1 files changed, 85 insertions, 0 deletions
diff --git a/appc-client/client-kit/src/main/java/org/openecomp/appc/client/lcm/impl/business/RPCInvocator.java b/appc-client/client-kit/src/main/java/org/openecomp/appc/client/lcm/impl/business/RPCInvocator.java
new file mode 100644
index 000000000..97ff1c46f
--- /dev/null
+++ b/appc-client/client-kit/src/main/java/org/openecomp/appc/client/lcm/impl/business/RPCInvocator.java
@@ -0,0 +1,85 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017 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.
+ * 
+ * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.appc.client.lcm.impl.business;
+
+import org.openecomp.appc.RPC;
+import org.openecomp.appc.client.lcm.api.ResponseHandler;
+import org.openecomp.appc.client.lcm.exceptions.AppcClientBusinessException;
+import org.openecomp.appc.client.lcm.exceptions.AppcClientException;
+import org.openecomp.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);
+    }
+}