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/*
* ============LICENSE_START=======================================================
* PNF-REGISTRATION-HANDLER
* ================================================================================
* Copyright (C) 2018 NOKIA Intellectual Property. 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.services.prh.configuration;
import org.onap.dcaegen2.services.prh.exceptions.EnvironmentLoaderException;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.http.configuration.EnvProperties;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.http.configuration.ImmutableEnvProperties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import reactor.core.publisher.Mono;
import java.util.Optional;
import java.util.Properties;
/**
* @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 8/10/18
*/
final class EnvironmentProcessor {
private static final Logger LOGGER = LoggerFactory.getLogger(EnvironmentProcessor.class);
private static final int DEFAULT_CONSUL_PORT = 8500;
private EnvironmentProcessor() {
}
static Mono<EnvProperties> evaluate(Properties systemEnvironment) {
LOGGER.debug("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.info("Evaluated system environment 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 environment has not been defined, using default port: {}", DEFAULT_CONSUL_PORT);
return DEFAULT_CONSUL_PORT;
}
}
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