Add java source from simplemetrics.

1 files changed, 24 insertions, 0 deletions

diff --git a/container-core/src/main/java/com/yahoo/metrics/simple/MetricUpdater.java b/container-core/src/main/java/com/yahoo/metrics/simple/MetricUpdater.java
new file mode 100644
index 00000000000..848132c9bea
--- /dev/null
+++ b/container-core/src/main/java/com/yahoo/metrics/simple/MetricUpdater.java
@@ -0,0 +1,24 @@
+// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.metrics.simple;
+
+import com.yahoo.concurrent.ThreadLocalDirectory.Updater;
+
+/**
+ * The link between each single thread and the central data store.
+ *
+ * @author Steinar Knutsen
+ */
+class MetricUpdater implements Updater<Bucket, Sample> {
+
+    @Override
+    public Bucket createGenerationInstance(Bucket previous) {
+        return new Bucket();
+    }
+
+    @Override
+    public Bucket update(Bucket current, Sample x) {
+        current.put(x);
+        return current;
+    }
+
+}