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/*-
* ========================LICENSE_START=================================
* ONAP : ccsdk oran
* ======================================================================
* Copyright (C) 2019-2020 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.ccsdk.oran.a1policymanagementservice.tasks;
import java.util.Optional;
import java.util.Properties;
import org.onap.ccsdk.oran.a1policymanagementservice.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 reactor.core.publisher.Mono;
/**
* This class reads a few environment variables used for locating the Consul
* (Config Binding Service).
*/
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) {
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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