Emit QoS metric for all maintainers

1 files changed, 41 insertions, 0 deletions

diff --git a/vespajlib/src/main/java/com/yahoo/concurrent/maintenance/JobMetrics.java b/vespajlib/src/main/java/com/yahoo/concurrent/maintenance/JobMetrics.java
new file mode 100644
index 00000000000..4c05d46d782
--- /dev/null
+++ b/vespajlib/src/main/java/com/yahoo/concurrent/maintenance/JobMetrics.java
@@ -0,0 +1,41 @@
+// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.concurrent.maintenance;
+
+import java.time.Clock;
+import java.time.Instant;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.BiConsumer;
+
+/**
+ * Tracks and forwards maintenance job metrics.
+ *
+ * @author mpolden
+ */
+public class JobMetrics {
+
+    private final Clock clock;
+    private final BiConsumer<String, Instant> metricConsumer;
+
+    private final Map<String, Instant> successfulRuns = new ConcurrentHashMap<>();
+
+    public JobMetrics(Clock clock, BiConsumer<String, Instant> metricConsumer) {
+        this.clock = Objects.requireNonNull(clock);
+        this.metricConsumer = metricConsumer;
+    }
+
+    /** Record successful run of given job */
+    public void recordSuccessOf(String job) {
+        successfulRuns.put(job, clock.instant());
+    }
+
+    /** Forward metrics for given job to metric consumer */
+    public void forward(String job) {
+        Instant lastSuccess = successfulRuns.get(job);
+        if (lastSuccess != null) {
+            metricConsumer.accept(job, lastSuccess);
+        }
+    }
+
+}