Slice out MetricsHelper/Util
Change-Id: Ic6848f47d38550b78ebd6cdcf414305e54408882
diff --git a/utils/misc/src/main/java/org/onlab/metrics/MetricsUtil.java b/utils/misc/src/main/java/org/onlab/metrics/MetricsUtil.java
new file mode 100644
index 0000000..e837c66
--- /dev/null
+++ b/utils/misc/src/main/java/org/onlab/metrics/MetricsUtil.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onlab.metrics;
+
+import com.codahale.metrics.Timer;
+import com.codahale.metrics.Timer.Context;
+
+public final class MetricsUtil {
+
+ /**
+ * Starts the Metric Timer.
+ * <p>
+ * If the given timer was null, it will silently return null.
+ * </p>
+ *
+ * @param timer timer to start
+ * @return timing context, if timer was not null
+ */
+ public static final Context startTimer(Timer timer) {
+ if (timer != null) {
+ return timer.time();
+ }
+ return null;
+ }
+
+ /**
+ * Stops the Metric Timer context.
+ * <p>
+ * If the given context was null, it will silently be ignored.
+ * </p>
+ *
+ * @param context timing context to stop, if not null.
+ */
+ public static final void stopTimer(Context context) {
+ if (context != null) {
+ context.stop();
+ }
+ }
+
+ // avoid instantiation
+ private MetricsUtil() {}
+}