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/*******************************************************************************
* ============LICENSE_START=======================================================
* slice-analysis-ms
* ================================================================================
* Copyright (C) 2020-2021 Wipro Limited.
* Copyright (C) 2022 Huawei Technologies Co., Ltd.
* ==============================================================================
* 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.slice.analysis.ms.controller;
import com.google.gson.Gson;
import com.google.gson.JsonObject;
import com.google.gson.reflect.TypeToken;
import java.lang.reflect.Type;
import java.time.Duration;
import java.util.Map;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.CbsClientFactory;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.CbsRequests;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.CbsRequest;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.CbsClientConfiguration;
import org.onap.dcaegen2.services.sdk.rest.services.model.logging.RequestDiagnosticContext;
import org.onap.slice.analysis.ms.models.ConfigPolicy;
import org.onap.slice.analysis.ms.models.Configuration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import reactor.core.Disposable;
/**
* This class provides method to fetch application Configuration
* from CBS
*/
public class ConfigFetchFromCbs implements Runnable {
private static Logger log = LoggerFactory.getLogger(ConfigFetchFromCbs.class);
private Duration interval;
public ConfigFetchFromCbs() {
}
public ConfigFetchFromCbs(Duration interval) {
this.interval = interval;
}
/**
* Gets app config from CBS.
*/
private Disposable getAppConfig() {
// Generate RequestID and InvocationID which will be used when logging and in
// HTTP requests
log.info("getAppconfig start ..");
RequestDiagnosticContext diagnosticContext = RequestDiagnosticContext.create();
// Read necessary properties from the environment
final CbsClientConfiguration cbsClientConfiguration = CbsClientConfiguration.fromEnvironment();
log.debug("environments {}", cbsClientConfiguration);
ConfigPolicy configPolicy = ConfigPolicy.getInstance();
// Polling properties
final Duration initialDelay = Duration.ofSeconds(5);
final Duration period = interval;
// Create the client and use it to get the configuration
final CbsRequest request = CbsRequests.getAll(diagnosticContext);
return CbsClientFactory.createCbsClient(cbsClientConfiguration)
.flatMapMany(cbsClient -> cbsClient.updates(request, initialDelay, period)).subscribe(jsonObject -> {
log.info("configuration and policy from CBS {}", jsonObject);
JsonObject config = jsonObject.getAsJsonObject("config");
Duration newPeriod = Duration.ofSeconds(config.get("cbsPollingInterval").getAsInt());
if (!newPeriod.equals(period)) {
interval = newPeriod;
synchronized (this) {
this.notifyAll();
}
}
Configuration.getInstance().updateConfigurationFromJsonObject(config);
Type mapType = new TypeToken<Map<String, Object>>() {
}.getType();
if (jsonObject.getAsJsonObject("policies") != null) {
if(jsonObject.getAsJsonObject("policies").getAsJsonArray("items").size() == 0) {
log.error("No policy in policy drool pdp engine, nothing to update.");
} else {
JsonObject policyJson = jsonObject.getAsJsonObject("policies").getAsJsonArray("items").get(0)
.getAsJsonObject().getAsJsonObject("config");
Map<String, Object> policy = new Gson().fromJson(policyJson, mapType);
configPolicy.setConfig(policy);
log.info("Config policy {}", configPolicy);
}
}
}, throwable -> log.warn("Ooops", throwable));
}
@Override
public void run() {
Boolean done = false;
while (!done) {
try {
Disposable disp = getAppConfig();
synchronized (this) {
this.wait();
}
log.info("Polling interval changed");
disp.dispose();
} catch (Exception e) {
done = true;
}
}
}
}
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