diff options
Diffstat (limited to 'src/main/java/org/onap/dcae/configuration/ConfigUpdater.java')
-rw-r--r-- | src/main/java/org/onap/dcae/configuration/ConfigUpdater.java | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/src/main/java/org/onap/dcae/configuration/ConfigUpdater.java b/src/main/java/org/onap/dcae/configuration/ConfigUpdater.java new file mode 100644 index 00000000..eb1a1a5f --- /dev/null +++ b/src/main/java/org/onap/dcae/configuration/ConfigUpdater.java @@ -0,0 +1,95 @@ +/*- + * ============LICENSE_START======================================================= + * org.onap.dcaegen2.collectors.ves + * ================================================================================ + * Copyright (C) 2020 Nokia. 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.dcae.configuration; + +import io.vavr.collection.Map; +import io.vavr.control.Option; +import org.json.JSONObject; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class ConfigUpdater { + + private static final Logger log = LoggerFactory.getLogger(ConfigUpdater.class); + private final ConfigFilesFacade configFilesFacade; + private final Runnable applicationRestarter; + private boolean isApplicationRestartNeeded; + + public ConfigUpdater(ConfigFilesFacade configFilesFacade, Runnable applicationRestarter) { + this.configFilesFacade = configFilesFacade; + this.applicationRestarter = applicationRestarter; + this.isApplicationRestartNeeded = false; + } + + public synchronized void updateConfig(Option<JSONObject> appConfig) { + appConfig.peek(this::handleUpdate).onEmpty(logSkipMessage()); + } + + private Runnable logSkipMessage() { + return () -> log.info("Skipping dynamic configuration"); + } + + private void handleUpdate(JSONObject appConfig) { + updatePropertiesIfChanged(appConfig); + updateDmaapConfigIfChanged(appConfig); + restartApplicationIfNeeded(); + } + + private void updatePropertiesIfChanged(JSONObject appConfig) { + Map<String, String> newProperties = ConfigParsing.getProperties(appConfig); + Map<String, String> oldProperties = configFilesFacade.readCollectorProperties().get(); + + if (!areCommonPropertiesSame(oldProperties, newProperties)) { + configFilesFacade.writeProperties(newProperties); + isApplicationRestartNeeded = true; + } + } + + private boolean areCommonPropertiesSame(Map<String, String> oldProperties, Map<String, String> newProperties) { + Map<String, String> filteredOldProperties = filterIntersectingKeys(oldProperties, newProperties); + return filteredOldProperties.equals(newProperties); + } + + private Map<String, String> filterIntersectingKeys(Map<String, String> primaryProperties, + Map<String, String> otherProperties) { + return primaryProperties.filterKeys(key -> containsKey(key, otherProperties)); + } + + private boolean containsKey(String key, Map<String, String> properties) { + return properties.keySet().contains(key); + } + + private void updateDmaapConfigIfChanged(JSONObject appConfig) { + JSONObject oldDmaapConfig = configFilesFacade.readDMaaPConfiguration().get(); + JSONObject newDmaapConfig = ConfigParsing.getDMaaPConfig(appConfig).get(); + + if (!oldDmaapConfig.similar(newDmaapConfig)) { + configFilesFacade.writeDMaaPConfiguration(newDmaapConfig); + isApplicationRestartNeeded = true; + } + } + + private void restartApplicationIfNeeded() { + if (isApplicationRestartNeeded) { + applicationRestarter.run(); + isApplicationRestartNeeded = false; + } + } +} |