Fix the algorithm for device trust level

- Add new method to handle device trust level changes
  in trust level manager
- Change algorithm to find effective trust level for
  each use case
- Separate responsibilities of each function
- Change device heartbeat consumer accordingly

Issue-ID: CPS-1910
Change-Id: I228f82955b224dc4ebfd1b305082e06aac6008d2
Signed-off-by: halil.cakal <halil.cakal@est.tech>

3 files changed, 71 insertions, 36 deletions

diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/trustlevel/DeviceHeartbeatConsumer.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/trustlevel/DeviceHeartbeatConsumer.java
index 45aa631b12..230a370d65 100644
--- a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/trustlevel/DeviceHeartbeatConsumer.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/trustlevel/DeviceHeartbeatConsumer.java
@@ -36,7 +36,6 @@ public class DeviceHeartbeatConsumer {
     private static final String CLOUD_EVENT_ID_HEADER_NAME = "ce_id";
     private final TrustLevelManager trustLevelManager;
 
-
     /**
      * Listening the device heartbeats.
      *
@@ -51,8 +50,8 @@ public class DeviceHeartbeatConsumer {
 
         final DeviceTrustLevel deviceTrustLevel =
             CloudEventMapper.toTargetEvent(deviceHeartbeatConsumerRecord.value(), DeviceTrustLevel.class);
-
-        trustLevelManager.handleUpdateOfTrustLevels(cmHandleId, deviceTrustLevel.getData().getTrustLevel());
+        final TrustLevel newDeviceTrustLevel = TrustLevel.valueOf(deviceTrustLevel.getData().getTrustLevel());
+        trustLevelManager.handleUpdateOfDeviceTrustLevel(cmHandleId, newDeviceTrustLevel);
 
     }
 
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/trustlevel/TrustLevelManager.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/trustlevel/TrustLevelManager.java
index 4df6bd237a..22f18cd243 100644
--- a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/trustlevel/TrustLevelManager.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/trustlevel/TrustLevelManager.java
@@ -20,10 +20,14 @@
 
 package org.onap.cps.ncmp.api.impl.trustlevel;
 
+import java.util.Collection;
 import java.util.Map;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.onap.cps.ncmp.api.impl.events.avc.ncmptoclient.AvcEventPublisher;
+import org.onap.cps.ncmp.api.impl.inventory.InventoryPersistence;
+import org.onap.cps.ncmp.api.impl.operations.RequiredDmiService;
+import org.onap.cps.ncmp.api.impl.yangmodels.YangModelCmHandle;
 import org.springframework.stereotype.Service;
 
 @Slf4j
@@ -32,10 +36,12 @@ import org.springframework.stereotype.Service;
 public class TrustLevelManager {
 
     private final Map<String, TrustLevel> trustLevelPerCmHandle;
-    private final AvcEventPublisher avcEventPublisher;
-    private static final String NO_OLD_VALUE = null;
-    private static final String CHANGED_ATTRIBUTE_NAME = "trustLevel";
+    private final Map<String, TrustLevel> trustLevelPerDmiPlugin;
 
+    private final InventoryPersistence inventoryPersistence;
+    private final AvcEventPublisher avcEventPublisher;
+    private static final String AVC_CHANGED_ATTRIBUTE_NAME = "trustLevel";
+    private static final String AVC_NO_OLD_VALUE = null;
 
     /**
      * Add cmHandles to the cache and publish notification for initial trust level of cmHandles if it is NONE.
@@ -54,37 +60,72 @@ public class TrustLevelManager {
                 }
                 trustLevelPerCmHandle.put(cmHandleId, initialTrustLevel);
                 if (TrustLevel.NONE.equals(initialTrustLevel)) {
-                    sendAvcNotificationEvent(cmHandleId, NO_OLD_VALUE, initialTrustLevel.name());
+                    avcEventPublisher.publishAvcEvent(cmHandleId,
+                        AVC_CHANGED_ATTRIBUTE_NAME,
+                        AVC_NO_OLD_VALUE,
+                        initialTrustLevel.name());
                 }
             }
         }
     }
 
-
     /**
-     * Update a cmHandle in the cache and publish notification if the trust level is different.
+     * Updates trust level of dmi plugin in the cache and publish notification for trust level of cmHandles if it
+     * has changed.
      *
-     * @param cmHandleId    id of the cmHandle being updated
-     * @param newTrustLevel new trust level of the cmHandle being updated
+     * @param dmiServiceName        dmi service name
+     * @param affectedCmHandleIds   cm handle ids belonging to dmi service name
+     * @param newDmiTrustLevel      new trust level of the dmi plugin
      */
-    public void handleUpdateOfTrustLevels(final String cmHandleId, final String newTrustLevel) {
-        final TrustLevel oldTrustLevel = trustLevelPerCmHandle.get(cmHandleId);
-        if (newTrustLevel.equals(oldTrustLevel.name())) {
-            log.debug("The Cm Handle: {} has already the same trust level: {}", cmHandleId, newTrustLevel);
-        } else {
-            trustLevelPerCmHandle.put(cmHandleId, TrustLevel.valueOf(newTrustLevel));
-            sendAvcNotificationEvent(cmHandleId, oldTrustLevel.name(), newTrustLevel);
-            log.info("The new trust level: {} has been updated for Cm Handle: {}", newTrustLevel, cmHandleId);
+    public void handleUpdateOfDmiTrustLevel(final String dmiServiceName,
+                                            final Collection<String> affectedCmHandleIds,
+                                            final TrustLevel newDmiTrustLevel) {
+        final TrustLevel oldDmiTrustLevel  = trustLevelPerDmiPlugin.get(dmiServiceName);
+        trustLevelPerDmiPlugin.put(dmiServiceName, newDmiTrustLevel);
+        for (final String affectedCmHandleId : affectedCmHandleIds) {
+            final TrustLevel deviceTrustLevel = trustLevelPerCmHandle.get(affectedCmHandleId);
+            final TrustLevel oldEffectiveTrustLevel = deviceTrustLevel.getEffectiveTrustLevel(oldDmiTrustLevel);
+            final TrustLevel newEffectiveTrustLevel = deviceTrustLevel.getEffectiveTrustLevel(newDmiTrustLevel);
+            sendAvcNotificationIfRequired(affectedCmHandleId, oldEffectiveTrustLevel, newEffectiveTrustLevel);
         }
     }
 
-    private void sendAvcNotificationEvent(final String cmHandleId,
-                                          final String oldTrustLevel,
-                                          final String newTrustLevel) {
-        avcEventPublisher.publishAvcEvent(cmHandleId,
-                CHANGED_ATTRIBUTE_NAME,
-                oldTrustLevel,
-                newTrustLevel);
+    /**
+     * Updates trust level of device in the cache and publish notification for trust level of device if it has
+     * changed.
+     *
+     * @param cmHandleId            cm handle id
+     * @param newDeviceTrustLevel   new trust level of the device
+     */
+    public void handleUpdateOfDeviceTrustLevel(final String cmHandleId,
+                                               final TrustLevel newDeviceTrustLevel) {
+        final YangModelCmHandle yangModelCmHandle = inventoryPersistence.getYangModelCmHandle(cmHandleId);
+        final String dmiServiceName = yangModelCmHandle.resolveDmiServiceName(RequiredDmiService.DATA);
+
+        final TrustLevel dmiTrustLevel = trustLevelPerDmiPlugin.get(dmiServiceName);
+        final TrustLevel oldDeviceTrustLevel = trustLevelPerCmHandle.get(cmHandleId);
+
+        final TrustLevel oldEffectiveTrustLevel = oldDeviceTrustLevel.getEffectiveTrustLevel(dmiTrustLevel);
+        final TrustLevel newEffectiveTrustLevel = newDeviceTrustLevel.getEffectiveTrustLevel(dmiTrustLevel);
+
+        trustLevelPerCmHandle.put(cmHandleId, newDeviceTrustLevel);
+        sendAvcNotificationIfRequired(cmHandleId, oldEffectiveTrustLevel, newEffectiveTrustLevel);
+    }
+
+    private void sendAvcNotificationIfRequired(final String notificationCandidateCmHandleId,
+                                               final TrustLevel oldEffectiveTrustLevel,
+                                               final TrustLevel newEffectiveTrustLevel) {
+        if (oldEffectiveTrustLevel.equals(newEffectiveTrustLevel)) {
+            log.debug("The Cm Handle: {} has already the same trust level: {}", notificationCandidateCmHandleId,
+                newEffectiveTrustLevel);
+        } else {
+            log.info("The trust level for Cm Handle: {} is now: {} ", notificationCandidateCmHandleId,
+                newEffectiveTrustLevel);
+            avcEventPublisher.publishAvcEvent(notificationCandidateCmHandleId,
+                AVC_CHANGED_ATTRIBUTE_NAME,
+                oldEffectiveTrustLevel.name(),
+                newEffectiveTrustLevel.name());
+        }
     }
 
 }
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/trustlevel/dmiavailability/DmiPluginWatchDog.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/trustlevel/dmiavailability/DmiPluginWatchDog.java
index 9fd096daea..6a272f1c66 100644
--- a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/trustlevel/dmiavailability/DmiPluginWatchDog.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/trustlevel/dmiavailability/DmiPluginWatchDog.java
@@ -38,12 +38,13 @@ public class DmiPluginWatchDog {
 
     private final DmiRestClient dmiRestClient;
     private final NetworkCmProxyDataService networkCmProxyDataService;
+
     private final TrustLevelManager trustLevelManager;
     private final Map<String, TrustLevel> trustLevelPerDmiPlugin;
 
     /**
      * This class monitors the trust level of all DMI plugin by checking the health status
-     * the resulting trustlevel wil be stored in the relevant cache.
+     * the resulting trust level wil be stored in the relevant cache.
      * The @fixedDelayString is the time interval, in milliseconds, between consecutive checks.
      */
     @Scheduled(fixedDelayString = "${ncmp.timers.trust-evel.dmi-availability-watchdog-ms:30000}")
@@ -60,18 +61,12 @@ public class DmiPluginWatchDog {
             } else {
                 newDmiTrustLevel = TrustLevel.NONE;
             }
-
             if (oldDmiTrustLevel.equals(newDmiTrustLevel)) {
-                log.debug("The Dmi Plugin: {} has already the same trust level: {}", dmiServiceName,
-                        newDmiTrustLevel);
+                log.debug("The Dmi Plugin: {} has already the same trust level: {}", dmiServiceName, newDmiTrustLevel);
             } else {
-                trustLevelPerDmiPlugin.put(dmiServiceName, newDmiTrustLevel);
-
-                final Collection<String> notificationCandidateCmHandleIds =
+                final Collection<String> cmHandleIds =
                     networkCmProxyDataService.getAllCmHandleIdsByDmiPluginIdentifier(dmiServiceName);
-                for (final String cmHandleId: notificationCandidateCmHandleIds) {
-                    trustLevelManager.handleUpdateOfTrustLevels(cmHandleId, newDmiTrustLevel.name());
-                }
+                trustLevelManager.handleUpdateOfDmiTrustLevel(dmiServiceName, cmHandleIds, newDmiTrustLevel);
             }
         });
     }