/***
* Copyright (c) 2009 Caelum - www.caelum.com.br/opensource
* All rights reserved.
*
* 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 br.com.caelum.vraptor.observer;
import static org.slf4j.LoggerFactory.getLogger;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.event.Event;
import javax.enterprise.event.Observes;
import javax.inject.Inject;
import org.slf4j.Logger;
import br.com.caelum.vraptor.controller.ControllerMethod;
import br.com.caelum.vraptor.controller.ControllerNotFoundHandler;
import br.com.caelum.vraptor.controller.MethodNotAllowedHandler;
import br.com.caelum.vraptor.core.InterceptorStack;
import br.com.caelum.vraptor.core.MethodInfo;
import br.com.caelum.vraptor.core.RequestInfo;
import br.com.caelum.vraptor.events.ControllerMethodDiscovered;
import br.com.caelum.vraptor.events.NewRequest;
import br.com.caelum.vraptor.events.StackStarting;
import br.com.caelum.vraptor.http.UrlToControllerTranslator;
import br.com.caelum.vraptor.http.route.ControllerNotFoundException;
import br.com.caelum.vraptor.http.route.MethodNotAllowedException;
/**
* Looks up the {@link ControllerMethod} for a specific request and start {@link
* InterceptorStack} if it was found, otherwise delegates for the 404 component.
*
* @author Guilherme Silveira
* @author Cecilia Fernandes
* @author Rodrigo Turini
*/
@ApplicationScoped
public class RequestHandlerObserver {
private static final Logger LOGGER = getLogger(RequestHandlerObserver.class);
private final UrlToControllerTranslator translator;
private final ControllerNotFoundHandler controllerNotFoundHandler;
private final MethodNotAllowedHandler methodNotAllowedHandler;
private final Event<ControllerMethodDiscovered> controllerMethodEvent;
private final Event<StackStarting> stackStartingEvent;
private InterceptorStack interceptorStack;
/**
* @deprecated CDI eyes only
*/
protected RequestHandlerObserver() {
this(null, null, null, null, null, null);
}
@Inject
public RequestHandlerObserver(UrlToControllerTranslator translator,
ControllerNotFoundHandler controllerNotFoundHandler, MethodNotAllowedHandler methodNotAllowedHandler,
Event<ControllerMethodDiscovered> event, InterceptorStack interceptorStack,
Event<StackStarting> stackStartingEvent) {
this.translator = translator;
this.methodNotAllowedHandler = methodNotAllowedHandler;
this.controllerNotFoundHandler = controllerNotFoundHandler;
this.controllerMethodEvent = event;
this.interceptorStack = interceptorStack;
this.stackStartingEvent = stackStartingEvent;
}
public void handle(@Observes NewRequest event, MethodInfo methodInfo, RequestInfo requestInfo) {
try {
ControllerMethod method = translator.translate(requestInfo);
methodInfo.setControllerMethod(method);
controllerMethodEvent.fire(new ControllerMethodDiscovered(method));
stackStartingEvent.fire(new StackStarting(method));
interceptorStack.start();
} catch (ControllerNotFoundException e) {
controllerNotFoundHandler.couldntFind(requestInfo);
} catch (MethodNotAllowedException e) {
LOGGER.debug(e.getMessage(), e);
methodNotAllowedHandler.deny(requestInfo, e.getAllowedMethods());
}
}
}