From aaa782adee69ec9c24b7519b351ad276e865ec9d Mon Sep 17 00:00:00 2001
From: Alfredo Gutierrez <alfredo@swirldslabs.com>
Date: Tue, 27 Aug 2024 13:26:34 -0600
Subject: [PATCH] annotate interface methods with non null

Signed-off-by: Alfredo Gutierrez <alfredo@swirldslabs.com>
---
 .../java/com/hedera/block/server/metrics/MetricsService.java | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/server/src/main/java/com/hedera/block/server/metrics/MetricsService.java b/server/src/main/java/com/hedera/block/server/metrics/MetricsService.java
index c152a3dd8..6269a74ea 100644
--- a/server/src/main/java/com/hedera/block/server/metrics/MetricsService.java
+++ b/server/src/main/java/com/hedera/block/server/metrics/MetricsService.java
@@ -18,6 +18,7 @@
 
 import com.swirlds.metrics.api.Counter;
 import com.swirlds.metrics.api.LongGauge;
+import edu.umd.cs.findbugs.annotations.NonNull;
 
 /** Use member variables of this class to update metric data for the Hedera Block Node. */
 public interface MetricsService {
@@ -26,6 +27,7 @@ public interface MetricsService {
      *
      * @return use this metric to increase the counter of block items received
      */
+    @NonNull
     Counter liveBlockItems();
 
     /**
@@ -33,6 +35,7 @@ public interface MetricsService {
      *
      * @return use this counter to increase the amount of blocks persisted to disk
      */
+    @NonNull
     Counter blocksPersisted();
 
     /**
@@ -40,6 +43,7 @@ public interface MetricsService {
      *
      * @return use this metric to increase the counter of single blocks retrieved
      */
+    @NonNull
     Counter singleBlocksRetrieved();
 
     /**
@@ -47,5 +51,6 @@ public interface MetricsService {
      *
      * @return Use this to increase or decrease the amount of current subscribers to the live stream
      */
+    @NonNull
     LongGauge subscribers();
 }