cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/events/cmsubscription/service/CmNotificationSubscriptionPersistenceServiceImpl.java

   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.api.impl.events.cmsubscription.service;
  22
  23 import static org.onap.cps.spi.FetchDescendantsOption.OMIT_DESCENDANTS;
  24
  25 import java.io.Serializable;
  26 import java.time.OffsetDateTime;
  27 import java.util.ArrayList;
  28 import java.util.Collection;
  29 import java.util.Collections;
  30 import java.util.HashMap;
  31 import java.util.List;
  32 import java.util.Map;
  33 import lombok.RequiredArgsConstructor;
  34 import lombok.extern.slf4j.Slf4j;
  35 import org.onap.cps.api.CpsDataService;
  36 import org.onap.cps.api.CpsQueryService;
  37 import org.onap.cps.cpspath.parser.CpsPathUtil;
  38 import org.onap.cps.ncmp.api.impl.operations.DatastoreType;
  39 import org.onap.cps.spi.model.DataNode;
  40 import org.onap.cps.utils.ContentType;
  41 import org.onap.cps.utils.JsonObjectMapper;
  42 import org.springframework.stereotype.Service;
  43
  44 @Slf4j
  45 @Service
  46 @RequiredArgsConstructor
  47 public class CmNotificationSubscriptionPersistenceServiceImpl implements CmNotificationSubscriptionPersistenceService {
  48
  49     private static final String SUBSCRIPTION_ANCHOR_NAME = "cm-data-subscriptions";
  50     private static final String CM_SUBSCRIPTION_CPS_PATH_QUERY = """
  51             /datastores/datastore[@name='%s']/cm-handles/cm-handle[@id='%s']/filters/filter[@xpath='%s']
  52             """.trim();
  53     private static final String SUBSCRIPTION_IDS_CPS_PATH_QUERY = """
  54             //filter/subscriptionIds[text()='%s']
  55             """.trim();
  56
  57     private final JsonObjectMapper jsonObjectMapper;
  58     private final CpsQueryService cpsQueryService;
  59     private final CpsDataService cpsDataService;
  60
  61     @Override
  62     public boolean isOngoingCmNotificationSubscription(final DatastoreType datastoreType, final String cmHandleId,
  63             final String xpath) {
  64         return !getOngoingCmNotificationSubscriptionIds(datastoreType, cmHandleId, xpath).isEmpty();
  65     }
  66
  67     @Override
  68     public boolean isUniqueSubscriptionId(final String subscriptionId) {
  69         return cpsQueryService.queryDataNodes(NCMP_DATASPACE_NAME, SUBSCRIPTION_ANCHOR_NAME,
  70                 SUBSCRIPTION_IDS_CPS_PATH_QUERY.formatted(subscriptionId),
  71                 OMIT_DESCENDANTS).isEmpty();
  72     }
  73
  74     @Override
  75     public Collection<String> getOngoingCmNotificationSubscriptionIds(final DatastoreType datastoreType,
  76             final String cmHandleId, final String xpath) {
  77
  78         final String isOngoingCmSubscriptionCpsPathQuery =
  79                 CM_SUBSCRIPTION_CPS_PATH_QUERY.formatted(datastoreType.getDatastoreName(), cmHandleId,
  80                         escapeQuotesByDoublingThem(xpath));
  81         final Collection<DataNode> existingNodes =
  82                 cpsQueryService.queryDataNodes(NCMP_DATASPACE_NAME, CM_SUBSCRIPTIONS_ANCHOR_NAME,
  83                         isOngoingCmSubscriptionCpsPathQuery, OMIT_DESCENDANTS);
  84         if (existingNodes.isEmpty()) {
  85             return Collections.emptyList();
  86         }
  87         return (List<String>) existingNodes.iterator().next().getLeaves().get("subscriptionIds");
  88     }
  89
  90     @Override
  91     public void addOrUpdateCmNotificationSubscription(final DatastoreType datastoreType, final String cmHandleId,
  92                                                       final String xpath, final String newSubscriptionId) {
  93         if (isOngoingCmNotificationSubscription(datastoreType, cmHandleId, xpath)) {
  94             final DataNode existingFilterNode =
  95                     cpsQueryService.queryDataNodes(NCMP_DATASPACE_NAME, SUBSCRIPTION_ANCHOR_NAME,
  96                             CM_SUBSCRIPTION_CPS_PATH_QUERY.formatted(datastoreType.getDatastoreName(), cmHandleId,
  97                                     escapeQuotesByDoublingThem(xpath)),
  98                             OMIT_DESCENDANTS).iterator().next();
  99             final Collection<String> existingSubscriptionIds = getOngoingCmNotificationSubscriptionIds(datastoreType,
 100                     cmHandleId, xpath);
 101             if (!existingSubscriptionIds.contains(newSubscriptionId)) {
 102                 updateListOfSubscribers(existingSubscriptionIds, newSubscriptionId, existingFilterNode);
 103             }
 104         } else {
 105             addNewSubscriptionViaDatastore(datastoreType, cmHandleId, xpath, newSubscriptionId);
 106         }
 107     }
 108
 109     private void addNewSubscriptionViaDatastore(final DatastoreType datastoreType, final String cmHandleId,
 110                                                 final String xpath, final String newSubscriptionId) {
 111         final String parentXpath = "/datastores/datastore[@name='%s']/cm-handles"
 112                 .formatted(datastoreType.getDatastoreName());
 113         final String updatedJson = String.format("{\"cm-handle\":[{\"id\":\"%s\",\"filters\":{\"filter\":"
 114                 + "[{\"xpath\":\"%s\",\"subscriptionIds\":[\"%s\"]}]}}]}", cmHandleId, xpath, newSubscriptionId);
 115         cpsDataService.saveData(NCMP_DATASPACE_NAME, SUBSCRIPTION_ANCHOR_NAME, parentXpath, updatedJson,
 116                 OffsetDateTime.now(), ContentType.JSON);
 117     }
 118
 119     private void updateListOfSubscribers(final Collection<String> existingSubscriptionIds,
 120                                          final String newSubscriptionId, final DataNode existingFilterNode) {
 121         final String parentXpath = CpsPathUtil.getNormalizedParentXpath(existingFilterNode.getXpath());
 122         final List<String> updatedSubscribers = new ArrayList<>(existingSubscriptionIds);
 123         updatedSubscribers.add(newSubscriptionId);
 124         final Map<String, Serializable> updatedLeaves = new HashMap<>();
 125         updatedLeaves.put("xpath", existingFilterNode.getLeaves().get("xpath"));
 126         updatedLeaves.put("subscriptionIds", (Serializable) updatedSubscribers);
 127         final String updatedJson = "{\"filter\":[" + jsonObjectMapper.asJsonString(updatedLeaves) + "]}";
 128         cpsDataService.updateNodeLeaves(NCMP_DATASPACE_NAME, SUBSCRIPTION_ANCHOR_NAME, parentXpath, updatedJson,
 129                 OffsetDateTime.now());
 130     }
 131
 132     private static String escapeQuotesByDoublingThem(final String inputXpath) {
 133         return inputXpath.replace("'", "''");
 134     }
 135 }