/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file 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 "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.apache.camel.component.restlet;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.restlet.Restlet;
import org.restlet.data.Method;
import org.restlet.data.Request;
import org.restlet.data.Response;
import org.restlet.data.Status;
/**
* A simple router that routes requests to target Restlets based on method.
*
* @version $Revision: 730276 $
*/
class MethodBasedRouter extends Restlet {
private static final Log LOG = LogFactory.getLog(MethodBasedRouter.class);
private String uriPattern;
private Map<Method, Restlet> routes = new ConcurrentHashMap<Method, Restlet>();
private AtomicBoolean hasBeenAttachedFlag = new AtomicBoolean(false);
MethodBasedRouter(String uriPattern) {
this.uriPattern = uriPattern;
}
@Override
public void handle(Request request, Response response) {
if (LOG.isDebugEnabled()) {
LOG.debug("MethodRouter (" + uriPattern + ") received request method: "
+ request.getMethod());
}
Restlet target = routes.get(request.getMethod());
if (target != null) {
target.handle(request, response);
} else {
if (LOG.isDebugEnabled()) {
LOG.debug("No route for request method: " + request.getMethod());
}
response.setStatus(Status.CLIENT_ERROR_NOT_FOUND);
}
}
void addRoute(Method method, Restlet target) {
routes.put(method, target);
}
void removeRoute(Method method) {
routes.remove(method);
}
/**
* This method does "test-and-set" on the underlying flag that indicates
* whether this router restlet has been attached to a server or not. It
* is the caller's responsibility to perform the "attach" when this method
* returns false.
*
* @return true only this method is called the first time.
*/
boolean hasBeenAttached() {
return hasBeenAttachedFlag.getAndSet(true);
}
}