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/*
* 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.tuscany.sca.binding.http.operationselector.provider;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.apache.tuscany.sca.common.http.HTTPContext;
import org.apache.tuscany.sca.interfacedef.Interface;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.invocation.Interceptor;
import org.apache.tuscany.sca.invocation.Invoker;
import org.apache.tuscany.sca.invocation.Message;
import org.apache.tuscany.sca.runtime.RuntimeEndpoint;
import org.oasisopen.sca.ServiceRuntimeException;
/**
* HTTP Binding Default operation selector, which would map
* http method (GET, PUT, POST, DELETE) to operations matching
* those name. It also supports plain servlet using 'service'
* to provide the component functionality.
*
* @version $Rev$ $Date$
*/
public class HTTPDefaultServiceOperationSelectorInterceptor implements Interceptor {
private Invoker next;
private List<Operation> operations;
public HTTPDefaultServiceOperationSelectorInterceptor(RuntimeEndpoint endpoint) {
Interface serviceInterface = endpoint.getService().getInterfaceContract().getInterface();
this.operations = serviceInterface.getOperations();
}
@Override
public Message invoke(Message msg) {
HTTPContext context = msg.getBindingContext();
HttpServletRequest request = context.getHttpRequest();
Operation operation = findOperation(request.getMethod());
if(operation == null) {
operation = findOperation("service");
}
if(operation == null) {
throw new ServiceRuntimeException("No matching operation for " + request.getMethod());
}
msg.setOperation(operation);
return next.invoke(msg);
}
@Override
public void setNext(Invoker next) {
this.next = next;
}
@Override
public Invoker getNext() {
return next;
}
/**
* Find the operation from the component service contract
* @param componentService
* @param method
* @return
*/
private Operation findOperation(String method) {
if (method.contains(".")) {
method = method.substring(method.lastIndexOf(".") + 1);
}
Operation result = null;
for (Operation o : operations) {
if (o.isDynamic())
return o;
if (o.getName().equalsIgnoreCase(method)) {
result = o;
break;
}
}
return result;
}
}
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