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// Copyright (C) 2015 The Android Open Source Project
//
// Licensed 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 com.google.gerrit.metrics;
import com.google.gerrit.extensions.registration.RegistrationHandle;
/**
* Metric whose value increments during the life of the process.
*
* <p>Suitable uses are "total requests handled", "bytes sent", etc. Use {@link
* Description#setRate()} to suggest the monitoring system should also track the rate of increments
* if this is of interest.
*
* <p>For an instantaneous read of a value that can change over time (e.g. "memory in use") use a
* {@link CallbackMetric}.
*/
public abstract class Counter0 implements RegistrationHandle {
/** Increment the counter by one event. */
public void increment() {
incrementBy(1);
}
/**
* Increment the counter by a specified amount.
*
* @param value value to increment by, must be &gt;= 0.
*/
public abstract void incrementBy(long value);
}