org.sakaiproject.resteasy.ResteasyK2Bootstrap.java Source code

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Here is the source code for org.sakaiproject.resteasy.ResteasyK2Bootstrap.java

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/*
 * Licensed to the Sakai Foundation (SF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The SF licenses this file
 * to you 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.sakaiproject.resteasy;

import java.util.Map;

import javax.servlet.ServletContextEvent;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap;
import org.jboss.resteasy.spi.Registry;
import org.sakaiproject.kernel.api.KernelManager;
import org.sakaiproject.kernel.api.RegistryService;
import org.sakaiproject.kernel.api.rest.Documentable;
import org.sakaiproject.kernel.api.rest.JaxRsPrototypeProvider;
import org.sakaiproject.kernel.api.rest.JaxRsSingletonProvider;

import static org.sakaiproject.kernel.api.rest.JaxRsSingletonProvider.JAXRS_SINGLETON_REGISTRY;
import static org.sakaiproject.kernel.api.rest.JaxRsPrototypeProvider.JAXRS_PROTOTYPE_REGISTRY;

/**
 * Bootstraps the RestEasy JAX-RS implementation, using resources registered with the
 * sakai kernel's JaxRsResourceProvider.JAXRS_REGISTRY registry.
 */
public class ResteasyK2Bootstrap extends ResteasyBootstrap {
    /**
     *
     */
    private static final Log LOG = LogFactory.getLog(ResteasyBootstrap.class);
    /**
     *
     */
    private JaxRsSingletonRegistryListener singletonListener;
    /**
     *
     */
    private JaxRsPrototypeRegistryListener prototypeListener;
    /**
     * The default documentation bean
     */
    private RootRestEasyDocumentation defaultDocumentation;

    /**
     * {@inheritDoc}
     *
     * @see org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap#contextInitialized(javax.servlet.ServletContextEvent)
     */
    public void contextInitialized(ServletContextEvent event) {
        super.contextInitialized(event);
        Registry restEasyRegistry = (Registry) event.getServletContext().getAttribute(Registry.class.getName());

        defaultDocumentation = (RootRestEasyDocumentation) event.getServletContext()
                .getAttribute(Documentable.class.getName());
        if (defaultDocumentation == null) {
            defaultDocumentation = new RootRestEasyDocumentation();
            event.getServletContext().setAttribute(Documentable.class.getName(), defaultDocumentation);
        }

        // Add listeners to keep the kernel registries aligned with the resteasy
        // registry
        singletonListener = new JaxRsSingletonRegistryListener(restEasyRegistry, defaultDocumentation);
        prototypeListener = new JaxRsPrototypeRegistryListener(restEasyRegistry, defaultDocumentation);

        // Add all of the resources in our JAX-RS providers to the resteasy registry
        KernelManager km = new KernelManager();
        RegistryService registryService = km.getService(RegistryService.class);
        org.sakaiproject.kernel.api.Registry<String, JaxRsSingletonProvider> jaxRsSingletonRegistry = registryService
                .getRegistry(JAXRS_SINGLETON_REGISTRY);
        org.sakaiproject.kernel.api.Registry<String, JaxRsPrototypeProvider> jaxRsPrototypeRegistry = registryService
                .getRegistry(JAXRS_PROTOTYPE_REGISTRY);

        // Sync the JAX-RS implementation's registry with the kernel's registry
        syncRestEasyRegistry(restEasyRegistry, jaxRsSingletonRegistry, jaxRsPrototypeRegistry);

        // Listen for changes to the kernel registry
        jaxRsSingletonRegistry.addListener(singletonListener);
        jaxRsPrototypeRegistry.addListener(prototypeListener);

        LOG.info("Added JAX-RS registry listener for updates to " + jaxRsSingletonRegistry);
    }

    /**
     * {@inheritDoc}
     *
     * @see org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap#contextDestroyed(javax.servlet.ServletContextEvent)
     */
    public void contextDestroyed(ServletContextEvent event) {
    }

    /**
     * @param restEasyRegistry
     *          the registry to sync to.
     * @param jaxRsSingletonRegistry
     *          the JAXRS Singleton Registry.
     * @param jaxRsPrototypeRegistry
     *          the JAXRS Prototype Registry.
     */
    protected void syncRestEasyRegistry(Registry restEasyRegistry,
            org.sakaiproject.kernel.api.Registry<String, JaxRsSingletonProvider> jaxRsSingletonRegistry,
            org.sakaiproject.kernel.api.Registry<String, JaxRsPrototypeProvider> jaxRsPrototypeRegistry) {
        LOG.info("Updating " + restEasyRegistry);
        Map<String, JaxRsSingletonProvider> singletonProvidersMap = jaxRsSingletonRegistry.getMap();
        for (JaxRsSingletonProvider provider : singletonProvidersMap.values()) {

            try {
                restEasyRegistry.removeRegistrations(provider.getJaxRsSingleton().getClass());
                defaultDocumentation.removeRegistration(provider.getJaxRsSingleton().getClass());
            } catch (Exception e) {
                LOG.warn(e);
            }
            LOG.info("Added JAX-RS singleton: " + provider.getJaxRsSingleton());
            restEasyRegistry.addSingletonResource(provider.getJaxRsSingleton());
            defaultDocumentation.addRegistration(provider.getJaxRsSingleton());
        }
        Map<String, JaxRsPrototypeProvider> prototypeProvidersMap = jaxRsPrototypeRegistry.getMap();
        for (JaxRsPrototypeProvider provider : prototypeProvidersMap.values()) {
            try {
                defaultDocumentation.removeRegistration(provider.getJaxRsPrototype().getClass());
                restEasyRegistry.removeRegistrations(provider.getJaxRsPrototype());
            } catch (Exception e) {
                LOG.warn(e);
            }
            LOG.info("Added JAX-RS prototype: " + provider.getJaxRsPrototype());
            restEasyRegistry.addPerRequestResource(provider.getJaxRsPrototype());
            defaultDocumentation.addRegistration(provider.getJaxRsPrototype());
        }
    }
}