| /* |
| * 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.spark.annotations; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.camel.CamelContext; |
| import org.apache.camel.component.spark.RddCallback; |
| import org.apache.spark.api.java.JavaRDDLike; |
| |
| import static java.util.Arrays.asList; |
| import static org.apache.camel.support.ObjectHelper.invokeMethodSafe; |
| import static org.apache.camel.util.ObjectHelper.findMethodsWithAnnotation; |
| |
| class AnnotatedRddCallbackProxy implements RddCallback { |
| |
| private final Object objectWithCallback; |
| |
| private final List<Method> rddCallbacks; |
| |
| private final CamelContext camelContext; |
| |
| AnnotatedRddCallbackProxy(Object objectWithCallback, CamelContext camelContext) { |
| this.objectWithCallback = objectWithCallback; |
| this.camelContext = camelContext; |
| this.rddCallbacks = findMethodsWithAnnotation(objectWithCallback.getClass(), org.apache.camel.component.spark.annotations.RddCallback.class); |
| if (rddCallbacks.size() == 0) { |
| throw new UnsupportedOperationException("Can't find methods annotated with @RddCallback."); |
| } |
| } |
| |
| AnnotatedRddCallbackProxy(Object objectWithCallback) { |
| this(objectWithCallback, null); |
| } |
| |
| @Override |
| public Object onRdd(JavaRDDLike rdd, Object... payloads) { |
| try { |
| List<Object> arguments = new ArrayList<>(payloads.length + 1); |
| arguments.add(rdd); |
| arguments.addAll(asList(payloads)); |
| if (arguments.get(1) == null) { |
| arguments.remove(1); |
| } |
| |
| Method callbackMethod = rddCallbacks.get(0); |
| |
| if (camelContext != null) { |
| for (int i = 1; i < arguments.size(); i++) { |
| arguments.set(i, camelContext.getTypeConverter().convertTo(callbackMethod.getParameterTypes()[i], arguments.get(i))); |
| } |
| } |
| |
| Object[] args = arguments.toArray(new Object[arguments.size()]); |
| return invokeMethodSafe(callbackMethod, objectWithCallback, args); |
| } catch (IllegalAccessException | InvocationTargetException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| } |