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/*
* Copyright (C) 2021 Samsung Electronics
* 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
*/
package org.onap.rapp.sleepingcelldetector.service;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import org.onap.rapp.sleepingcelldetector.configuration.SleepingCellDetectorConfiguration;
import org.onap.rapp.sleepingcelldetector.entity.RicConfiguration;
import org.onap.rapp.sleepingcelldetector.entity.ServiceRegistrationPayload;
import org.onap.rapp.sleepingcelldetector.entity.policy.PolicyInstance;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;
@Service
public class PolicyAgentClient {
private static final Logger logger = LoggerFactory.getLogger(PolicyAgentClient.class);
public static final String SERVICE_KEEPALIVE_URL = "/services/keepalive?name=";
public static final String SERVICE_URL = "/service";
public static final String POLICY_TYPES_URL = "/policy_types";
public static final String POLICY_URL = "/policy";
public static final String POLICIES_URL = "/policies";
public static final String SCD_SERVICE_NAME = "rapp-sleepingcelldetector";
public static final String RICS_POLICY_TYPE_URL = "/rics?policyType=";
public static final String POLICY_ACTOR_CALLBACK_URL = "http://rapp-sleepingcelldetector:8382/";
private final SleepingCellDetectorConfiguration config;
private final RestTemplate restTemplate;
private final JsonHelper jsonHelper;
public PolicyAgentClient(SleepingCellDetectorConfiguration config, RestTemplate restTemplate, JsonHelper jsonHelper) {
this.config = config;
this.restTemplate = restTemplate;
this.jsonHelper = jsonHelper;
}
public void sendPolicyEvent(PolicyInstance policy, RicConfiguration ricConfig) {
ricConfig.getPolicyTypes().forEach(policyType -> {
String policyServiceUrl = getUpdatePolicyUrl(ricConfig, policyType, policy.getId());
String policyRequest = jsonHelper.objectToJsonString(policy.getJson());
sendUpdatePolicyRequest(policyServiceUrl, policyRequest);
});
}
private String getUpdatePolicyUrl(RicConfiguration ricConfig, String policyTypeId, String policyId) {
String queryParams = POLICY_URL + "?id=" + policyId + "&ric=" + ricConfig.getRicName()
+ "&service=" + SCD_SERVICE_NAME + "&type=" + policyTypeId;
return getA1PolicyBaseUrl() + queryParams;
}
private void sendUpdatePolicyRequest(String policyServiceUrl, String policyRequest) {
logger.info("Sending policy event; URL: {},\n Policy: {}", policyServiceUrl, policyRequest);
restTemplate.put(policyServiceUrl, createPolicyUpdateRequestEntity(policyRequest));
}
private HttpEntity<String> createPolicyUpdateRequestEntity(String policy) {
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
return new HttpEntity<>(policy, headers);
}
public void deletePolicyInstance(String id){
try {
logger.info("Policy instance {} remove request will be send", id);
String deletePolicyUrl = getA1PolicyBaseUrl() + POLICY_URL + "?id=" + id;
restTemplate.delete(deletePolicyUrl);
} catch (Exception e){
logger.warn("Exception during policy deletion: {} \nPolicy {} was already removed", e.getMessage(), id);
}
}
public List<String> getPoliciesIds() {
String policyIdsUrl = getA1PolicyBaseUrl() + POLICY_TYPES_URL;
ResponseEntity<String[]> policyIds = restTemplate.getForEntity(policyIdsUrl, String[].class);
return Arrays.asList(Objects.requireNonNull(policyIds.getBody()));
}
public List<PolicyInstance> getPoliciesInstances(){
String policiesUrl = getA1PolicyBaseUrl() + POLICIES_URL;
ResponseEntity<PolicyInstance[]> policiesResponse = restTemplate.getForEntity(policiesUrl, PolicyInstance[].class);
if (policiesResponse.hasBody()){
return Arrays.asList(policiesResponse.getBody());
} else {
return Collections.emptyList();
}
}
public List<RicConfiguration> getRicConfigurationsByPolicyId(String policyId) {
String ricConfigUrl = getA1PolicyBaseUrl() + RICS_POLICY_TYPE_URL + policyId;
ResponseEntity<RicConfiguration[]> ricConfigResponse = restTemplate.getForEntity(ricConfigUrl, RicConfiguration[].class);
if (ricConfigResponse.hasBody()){
return Arrays.asList(ricConfigResponse.getBody());
} else {
return Collections.emptyList();
}
}
public boolean createService() {
String createServiceUrl = getA1PolicyBaseUrl() + SERVICE_URL;
ServiceRegistrationPayload payload = buildPayload();
HttpEntity<String> entity = prepareRequest(payload);
ResponseEntity<String> response = restTemplate.exchange(createServiceUrl, HttpMethod.PUT, entity, String.class);
if (response.getStatusCode().is2xxSuccessful()) {
logger.info("Service created");
return true;
} else {
logger.warn("Problem with service registration request, response: {}", response.getStatusCode());
return false;
}
}
private HttpEntity<String> prepareRequest(ServiceRegistrationPayload payload) {
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
return new HttpEntity<>(jsonHelper.objectToJsonString(payload), headers);
}
private ServiceRegistrationPayload buildPayload() {
return ServiceRegistrationPayload.builder()
.callBackUrl(POLICY_ACTOR_CALLBACK_URL)
.keepAliveIntervalSeconds("20")
.serviceName(SCD_SERVICE_NAME)
.build();
}
public void sendKeepAliveRequest() {
String createServiceUrl = getA1PolicyBaseUrl() + SERVICE_KEEPALIVE_URL + SCD_SERVICE_NAME;
restTemplate.put(createServiceUrl, Void.class);
logger.info("Keep alive request performed");
}
private String getA1PolicyBaseUrl() {
return config.getA1PolicyBaseUrl();
}
}
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