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72 lines
2.9 KiB
Java
72 lines
2.9 KiB
Java
// Copyright 2017 The Nomulus 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.model.server;
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import com.google.common.collect.ImmutableSet;
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import com.google.monitoring.metrics.DistributionFitter;
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import com.google.monitoring.metrics.EventMetric;
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import com.google.monitoring.metrics.ExponentialFitter;
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import com.google.monitoring.metrics.IncrementableMetric;
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import com.google.monitoring.metrics.LabelDescriptor;
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import com.google.monitoring.metrics.MetricRegistryImpl;
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import google.registry.model.server.Lock.LockState;
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import javax.annotation.Nullable;
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import org.joda.time.Duration;
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/** Metrics for lock contention. */
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class LockMetrics {
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private static final ImmutableSet<LabelDescriptor> REQUEST_LABEL_DESCRIPTORS =
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ImmutableSet.of(
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LabelDescriptor.create("tld", "TLD"),
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LabelDescriptor.create("resource", "resource name"),
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LabelDescriptor.create(
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"state", "The existing lock state (before attempting to acquire)."));
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private static final ImmutableSet<LabelDescriptor> RELEASE_LABEL_DESCRIPTORS =
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ImmutableSet.of(
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LabelDescriptor.create("tld", "TLD"),
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LabelDescriptor.create("resource", "resource name"));
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// Finer-grained fitter than the DEFAULT_FITTER, allows values between 10 and 10*2^20, which
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// gives almost 3 hours.
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private static final DistributionFitter EXPONENTIAL_FITTER =
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ExponentialFitter.create(20, 2.0, 10.0);
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private static final IncrementableMetric lockRequestsMetric =
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MetricRegistryImpl.getDefault()
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.newIncrementableMetric(
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"/lock/acquire_lock_requests",
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"Count of lock acquisition attempts",
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"count",
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REQUEST_LABEL_DESCRIPTORS);
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private static final EventMetric lockLifetimeMetric =
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MetricRegistryImpl.getDefault()
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.newEventMetric(
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"/lock/lock_duration",
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"Lock lifetime",
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"milliseconds",
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RELEASE_LABEL_DESCRIPTORS,
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EXPONENTIAL_FITTER);
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void recordAcquire(String resourceName, @Nullable String tld, LockState state) {
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lockRequestsMetric.increment(String.valueOf(tld), resourceName, state.name());
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}
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void recordRelease(String resourceName, @Nullable String tld, Duration duration) {
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lockLifetimeMetric.record(duration.getMillis(), String.valueOf(tld), resourceName);
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}
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}
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