Fix statsCounterService in EdgeGrpcSession after merge

application/src/main/java/org/thingsboard/server/service/edge/rpc/session/EdgeGrpcSession.java

@@ -401,7 +401,8 @@ public class EdgeGrpcSession implements EdgeSession {
             if (state.isConnected() && !pageData.getData().isEmpty()) {
                 if (fetcher instanceof GeneralEdgeEventFetcher) {
                     long queueSize = pageData.getTotalElements() - ((long) pageLink.getPageSize() * pageLink.getPage());
-                    ctx.getStatsCounterService().ifPresent(statsCounterService -> statsCounterService.setDownlinkMsgsLag(edge.getTenantId(), edge.getId(), queueSize));
+                    ctx.getStatsCounterService().ifPresent(statsCounterService ->
+                            statsCounterService.recordEvent(EdgeStatsKey.DOWNLINK_MSGS_LAG, tenantId, edge.getId(), queueSize));
                 }
                 log.trace("[{}][{}][{}] event(s) are going to be processed.", tenantId, edge.getId(), pageData.getData().size());
                 List<DownlinkMsg> downlinkMsgsPack = downlinkMessageMapper.convertToDownlinkMsgsPack(state, pageData.getData());
@@ -496,7 +497,8 @@ public class EdgeGrpcSession implements EdgeSession {
                         ctx.getRuleProcessor().process(EdgeCommunicationFailureTrigger.builder().tenantId(getTenantId()).edgeId(getEdgeId())
                                 .customerId(edge.getCustomerId()).edgeName(edge.getName()).failureMsg(failureMsg)
                                 .error("Failed to deliver messages after " + MAX_DOWNLINK_ATTEMPTS + " attempts").build());
-                        ctx.getStatsCounterService().ifPresent(statsCounterService -> statsCounterService.recordEvent(EdgeStatsKey.DOWNLINK_MSGS_PERMANENTLY_FAILED, edge.getTenantId(), getEdgeId(), copy.size()));
+                        ctx.getStatsCounterService().ifPresent(statsCounterService ->
+                                statsCounterService.recordEvent(EdgeStatsKey.DOWNLINK_MSGS_PERMANENTLY_FAILED, edge.getTenantId(), getEdgeId(), copy.size()));
                         stopCurrentSendDownlinkMsgsTask(false);
                     }
                 } else {