1 files changed, 204 insertions, 0 deletions
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/events/deprecated/cmsubscription/CmSubscriptionNcmpInEventForwarder.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/events/deprecated/cmsubscription/CmSubscriptionNcmpInEventForwarder.java
new file mode 100644
index 000000000..ae192c439
--- /dev/null
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/events/deprecated/cmsubscription/CmSubscriptionNcmpInEventForwarder.java
@@ -0,0 +1,204 @@
+/*
+ * ============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.events.deprecated.cmsubscription;
+
+import com.hazelcast.map.IMap;
+import io.cloudevents.CloudEvent;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.onap.cps.ncmp.api.impl.config.embeddedcache.ForwardedSubscriptionEventCacheConfig;
+import org.onap.cps.ncmp.api.impl.deprecated.subscriptions.SubscriptionPersistence;
+import org.onap.cps.ncmp.api.impl.deprecated.subscriptions.SubscriptionStatus;
+import org.onap.cps.ncmp.api.impl.events.EventsPublisher;
+import org.onap.cps.ncmp.api.impl.inventory.InventoryPersistence;
+import org.onap.cps.ncmp.api.impl.utils.CmSubscriptionEventCloudMapper;
+import org.onap.cps.ncmp.api.impl.utils.DmiServiceNameOrganizer;
+import org.onap.cps.ncmp.api.impl.yangmodels.YangModelCmHandle;
+import org.onap.cps.ncmp.api.impl.yangmodels.YangModelSubscriptionEvent;
+import org.onap.cps.ncmp.api.models.CmSubscriptionEvent;
+import org.onap.cps.ncmp.events.cmsubscription1_0_0.client_to_ncmp.CmSubscriptionNcmpInEvent;
+import org.onap.cps.ncmp.events.cmsubscription1_0_0.ncmp_to_dmi.CmHandle;
+import org.onap.cps.ncmp.events.cmsubscription1_0_0.ncmp_to_dmi.CmSubscriptionDmiInEvent;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+
+@Component
+@Slf4j
+@RequiredArgsConstructor
+public class CmSubscriptionNcmpInEventForwarder {
+
+    private static final Pattern REGEX_TO_EXTRACT_DOMAIN_FROM_URL_EXCLUDING_PORT =
+            Pattern.compile("http[s]?:\\/\\/(?:www\\.)?([^\\/:]+):{0,1}[0-9]{0,5}");
+
+    private final InventoryPersistence inventoryPersistence;
+    private final EventsPublisher<CloudEvent> eventsPublisher;
+    private final IMap<String, Set<String>> forwardedSubscriptionEventCache;
+    private final CmSubscriptionNcmpOutEventPublisher cmSubscriptionNcmpOutEventPublisher;
+    private final CmSubscriptionNcmpInEventMapper cmSubscriptionNcmpInEventMapper;
+    private final CmSubscriptionEventCloudMapper cmSubscriptionEventCloudMapper;
+    private final CmSubscriptionNcmpInEventToCmSubscriptionDmiInEventMapper
+            cmSubscriptionNcmpInEventToCmSubscriptionDmiInEventMapper;
+    private final SubscriptionPersistence subscriptionPersistence;
+    private final ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
+    @Value("${app.ncmp.avc.subscription-forward-topic-prefix}")
+    private String dmiAvcSubscriptionTopicPrefix;
+
+    @Value("${ncmp.timers.subscription-forwarding.dmi-response-timeout-ms:30000}")
+    private int dmiResponseTimeoutInMs;
+
+    /**
+     * Forward subscription event.
+     *
+     * @param cmSubscriptionNcmpInEvent the event to be forwarded
+     */
+    public void forwardCreateSubscriptionEvent(final CmSubscriptionNcmpInEvent cmSubscriptionNcmpInEvent,
+            final String eventType) {
+        final List<String> cmHandleTargets = cmSubscriptionNcmpInEvent.getData().getPredicates().getTargets();
+        if (cmHandleTargets == null || cmHandleTargets.isEmpty() || cmHandleTargets.stream()
+                .anyMatch(id -> (id).contains("*"))) {
+            throw new UnsupportedOperationException(
+                    "CMHandle targets are required. \"Wildcard\" operations are not yet supported");
+        }
+        final Collection<YangModelCmHandle> yangModelCmHandles =
+                inventoryPersistence.getYangModelCmHandles(cmHandleTargets);
+        final Map<String, Map<String, Map<String, String>>> dmiPropertiesPerCmHandleIdPerServiceName =
+                DmiServiceNameOrganizer.getDmiPropertiesPerCmHandleIdPerServiceName(yangModelCmHandles);
+        findDmisAndRespond(cmSubscriptionNcmpInEvent, eventType, cmHandleTargets,
+                dmiPropertiesPerCmHandleIdPerServiceName);
+    }
+
+    private void findDmisAndRespond(final CmSubscriptionNcmpInEvent cmSubscriptionNcmpInEvent, final String eventType,
+            final List<String> cmHandleTargetsAsStrings,
+            final Map<String, Map<String, Map<String, String>>> dmiPropertiesPerCmHandleIdPerServiceName) {
+
+        final CmSubscriptionEvent cmSubscriptionEvent = new CmSubscriptionEvent();
+        cmSubscriptionEvent.setSubscriptionName(cmSubscriptionNcmpInEvent.getData().getSubscription().getName());
+        cmSubscriptionEvent.setClientId(cmSubscriptionNcmpInEvent.getData().getSubscription().getClientID());
+
+        final List<String> cmHandlesThatExistsInDb =
+                dmiPropertiesPerCmHandleIdPerServiceName.entrySet().stream().map(Map.Entry::getValue).map(Map::keySet)
+                        .flatMap(Set::stream).collect(Collectors.toList());
+
+        final List<String> targetCmHandlesDoesNotExistInDb = new ArrayList<>(cmHandleTargetsAsStrings);
+        targetCmHandlesDoesNotExistInDb.removeAll(cmHandlesThatExistsInDb);
+
+        final Set<String> dmisToRespond = new HashSet<>(dmiPropertiesPerCmHandleIdPerServiceName.keySet());
+
+        if (dmisToRespond.isEmpty() || !targetCmHandlesDoesNotExistInDb.isEmpty()) {
+            updatesCmHandlesToRejectedAndPersistSubscriptionEvent(cmSubscriptionNcmpInEvent,
+                    targetCmHandlesDoesNotExistInDb);
+        }
+        if (dmisToRespond.isEmpty()) {
+            cmSubscriptionNcmpOutEventPublisher.sendResponse(cmSubscriptionEvent,
+                    "subscriptionCreatedStatus");
+        } else {
+            startResponseTimeout(cmSubscriptionEvent, dmisToRespond);
+            final CmSubscriptionDmiInEvent cmSubscriptionDmiInEvent =
+                    cmSubscriptionNcmpInEventToCmSubscriptionDmiInEventMapper.toCmSubscriptionDmiInEvent(
+                            cmSubscriptionNcmpInEvent);
+            forwardEventToDmis(dmiPropertiesPerCmHandleIdPerServiceName, cmSubscriptionDmiInEvent, eventType);
+        }
+    }
+
+    private void startResponseTimeout(final CmSubscriptionEvent cmSubscriptionEvent,
+                                      final Set<String> dmisToRespond) {
+        final String subscriptionClientId = cmSubscriptionEvent.getClientId();
+        final String subscriptionName = cmSubscriptionEvent.getSubscriptionName();
+        final String subscriptionEventId = subscriptionClientId + subscriptionName;
+
+        forwardedSubscriptionEventCache.put(subscriptionEventId, dmisToRespond,
+                ForwardedSubscriptionEventCacheConfig.SUBSCRIPTION_FORWARD_STARTED_TTL_SECS, TimeUnit.SECONDS);
+        final ResponseTimeoutTask responseTimeoutTask =
+            new ResponseTimeoutTask(forwardedSubscriptionEventCache, cmSubscriptionNcmpOutEventPublisher,
+                    cmSubscriptionEvent);
+
+        executorService.schedule(responseTimeoutTask, dmiResponseTimeoutInMs, TimeUnit.MILLISECONDS);
+    }
+
+    private void forwardEventToDmis(final Map<String, Map<String, Map<String, String>>> dmiNameCmHandleMap,
+            final CmSubscriptionDmiInEvent cmSubscriptionDmiInEvent, final String eventType) {
+        dmiNameCmHandleMap.forEach((dmiName, cmHandlePropertiesMap) -> {
+            final List<CmHandle> cmHandleTargets = cmHandlePropertiesMap.entrySet().stream().map(
+                    cmHandleAndProperties -> {
+                        final CmHandle cmHandle = new CmHandle();
+                        cmHandle.setId(cmHandleAndProperties.getKey());
+                        cmHandle.setAdditionalProperties(cmHandleAndProperties.getValue());
+                        return cmHandle;
+                    }).collect(Collectors.toList());
+
+            cmSubscriptionDmiInEvent.getData().getPredicates().setTargets(cmHandleTargets);
+            final String dmiNameSuffix = toValidTopicSuffix(dmiName);
+            final String eventKey = createEventKey(cmSubscriptionDmiInEvent, dmiNameSuffix);
+            final String dmiAvcSubscriptionTopic = dmiAvcSubscriptionTopicPrefix + dmiNameSuffix;
+
+            final CloudEvent cmSubscriptionDmiInCloudEvent =
+                    cmSubscriptionEventCloudMapper.toCloudEvent(cmSubscriptionDmiInEvent, eventKey, eventType);
+            eventsPublisher.publishCloudEvent(dmiAvcSubscriptionTopic, eventKey, cmSubscriptionDmiInCloudEvent);
+        });
+    }
+
+    private String createEventKey(final CmSubscriptionDmiInEvent cmSubscriptionDmiInEvent, final String dmiName) {
+        return cmSubscriptionDmiInEvent.getData().getSubscription().getClientID() + "-"
+                       + cmSubscriptionDmiInEvent.getData().getSubscription().getName() + "-" + dmiName;
+    }
+
+    private void updatesCmHandlesToRejectedAndPersistSubscriptionEvent(
+            final CmSubscriptionNcmpInEvent cmSubscriptionNcmpInEvent,
+            final List<String> targetCmHandlesDoesNotExistInDb) {
+        final YangModelSubscriptionEvent yangModelSubscriptionEvent =
+                cmSubscriptionNcmpInEventMapper.toYangModelSubscriptionEvent(cmSubscriptionNcmpInEvent);
+        yangModelSubscriptionEvent.getPredicates()
+                .setTargetCmHandles(findRejectedCmHandles(targetCmHandlesDoesNotExistInDb, yangModelSubscriptionEvent));
+        subscriptionPersistence.saveSubscriptionEvent(yangModelSubscriptionEvent);
+    }
+
+    private static List<YangModelSubscriptionEvent.TargetCmHandle> findRejectedCmHandles(
+            final List<String> targetCmHandlesDoesNotExistInDb,
+            final YangModelSubscriptionEvent yangModelSubscriptionEvent) {
+        return yangModelSubscriptionEvent.getPredicates().getTargetCmHandles().stream()
+                    .filter(targetCmHandle -> targetCmHandlesDoesNotExistInDb.contains(targetCmHandle.getCmHandleId()))
+                    .map(target -> new YangModelSubscriptionEvent.TargetCmHandle(target.getCmHandleId(),
+                                    SubscriptionStatus.REJECTED, "Targets not found"))
+                .collect(Collectors.toList());
+    }
+
+    /*
+    CPS-1979 : DmiName can be a URL , which is not a valid topic name.
+               Hence just taking the domain name(excluding port) information to be part of the topic name.
+     */
+    private String toValidTopicSuffix(final String dmiName) {
+        final Matcher matcher = REGEX_TO_EXTRACT_DOMAIN_FROM_URL_EXCLUDING_PORT.matcher(dmiName);
+        return matcher.find() ? matcher.group(1) : dmiName;
+    }
+}