bean bean) {
return bean instanceof AbstractBuiltInBean && !(bean instanceof ExtensionBean);
}
/**
*
* @param manager
* @return the number of enabled beans, without built-in, extensions, interceptors, decorators
*/
static Integer getNumberOfEnabledBeans(BeanManagerImpl manager) {
List> enabledBeans = manager.getBeans();
int count = 0;
for (Bean bean : enabledBeans) {
if (!Components.isBuiltinBeanButNotExtension(bean)) {
count++;
}
}
return count;
}
/**
*
* @param clazz
* @return true if the given class is a probe component class, false otherwise
*/
static boolean isProbeComponent(Class clazz) {
return clazz.getName().startsWith(Probe.class.getPackage().getName());
}
/**
*
* @param annotation
* @return true if the given annotation is a probe annotation, false otherwise
*/
static boolean isProbeAnnotation(Annotation annotation) {
return isProbeComponent(annotation.annotationType());
}
/**
*
* @param candidates
* @return the sorted list of classes, where the probe component class have the lowest priority
*/
static List> getSortedProbeComponetCandidates(Collection> candidates) {
List> result = new ArrayList>(candidates);
Collections.sort(result, Components.PROBE_COMPONENT_CLASS_COMPARATOR);
return result;
}
/**
*
* @param candidates
* @return the sorted list of annotations, where the probe component annotations have the lowest priority
*/
static List getSortedProbeComponetAnnotationCandidates(Collection candidates) {
List result = new ArrayList(candidates);
Collections.sort(result, Components.PROBE_COMPONENT_ANNOTATION_COMPARATOR);
return result;
}
/**
*
* @author Martin Kouba
*/
static class Dependency {
static Dependency createPotential(Bean bean, InjectionPoint injectionPoint, String info) {
return new Dependency(bean, injectionPoint, info, true, false, false);
}
static Dependency createUnsatisfied(InjectionPoint injectionPoint, String info) {
return new Dependency(null, injectionPoint, info, false, true, false);
}
static Dependency createAmbiguous(InjectionPoint injectionPoint, String info) {
return new Dependency(null, injectionPoint, info, false, false, true);
}
private final Bean bean;
private final InjectionPoint injectionPoint;
private final String info;
private final boolean isPotential;
private final boolean isUnsatisfied;
private final boolean isAmbiguous;
Dependency(Bean bean, InjectionPoint injectionPoint) {
this(bean, injectionPoint, null, false, false, false);
}
Dependency(Bean bean, InjectionPoint injectionPoint, String info, boolean isPotential, boolean isUnsatisfied, boolean isAmbiguous) {
this.bean = bean;
this.injectionPoint = injectionPoint;
this.info = info;
this.isPotential = isPotential;
this.isUnsatisfied = isUnsatisfied;
this.isAmbiguous = isAmbiguous;
}
Bean getBean() {
return bean;
}
InjectionPoint getInjectionPoint() {
return injectionPoint;
}
String getInfo() {
return info;
}
boolean isPotential() {
return isPotential;
}
boolean isUnsatisfied() {
return isUnsatisfied;
}
boolean isAmbiguous() {
return isAmbiguous;
}
}
/**
*
* @author Martin Kouba
*/
static enum BeanKind {
MANAGED, SESSION, PRODUCER_METHOD, PRODUCER_FIELD, RESOURCE, SYNTHETIC, INTERCEPTOR, DECORATOR, EXTENSION, BUILT_IN;
static BeanKind from(Bean bean) {
if (bean == null) {
return null;
}
if (bean instanceof ForwardingBean) {
// Unwrap the forwarding implementation
ForwardingBean forwarding = (ForwardingBean) bean;
bean = forwarding.delegate();
}
if (bean instanceof SessionBean) {
return SESSION;
} else if (bean instanceof ManagedBean) {
if (bean instanceof Decorator) {
return DECORATOR;
} else if (bean instanceof Interceptor) {
return INTERCEPTOR;
} else {
return MANAGED;
}
} else if (bean instanceof EEResourceProducerField) {
return RESOURCE;
} else if (bean instanceof ProducerField) {
return PRODUCER_FIELD;
} else if (bean instanceof ProducerMethod) {
return PRODUCER_METHOD;
} else if (bean instanceof ExtensionBean) {
return EXTENSION;
} else if (bean instanceof AbstractBuiltInBean) {
return BUILT_IN;
} else {
return SYNTHETIC;
}
}
static BeanKind from(String value) {
try {
return valueOf(value);
} catch (Exception e) {
return null;
}
}
}
/**
* Priority ranges, as defined in {@link javax.interceptor.Interceptor.PRIORITY}
*
* @author Jozef Hartinger
*
*/
static enum PriorityRange {
PLATFORM_BEFORE, LIBRARY_BEFORE, APPLICATION, LIBRARY_AFTER, PLATFORM_AFTER, UNKNOWN;
@SuppressWarnings("magicnumber")
static PriorityRange of(int priority) {
if (priority < 0 || priority >= 5000) {
return UNKNOWN;
}
if (priority >= 4000) {
return PLATFORM_AFTER;
}
if (priority >= 3000) {
return LIBRARY_AFTER;
}
if (priority >= 2000) {
return APPLICATION;
}
if (priority >= 1000) {
return LIBRARY_BEFORE;
}
return PLATFORM_BEFORE;
}
}
}