diff options
Diffstat (limited to 'src/main/java/org/onap/dcae/controller/ConfigSource.java')
-rw-r--r-- | src/main/java/org/onap/dcae/controller/ConfigSource.java | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/src/main/java/org/onap/dcae/controller/ConfigSource.java b/src/main/java/org/onap/dcae/controller/ConfigSource.java new file mode 100644 index 0000000..78cb147 --- /dev/null +++ b/src/main/java/org/onap/dcae/controller/ConfigSource.java @@ -0,0 +1,90 @@ +/*- + * ============LICENSE_START======================================================= + * org.onap.dcaegen2.restconfcollector + * ================================================================================ + * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved. + * Copyright (C) 2018 Nokia. All rights reserved. + * Copyright (C) 2018-2019 Huawei. 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 com.mashape.unirest.http.HttpResponse; +import com.mashape.unirest.http.Unirest; +import io.vavr.control.Try; +import org.json.JSONArray; +import org.json.JSONObject; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import static io.vavr.API.Try; +import static org.onap.dcae.common.publishing.VavrUtils.enhanceError; +import static org.onap.dcae.common.publishing.VavrUtils.f; + +final class ConfigSource { + + private static final Logger log = LoggerFactory.getLogger(ConfigSource.class); + + static Try<JSONObject> getAppConfig(EnvProps envProps) { + log.info("Fetching app configuration from CBS"); + return callConsulForCBSConfiguration(envProps) + .peek(strBody -> log.info(f("Received following CBS configuration from Consul '%s'", strBody))) + .flatMap(Conversions::toJsonArray) + .flatMap(ConfigSource::withdrawCatalog) + .flatMap(json -> constructFullCBSUrl(envProps, json)) + .flatMap(cbsUrl -> callCBSForAppConfig(envProps, cbsUrl)) + .flatMap(Conversions::toJson) + .peek(jsonNode -> log.info(f("Received app configuration: '%s'", jsonNode))) + .onFailure(exc -> log.error("Could not fetch application config", exc)); + } + + private static Try<String> callConsulForCBSConfiguration(EnvProps envProps) { + return executeGet(envProps.consulProtocol + "://" + envProps.consulHost + ":" + + envProps.consulPort + "/v1/catalog/service/" + envProps.cbsName) + .mapFailure(enhanceError("Unable to retrieve CBS configuration from Consul")); + } + + private static Try<String> constructFullCBSUrl(EnvProps envProps, JSONObject json) { + return Try(() -> envProps.cbsProtocol + "://" + json.get("ServiceAddress").toString() + ":" + + json.get("ServicePort").toString()) + .mapFailure(enhanceError("ServiceAddress / ServicePort missing from CBS conf: '%s'", json)); + } + + private static Try<JSONObject> withdrawCatalog(JSONArray json) { + return Try(() -> new JSONObject(json.get(0).toString())) + .mapFailure(enhanceError("CBS response '%s' is in invalid format," + + " most probably is it not a list of configuration objects", json)); + } + + private static Try<String> callCBSForAppConfig(EnvProps envProps, String cbsUrl) { + log.info("Calling CBS for application config"); + return executeGet(cbsUrl + "/service_component/" + envProps.appName) + .mapFailure(enhanceError("Unable to fetch configuration from CBS")); + } + + + private static Try<String> executeGet(String url) { + log.info(f("Calling HTTP GET on url: '%s'", url)); + return Try(() -> Unirest.get(url).asString()) + .mapFailure(enhanceError("Http call (GET '%s') failed.", url)) + .filter( + res -> res.getStatus() == 200, + res -> new RuntimeException(f("HTTP call (GET '%s') failed with status %s and body '%s'", + url, res.getStatus(), res.getBody()))) + .map(HttpResponse::getBody) + .peek(body -> log.info(f("HTTP GET on '%s' returned body '%s'", url, body))); + } + +} |