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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.core.invocation.impl;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.concurrent.Future;
import javax.xml.ws.AsyncHandler;
import javax.xml.ws.Response;
import org.apache.tuscany.sca.invocation.MessageFactory;
import org.oasisopen.sca.ServiceReference;
public class AsyncJDKInvocationHandler extends JDKInvocationHandler {
private static final long serialVersionUID = 1L;
public AsyncJDKInvocationHandler(MessageFactory messageFactory, ServiceReference<?> callableReference) {
super(messageFactory, callableReference);
}
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
if (isAsyncCallback(method)) {
return doInvokeAsyncCallback(proxy, method, args);
} else if (isAsyncPoll(method)) {
return doInvokeAsyncPoll(proxy, method, args);
} else {
return super.invoke(proxy, method, args);
}
}
protected boolean isAsyncCallback(Method method) {
if (method.getName().endsWith("Async") && (method.getReturnType().isAssignableFrom(Future.class))) {
if (method.getParameterTypes().length > 0) {
return method.getParameterTypes()[method.getParameterTypes().length-1].isAssignableFrom(AsyncHandler.class);
}
}
return false;
}
protected boolean isAsyncPoll(Method method) {
return method.getName().endsWith("Async") && (method.getReturnType().isAssignableFrom(Response.class));
}
protected AsyncResponse doInvokeAsyncPoll(Object proxy, Method asyncMethod, Object[] args) {
Object response;
boolean isException;
try {
response = super.invoke(proxy, getNonAsyncMethod(asyncMethod), args);
isException = false;
} catch (Throwable e) {
response = e;
isException = true;
}
return new AsyncResponse(response, isException);
}
private Object doInvokeAsyncCallback(Object proxy, Method asyncMethod, Object[] args) {
AsyncHandler handler = (AsyncHandler)args[args.length-1];
Response response = doInvokeAsyncPoll(proxy,asyncMethod,Arrays.copyOf(args, args.length-1));
handler.handleResponse(response);
return null;
}
protected Method getNonAsyncMethod(Method asyncMethod) {
String methodName = asyncMethod.getName().substring(0, asyncMethod.getName().length()-5);
for (Method m : businessInterface.getMethods()) {
if (methodName.equals(m.getName())) {
return m;
}
}
throw new IllegalStateException("No non-async method matching async method " + asyncMethod.getName());
}
}
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