2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2019 Nokia Intellectual Property. All rights
7 * ================================================================================
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 * ============LICENSE_END============================================
20 * ===================================================================
24 package org.onap.clamp.clds.sdc.controller.installer;
26 import java.util.LinkedList;
27 import java.util.List;
29 import java.util.stream.Collectors;
31 import org.springframework.stereotype.Component;
34 public class ChainGenerator {
40 * Get list of microservices chain.
42 * @param input A set of microservices
43 * @return The list of microservice chained
45 public List<BlueprintMicroService> getChainOfMicroServices(Set<BlueprintMicroService> input) {
46 LinkedList<BlueprintMicroService> returnList = new LinkedList<>();
47 if (preValidate(input)) {
48 LinkedList<BlueprintMicroService> theList = new LinkedList<>();
49 for (BlueprintMicroService ms : input) {
50 insertNodeTemplateIntoChain(ms, theList);
52 if (postValidate(theList)) {
59 private boolean preValidate(Set<BlueprintMicroService> input) {
60 List<BlueprintMicroService> noInputs = input.stream().filter(ms -> "".equals(ms.getInputFrom()))
61 .collect(Collectors.toList());
62 return noInputs.size() == 1;
65 private boolean postValidate(LinkedList<BlueprintMicroService> microServices) {
66 for (int i = 1; i < microServices.size() - 1; i++) {
67 BlueprintMicroService prev = microServices.get(i - 1);
68 BlueprintMicroService current = microServices.get(i);
69 if (!current.getInputFrom().equals(prev.getName())) {
76 private void insertNodeTemplateIntoChain(BlueprintMicroService microServicetoInsert,
77 LinkedList<BlueprintMicroService> chainOfMicroServices) {
79 for (int i = 0; i < chainOfMicroServices.size(); i++) {
80 BlueprintMicroService current = chainOfMicroServices.get(i);
81 if (microServicetoInsert.getName().equals(current.getInputFrom())) {
84 } else if (current.getName().equals(microServicetoInsert.getInputFrom())) {
89 chainOfMicroServices.add(insertIndex, microServicetoInsert);