Github user pravsingh commented on a diff in the pull request:
https://github.com/apache/zookeeper/pull/582#discussion_r205902898
--- Diff: src/java/main/org/apache/zookeeper/metrics/Counter.java ---
@@ -0,0 +1,47 @@
+/**
+ * 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.zookeeper.metrics;
+
+/**
+ * A counter refers to a value which can only increase.
+ * Usually the value is reset when the process starts.
+ */
+public interface Counter {
+
+ /**
+ * Increment the value by one.
+ */
+ public default void inc() {
--- End diff --
public keyword is not needed in interfaces. All of them are public by
default
---
