2 * ===============================LICENSE_START======================================
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4 * ================================================================================
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5 * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
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6 * ================================================================================
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7 * Licensed under the Apache License, Version 2.0 (the "License");
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8 * you may not use this file except in compliance with the License.
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9 * You may obtain a copy of the License at
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11 * http://www.apache.org/licenses/LICENSE-2.0
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13 * Unless required by applicable law or agreed to in writing, software
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14 * distributed under the License is distributed on an "AS IS" BASIS,
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15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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16 * See the License for the specific language governing permissions and
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17 * limitations under the License.
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18 * ============================LICENSE_END===========================================
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21 package org.openecomp.dcae.apod.analytics.common.service.processor;
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23 import org.openecomp.dcae.apod.analytics.common.utils.MessageProcessorUtils.MessageProcessorFunction;
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25 import java.util.List;
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27 import static org.openecomp.dcae.apod.analytics.common.utils.MessageProcessorUtils.computeMessageProcessorChain;
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31 * A Generic Message Processor which passes the {@link ProcessorContext} from first to second
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32 * {@link MessageProcessor}
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35 * @param <P> Processor Context sub classes
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37 * @author Rajiv Singla . Creation Date: 11/8/2016.
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39 public class GenericMessageChainProcessor<P extends ProcessorContext> {
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41 private final List<? extends MessageProcessor<P>> messageProcessors;
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42 private final P initialProcessorContext;
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44 public GenericMessageChainProcessor(List<? extends MessageProcessor<P>> messageProcessors,
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45 P initialProcessorContext) {
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46 this.messageProcessors = messageProcessors;
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47 this.initialProcessorContext = initialProcessorContext;
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51 * Process a processor chain
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53 * @return Processor Context after processing the processor chain
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55 public P processChain() {
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57 final MessageProcessorFunction<P> messageProcessorFunction =
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58 new MessageProcessorFunction<P>() {
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60 public <M extends MessageProcessor<P>> P apply(P context, M processor) {
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61 return processor.apply(context);
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65 return computeMessageProcessorChain(messageProcessors, initialProcessorContext,
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66 messageProcessorFunction);
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