From b3c93e987d7985662bbda660974a3ed5077865cc Mon Sep 17 00:00:00 2001
From: Nikita Sapozhnikov <nikita.sapozhnikov@teamaol.com>
Date: Fri, 14 Jul 2017 14:43:12 +0100
Subject: [PATCH] InstantGauge to use with datadog

---
 .../server/spring/metrics/InstantGauge.java   | 24 +++++++++++++++++++
 .../spring/metrics/InstantGaugeTest.java      | 19 +++++++++++++++
 2 files changed, 43 insertions(+)
 create mode 100644 micro-metrics/src/main/java/com/aol/micro/server/spring/metrics/InstantGauge.java
 create mode 100644 micro-metrics/src/test/java/com/aol/micro/server/spring/metrics/InstantGaugeTest.java

diff --git a/micro-metrics/src/main/java/com/aol/micro/server/spring/metrics/InstantGauge.java b/micro-metrics/src/main/java/com/aol/micro/server/spring/metrics/InstantGauge.java
new file mode 100644
index 000000000..94f2f0192
--- /dev/null
+++ b/micro-metrics/src/main/java/com/aol/micro/server/spring/metrics/InstantGauge.java
@@ -0,0 +1,24 @@
+package com.aol.micro.server.spring.metrics;
+
+import java.util.concurrent.atomic.AtomicLong;
+
+import com.codahale.metrics.Gauge;
+
+
+public class InstantGauge implements Gauge<Long> {
+
+	private final AtomicLong counter = new AtomicLong(0l);
+
+	@Override
+	public Long getValue() {
+		return counter.getAndSet(0l);
+		}
+
+	public void increment() {
+		counter.incrementAndGet();
+	}
+
+	public void increase(long value) {
+		counter.addAndGet(value);
+	}
+}
diff --git a/micro-metrics/src/test/java/com/aol/micro/server/spring/metrics/InstantGaugeTest.java b/micro-metrics/src/test/java/com/aol/micro/server/spring/metrics/InstantGaugeTest.java
new file mode 100644
index 000000000..32be828d0
--- /dev/null
+++ b/micro-metrics/src/test/java/com/aol/micro/server/spring/metrics/InstantGaugeTest.java
@@ -0,0 +1,19 @@
+package com.aol.micro.server.spring.metrics;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class InstantGaugeTest {
+
+	@Test
+	public void instantGauge() {
+		InstantGauge gauge = new InstantGauge();
+		gauge.increment();
+		gauge.increase(3);
+
+		assertEquals(4l ,gauge.getValue().longValue());
+		assertEquals(0l ,gauge.getValue().longValue());
+
+	}
+
+}