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https://issues.apache.org/jira/browse/FLINK-4920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15817877#comment-15817877
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ASF GitHub Bot commented on FLINK-4920:
---------------------------------------
Github user KurtYoung commented on a diff in the pull request:
https://github.com/apache/flink/pull/3080#discussion_r95547616
--- Diff:
flink-scala/src/main/scala/org/apache/flink/api/scala/metrics/ScalaGauge.scala
---
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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.apache.flink.api.scala.metrics
+
+import org.apache.flink.metrics.Gauge
+
+class ScalaGauge[T]( func: () => T ) extends Gauge[T] {
--- End diff --
i think we can skip the spaces around the parenthesis to make it more
consistent with current Scala code style.
> Add a Scala Function Gauge
> --------------------------
>
> Key: FLINK-4920
> URL: https://issues.apache.org/jira/browse/FLINK-4920
> Project: Flink
> Issue Type: Improvement
> Components: Metrics, Scala API
> Reporter: Stephan Ewen
> Assignee: Pattarawat Chormai
> Labels: easyfix, starter
>
> A useful metrics utility for the Scala API would be to add a Gauge that
> obtains its value by calling a Scala Function0.
> That way, one can add Gauges in Scala programs using Scala lambda notation or
> function references.
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