1 files changed, 36 insertions, 0 deletions
diff --git a/security-utils/src/main/java/com/yahoo/security/tls/TlsMetrics.java b/security-utils/src/main/java/com/yahoo/security/tls/TlsMetrics.java
new file mode 100644
index 00000000000..1e9561a5b82
--- /dev/null
+++ b/security-utils/src/main/java/com/yahoo/security/tls/TlsMetrics.java
@@ -0,0 +1,36 @@
+// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+package com.yahoo.security.tls;
+
+import java.util.concurrent.atomic.AtomicLong;
+
+/**
+ * @author bjorncs
+ */
+public class TlsMetrics {
+    private static final TlsMetrics instance = new TlsMetrics();
+
+    private final AtomicLong capabilitiesSucceeded = new AtomicLong(0);
+    private final AtomicLong capabilitiesFailed = new AtomicLong(0);
+
+    private TlsMetrics() {}
+
+    public static TlsMetrics instance() { return instance; }
+
+    void incrementCapabilitiesSucceeded() { capabilitiesSucceeded.incrementAndGet(); }
+    void incrementCapabilitiesFailed() { capabilitiesFailed.incrementAndGet(); }
+    public Snapshot snapshot() { return new Snapshot(this); }
+
+    public record Snapshot(long capabilitiesSucceeded, long capabilitiesFailed) {
+        public static final Snapshot EMPTY = new Snapshot(0, 0);
+        private Snapshot(TlsMetrics m) { this(m.capabilitiesSucceeded.get(), m.capabilitiesFailed.get()); }
+        public Diff changesSince(Snapshot previous) { return new Diff(this, previous); }
+    }
+
+    public record Diff(long capabilitiesSucceeded, long capabilitiesFailed) {
+        private Diff(Snapshot current, Snapshot previous) {
+            this(current.capabilitiesSucceeded - previous.capabilitiesSucceeded,
+                 current.capabilitiesFailed - previous.capabilitiesFailed);
+        }
+    }
+}