1 /* 2 * Copyright 2018, OpenCensus Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package io.opencensus.metrics.export; 18 19 import io.opencensus.common.ExperimentalApi; 20 import java.util.Collection; 21 22 /** 23 * A {@link Metric} producer that can be registered for exporting using {@link 24 * MetricProducerManager}. 25 * 26 * <p>All implementation MUST be thread-safe. 27 * 28 * @since 0.17 29 */ 30 @ExperimentalApi 31 public abstract class MetricProducer { 32 33 /** 34 * Returns a collection of produced {@link Metric}s to be exported. 35 * 36 * @return a collection of produced {@link Metric}s to be exported. 37 * @since 0.17 38 */ 39 public abstract Collection<Metric> getMetrics(); 40 } 41
