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Counter.java
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Counter.java
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/*
* 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.metrics;
import org.apache.flink.annotation.PublicEvolving;
/**
* A Counter is a {@link org.apache.flink.metrics.Metric} that measures a count.
*/
@PublicEvolving
public final class Counter implements Metric {
private long count = 0;
/**
* Increment the current count by 1.
*/
public void inc() {
count++;
}
/**
* Increment the current count by the given value.
*
* @param n value to increment the current count by
*/
public void inc(long n) {
count += n;
}
/**
* Decrement the current count by 1.
*/
public void dec() {
count--;
}
/**
* Decrement the current count by the given value.
*
* @param n value to decrement the current count by
*/
public void dec(long n) {
count -= n;
}
/**
* Returns the current count.
*
* @return current count
*/
public long getCount() {
return count;
}
}