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/*-
* ============LICENSE_START=======================================================
* org.onap.dcaegen2.collectors.ves
* ================================================================================
* Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
* Copyright (C) 2018 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.controller;
import static org.onap.dcae.common.publishing.DMaaPConfigurationParser.parseToDomainMapping;
import static org.onap.dcae.controller.ConfigParsing.getDMaaPConfig;
import static org.onap.dcae.controller.ConfigParsing.getProperties;
import static org.onap.dcae.controller.EnvPropertiesReader.readEnvProps;
import io.vavr.Function0;
import io.vavr.Function1;
import io.vavr.collection.HashMap;
import io.vavr.collection.Map;
import io.vavr.control.Try;
import java.nio.file.Path;
import java.util.function.Consumer;
import org.json.JSONObject;
import org.onap.dcae.common.publishing.PublisherConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ConfigLoader {
private static final String SKIP_MSG = "Skipping dynamic configuration update";
private static Logger log = LoggerFactory.getLogger(ConfigLoader.class);
private final Consumer<Map<String, PublisherConfig>> eventPublisherReconfigurer;
private final ConfigFilesFacade configFilesFacade;
private final Function1<EnvProps, Try<JSONObject>> configurationSource;
private final Function0<Map<String, String>> envVariablesSupplier;
ConfigLoader(Consumer<Map<String, PublisherConfig>> eventPublisherReconfigurer,
ConfigFilesFacade configFilesFacade,
Function1<EnvProps, Try<JSONObject>> configurationSource,
Function0<Map<String, String>> envVariablesSupplier) {
this.eventPublisherReconfigurer = eventPublisherReconfigurer;
this.configFilesFacade = configFilesFacade;
this.configurationSource = configurationSource;
this.envVariablesSupplier = envVariablesSupplier;
}
public static ConfigLoader create(Consumer<Map<String, PublisherConfig>> eventPublisherReconfigurer,
Path dMaaPConfigFile, Path propertiesConfigFile) {
return new ConfigLoader(eventPublisherReconfigurer,
new ConfigFilesFacade(dMaaPConfigFile, propertiesConfigFile),
ConfigSource::getAppConfig,
() -> HashMap.ofAll(System.getenv()));
}
public void updateConfig() {
log.info("Trying to dynamically update config from Config Binding Service");
readEnvProps(envVariablesSupplier.get())
.onEmpty(() -> log.warn(SKIP_MSG))
.forEach(props -> updateConfig(props));
}
private void updateConfig(EnvProps props) {
configurationSource.apply(props)
.onFailure(logSkip())
.onSuccess(newConf -> {
updateConfigurationProperties(newConf);
updateDMaaPProperties(newConf);
}
);
}
private void updateDMaaPProperties(JSONObject newConf) {
configFilesFacade.readDMaaPConfiguration()
.onFailure(logSkip())
.onSuccess(oldDMaaPConf -> getDMaaPConfig(newConf)
.onEmpty(() -> log.warn(SKIP_MSG))
.forEach(newDMaaPConf -> compareAndOverwriteDMaaPConfig(oldDMaaPConf, newDMaaPConf)));
}
private void updateConfigurationProperties(JSONObject newConf) {
configFilesFacade.readCollectorProperties()
.onFailure(logSkip())
.onSuccess(oldProps -> compareAndOverwritePropertiesConfig(newConf, oldProps));
}
private void compareAndOverwritePropertiesConfig(JSONObject newConf, Map<String, String> oldProps) {
Map<String, String> newProperties = getProperties(newConf);
if (!oldProps.equals(newProperties)) {
configFilesFacade.writeProperties(newProperties)
.onSuccess(__ -> log.info("New properties configuration written to file"))
.onFailure(logSkip());
} else {
log.info("Collector properties from CBS are the same as currently used ones. " + SKIP_MSG);
}
}
private void compareAndOverwriteDMaaPConfig(JSONObject oldDMaaPConf, JSONObject newDMaaPConf) {
if (!oldDMaaPConf.toString().equals(newDMaaPConf.toString())) {
parseToDomainMapping(newDMaaPConf)
.onFailure(exc -> log.error(SKIP_MSG, exc))
.onSuccess(eventPublisherReconfigurer)
.onSuccess(parsedConfig ->
configFilesFacade.writeDMaaPConfiguration(newDMaaPConf)
.onFailure(logSkip())
.onSuccess(__ -> log.info("New dMaaP configuration written to file")));
} else {
log.info("DMaaP config from CBS is the same as currently used one. " + SKIP_MSG);
}
}
private Consumer<Throwable> logSkip() {
return __ -> log.error(SKIP_MSG);
}
}
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