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* distributed with this work for additional information
* regarding copyright ownership. The ASF 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
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* KIND, either express or implied. See the License for the
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package org.apache.wink.osgi;
import java.util.HashSet;
import java.util.Set;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.ws.rs.core.Application;
import javax.ws.rs.ext.RuntimeDelegate;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.ReferenceCardinality;
import org.apache.felix.scr.annotations.ReferencePolicy;
import org.apache.felix.scr.annotations.Service;
import org.apache.wink.common.internal.runtime.RuntimeDelegateImpl;
import org.apache.wink.osgi.internal.DummyRuntimeDelegate;
import org.apache.wink.osgi.internal.ThreadRootResourceDeploymentConfiguration;
import org.apache.wink.server.internal.RequestProcessor;
import org.apache.wink.server.utils.RegistrationUtils.InnerApplication;
import org.osgi.service.component.ComponentContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
* This component listens to registrations of services of type <code>java.lang.Object</code>
* with the property <code>javax.ws.rs</code> set to true and registers them with the
* Wink RequestProcessor. Root resources and providers that are not exposed as such a service
* can be registered by invoking the bindComponent method.
*
*/
@Component
@Reference(name="component", referenceInterface=Object.class, target="(javax.ws.rs=true)",
cardinality=ReferenceCardinality.OPTIONAL_MULTIPLE, policy=ReferencePolicy.DYNAMIC)
@Service(WinkRequestProcessor.class)
public class WinkRequestProcessor {
private final static Logger log = LoggerFactory.getLogger(WinkRequestProcessor.class);
private RequestProcessor requestProcessor;
private Set<Object> components = new HashSet<Object>();
private boolean requestProcessorOutdated = false;
/**
* Dispatches the request and fills the response (even with an error
* message.
*
* @param request AS or mock request
* @param response AS or mock response
*/
public void handleRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException {
ensureNotOutdated();
requestProcessor.handleRequest(request, response);
}
/**
* Dispatches the request and fills the response (even with an error
* message using the spcified root resource instance. Note that any
* @Path annotation on the root resource class as well as methods with
* auch an annotation are ignored.
*
* @param request AS or mock request
* @param response AS or mock response
* @param resource the root resource instance to be used
*/
public void handleRequest(HttpServletRequest request, HttpServletResponse response,
Object resource)
throws ServletException {
ensureNotOutdated();
ThreadRootResourceDeploymentConfiguration.threadLocalRootResource.set(resource);
requestProcessor.handleRequest(request, response);
ThreadRootResourceDeploymentConfiguration.threadLocalRootResource.remove();
}
protected void activate(ComponentContext context) {
// hint from http://www.amdatu.org/confluence/display/Amdatu/OSGiification
// dummy RuntimeDelegate
RuntimeDelegate.setInstance(new DummyRuntimeDelegate());
RuntimeDelegate.setInstance(new RuntimeDelegateImpl());
init();
}
protected void deactivate(ComponentContext context) {
components.clear();
requestProcessor = null;
requestProcessorOutdated = false;
}
/**
* @param component
* The new JAX-RS component (root resource or provider) to bind.
*/
public void bindComponent(Object component) {
components.add(component);
if (requestProcessor != null) {
registerComponent(component);
}
}
/**
* @param component
* The new JAX-RS component (root resource or provider) to bind.
*/
public void unbindComponent(Object component) {
components.remove(component);
//since it seems not possible to remove from RequestProcessor
//we need to create a new one, we defer this to prevent
//creation of many new RequestProcessors when unregistering many resources
requestProcessorOutdated = true;
}
/**
* Used in JaxRsFilter to check if the path can be handled by wink
*/
RequestProcessor getRequestProcessor() {
ensureNotOutdated();
return requestProcessor;
}
private void ensureNotOutdated() {
if (requestProcessorOutdated) {
requestProcessorOutdated = false;
synchronized(this) {
init();
}
}
}
private void init() {
ThreadRootResourceDeploymentConfiguration configuration = new ThreadRootResourceDeploymentConfiguration();
configuration.init();
configuration.getProperties().setProperty("wink.rootResource", "none");
requestProcessor = new RequestProcessor(configuration);
for (Object component : components) {
registerComponent(component);
}
}
private void registerComponent(Object component) {
ensureNotOutdated();
Application application = new InnerApplication(component);
requestProcessor.getConfiguration().addApplication(application, false);
components.add(component);
//FIXME: fix this to comply with externalization requirements
//log.info("registered component {}", component);
}
}