gerrit.onap Code Review - cps.git/blob

   1 /*
   2  * ============LICENSE_START=======================================================
   3  *  Copyright (C) 2024 Nordix Foundation
   4  *  ================================================================================
   5  *  Licensed under the Apache License, Version 2.0 (the "License");
   6  *  you may not use this file except in compliance with the License.
   7  *  You may obtain a copy of the License at
   8  *
   9  *        http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  *  Unless required by applicable law or agreed to in writing, software
  12  *  distributed under the License is distributed on an "AS IS" BASIS,
  13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  *  See the License for the specific language governing permissions and
  15  *  limitations under the License.
  16  *
  17  *  SPDX-License-Identifier: Apache-2.0
  18  *  ============LICENSE_END=========================================================
  19  */
  20
  21 package org.onap.cps.ncmp.impl.cmnotificationsubscription.utils;
  22
  23 import static org.onap.cps.spi.FetchDescendantsOption.DIRECT_CHILDREN_ONLY;
  24 import static org.onap.cps.spi.FetchDescendantsOption.OMIT_DESCENDANTS;
  25
  26 import java.io.Serializable;
  27 import java.time.OffsetDateTime;
  28 import java.util.Collection;
  29 import java.util.Collections;
  30 import java.util.List;
  31 import java.util.Map;
  32 import lombok.RequiredArgsConstructor;
  33 import lombok.extern.slf4j.Slf4j;
  34 import org.onap.cps.api.CpsDataService;
  35 import org.onap.cps.api.CpsQueryService;
  36 import org.onap.cps.ncmp.api.data.models.DatastoreType;
  37 import org.onap.cps.spi.model.DataNode;
  38 import org.onap.cps.utils.ContentType;
  39 import org.onap.cps.utils.JsonObjectMapper;
  40 import org.springframework.stereotype.Service;
  41
  42 @Slf4j
  43 @Service
  44 @RequiredArgsConstructor
  45 public class CmSubscriptionPersistenceService {
  46
  47     private static final String NCMP_DATASPACE_NAME = "NCMP-Admin";
  48     private static final String CM_SUBSCRIPTIONS_ANCHOR_NAME = "cm-data-subscriptions";
  49
  50     private static final String SUBSCRIPTION_ANCHOR_NAME = "cm-data-subscriptions";
  51     private static final String CPS_PATH_QUERY_FOR_CM_SUBSCRIPTION_WITH_DATASTORE_AND_CMHANDLE = """
  52             /datastores/datastore[@name='%s']/cm-handles/cm-handle[@id='%s']
  53             """.trim();
  54     private static final String CPS_PATH_QUERY_FOR_CM_SUBSCRIPTION_FILTERS_WITH_DATASTORE_AND_CMHANDLE =
  55             CPS_PATH_QUERY_FOR_CM_SUBSCRIPTION_WITH_DATASTORE_AND_CMHANDLE + "/filters";
  56
  57     private static final String CPS_PATH_QUERY_FOR_CM_SUBSCRIPTION_WITH_DATASTORE_CMHANDLE_AND_XPATH =
  58             CPS_PATH_QUERY_FOR_CM_SUBSCRIPTION_FILTERS_WITH_DATASTORE_AND_CMHANDLE + "/filter[@xpath='%s']";
  59
  60
  61     private static final String CPS_PATH_QUERY_FOR_CM_SUBSCRIPTION_WITH_ID = """
  62             //filter/subscriptionIds[text()='%s']
  63             """.trim();
  64
  65     private final JsonObjectMapper jsonObjectMapper;
  66     private final CpsQueryService cpsQueryService;
  67     private final CpsDataService cpsDataService;
  68
  69     /**
  70      * Check if we have an ongoing cm subscription based on the parameters.
  71      *
  72      * @param datastoreType the susbcription target datastore type
  73      * @param cmHandleId    the id of the cm handle for the susbcription
  74      * @param xpath         the target xpath
  75      * @return true for ongoing cmsubscription , otherwise false
  76      */
  77     public boolean isOngoingCmSubscription(final DatastoreType datastoreType, final String cmHandleId,
  78             final String xpath) {
  79         return !getOngoingCmSubscriptionIds(datastoreType, cmHandleId, xpath).isEmpty();
  80     }
  81
  82     /**
  83      * Check if the subscription ID is unique against ongoing subscriptions.
  84      *
  85      * @param subscriptionId subscription ID
  86      * @return true if subscriptionId is not used in active subscriptions, otherwise false
  87      */
  88     public boolean isUniqueSubscriptionId(final String subscriptionId) {
  89         return cpsQueryService.queryDataNodes(NCMP_DATASPACE_NAME, SUBSCRIPTION_ANCHOR_NAME,
  90                 CPS_PATH_QUERY_FOR_CM_SUBSCRIPTION_WITH_ID.formatted(subscriptionId), OMIT_DESCENDANTS).isEmpty();
  91     }
  92
  93     /**
  94      * Get all ongoing cm notification subscription based on the parameters.
  95      *
  96      * @param datastoreType the susbcription target datastore type
  97      * @param cmHandleId    the id of the cm handle for the susbcription
  98      * @param xpath         the target xpath
  99      * @return collection of subscription ids of ongoing cm notification subscription
 100      */
 101     public Collection<String> getOngoingCmSubscriptionIds(final DatastoreType datastoreType,
 102             final String cmHandleId, final String xpath) {
 103
 104         final String isOngoingCmSubscriptionCpsPathQuery =
 105                 CPS_PATH_QUERY_FOR_CM_SUBSCRIPTION_WITH_DATASTORE_CMHANDLE_AND_XPATH.formatted(
 106                         datastoreType.getDatastoreName(), cmHandleId, escapeQuotesByDoublingThem(xpath));
 107         final Collection<DataNode> existingNodes =
 108                 cpsQueryService.queryDataNodes(NCMP_DATASPACE_NAME, CM_SUBSCRIPTIONS_ANCHOR_NAME,
 109                         isOngoingCmSubscriptionCpsPathQuery, OMIT_DESCENDANTS);
 110         if (existingNodes.isEmpty()) {
 111             return Collections.emptyList();
 112         }
 113         return (List<String>) existingNodes.iterator().next().getLeaves().get("subscriptionIds");
 114     }
 115
 116     /**
 117      * Add cm notification subscription.
 118      *
 119      * @param datastoreType     the susbcription target datastore type
 120      * @param cmHandleId        the id of the cm handle for the susbcription
 121      * @param xpath             the target xpath
 122      * @param newSubscriptionId subscription id to be added
 123      */
 124     public void addCmSubscription(final DatastoreType datastoreType, final String cmHandleId,
 125             final String xpath, final String newSubscriptionId) {
 126         final Collection<String> subscriptionIds =
 127                 getOngoingCmSubscriptionIds(datastoreType, cmHandleId, xpath);
 128         if (subscriptionIds.isEmpty()) {
 129             addFirstSubscriptionForDatastoreCmHandleAndXpath(datastoreType, cmHandleId, xpath, newSubscriptionId);
 130         } else if (!subscriptionIds.contains(newSubscriptionId)) {
 131             subscriptionIds.add(newSubscriptionId);
 132             saveSubscriptionDetails(datastoreType, cmHandleId, xpath, subscriptionIds);
 133         }
 134     }
 135
 136     /**
 137      * Remove cm notification Subscription.
 138      *
 139      * @param datastoreType  the susbcription target datastore type
 140      * @param cmHandleId     the id of the cm handle for the susbcription
 141      * @param xpath          the target xpath
 142      * @param subscriptionId subscription id to remove
 143      */
 144     public void removeCmSubscription(final DatastoreType datastoreType, final String cmHandleId,
 145             final String xpath, final String subscriptionId) {
 146         final Collection<String> subscriptionIds =
 147                 getOngoingCmSubscriptionIds(datastoreType, cmHandleId, xpath);
 148         if (subscriptionIds.remove(subscriptionId)) {
 149             saveSubscriptionDetails(datastoreType, cmHandleId, xpath, subscriptionIds);
 150             log.info("There are subscribers left for the following cps path {} :",
 151                     CPS_PATH_QUERY_FOR_CM_SUBSCRIPTION_WITH_DATASTORE_CMHANDLE_AND_XPATH.formatted(
 152                             datastoreType.getDatastoreName(), cmHandleId, escapeQuotesByDoublingThem(xpath)));
 153             if (subscriptionIds.isEmpty()) {
 154                 log.info("No subscribers left for the following cps path {} :",
 155                         CPS_PATH_QUERY_FOR_CM_SUBSCRIPTION_WITH_DATASTORE_CMHANDLE_AND_XPATH.formatted(
 156                                 datastoreType.getDatastoreName(), cmHandleId, escapeQuotesByDoublingThem(xpath)));
 157                 deleteListOfSubscriptionsFor(datastoreType, cmHandleId, xpath);
 158             }
 159         }
 160     }
 161
 162     private void deleteListOfSubscriptionsFor(final DatastoreType datastoreType, final String cmHandleId,
 163             final String xpath) {
 164         cpsDataService.deleteDataNode(NCMP_DATASPACE_NAME, SUBSCRIPTION_ANCHOR_NAME,
 165                 CPS_PATH_QUERY_FOR_CM_SUBSCRIPTION_WITH_DATASTORE_CMHANDLE_AND_XPATH.formatted(
 166                         datastoreType.getDatastoreName(), cmHandleId, escapeQuotesByDoublingThem(xpath)),
 167                 OffsetDateTime.now());
 168         final Collection<DataNode> existingFiltersForCmHandle =
 169                 cpsQueryService.queryDataNodes(NCMP_DATASPACE_NAME, CM_SUBSCRIPTIONS_ANCHOR_NAME,
 170                                 CPS_PATH_QUERY_FOR_CM_SUBSCRIPTION_FILTERS_WITH_DATASTORE_AND_CMHANDLE.formatted(
 171                                         datastoreType.getDatastoreName(), cmHandleId),
 172                                 DIRECT_CHILDREN_ONLY).iterator().next()
 173                         .getChildDataNodes();
 174         if (existingFiltersForCmHandle.isEmpty()) {
 175             removeCmHandleFromDatastore(datastoreType.getDatastoreName(), cmHandleId);
 176         }
 177     }
 178
 179     private void removeCmHandleFromDatastore(final String datastoreName, final String cmHandleId) {
 180         cpsDataService.deleteDataNode(NCMP_DATASPACE_NAME, SUBSCRIPTION_ANCHOR_NAME,
 181                 CPS_PATH_QUERY_FOR_CM_SUBSCRIPTION_WITH_DATASTORE_AND_CMHANDLE.formatted(datastoreName, cmHandleId),
 182                 OffsetDateTime.now());
 183     }
 184
 185     private boolean isFirstSubscriptionForCmHandle(final DatastoreType datastoreType, final String cmHandleId) {
 186         return cpsQueryService.queryDataNodes(NCMP_DATASPACE_NAME, CM_SUBSCRIPTIONS_ANCHOR_NAME,
 187                 CPS_PATH_QUERY_FOR_CM_SUBSCRIPTION_FILTERS_WITH_DATASTORE_AND_CMHANDLE.formatted(
 188                         datastoreType.getDatastoreName(), cmHandleId), OMIT_DESCENDANTS).isEmpty();
 189     }
 190
 191     private void addFirstSubscriptionForDatastoreCmHandleAndXpath(final DatastoreType datastoreType,
 192             final String cmHandleId, final String xpath, final String subscriptionId) {
 193         final Collection<String> newSubscriptionList = Collections.singletonList(subscriptionId);
 194         final String subscriptionDetailsAsJson = getSubscriptionDetailsAsJson(xpath, newSubscriptionList);
 195         if (isFirstSubscriptionForCmHandle(datastoreType, cmHandleId)) {
 196             final String parentXpath =
 197                     "/datastores/datastore[@name='%s']/cm-handles".formatted(datastoreType.getDatastoreName());
 198             final String subscriptionAsJson =
 199                     String.format("{\"cm-handle\":[{\"id\":\"%s\",\"filters\":%s}]}", cmHandleId,
 200                             subscriptionDetailsAsJson);
 201             cpsDataService.saveData(NCMP_DATASPACE_NAME, SUBSCRIPTION_ANCHOR_NAME, parentXpath, subscriptionAsJson,
 202                     OffsetDateTime.now(), ContentType.JSON);
 203         } else {
 204             cpsDataService.saveListElements(NCMP_DATASPACE_NAME, CM_SUBSCRIPTIONS_ANCHOR_NAME,
 205                     CPS_PATH_QUERY_FOR_CM_SUBSCRIPTION_FILTERS_WITH_DATASTORE_AND_CMHANDLE.formatted(
 206                             datastoreType.getDatastoreName(), cmHandleId), subscriptionDetailsAsJson,
 207                     OffsetDateTime.now());
 208         }
 209     }
 210
 211     private void saveSubscriptionDetails(final DatastoreType datastoreType, final String cmHandleId, final String xpath,
 212             final Collection<String> subscriptionIds) {
 213         final String subscriptionDetailsAsJson = getSubscriptionDetailsAsJson(xpath, subscriptionIds);
 214         cpsDataService.updateNodeLeaves(NCMP_DATASPACE_NAME, CM_SUBSCRIPTIONS_ANCHOR_NAME,
 215                 CPS_PATH_QUERY_FOR_CM_SUBSCRIPTION_FILTERS_WITH_DATASTORE_AND_CMHANDLE.formatted(
 216                         datastoreType.getDatastoreName(), cmHandleId), subscriptionDetailsAsJson, OffsetDateTime.now(),
 217                 ContentType.JSON);
 218     }
 219
 220     private String getSubscriptionDetailsAsJson(final String xpath, final Collection<String> subscriptionIds) {
 221         final Map<String, Serializable> subscriptionDetailsAsMap =
 222                 Map.of("xpath", xpath, "subscriptionIds", (Serializable) subscriptionIds);
 223         return "{\"filter\":[" + jsonObjectMapper.asJsonString(subscriptionDetailsAsMap) + "]}";
 224     }
 225
 226     private static String escapeQuotesByDoublingThem(final String inputXpath) {
 227         return inputXpath.replace("'", "''");
 228     }
 229
 230 }
 231