com.google.gerrit.metrics.Counter1 Maven / Gradle / Ivy
// 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.
*
* 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.
*
*
For an instantaneous read of a value that can change over time (e.g. "memory in use") use a
* {@link CallbackMetric}.
*
* @param type of the field.
*/
public abstract class Counter1 implements RegistrationHandle {
/**
* Increment the counter by one event.
*
* @param field1 bucket to increment.
*/
public void increment(F1 field1) {
incrementBy(field1, 1);
}
/**
* Increment the counter by a specified amount.
*
* @param field1 bucket to increment.
* @param value value to increment by, must be >= 0.
*/
public abstract void incrementBy(F1 field1, long value);
}