mirror of
https://github.com/google/nomulus.git
synced 2025-05-01 12:37:52 +02:00
71 lines
2.9 KiB
Java
71 lines
2.9 KiB
Java
// Copyright 2017 The Nomulus Authors. All Rights Reserved.
|
|
//
|
|
// 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 google.registry.monitoring.metrics;
|
|
|
|
import static com.google.common.base.Preconditions.checkArgument;
|
|
|
|
import com.google.common.collect.ImmutableList;
|
|
import java.util.concurrent.ConcurrentHashMap;
|
|
|
|
/** Static helper methods for the Metrics library. */
|
|
final class MetricsUtils {
|
|
|
|
private static final Double NEGATIVE_ZERO = -0.0;
|
|
private static final String LABEL_SIZE_ERROR =
|
|
"The count of labelValues must be equal to the underlying Metric's count of labels.";
|
|
|
|
/**
|
|
* The below constants replicate the default initial capacity, load factor, and concurrency level
|
|
* for {@link ConcurrentHashMap} as of Java SE 7. They are recorded here so that a {@link
|
|
* com.google.common.util.concurrent.Striped} object can be constructed with a concurrency level
|
|
* matching the default concurrency level of a {@link ConcurrentHashMap}.
|
|
*/
|
|
private static final int HASHMAP_INITIAL_CAPACITY = 16;
|
|
private static final float HASHMAP_LOAD_FACTOR = 0.75f;
|
|
static final int DEFAULT_CONCURRENCY_LEVEL = 16;
|
|
|
|
private MetricsUtils() {}
|
|
|
|
/**
|
|
* Check that the given {@code labelValues} match in count with the count of {@link
|
|
* LabelDescriptor} instances on the given {@code metric}
|
|
*
|
|
* @throws IllegalArgumentException if there is a count mismatch.
|
|
*/
|
|
static void checkLabelValuesLength(Metric<?> metric, String[] labelValues) {
|
|
checkArgument(labelValues.length == metric.getMetricSchema().labels().size(), LABEL_SIZE_ERROR);
|
|
}
|
|
|
|
/**
|
|
* Check that the given {@code labelValues} match in count with the count of {@link
|
|
* LabelDescriptor} instances on the given {@code metric}
|
|
*
|
|
* @throws IllegalArgumentException if there is a count mismatch.
|
|
*/
|
|
static void checkLabelValuesLength(Metric<?> metric, ImmutableList<String> labelValues) {
|
|
checkArgument(labelValues.size() == metric.getMetricSchema().labels().size(), LABEL_SIZE_ERROR);
|
|
}
|
|
|
|
/** Check that the given double is not infinite, {@code NaN}, or {@code -0.0}. */
|
|
static void checkDouble(double value) {
|
|
checkArgument(
|
|
!Double.isInfinite(value) && !Double.isNaN(value) && !NEGATIVE_ZERO.equals(value),
|
|
"value must be finite, not NaN, and not -0.0");
|
|
}
|
|
|
|
static <K, V> ConcurrentHashMap<K, V> newConcurrentHashMap(int concurrencyLevel) {
|
|
return new ConcurrentHashMap<>(HASHMAP_INITIAL_CAPACITY, HASHMAP_LOAD_FACTOR, concurrencyLevel);
|
|
}
|
|
}
|