| /* |
| * 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.samza.metrics; |
| |
| /** |
| * A MetricsVisitor can be used to process each metric in a {@link org.apache.samza.metrics.ReadableMetricsRegistry}, |
| * encapsulating the logic of what to be done with each metric in the counter and gauge methods. This makes it easy |
| * to quickly process all of the metrics in a registry. |
| */ |
| public abstract class MetricsVisitor { |
| public abstract void counter(Counter counter); |
| |
| public abstract <T> void gauge(Gauge<T> gauge); |
| |
| public abstract void timer(Timer timer); |
| |
| |
| public void visit(Metric metric) { |
| if (metric instanceof Counter) { |
| counter((Counter) metric); |
| } else if (metric instanceof Gauge<?>) { |
| gauge((Gauge<?>) metric); |
| } else if (metric instanceof Timer) { |
| timer((Timer) metric); |
| } |
| } |
| } |