| /* |
| * Copyright 2018, OpenCensus Authors |
| * |
| * 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 io.opencensus.implcore.metrics; |
| |
| import io.opencensus.common.Clock; |
| import io.opencensus.metrics.export.Metric; |
| import javax.annotation.Nullable; |
| |
| interface Meter { |
| /** |
| * Provides a {@link io.opencensus.metrics.export.Metric} with one or more {@link |
| * io.opencensus.metrics.export.TimeSeries}. |
| * |
| * @param clock the clock used to get the time. |
| * @throws NullPointerException if {@code TimeSeries} is not present in {@code Metric}. |
| * @return a {@code Metric}. |
| */ |
| @Nullable |
| Metric getMetric(Clock clock); |
| } |