// 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;
/**
* Metric whose value is supplied when the trigger is invoked.
*
* <pre>
* CallbackMetric0<Long> hits = metricMaker.newCallbackMetric("hits", ...);
* CallbackMetric0<Long> total = metricMaker.newCallbackMetric("total", ...);
* metricMaker.newTrigger(hits, total, new Runnable() {
* public void run() {
* hits.set(1);
* total.set(5);
* }
* });
* </pre>
*
* @param <V> type of the metric value, typically Integer or Long.
*/
public abstract class CallbackMetric0<V> implements CallbackMetric<V> {
/**
* Supply the current value of the metric.
*
* @param value current value.
*/
public abstract void set(V value);
@Override
public void prune() {}
}