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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2024 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.events.cmsubscription.service;
import static org.onap.cps.spi.FetchDescendantsOption.OMIT_DESCENDANTS;
import java.io.Serializable;
import java.time.OffsetDateTime;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.onap.cps.api.CpsDataService;
import org.onap.cps.api.CpsQueryService;
import org.onap.cps.cpspath.parser.CpsPathUtil;
import org.onap.cps.ncmp.api.impl.operations.DatastoreType;
import org.onap.cps.spi.model.DataNode;
import org.onap.cps.utils.ContentType;
import org.onap.cps.utils.JsonObjectMapper;
import org.springframework.stereotype.Service;
@Slf4j
@Service
@RequiredArgsConstructor
public class CmNotificationSubscriptionPersistenceServiceImpl implements CmNotificationSubscriptionPersistenceService {
private static final String SUBSCRIPTION_ANCHOR_NAME = "cm-data-subscriptions";
private static final String CM_SUBSCRIPTION_CPS_PATH_QUERY = """
/datastores/datastore[@name='%s']/cm-handles/cm-handle[@id='%s']/filters/filter[@xpath='%s']
""".trim();
private static final String SUBSCRIPTION_IDS_CPS_PATH_QUERY = """
//filter/subscriptionIds[text()='%s']
""".trim();
private final JsonObjectMapper jsonObjectMapper;
private final CpsQueryService cpsQueryService;
private final CpsDataService cpsDataService;
@Override
public boolean isOngoingCmNotificationSubscription(final DatastoreType datastoreType, final String cmHandleId,
final String xpath) {
return !getOngoingCmNotificationSubscriptionIds(datastoreType, cmHandleId, xpath).isEmpty();
}
@Override
public boolean isUniqueSubscriptionId(final String subscriptionId) {
return cpsQueryService.queryDataNodes(NCMP_DATASPACE_NAME, SUBSCRIPTION_ANCHOR_NAME,
SUBSCRIPTION_IDS_CPS_PATH_QUERY.formatted(subscriptionId),
OMIT_DESCENDANTS).isEmpty();
}
@Override
public Collection<String> getOngoingCmNotificationSubscriptionIds(final DatastoreType datastoreType,
final String cmHandleId, final String xpath) {
final String isOngoingCmSubscriptionCpsPathQuery =
CM_SUBSCRIPTION_CPS_PATH_QUERY.formatted(datastoreType.getDatastoreName(), cmHandleId,
escapeQuotesByDoublingThem(xpath));
final Collection<DataNode> existingNodes =
cpsQueryService.queryDataNodes(NCMP_DATASPACE_NAME, CM_SUBSCRIPTIONS_ANCHOR_NAME,
isOngoingCmSubscriptionCpsPathQuery, OMIT_DESCENDANTS);
if (existingNodes.isEmpty()) {
return Collections.emptyList();
}
return (List<String>) existingNodes.iterator().next().getLeaves().get("subscriptionIds");
}
@Override
public void addCmNotificationSubscription(final DatastoreType datastoreType, final String cmHandleId,
final String xpath, final String subscriptionId) {
if (isOngoingCmNotificationSubscription(datastoreType, cmHandleId, xpath)
&& (!getOngoingCmNotificationSubscriptionIds(datastoreType, cmHandleId, xpath)
.contains(subscriptionId))) {
final DataNode subscriptionAsDataNode = getSubscriptionAsDataNode(datastoreType, cmHandleId, xpath);
final Collection<String> subscriptionIds = getOngoingCmNotificationSubscriptionIds(datastoreType,
cmHandleId, xpath);
subscriptionIds.add(subscriptionId);
saveSubscriptionDetails(subscriptionAsDataNode, subscriptionIds);
} else {
addNewSubscriptionViaDatastore(datastoreType, cmHandleId, xpath, subscriptionId);
}
}
@Override
public void removeCmNotificationSubscription(final DatastoreType datastoreType, final String cmHandleId,
final String xpath, final String subscriptionId) {
final DataNode subscriptionAsDataNode = getSubscriptionAsDataNode(datastoreType, cmHandleId, xpath);
final Collection<String> subscriptionIds = getOngoingCmNotificationSubscriptionIds(datastoreType,
cmHandleId, xpath);
subscriptionIds.remove(subscriptionId);
saveSubscriptionDetails(subscriptionAsDataNode, subscriptionIds);
if (isOngoingCmNotificationSubscription(datastoreType, cmHandleId, xpath)) {
log.info("There are subscribers left for the following cps path {} :",
CM_SUBSCRIPTION_CPS_PATH_QUERY.formatted(datastoreType.getDatastoreName(), cmHandleId,
escapeQuotesByDoublingThem(xpath)));
} else {
log.info("No subscribers left for the following cps path {} :",
CM_SUBSCRIPTION_CPS_PATH_QUERY.formatted(datastoreType.getDatastoreName(), cmHandleId,
escapeQuotesByDoublingThem(xpath)));
deleteListOfSubscriptionsFor(datastoreType, cmHandleId, xpath);
}
}
private void deleteListOfSubscriptionsFor(final DatastoreType datastoreType, final String cmHandleId,
final String xpath) {
cpsDataService.deleteDataNode(NCMP_DATASPACE_NAME, SUBSCRIPTION_ANCHOR_NAME,
CM_SUBSCRIPTION_CPS_PATH_QUERY.formatted(datastoreType.getDatastoreName(), cmHandleId,
escapeQuotesByDoublingThem(xpath)),
OffsetDateTime.now());
}
private DataNode getSubscriptionAsDataNode(final DatastoreType datastoreType, final String cmHandleId,
final String xpath) {
return cpsQueryService.queryDataNodes(NCMP_DATASPACE_NAME, SUBSCRIPTION_ANCHOR_NAME,
CM_SUBSCRIPTION_CPS_PATH_QUERY.formatted(datastoreType.getDatastoreName(), cmHandleId,
escapeQuotesByDoublingThem(xpath)),
OMIT_DESCENDANTS).iterator().next();
}
private void addNewSubscriptionViaDatastore(final DatastoreType datastoreType, final String cmHandleId,
final String xpath, final String newSubscriptionId) {
final String parentXpath = "/datastores/datastore[@name='%s']/cm-handles"
.formatted(datastoreType.getDatastoreName());
final String subscriptionAsJson = String.format("{\"cm-handle\":[{\"id\":\"%s\",\"filters\":{\"filter\":"
+ "[{\"xpath\":\"%s\",\"subscriptionIds\":[\"%s\"]}]}}]}", cmHandleId, xpath, newSubscriptionId);
cpsDataService.saveData(NCMP_DATASPACE_NAME, SUBSCRIPTION_ANCHOR_NAME, parentXpath, subscriptionAsJson,
OffsetDateTime.now(), ContentType.JSON);
}
private void saveSubscriptionDetails(final DataNode subscriptionDetailsAsDataNode,
final Collection<String> subscriptionIds) {
final Map<String, Serializable> subscriptionDetailsAsMap = new HashMap<>();
subscriptionDetailsAsMap.put("xpath", subscriptionDetailsAsDataNode.getLeaves().get("xpath"));
subscriptionDetailsAsMap.put("subscriptionIds", (Serializable) subscriptionIds);
final String parentXpath = CpsPathUtil.getNormalizedParentXpath(subscriptionDetailsAsDataNode.getXpath());
final String subscriptionDetailsAsJson = "{\"filter\":["
+ jsonObjectMapper.asJsonString(subscriptionDetailsAsMap).replace("'", "\"") + "]}";
cpsDataService.updateNodeLeaves(NCMP_DATASPACE_NAME, SUBSCRIPTION_ANCHOR_NAME, parentXpath,
subscriptionDetailsAsJson, OffsetDateTime.now());
}
private static String escapeQuotesByDoublingThem(final String inputXpath) {
return inputXpath.replace("'", "''");
}
}
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