2 * ============LICENSE_START=======================================================
3 * org.onap.dcaegen2.collectors.ves
4 * ================================================================================
5 * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
6 * Copyright (C) 2018 Nokia. All rights reserved.
7 * ================================================================================
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 * ============LICENSE_END=========================================================
21 package org.onap.dcae.controller;
23 import static io.vavr.API.List;
24 import static io.vavr.API.Try;
25 import static org.onap.dcae.commonFunction.event.publishing.VavrUtils.f;
27 import io.vavr.collection.Map;
28 import io.vavr.control.Option;
29 import org.slf4j.Logger;
30 import org.slf4j.LoggerFactory;
32 final class EnvPropertiesReader {
34 private final static Logger log = LoggerFactory.getLogger(EnvPropertiesReader.class);
36 static Option<EnvProps> readEnvProps(Map<String, String> environmentVariables) {
37 log.info("Loading necessary environment variables for dynamic configuration update");
38 int consulPort = getConsulPort(environmentVariables);
39 Option<String> consulHost = getConsulHost(environmentVariables);
40 Option<String> cbsServiceName = getCBSName(environmentVariables);
41 Option<String> vesCollectorAppName = getAppName(environmentVariables);
42 return Option.sequence(List(consulHost, cbsServiceName, vesCollectorAppName))
43 .map(e -> new EnvProps(e.get(0), consulPort, e.get(1), e.get(2)))
44 .onEmpty(() -> log.warn("Some required environment variables are missing"))
45 .peek(props -> log.info(f("Discovered following environment variables: '%s'", props)));
48 private static Option<String> getAppName(Map<String, String> environmentVariables) {
49 return environmentVariables.get("HOSTNAME")
50 .orElse(environmentVariables.get("SERVICE_NAME"))
51 .onEmpty(() -> log.warn("App service name (as registered in CBS) (env var: 'HOSTNAME' / 'SERVICE_NAME') "
52 + "is missing error environment variables."));
55 private static Option<String> getCBSName(Map<String, String> environmentVariables) {
56 return environmentVariables.get("CONFIG_BINDING_SERVICE")
57 .onEmpty(() -> log.warn("Name of CBS Service (as registered in Consul) (env var: 'CONFIG_BINDING_SERVICE') "
58 + "is missing from environment variables."));
61 private static Integer getConsulPort(Map<String, String> environmentVariables) {
62 return environmentVariables.get("CONSUL_PORT")
63 .flatMap(str -> Try(() -> Integer.valueOf(str))
64 .onFailure(exc -> log.warn("Consul port is not an integer value", exc))
66 .onEmpty(() -> log.warn("Consul port (env var: 'CONSUL_PORT') is missing from environment variables. "
67 + "Using default value of 8500"))
71 private static Option<String> getConsulHost(Map<String, String> environmentVariables) {
72 return environmentVariables.get("CONSUL_HOST")
73 .onEmpty(() -> log.warn("Consul host (env var: 'CONSUL_HOST') (without port) "
74 + "is missing from environment variables."));