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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 io.vavr.collection.Map;
import io.vavr.control.Option;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static io.vavr.API.List;
import static io.vavr.API.Try;
import static org.onap.dcae.common.publishing.VavrUtils.f;
final class EnvPropertiesReader {
private final static Logger log = LoggerFactory.getLogger(EnvPropertiesReader.class);
static Option<EnvProps> readEnvProps(Map<String, String> environmentVariables) {
log.info("Loading necessary environment variables for dynamic configuration update");
int consulPort = getConsulPort(environmentVariables);
String consulProtocol = getConsulProtocol(environmentVariables);
String cbsProtocol = getCbsProtocol(environmentVariables);
Option<String> consulHost = getConsulHost(environmentVariables);
Option<String> cbsServiceName = getCBSName(environmentVariables);
Option<String> vesCollectorAppName = getAppName(environmentVariables);
return Option.sequence(List(consulHost, cbsServiceName, vesCollectorAppName))
.map(e -> new EnvProps(consulProtocol, e.get(0), consulPort, cbsProtocol, e.get(1), e.get(2)))
.onEmpty(() -> log.warn("Some required environment variables are missing"))
.peek(props -> log.info(f("Discovered following environment variables: '%s'", props)));
}
private static Option<String> getAppName(Map<String, String> environmentVariables) {
return environmentVariables.get("HOSTNAME")
.orElse(environmentVariables.get("SERVICE_NAME"))
.onEmpty(() -> log.warn("App service name (as registered in CBS) (env var: 'HOSTNAME' / 'SERVICE_NAME') "
+ "is missing error environment variables."));
}
private static Option<String> getCBSName(Map<String, String> environmentVariables) {
return environmentVariables.get("CONFIG_BINDING_SERVICE")
.onEmpty(() -> log.warn("Name of CBS Service (as registered in Consul) (env var: 'CONFIG_BINDING_SERVICE') "
+ "is missing from environment variables."));
}
private static Integer getConsulPort(Map<String, String> environmentVariables) {
return environmentVariables.get("CONSUL_PORT")
.flatMap(str -> Try(() -> Integer.valueOf(str))
.onFailure(exc -> log.warn("Consul port is not an integer value", exc))
.toOption())
.onEmpty(() -> log.warn("Consul port (env var: 'CONSUL_PORT') is missing from environment variables. "
+ "Using default value of 8500"))
.getOrElse(8500);
}
private static Option<String> getConsulHost(Map<String, String> environmentVariables) {
return environmentVariables.get("CONSUL_HOST")
.onEmpty(() -> log.warn("Consul host (env var: 'CONSUL_HOST') (without port) "
+ "is missing from environment variables."));
}
private static String getConsulProtocol(Map<String, String> environmentVariables) {
return getProtocolFrom("CONSUL_PROTOCOL", environmentVariables);
}
private static String getCbsProtocol(Map<String, String> environmentVariables) {
return getProtocolFrom("CBS_PROTOCOL", environmentVariables);
}
private static String getProtocolFrom(String variableName, Map<String, String> environmentVariables) {
return environmentVariables.get(variableName)
.onEmpty(() -> log.warn("Consul protocol (env var: '" + variableName + "') is missing "
+ "from environment variables."))
.getOrElse("http");
}
}
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