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dcb189943b
This is one of a series of CLs adding a new metric type, EventMetric, which is used for tracking numerical distributions. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=132103552
56 lines
2.2 KiB
Java
56 lines
2.2 KiB
Java
// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.monitoring.metrics;
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import static com.google.common.base.Preconditions.checkArgument;
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import com.google.common.collect.ImmutableList;
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/** Static helper methods for the Metrics library. */
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final class MetricsUtils {
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private static final Double NEGATIVE_ZERO = -0.0;
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private static final String LABEL_SIZE_ERROR =
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"The count of labelValues must be equal to the underlying Metric's count of labels.";
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private MetricsUtils() {}
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/**
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* Check that the given {@code labelValues} match in count with the count of {@link
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* LabelDescriptor} instances on the given {@code metric}
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*
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* @throws IllegalArgumentException if there is a count mismatch.
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*/
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static void checkLabelValuesLength(Metric<?> metric, String[] labelValues) {
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checkArgument(labelValues.length == metric.getMetricSchema().labels().size(), LABEL_SIZE_ERROR);
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}
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/**
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* Check that the given {@code labelValues} match in count with the count of {@link
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* LabelDescriptor} instances on the given {@code metric}
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*
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* @throws IllegalArgumentException if there is a count mismatch.
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*/
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static void checkLabelValuesLength(Metric<?> metric, ImmutableList<String> labelValues) {
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checkArgument(labelValues.size() == metric.getMetricSchema().labels().size(), LABEL_SIZE_ERROR);
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}
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/** Check that the given double is not infinite, {@code NaN}, or {@code -0.0}. */
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static void checkDouble(double value) {
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checkArgument(
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!Double.isInfinite(value) && !Double.isNaN(value) && !NEGATIVE_ZERO.equals(value),
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"value must be finite, not NaN, and not -0.0");
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}
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}
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