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/*-
* ========================LICENSE_START=================================
* ONAP : ccsdk oran
* ======================================================================
* Copyright (C) 2020 Nordix Foundation. 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.ccsdk.oran.a1policymanagementservice.clients;
import java.lang.invoke.MethodHandles;
import java.util.List;
import org.json.JSONObject;
import org.onap.ccsdk.oran.a1policymanagementservice.configuration.RicConfig;
import org.onap.ccsdk.oran.a1policymanagementservice.repository.Policy;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
/**
* Client for accessing OSC A1 REST API
*/
@SuppressWarnings("squid:S2629") // Invoke method(s) only conditionally
public class OscA1Client implements A1Client {
static final int CONCURRENCY_RIC = 1; // How many paralell requests that is sent to one NearRT RIC
public static class UriBuilder implements A1UriBuilder {
private final RicConfig ricConfig;
public UriBuilder(RicConfig ricConfig) {
this.ricConfig = ricConfig;
}
@Override
public String createPutPolicyUri(String type, String policyId, String notificationDestinationUri) {
return createPolicyUri(type, policyId);
}
/**
* /a1-p/policytypes/{policy_type_id}/policies
*/
@Override
public String createGetPolicyIdsUri(String type) {
return createPolicyTypeUri(type) + "/policies";
}
@Override
public String createDeleteUri(String type, String policyId) {
return createPolicyUri(type, policyId);
}
/**
* /a1-p/policytypes/{policy_type_id}/policies/{policy_instance_id}/status
*/
@Override
public String createGetPolicyStatusUri(String type, String policyId) {
return createPolicyUri(type, policyId) + "/status";
}
/**
* /a1-p/healthcheck
*/
public String createHealtcheckUri() {
return baseUri() + "/healthcheck";
}
/**
* /a1-p/policytypes/{policy_type_id}
*/
@Override
public String createGetSchemaUri(String type) {
return this.createPolicyTypeUri(type);
}
/**
* /a1-p/policytypes/{policy_type_id}
*/
@Override
public String createPolicyTypesUri() {
return baseUri() + "/policytypes";
}
/**
* /a1-p/policytypes/{policy_type_id}/policies/{policy_instance_id}
*/
private String createPolicyUri(String type, String id) {
return createPolicyTypeUri(type) + "/policies/" + id;
}
/**
* /a1-p/policytypes/{policy_type_id}
*/
private String createPolicyTypeUri(String type) {
return createPolicyTypesUri() + "/" + type;
}
private String baseUri() {
return ricConfig.getBaseUrl() + "/a1-p";
}
}
private static final String TITLE = "title";
private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
private final AsyncRestClient restClient;
private final UriBuilder uri;
public OscA1Client(RicConfig ricConfig, AsyncRestClientFactory restClientFactory) {
this(ricConfig, restClientFactory.createRestClientUseHttpProxy(""));
}
public OscA1Client(RicConfig ricConfig, AsyncRestClient restClient) {
this.restClient = restClient;
logger.debug("OscA1Client for ric: {}", ricConfig.getRicId());
uri = new UriBuilder(ricConfig);
}
public static Mono<String> extractCreateSchema(String policyTypeResponse, String policyTypeId) {
try {
JSONObject obj = new JSONObject(policyTypeResponse);
JSONObject schemaObj = obj.getJSONObject("create_schema");
schemaObj.put(TITLE, policyTypeId);
return Mono.just(schemaObj.toString());
} catch (Exception e) {
String exceptionString = e.toString();
logger.error("Unexpected response for policy type: {}, exception: {}", policyTypeResponse, exceptionString);
return Mono.error(e);
}
}
@Override
public Mono<List<String>> getPolicyTypeIdentities() {
return getPolicyTypeIds() //
.collectList();
}
@Override
public Mono<List<String>> getPolicyIdentities() {
return getPolicyTypeIds() //
.flatMap(this::getPolicyIdentitiesByType) //
.collectList();
}
@Override
public Mono<String> getPolicyTypeSchema(String policyTypeId) {
String schemaUri = uri.createGetSchemaUri(policyTypeId);
return restClient.get(schemaUri) //
.flatMap(response -> extractCreateSchema(response, policyTypeId));
}
@Override
public Mono<String> putPolicy(Policy policy) {
String policyUri = this.uri.createPutPolicyUri(policy.getType().getId(), policy.getId(),
policy.getStatusNotificationUri());
return restClient.put(policyUri, policy.getJson());
}
@Override
public Mono<String> deletePolicy(Policy policy) {
return deletePolicyById(policy.getType().getId(), policy.getId());
}
@Override
public Mono<A1ProtocolType> getProtocolVersion() {
return restClient.get(uri.createHealtcheckUri()) //
.flatMap(notUsed -> Mono.just(A1ProtocolType.OSC_V1));
}
@Override
public Flux<String> deleteAllPolicies() {
return getPolicyTypeIds() //
.flatMap(this::deletePoliciesForType, CONCURRENCY_RIC);
}
@Override
public Mono<String> getPolicyStatus(Policy policy) {
String statusUri = uri.createGetPolicyStatusUri(policy.getType().getId(), policy.getId());
return restClient.get(statusUri);
}
private Flux<String> getPolicyTypeIds() {
return restClient.get(uri.createPolicyTypesUri()) //
.flatMapMany(A1AdapterJsonHelper::parseJsonArrayOfString);
}
private Flux<String> getPolicyIdentitiesByType(String typeId) {
return restClient.get(uri.createGetPolicyIdsUri(typeId)) //
.flatMapMany(A1AdapterJsonHelper::parseJsonArrayOfString);
}
private Mono<String> deletePolicyById(String typeId, String policyId) {
String policyUri = uri.createDeleteUri(typeId, policyId);
return restClient.delete(policyUri);
}
private Flux<String> deletePoliciesForType(String typeId) {
return getPolicyIdentitiesByType(typeId) //
.flatMap(policyId -> deletePolicyById(typeId, policyId), CONCURRENCY_RIC);
}
}
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