Bowen Li created FLINK-6053: ------------------------------- Summary: Gauge<T> should only take subclasses of Number, rather than everything Key: FLINK-6053 URL: https://issues.apache.org/jira/browse/FLINK-6053 Project: Flink Issue Type: Improvement Components: Metrics Affects Versions: 1.2.0 Reporter: Bowen Li Fix For: 1.3.0
Currently, Flink's Gauge is defined as ``` /** * A Gauge is a {@link Metric} that calculates a specific value at a point in time. */ public interface Gauge<T> extends Metric { T getValue(); } ``` But it doesn't make sense to have Gauge take generic types other than Number. So the class should be like ``` /** * A Gauge is a {@link Metric} that calculates a specific value at a point in time. */ public interface Gauge<T extends Number> extends Metric { T getValue(); } ``` -- This message was sent by Atlassian JIRA (v6.3.15#6346)