From 633fde4378905bffb967b30857257427cced4228 Mon Sep 17 00:00:00 2001
From: Mayur Kale <mayurkale@google.com>
Date: Fri, 19 Oct 2018 10:05:26 -0700
Subject:  Plugs-in the DerivedLongGauge and DerivedDoubleGauge into the
 registry (#1505)

* Plugs-in the DerivedLongGauge into the registry

* Plugs-in the DerivedDoubleGauge into the registry
---
 .../implcore/metrics/MetricRegistryImpl.java       | 32 ++++++++++++++++++++++
 1 file changed, 32 insertions(+)

(limited to 'impl_core/src/main/java/io/opencensus/implcore/metrics')

diff --git a/impl_core/src/main/java/io/opencensus/implcore/metrics/MetricRegistryImpl.java b/impl_core/src/main/java/io/opencensus/implcore/metrics/MetricRegistryImpl.java
index c606d7e9..1a301ecf 100644
--- a/impl_core/src/main/java/io/opencensus/implcore/metrics/MetricRegistryImpl.java
+++ b/impl_core/src/main/java/io/opencensus/implcore/metrics/MetricRegistryImpl.java
@@ -20,6 +20,8 @@ import static com.google.common.base.Preconditions.checkNotNull;
 
 import io.opencensus.common.Clock;
 import io.opencensus.implcore.internal.Utils;
+import io.opencensus.metrics.DerivedDoubleGauge;
+import io.opencensus.metrics.DerivedLongGauge;
 import io.opencensus.metrics.DoubleGauge;
 import io.opencensus.metrics.LabelKey;
 import io.opencensus.metrics.LongGauge;
@@ -73,6 +75,36 @@ public final class MetricRegistryImpl extends MetricRegistry {
     return doubleGaugeMetric;
   }
 
+  @Override
+  public DerivedLongGauge addDerivedLongGauge(
+      String name, String description, String unit, List<LabelKey> labelKeys) {
+    Utils.checkListElementNotNull(
+        checkNotNull(labelKeys, "labelKeys"), "labelKey element should not be null.");
+    DerivedLongGaugeImpl derivedLongGauge =
+        new DerivedLongGaugeImpl(
+            checkNotNull(name, "name"),
+            checkNotNull(description, "description"),
+            checkNotNull(unit, "unit"),
+            Collections.unmodifiableList(new ArrayList<LabelKey>(labelKeys)));
+    registeredMeters.registerMeter(name, derivedLongGauge);
+    return derivedLongGauge;
+  }
+
+  @Override
+  public DerivedDoubleGauge addDerivedDoubleGauge(
+      String name, String description, String unit, List<LabelKey> labelKeys) {
+    Utils.checkListElementNotNull(
+        checkNotNull(labelKeys, "labelKeys"), "labelKey element should not be null.");
+    DerivedDoubleGaugeImpl derivedDoubleGauge =
+        new DerivedDoubleGaugeImpl(
+            checkNotNull(name, "name"),
+            checkNotNull(description, "description"),
+            checkNotNull(unit, "unit"),
+            Collections.unmodifiableList(new ArrayList<LabelKey>(labelKeys)));
+    registeredMeters.registerMeter(name, derivedDoubleGauge);
+    return derivedDoubleGauge;
+  }
+
   private static final class RegisteredMeters {
     private volatile Map<String, Meter> registeredMeters = Collections.emptyMap();
 
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