JerseyResourceContext.java
/*
* Copyright (c) 2012, 2019 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.glassfish.jersey.server.internal;
import java.lang.annotation.Annotation;
import java.util.Collection;
import java.util.Collections;
import java.util.IdentityHashMap;
import java.util.Set;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.ws.rs.container.ResourceContext;
import javax.inject.Scope;
import javax.inject.Singleton;
import org.glassfish.jersey.internal.inject.Binding;
import org.glassfish.jersey.internal.inject.Bindings;
import org.glassfish.jersey.internal.inject.ClassBinding;
import org.glassfish.jersey.internal.inject.CustomAnnotationLiteral;
import org.glassfish.jersey.internal.inject.Providers;
import org.glassfish.jersey.internal.util.ReflectionHelper;
import org.glassfish.jersey.model.ContractProvider;
import org.glassfish.jersey.process.internal.RequestScoped;
import org.glassfish.jersey.server.ExtendedResourceContext;
import org.glassfish.jersey.server.model.ResourceModel;
/**
* Jersey implementation of JAX-RS {@link ResourceContext resource context}.
*
* @author Marek Potociar
*/
public class JerseyResourceContext implements ExtendedResourceContext {
private final Function<Class<?>, ?> getOrCreateInstance;
private final Consumer<Object> injectInstance;
private final Consumer<Binding> registerBinding;
private final Set<Class<?>> bindingCache;
private final Object bindingCacheLock;
private volatile ResourceModel resourceModel;
/**
* Creates a new JerseyResourceContext.
*
* @param getOrCreateInstance function to create or get existing instance.
* @param injectInstance consumer to inject instances into an unmanaged instance.
* @param registerBinding consumer to register a new binding into injection manager.
*/
public JerseyResourceContext(
Function<Class<?>, ?> getOrCreateInstance,
Consumer<Object> injectInstance,
Consumer<Binding> registerBinding) {
this.getOrCreateInstance = getOrCreateInstance;
this.injectInstance = injectInstance;
this.registerBinding = registerBinding;
this.bindingCache = Collections.newSetFromMap(new IdentityHashMap<>());
this.bindingCacheLock = new Object();
}
@Override
@SuppressWarnings("unchecked")
public <T> T getResource(Class<T> resourceClass) {
try {
return (T) getOrCreateInstance.apply(resourceClass);
} catch (Exception ex) {
Logger.getLogger(JerseyResourceContext.class.getName()).log(Level.WARNING,
LocalizationMessages.RESOURCE_LOOKUP_FAILED(resourceClass), ex);
}
return null;
}
@Override
public <T> T initResource(T resource) {
injectInstance.accept(resource);
return resource;
}
/**
* Binds {@code resourceClass} into HK2 context as singleton.
*
* The bound class is then cached internally so that any sub-sequent attempt to bind that class
* as a singleton is silently ignored.
*
* @param <T> type of the resource class.
* @param resourceClass resource class that should be bound. If the class is not
* annotated with {@link javax.inject.Singleton Singleton annotation} it
* will be ignored by this method.
*/
public <T> void bindResource(Class<T> resourceClass) {
if (bindingCache.contains(resourceClass)) {
return;
}
synchronized (bindingCacheLock) {
if (bindingCache.contains(resourceClass)) {
return;
}
unsafeBindResource(resourceClass, null);
}
}
/**
* Binds {@code resourceClass} into HK2 context as singleton.
*
* The bound class is then cached internally so that any sub-sequent attempt to bind that class
* as a singleton is silently ignored.
*
* @param resource singleton resource instance that should be bound as singleton. If the class is not
* annotated with {@link javax.inject.Singleton Singleton annotation} it
* will be ignored by this method.
*/
@SuppressWarnings("unchecked")
public <T> void bindResourceIfSingleton(T resource) {
final Class<?> resourceClass = resource.getClass();
if (bindingCache.contains(resourceClass)) {
return;
}
synchronized (bindingCacheLock) {
if (bindingCache.contains(resourceClass)) {
return;
}
if (getScope(resourceClass) == Singleton.class) {
registerBinding.accept(Bindings.service(resource).to((Class<? super T>) resourceClass));
}
bindingCache.add(resourceClass);
}
}
/**
* Bind a resource instance in a InjectionManager.
*
* The bound resource instance is internally cached to make sure any sub-sequent attempts to service the
* class are silently ignored.
* <p>
* WARNING: This version of method is not synchronized as well as the cache is not checked for existing
* bindings before the resource is bound and cached.
* </p>
*
* @param resource resource instance to be bound.
* @param providerModel provider model for the resource class. If not {@code null}, the class
* wil be bound as a contract provider too.
*/
public void unsafeBindResource(Object resource, ContractProvider providerModel) {
Binding binding;
Class<?> resourceClass = resource.getClass();
if (providerModel != null) {
Class<? extends Annotation> scope = providerModel.getScope();
binding = Bindings.service(resource).to(resourceClass);
for (Class contract : Providers.getProviderContracts(resourceClass)) {
binding.addAlias(contract)
.in(scope.getName())
.qualifiedBy(CustomAnnotationLiteral.INSTANCE);
}
} else {
binding = Bindings.serviceAsContract(resourceClass);
}
registerBinding.accept(binding);
bindingCache.add(resourceClass);
}
private static Class<? extends Annotation> getScope(Class<?> resourceClass) {
final Collection<Class<? extends Annotation>> scopes =
ReflectionHelper.getAnnotationTypes(resourceClass, Scope.class);
return scopes.isEmpty() ? RequestScoped.class : scopes.iterator().next();
}
/**
* Bind a resource class in a HK2 context.
*
* The bound resource class is internally cached to make sure any sub-sequent attempts to bind the
* class are silently ignored.
* <p>
* WARNING: This version of method is not synchronized as well as the cache is not checked for existing
* bindings before the resource is bound and cached.
* </p>
*
* @param <T> resource class type.
* @param resourceClass resource class to be bound.
* @param providerModel provider model for the class. If not {@code null}, the class
* wil be bound as a contract provider too.
*/
public <T> void unsafeBindResource(Class<T> resourceClass, ContractProvider providerModel) {
ClassBinding<T> descriptor;
if (providerModel != null) {
Class<? extends Annotation> scope = providerModel.getScope();
descriptor = Bindings.serviceAsContract(resourceClass).in(scope);
for (Class contract : providerModel.getContracts()) {
descriptor.addAlias(contract)
.in(scope.getName())
.ranked(providerModel.getPriority(contract))
.qualifiedBy(CustomAnnotationLiteral.INSTANCE);
}
} else {
descriptor = Bindings.serviceAsContract(resourceClass).in(getScope(resourceClass));
}
registerBinding.accept(descriptor);
bindingCache.add(resourceClass);
}
@Override
public ResourceModel getResourceModel() {
return this.resourceModel;
}
/**
* Set the {@link ResourceModel resource mode} of the application associated with this context.
* @param resourceModel Resource model on which the {@link org.glassfish.jersey.server.ApplicationHandler application}
* is based.
*/
public void setResourceModel(ResourceModel resourceModel) {
this.resourceModel = resourceModel;
}
}