1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package org.apache.omid.metrics;
19
20 public interface Counter extends Metric {
21
22 /**
23 * Increment the counter by one.
24 */
25 void inc();
26
27 /**
28 * Increment the counter by {@code n}.
29 *
30 * @param n the amount by which the counter will be increased
31 */
32 void inc(long n);
33
34 /**
35 * Decrement the counter by one.
36 */
37 void dec();
38
39 /**
40 * Decrement the counter by {@code n}.
41 *
42 * @param n the amount by which the counter will be decreased
43 */
44 void dec(long n);
45
46 }