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/*
* 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);
}
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