X-Git-Url: https://gerrit.onap.org/r/gitweb?a=blobdiff_plain;f=artifactbroker%2Fmain%2Fsrc%2Fmain%2Fjava%2Forg%2Fonap%2Fpolicy%2Fdistribution%2Fmain%2Fparameters%2FDistributionParameterHandler.java;fp=artifactbroker%2Fmain%2Fsrc%2Fmain%2Fjava%2Forg%2Fonap%2Fpolicy%2Fdistribution%2Fmain%2Fparameters%2FDistributionParameterHandler.java;h=dc7297856f89894cb37fe86d66ef8171b828da7c;hb=94d7d990ac85143fd3605c9a094082592d554e2a;hp=0000000000000000000000000000000000000000;hpb=20cc990e09f61a75375b2f39a0b7d9b790f37ccd;p=multicloud%2Fframework.git diff --git a/artifactbroker/main/src/main/java/org/onap/policy/distribution/main/parameters/DistributionParameterHandler.java b/artifactbroker/main/src/main/java/org/onap/policy/distribution/main/parameters/DistributionParameterHandler.java new file mode 100644 index 0000000..dc72978 --- /dev/null +++ b/artifactbroker/main/src/main/java/org/onap/policy/distribution/main/parameters/DistributionParameterHandler.java @@ -0,0 +1,85 @@ +/*- + * ============LICENSE_START======================================================= + * Copyright (C) 2018 Ericsson. 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. + * + * SPDX-License-Identifier: Apache-2.0 + * ============LICENSE_END========================================================= + */ + +package org.onap.policy.distribution.main.parameters; + +import com.google.gson.Gson; +import com.google.gson.GsonBuilder; + +import java.io.FileReader; + +import org.onap.policy.common.logging.flexlogger.FlexLogger; +import org.onap.policy.common.logging.flexlogger.Logger; +import org.onap.policy.common.parameters.GroupValidationResult; +import org.onap.policy.distribution.main.PolicyDistributionException; +import org.onap.policy.distribution.main.startstop.DistributionCommandLineArguments; + +/** + * This class handles reading, parsing and validating of policy distribution parameters from JSON files. + */ +public class DistributionParameterHandler { + private static final Logger LOGGER = FlexLogger.getLogger(DistributionParameterHandler.class); + + /** + * Read the parameters from the parameter file. + * + * @param arguments the arguments passed to policy distribution + * @return the parameters read from the configuration file + * @throws PolicyDistributionException on parameter exceptions + */ + public DistributionParameterGroup getParameters(final DistributionCommandLineArguments arguments) + throws PolicyDistributionException { + DistributionParameterGroup distributionParameterGroup = null; + + // Read the parameters + try { + // Read the parameters from JSON using Gson + final Gson gson = new GsonBuilder() + .create(); + distributionParameterGroup = gson.fromJson(new FileReader(arguments.getFullConfigurationFilePath()), + DistributionParameterGroup.class); + } catch (final Exception e) { + final String errorMessage = "error reading parameters from \"" + arguments.getConfigurationFilePath() + + "\"\n" + "(" + e.getClass().getSimpleName() + "):" + e.getMessage(); + LOGGER.error(errorMessage, e); + throw new PolicyDistributionException(errorMessage, e); + } + + // The JSON processing returns null if there is an empty file + if (distributionParameterGroup == null) { + final String errorMessage = "no parameters found in \"" + arguments.getConfigurationFilePath() + "\""; + LOGGER.error(errorMessage); + throw new PolicyDistributionException(errorMessage); + } + + // validate the parameters + final GroupValidationResult validationResult = distributionParameterGroup.validate(); + if (!validationResult.isValid()) { + String returnMessage = + "validation error(s) on parameters from \"" + arguments.getConfigurationFilePath() + "\"\n"; + returnMessage += validationResult.getResult(); + + LOGGER.error(returnMessage); + throw new PolicyDistributionException(returnMessage); + } + + return distributionParameterGroup; + } +}