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/*-
* ============LICENSE_START=======================================================
* ONAP : APPC
* ================================================================================
* Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Copyright (C) 2017 Amdocs
* =============================================================================
* 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.
*
* ============LICENSE_END=========================================================
*/
package org.onap.appc.client.lcm.impl.business;
import org.onap.appc.RPC;
import org.onap.appc.client.lcm.api.ResponseHandler;
import org.onap.appc.client.lcm.exceptions.AppcClientBusinessException;
import org.onap.appc.client.lcm.exceptions.AppcClientException;
import org.onap.appc.client.lcm.exceptions.AppcClientInternalException;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
class RPCInvocator implements InvocationHandler {
private final LCMRequestProcessor lcmRequestProcessor;
RPCInvocator(LCMRequestProcessor lcmRequestProcessor) {
this.lcmRequestProcessor = lcmRequestProcessor;
}
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
if (isLCMRequest(method)) {
try {
return invokeImpl(method, args);
}
catch (AppcClientInternalException | AppcClientBusinessException e) {
throw new AppcClientException(e);
}
} else {
// Delegate non-RPC Object's methods (hashCode/equals/etc) to the proxy instance itself
return method.invoke(proxy, args);
}
}
private <T> T invokeImpl(Method method, Object[] args) throws AppcClientInternalException, AppcClientBusinessException {
Object rpcInput = args[0];
RPC annotation = method.getAnnotation(RPC.class);
String rpcName = annotation.name();
@SuppressWarnings("unchecked")
Class<T> rpcOutputType = (Class<T>) annotation.outputType();
T result = null;
if (isAsync(method)) {
@SuppressWarnings("unchecked")
ResponseHandler<T> handler = (ResponseHandler<T>) args[1];
lcmRequestProcessor.processAsync(rpcInput, rpcName, rpcOutputType, handler);
}
else {
result = lcmRequestProcessor.processSync(rpcInput, rpcName, rpcOutputType);
}
return result;
}
private boolean isLCMRequest(Method method) {
return method.isAnnotationPresent(RPC.class);
}
private boolean isAsync(Method method) {
return method.getReturnType().equals(Void.TYPE);
}
}
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