Code review minor misc fixes

application/src/main/java/org/thingsboard/server/service/ttl/EdgeEventsCleanUpService.java

@@ -28,6 +28,9 @@ import org.thingsboard.server.queue.util.TbCoreComponent;
 @Service
 public class EdgeEventsCleanUpService extends AbstractCleanUpService {
 
+    public static final String RANDOM_DELAY_INTERVAL_MS_EXPRESSION =
+            "#{T(org.apache.commons.lang3.RandomUtils).nextLong(0, ${sql.ttl.edge_events.execution_interval_ms})}";
+
     @Value("${sql.ttl.edge_events.edge_events_ttl}")
     private long ttl;
 
@@ -41,7 +44,7 @@ public class EdgeEventsCleanUpService extends AbstractCleanUpService {
         this.edgeEventService = edgeEventService;
     }
 
-    @Scheduled(initialDelayString = "${sql.ttl.edge_events.execution_interval_ms}", fixedDelayString = "${sql.ttl.edge_events.execution_interval_ms}")
+    @Scheduled(initialDelayString = RANDOM_DELAY_INTERVAL_MS_EXPRESSION, fixedDelayString = "${sql.ttl.edge_events.execution_interval_ms}")
     public void cleanUp() {
         if (ttlTaskExecutionEnabled && isSystemTenantPartitionMine()) {
             edgeEventService.cleanupEvents(ttl);

common/data/src/main/java/org/thingsboard/server/common/data/id/EdgeId.java

@@ -32,8 +32,8 @@ public class EdgeId extends UUIDBased implements EntityId {
         super(id);
     }
 
-    public static EdgeId fromString(String integrationId) {
-        return new EdgeId(UUID.fromString(integrationId));
+    public static EdgeId fromString(String edgeId) {
+        return new EdgeId(UUID.fromString(edgeId));
     }
 
     @ApiModelProperty(position = 2, required = true, value = "string", example = "EDGE", allowableValues = "EDGE")