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/*-
* ============LICENSE_START========================================================================
* Copyright (C) 2018 NOKIA Intellectual Property, 2018-2019 Nordix Foundation. 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.dcaegen2.collectors.datafile.configuration;
import java.util.Map;
import java.util.Optional;
import java.util.Properties;
import org.onap.dcaegen2.collectors.datafile.exceptions.EnvironmentLoaderException;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.EnvProperties;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.ImmutableEnvProperties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;
import reactor.core.publisher.Mono;
/**
* Handling the Consul connection.
*
* @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 9/19/18
*/
class EnvironmentProcessor {
private static final int DEFAULT_CONSUL_PORT = 8500;
private static final Logger logger = LoggerFactory.getLogger(EnvironmentProcessor.class);
private EnvironmentProcessor() {
}
static Mono<EnvProperties> readEnvironmentVariables(Properties systemEnvironment, Map<String, String> contextMap) {
MDC.setContextMap(contextMap);
logger.trace("Loading configuration from system environment variables");
EnvProperties envProperties;
try {
envProperties = ImmutableEnvProperties.builder() //
.consulHost(getConsulHost(systemEnvironment)) //
.consulPort(getConsultPort(systemEnvironment)) //
.cbsName(getConfigBindingService(systemEnvironment)) //
.appName(getService(systemEnvironment)) //
.build();
} catch (EnvironmentLoaderException e) {
return Mono.error(e);
}
logger.trace("Evaluated environment system variables {}", envProperties);
return Mono.just(envProperties);
}
private static String getConsulHost(Properties systemEnvironments) throws EnvironmentLoaderException {
return Optional.ofNullable(systemEnvironments.getProperty("CONSUL_HOST"))
.orElseThrow(() -> new EnvironmentLoaderException("$CONSUL_HOST environment has not been defined"));
}
private static Integer getConsultPort(Properties systemEnvironments) {
return Optional.ofNullable(systemEnvironments.getProperty("CONSUL_PORT")) //
.map(Integer::valueOf) //
.orElseGet(EnvironmentProcessor::getDefaultPortOfConsul);
}
private static String getConfigBindingService(Properties systemEnvironments) throws EnvironmentLoaderException {
return Optional.ofNullable(systemEnvironments.getProperty("CONFIG_BINDING_SERVICE")) //
.orElseThrow(
() -> new EnvironmentLoaderException("$CONFIG_BINDING_SERVICE environment has not been defined"));
}
private static String getService(Properties systemEnvironments) throws EnvironmentLoaderException {
return Optional
.ofNullable(Optional.ofNullable(systemEnvironments.getProperty("HOSTNAME"))
.orElse(systemEnvironments.getProperty("SERVICE_NAME")))
.orElseThrow(() -> new EnvironmentLoaderException(
"Neither $HOSTNAME/$SERVICE_NAME have not been defined as system environment"));
}
private static Integer getDefaultPortOfConsul() {
logger.warn("$CONSUL_PORT variable will be set to default port {}", DEFAULT_CONSUL_PORT);
return DEFAULT_CONSUL_PORT;
}
}
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