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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2023 Nordix Foundation
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.cps.ncmp.api.impl.subscriptions;
import static org.onap.cps.ncmp.api.impl.constants.DmiRegistryConstants.NO_TIMESTAMP;
import java.io.Serializable;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.stream.Collectors;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.onap.cps.api.CpsDataService;
import org.onap.cps.ncmp.api.impl.utils.DataNodeHelper;
import org.onap.cps.ncmp.api.impl.yangmodels.YangModelSubscriptionEvent;
import org.onap.cps.spi.FetchDescendantsOption;
import org.onap.cps.spi.model.DataNode;
import org.onap.cps.utils.JsonObjectMapper;
import org.springframework.stereotype.Component;
@Slf4j
@RequiredArgsConstructor
@Component
public class SubscriptionPersistenceImpl implements SubscriptionPersistence {
private static final String SUBSCRIPTION_DATASPACE_NAME = "NCMP-Admin";
private static final String SUBSCRIPTION_ANCHOR_NAME = "AVC-Subscriptions";
private static final String SUBSCRIPTION_REGISTRY_PARENT = "/subscription-registry";
private final JsonObjectMapper jsonObjectMapper;
private final CpsDataService cpsDataService;
@Override
public void saveSubscriptionEvent(final YangModelSubscriptionEvent yangModelSubscriptionEvent) {
final String clientId = yangModelSubscriptionEvent.getClientId();
final String subscriptionName = yangModelSubscriptionEvent.getSubscriptionName();
final Collection<DataNode> dataNodes = cpsDataService.getDataNodes(SUBSCRIPTION_DATASPACE_NAME,
SUBSCRIPTION_ANCHOR_NAME, SUBSCRIPTION_REGISTRY_PARENT, FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS);
if (isSubscriptionRegistryEmptyOrNonExist(dataNodes, clientId, subscriptionName)) {
saveSubscriptionEventYangModel(createSubscriptionEventJsonData(
jsonObjectMapper.asJsonString(yangModelSubscriptionEvent)));
} else {
findDeltaCmHandlesAddOrUpdateInDatabase(yangModelSubscriptionEvent, clientId, subscriptionName, dataNodes);
}
}
private void findDeltaCmHandlesAddOrUpdateInDatabase(final YangModelSubscriptionEvent yangModelSubscriptionEvent,
final String clientId, final String subscriptionName,
final Collection<DataNode> dataNodes) {
final Map<String, SubscriptionStatus> cmHandleIdsFromYangModel =
extractCmHandleFromYangModelAsMap(yangModelSubscriptionEvent);
final Map<String, SubscriptionStatus> cmHandleIdsFromDatabase =
extractCmHandleFromDbAsMap(dataNodes);
final Map<String, SubscriptionStatus> newCmHandles =
mapDifference(cmHandleIdsFromYangModel, cmHandleIdsFromDatabase);
traverseCmHandleList(newCmHandles, clientId, subscriptionName, true);
final Map<String, SubscriptionStatus> existingCmHandles =
mapDifference(cmHandleIdsFromYangModel, newCmHandles);
traverseCmHandleList(existingCmHandles, clientId, subscriptionName, false);
}
private boolean isSubscriptionRegistryEmptyOrNonExist(final Collection<DataNode> dataNodes,
final String clientId, final String subscriptionName) {
final Optional<DataNode> dataNodeFirst = dataNodes.stream().findFirst();
return ((dataNodeFirst.isPresent() && dataNodeFirst.get().getChildDataNodes().isEmpty())
|| getCmHandlesForSubscriptionEvent(clientId, subscriptionName).isEmpty());
}
private void traverseCmHandleList(final Map<String, SubscriptionStatus> cmHandleMap,
final String clientId,
final String subscriptionName,
final boolean isAddListElementOperation) {
final List<YangModelSubscriptionEvent.TargetCmHandle> cmHandleList =
targetCmHandlesAsList(cmHandleMap);
for (final YangModelSubscriptionEvent.TargetCmHandle targetCmHandle : cmHandleList) {
final String targetCmHandleAsJson =
createTargetCmHandleJsonData(jsonObjectMapper.asJsonString(targetCmHandle));
addOrReplaceCmHandlePredicateListElement(targetCmHandleAsJson, clientId, subscriptionName,
isAddListElementOperation);
}
}
private void addOrReplaceCmHandlePredicateListElement(final String targetCmHandleAsJson,
final String clientId,
final String subscriptionName,
final boolean isAddListElementOperation) {
if (isAddListElementOperation) {
log.info("targetCmHandleAsJson to be added into DB {}", targetCmHandleAsJson);
cpsDataService.saveListElements(SUBSCRIPTION_DATASPACE_NAME,
SUBSCRIPTION_ANCHOR_NAME, createCmHandleXpathPredicates(clientId, subscriptionName),
targetCmHandleAsJson, NO_TIMESTAMP);
} else {
log.info("targetCmHandleAsJson to be updated into DB {}", targetCmHandleAsJson);
cpsDataService.updateNodeLeaves(SUBSCRIPTION_DATASPACE_NAME,
SUBSCRIPTION_ANCHOR_NAME, createCmHandleXpathPredicates(clientId, subscriptionName),
targetCmHandleAsJson, NO_TIMESTAMP);
}
}
private void saveSubscriptionEventYangModel(final String subscriptionEventJsonData) {
log.info("SubscriptionEventJsonData to be saved into DB {}", subscriptionEventJsonData);
cpsDataService.saveListElements(SUBSCRIPTION_DATASPACE_NAME, SUBSCRIPTION_ANCHOR_NAME,
SUBSCRIPTION_REGISTRY_PARENT, subscriptionEventJsonData, NO_TIMESTAMP);
}
@Override
public Collection<DataNode> getDataNodesForSubscriptionEvent() {
return cpsDataService.getDataNodes(SUBSCRIPTION_DATASPACE_NAME,
SUBSCRIPTION_ANCHOR_NAME, SUBSCRIPTION_REGISTRY_PARENT,
FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS);
}
@Override
public Collection<DataNode> getCmHandlesForSubscriptionEvent(final String clientId, final String subscriptionName) {
return cpsDataService.getDataNodesForMultipleXpaths(SUBSCRIPTION_DATASPACE_NAME,
SUBSCRIPTION_ANCHOR_NAME, Arrays.asList(createCmHandleXpath(clientId, subscriptionName)),
FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS);
}
private static Map<String, SubscriptionStatus> extractCmHandleFromDbAsMap(final Collection<DataNode> dataNodes) {
final List<Map<String, Serializable>> dataNodeLeaves = DataNodeHelper.getDataNodeLeaves(dataNodes);
final List<Collection<Serializable>> cmHandleIdToStatus = DataNodeHelper.getCmHandleIdToStatus(dataNodeLeaves);
return DataNodeHelper.getCmHandleIdToStatusMap(cmHandleIdToStatus);
}
private static Map<String, SubscriptionStatus> extractCmHandleFromYangModelAsMap(
final YangModelSubscriptionEvent yangModelSubscriptionEvent) {
return yangModelSubscriptionEvent.getPredicates().getTargetCmHandles()
.stream().collect(Collectors.toMap(
YangModelSubscriptionEvent.TargetCmHandle::getCmHandleId,
YangModelSubscriptionEvent.TargetCmHandle::getStatus));
}
private static List<YangModelSubscriptionEvent.TargetCmHandle> targetCmHandlesAsList(
final Map<String, SubscriptionStatus> newCmHandles) {
return newCmHandles.entrySet().stream().map(entry ->
new YangModelSubscriptionEvent.TargetCmHandle(entry.getKey(),
entry.getValue())).collect(Collectors.toList());
}
private static String createSubscriptionEventJsonData(final String yangModelSubscriptionAsJson) {
return "{\"subscription\":[" + yangModelSubscriptionAsJson + "]}";
}
private static String createTargetCmHandleJsonData(final String targetCmHandleAsJson) {
return "{\"targetCmHandles\":[" + targetCmHandleAsJson + "]}";
}
private static String createCmHandleXpathPredicates(final String clientId, final String subscriptionName) {
return "/subscription-registry/subscription[@clientID='" + clientId
+ "' and @subscriptionName='" + subscriptionName + "']/predicates";
}
private static String createCmHandleXpath(final String clientId, final String subscriptionName) {
return "/subscription-registry/subscription[@clientID='" + clientId
+ "' and @subscriptionName='" + subscriptionName + "']";
}
private static <K, V> Map<K, V> mapDifference(final Map<? extends K, ? extends V> left,
final Map<? extends K, ? extends V> right) {
final Map<K, V> difference = new HashMap<>();
difference.putAll(left);
difference.putAll(right);
difference.entrySet().removeAll(right.entrySet());
return difference;
}
}
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