diff options
Diffstat (limited to 'ONAP-ControlloopPolicy/src/main/java/org/onap/policy/controlloop/guard/compiler/ControlLoopGuardCompiler.java')
-rw-r--r-- | ONAP-ControlloopPolicy/src/main/java/org/onap/policy/controlloop/guard/compiler/ControlLoopGuardCompiler.java | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/ONAP-ControlloopPolicy/src/main/java/org/onap/policy/controlloop/guard/compiler/ControlLoopGuardCompiler.java b/ONAP-ControlloopPolicy/src/main/java/org/onap/policy/controlloop/guard/compiler/ControlLoopGuardCompiler.java new file mode 100644 index 000000000..de5b47641 --- /dev/null +++ b/ONAP-ControlloopPolicy/src/main/java/org/onap/policy/controlloop/guard/compiler/ControlLoopGuardCompiler.java @@ -0,0 +1,133 @@ +/*- + * ============LICENSE_START======================================================= + * ONAP Policy Engine + * ================================================================================ + * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * 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. + * ============LICENSE_END========================================================= + */ + +package org.onap.policy.controlloop.guard.compiler; + + +import java.io.InputStream; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +import org.onap.policy.controlloop.compiler.CompilerException; +import org.onap.policy.controlloop.compiler.ControlLoopCompilerCallback; +import org.onap.policy.controlloop.policy.guard.Constraint; +import org.onap.policy.controlloop.policy.guard.ControlLoopGuard; +import org.onap.policy.controlloop.policy.guard.GuardPolicy; +import org.yaml.snakeyaml.Yaml; +import org.yaml.snakeyaml.constructor.Constructor; + +public class ControlLoopGuardCompiler { + + private ControlLoopGuardCompiler(){ + // Private Constructor + } + + public static ControlLoopGuard compile(ControlLoopGuard cLGuard, ControlLoopCompilerCallback callback) throws CompilerException { + // + // Ensure ControlLoopGuard has at least one guard policies + // + validateControlLoopGuard(cLGuard, callback); + // + // Ensure each guard policy has at least one constraints and all guard policies are unique + // + validateGuardPolicies(cLGuard.getGuards(), callback); + // + // Ensure constraints for each guard policy are unique + // + validateConstraints(cLGuard.getGuards(), callback); + + return cLGuard; + } + + public static ControlLoopGuard compile(InputStream yamlSpecification, ControlLoopCompilerCallback callback) throws CompilerException { + Yaml yaml = new Yaml(new Constructor(ControlLoopGuard.class)); + Object obj = yaml.load(yamlSpecification); + if (obj == null) { + throw new CompilerException("Could not parse yaml specification."); + } + if (! (obj instanceof ControlLoopGuard)) { + throw new CompilerException("Yaml could not parse specification into required ControlLoopGuard object"); + } + return ControlLoopGuardCompiler.compile((ControlLoopGuard) obj, callback); + } + + private static void validateControlLoopGuard(ControlLoopGuard cLGuard, ControlLoopCompilerCallback callback) throws CompilerException { + if (cLGuard == null) { + if (callback != null) { + callback.onError("ControlLoop Guard cannot be null"); + } + throw new CompilerException("ControlLoop Guard cannot be null"); + } + if (cLGuard.getGuard() == null && callback != null) { + callback.onError("Guard version cannot be null"); + } + if (cLGuard.getGuards() == null) { + if (callback != null) { + callback.onError("ControlLoop Guard should have at least one guard policies"); + } + } else if (cLGuard.getGuards().isEmpty() && callback != null) { + callback.onError("ControlLoop Guard should have at least one guard policies"); + } + } + + private static void validateGuardPolicies(List<GuardPolicy> policies, ControlLoopCompilerCallback callback) throws CompilerException { + if (policies == null) { + if (callback != null) { + callback.onError("Guard policies should not be null"); + } + throw new CompilerException("Guard policies should not be null"); + } + // + // Ensure all guard policies are unique + // + Set<GuardPolicy> newSet = new HashSet<>(policies); + if (newSet.size() != policies.size() && callback != null) { + callback.onWarning("There are duplicate guard policies"); + } + // + // Ensure each guard policy has at least one constraints + // + for (GuardPolicy policy : policies) { + if (policy.getLimit_constraints() == null || policy.getLimit_constraints().isEmpty()) { + if (callback != null) { + callback.onError("Guard policy " + policy.getName() + " does not have any limit constraint"); + } + throw new CompilerException("Guard policy " + policy.getName() + " does not have any limit constraint"); + } + } + } + + private static void validateConstraints(List<GuardPolicy> policies, ControlLoopCompilerCallback callback) throws CompilerException { + if (policies == null) { + if (callback != null) { + callback.onError("Guard policies should not be null"); + } + throw new CompilerException("Guard policies should not be null"); + } + for (GuardPolicy policy : policies) { + Set<Constraint> newSet = new HashSet<>(policy.getLimit_constraints()); + if (newSet.size() != policy.getLimit_constraints().size() && callback != null) { + callback.onWarning("Guard policy " + policy.getName() + " has duplicate limit constraints"); + } + } + } + +} |