2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
21 package org.openecomp.policy.controlloop.guard.compiler;
24 import java.io.InputStream;
25 import java.util.HashSet;
26 import java.util.List;
29 import org.openecomp.policy.controlloop.compiler.CompilerException;
30 import org.openecomp.policy.controlloop.compiler.ControlLoopCompilerCallback;
31 import org.openecomp.policy.controlloop.policy.guard.Constraint;
32 import org.openecomp.policy.controlloop.policy.guard.ControlLoopGuard;
33 import org.openecomp.policy.controlloop.policy.guard.GuardPolicy;
34 import org.yaml.snakeyaml.Yaml;
35 import org.yaml.snakeyaml.constructor.Constructor;
37 public class ControlLoopGuardCompiler {
39 private ControlLoopGuardCompiler(){
40 // Private Constructor
43 public static ControlLoopGuard compile(ControlLoopGuard cLGuard, ControlLoopCompilerCallback callback) throws CompilerException {
45 // Ensure ControlLoopGuard has at least one guard policies
47 validateControlLoopGuard(cLGuard, callback);
49 // Ensure each guard policy has at least one constraints and all guard policies are unique
51 validateGuardPolicies(cLGuard.getGuards(), callback);
53 // Ensure constraints for each guard policy are unique
55 validateConstraints(cLGuard.getGuards(), callback);
60 public static ControlLoopGuard compile(InputStream yamlSpecification, ControlLoopCompilerCallback callback) throws CompilerException {
61 Yaml yaml = new Yaml(new Constructor(ControlLoopGuard.class));
62 Object obj = yaml.load(yamlSpecification);
64 throw new CompilerException("Could not parse yaml specification.");
66 if (! (obj instanceof ControlLoopGuard)) {
67 throw new CompilerException("Yaml could not parse specification into required ControlLoopGuard object");
69 return ControlLoopGuardCompiler.compile((ControlLoopGuard) obj, callback);
72 private static void validateControlLoopGuard(ControlLoopGuard cLGuard, ControlLoopCompilerCallback callback) throws CompilerException {
73 if (cLGuard == null) {
74 if (callback != null) {
75 callback.onError("ControlLoop Guard cannot be null");
77 throw new CompilerException("ControlLoop Guard cannot be null");
79 if (cLGuard.getGuard() == null && callback != null) {
80 callback.onError("Guard version cannot be null");
82 if (cLGuard.getGuards() == null) {
83 if (callback != null) {
84 callback.onError("ControlLoop Guard should have at least one guard policies");
86 } else if (cLGuard.getGuards().isEmpty() && callback != null) {
87 callback.onError("ControlLoop Guard should have at least one guard policies");
91 private static void validateGuardPolicies(List<GuardPolicy> policies, ControlLoopCompilerCallback callback) throws CompilerException {
92 if (policies == null) {
93 if (callback != null) {
94 callback.onError("Guard policies should not be null");
96 throw new CompilerException("Guard policies should not be null");
99 // Ensure all guard policies are unique
101 Set<GuardPolicy> newSet = new HashSet<>(policies);
102 if (newSet.size() != policies.size() && callback != null) {
103 callback.onWarning("There are duplicate guard policies");
106 // Ensure each guard policy has at least one constraints
108 for (GuardPolicy policy : policies) {
109 if (policy.getLimit_constraints() == null || policy.getLimit_constraints().isEmpty()) {
110 if (callback != null) {
111 callback.onError("Guard policy " + policy.getName() + " does not have any limit constraint");
113 throw new CompilerException("Guard policy " + policy.getName() + " does not have any limit constraint");
118 private static void validateConstraints(List<GuardPolicy> policies, ControlLoopCompilerCallback callback) throws CompilerException {
119 if (policies == null) {
120 if (callback != null) {
121 callback.onError("Guard policies should not be null");
123 throw new CompilerException("Guard policies should not be null");
125 for (GuardPolicy policy : policies) {
126 Set<Constraint> newSet = new HashSet<>(policy.getLimit_constraints());
127 if (newSet.size() != policy.getLimit_constraints().size() && callback != null) {
128 callback.onWarning("Guard policy " + policy.getName() + " has duplicate limit constraints");