diff options
author | PawelSzalapski <pawel.szalapski@nokia.com> | 2018-08-02 10:31:56 +0200 |
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committer | PawelSzalapski <pawel.szalapski@nokia.com> | 2018-08-06 09:43:32 +0200 |
commit | 7752c2d818e6d19e4d805c2fd6760b4a13d601bc (patch) | |
tree | 053cbc5afd76a8b9644ec62298053aad8cf5e2a8 /src/main/java/org/onap/dcae/controller/ConfigSource.java | |
parent | 654ebdff4c9ec2487b819d2b76273732759de4c7 (diff) |
Implement second part of dynamic DMaaP config
VESCollector app can now fetch CBS configuration and
rebuilt the part regarding sending events dynamically,
without restarting application.
Application will still be restarted by a .sh script,
if there were changes regarding collector.properties file.
The decision of whether dynamic configuration should be
triggered is now based on existence of env vars
CONSUL_HOST, CONFIG_BINDING_SERVICE, HOSTNAME,
not as previously on CBSPOLLTIME.
Frequency at which the config check should happen is
now exposed via property from collector.properties
Change-Id: I98ff160fa51d08d84a23c716d90ceaacbe17ada6
Signed-off-by: PawelSzalapski <pawel.szalapski@nokia.com>
Issue-ID: DCAEGEN2-519
Diffstat (limited to 'src/main/java/org/onap/dcae/controller/ConfigSource.java')
-rw-r--r-- | src/main/java/org/onap/dcae/controller/ConfigSource.java | 88 |
1 files changed, 88 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 00000000..7e6a9fc8 --- /dev/null +++ b/src/main/java/org/onap/dcae/controller/ConfigSource.java @@ -0,0 +1,88 @@ +/*- + * ============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 static io.vavr.API.Try; +import static org.onap.dcae.commonFunction.event.publishing.VavrUtils.enhanceError; +import static org.onap.dcae.commonFunction.event.publishing.VavrUtils.f; +import static org.onap.dcae.controller.Conversions.toJson; +import static org.onap.dcae.controller.Conversions.toJsonArray; + +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; + +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(strBody -> toJsonArray(strBody)) + .flatMap(json -> withdrawCatalog(json)) + .flatMap(json -> constructFullCBSUrl(json)) + .flatMap(cbsUrl -> callCBSForAppConfig(envProps, cbsUrl)) + .flatMap(strBody -> toJson(strBody)) + .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.consulHost + ":" + envProps.consulPort + "/v1/catalog/service/" + envProps.cbsName) + .mapFailure(enhanceError("Unable to retrieve CBS configuration from Consul")); + } + + private static Try<String> constructFullCBSUrl(JSONObject json) { + return Try(() -> 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(res -> res.getBody()) + .peek(body -> log.info(f("HTTP GET on '%s' returned body '%s'", url, body))); + } + +} |