cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/events/avcsubscription/SubscriptionEventForwarder.java

   1 /*
   2  * ============LICENSE_START=======================================================
   3  *  Copyright (C) 2023 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.avcsubscription;
  22
  23 import com.hazelcast.map.IMap;
  24 import java.util.Collection;
  25 import java.util.Collections;
  26 import java.util.HashSet;
  27 import java.util.List;
  28 import java.util.Map;
  29 import java.util.Objects;
  30 import java.util.Set;
  31 import java.util.concurrent.Executors;
  32 import java.util.concurrent.ScheduledExecutorService;
  33 import java.util.concurrent.TimeUnit;
  34 import java.util.stream.Collectors;
  35 import lombok.RequiredArgsConstructor;
  36 import lombok.extern.slf4j.Slf4j;
  37 import org.onap.cps.ncmp.api.impl.event.avc.ResponseTimeoutTask;
  38 import org.onap.cps.ncmp.api.impl.events.EventsPublisher;
  39 import org.onap.cps.ncmp.api.impl.utils.DmiServiceNameOrganizer;
  40 import org.onap.cps.ncmp.api.impl.yangmodels.YangModelCmHandle;
  41 import org.onap.cps.ncmp.api.inventory.InventoryPersistence;
  42 import org.onap.cps.ncmp.event.model.SubscriptionEvent;
  43 import org.onap.cps.spi.exceptions.OperationNotYetSupportedException;
  44 import org.springframework.beans.factory.annotation.Value;
  45 import org.springframework.stereotype.Component;
  46
  47
  48 @Component
  49 @Slf4j
  50 @RequiredArgsConstructor
  51 public class SubscriptionEventForwarder {
  52
  53     private final InventoryPersistence inventoryPersistence;
  54     private final EventsPublisher<SubscriptionEvent> eventsPublisher;
  55     private final IMap<String, Set<String>> forwardedSubscriptionEventCache;
  56
  57     private final ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
  58
  59     private static final String DMI_AVC_SUBSCRIPTION_TOPIC_PREFIX = "ncmp-dmi-cm-avc-subscription-";
  60
  61     @Value("${ncmp.timers.subscription-forwarding.dmi-response-timeout-ms:30000}")
  62     private int dmiResponseTimeoutInMs;
  63
  64     /**
  65      * Forward subscription event.
  66      *
  67      * @param subscriptionEvent the event to be forwarded
  68      */
  69     public void forwardCreateSubscriptionEvent(final SubscriptionEvent subscriptionEvent) {
  70         final List<Object> cmHandleTargets = subscriptionEvent.getEvent().getPredicates().getTargets();
  71         if (cmHandleTargets == null || cmHandleTargets.isEmpty()
  72                 || cmHandleTargets.stream().anyMatch(id -> ((String) id).contains("*"))) {
  73             throw new OperationNotYetSupportedException(
  74                     "CMHandle targets are required. \"Wildcard\" operations are not yet supported");
  75         }
  76         final List<String> cmHandleTargetsAsStrings = cmHandleTargets.stream().map(
  77                 Objects::toString).collect(Collectors.toList());
  78         final Collection<YangModelCmHandle> yangModelCmHandles =
  79                 inventoryPersistence.getYangModelCmHandles(cmHandleTargetsAsStrings);
  80
  81         final Map<String, Map<String, Map<String, String>>> dmiPropertiesPerCmHandleIdPerServiceName
  82                 = DmiServiceNameOrganizer.getDmiPropertiesPerCmHandleIdPerServiceName(yangModelCmHandles);
  83
  84         final Set<String> dmisToRespond = new HashSet<>(dmiPropertiesPerCmHandleIdPerServiceName.keySet());
  85         startResponseTimeout(subscriptionEvent, dmisToRespond);
  86         forwardEventToDmis(dmiPropertiesPerCmHandleIdPerServiceName, subscriptionEvent);
  87     }
  88
  89     private void forwardEventToDmis(final Map<String, Map<String, Map<String, String>>> dmiNameCmHandleMap,
  90                                     final SubscriptionEvent subscriptionEvent) {
  91         dmiNameCmHandleMap.forEach((dmiName, cmHandlePropertiesMap) -> {
  92             subscriptionEvent.getEvent().getPredicates().setTargets(Collections.singletonList(cmHandlePropertiesMap));
  93             final String eventKey = createEventKey(subscriptionEvent, dmiName);
  94             eventsPublisher.publishEvent(
  95                 DMI_AVC_SUBSCRIPTION_TOPIC_PREFIX + dmiName, eventKey, subscriptionEvent);
  96         });
  97     }
  98
  99     private void startResponseTimeout(final SubscriptionEvent subscriptionEvent, final Set<String> dmisToRespond) {
 100         final String subscriptionEventId = subscriptionEvent.getEvent().getSubscription().getClientID()
 101             + subscriptionEvent.getEvent().getSubscription().getName();
 102
 103         forwardedSubscriptionEventCache.put(subscriptionEventId, dmisToRespond);
 104         final ResponseTimeoutTask responseTimeoutTask =
 105             new ResponseTimeoutTask(forwardedSubscriptionEventCache, subscriptionEventId);
 106         executorService.schedule(responseTimeoutTask, dmiResponseTimeoutInMs, TimeUnit.MILLISECONDS);
 107     }
 108
 109     private String createEventKey(final SubscriptionEvent subscriptionEvent, final String dmiName) {
 110         return subscriptionEvent.getEvent().getSubscription().getClientID()
 111             + "-"
 112             + subscriptionEvent.getEvent().getSubscription().getName()
 113             + "-"
 114             + dmiName;
 115     }
 116
 117 }