| // Copyright (C) 2022 The Android Open Source Project |
| // |
| // 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 com.googlesource.gerrit.plugins.gitrepometrics; |
| |
| import static java.util.stream.Collectors.collectingAndThen; |
| import static java.util.stream.Collectors.toList; |
| |
| import com.codahale.metrics.MetricRegistry; |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.base.Supplier; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.Maps; |
| import com.google.common.flogger.FluentLogger; |
| import com.google.gerrit.extensions.registration.DynamicSet; |
| import com.google.gerrit.metrics.Description; |
| import com.google.gerrit.metrics.MetricMaker; |
| import com.google.inject.Inject; |
| import com.googlesource.gerrit.plugins.gitrepometrics.collectors.GitRepoMetric; |
| import com.googlesource.gerrit.plugins.gitrepometrics.collectors.MetricsCollector; |
| import java.time.Clock; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.Map; |
| |
| public class GitRepoMetricsCache { |
| private static final FluentLogger logger = FluentLogger.forEnclosingClass(); |
| private Map<String, Long> metrics; |
| private final MetricMaker metricMaker; |
| private final MetricRegistry metricRegistry; |
| private final List<String> projects; |
| private Map<String, Long> collectedAt; |
| private final long gracePeriodMs; |
| private ImmutableList<GitRepoMetric> metricsNames; |
| private DynamicSet<MetricsCollector> collectors; |
| |
| private final Clock clock; |
| |
| @VisibleForTesting |
| GitRepoMetricsCache( |
| DynamicSet<MetricsCollector> collectors, |
| MetricMaker metricMaker, |
| MetricRegistry metricRegistry, |
| GitRepoMetricsConfig config, |
| Clock clock) { |
| this.collectors = collectors; |
| this.metricMaker = metricMaker; |
| this.metricRegistry = metricRegistry; |
| |
| this.metricsNames = |
| collectors.stream() |
| .flatMap(c -> c.availableMetrics().stream()) |
| .collect(collectingAndThen(toList(), ImmutableList::copyOf)); |
| |
| this.projects = config.getRepositoryNames(); |
| this.metrics = Maps.newHashMap(); |
| this.collectedAt = Maps.newHashMap(); |
| this.clock = clock; |
| this.gracePeriodMs = config.getGracePeriodMs(); |
| } |
| |
| @Inject |
| GitRepoMetricsCache( |
| DynamicSet<MetricsCollector> collectors, |
| MetricMaker metricMaker, |
| MetricRegistry metricRegistry, |
| GitRepoMetricsConfig config) { |
| this(collectors, metricMaker, metricRegistry, config, Clock.systemDefaultZone()); |
| } |
| |
| public Map<String, Long> getMetrics() { |
| return metrics; |
| } |
| |
| public void setMetrics(Map<String, Long> metrics, String projectName) { |
| this.collectedAt.put(projectName, clock.millis()); |
| this.metrics = metrics; |
| } |
| |
| public List<GitRepoMetric> getMetricsNames() { |
| return metricsNames; |
| } |
| |
| public DynamicSet<MetricsCollector> getCollectors() { |
| return collectors; |
| } |
| |
| @VisibleForTesting |
| public Map<String, Long> getCollectedAt() { |
| return collectedAt; |
| } |
| |
| public void initCache() { |
| metricsNames.forEach( |
| gitRepoMetric -> { |
| projects.forEach( |
| projectName -> { |
| String name = |
| GitRepoMetricsCache.getMetricName(gitRepoMetric.getName(), projectName); |
| Supplier<Long> supplier = |
| new Supplier<Long>() { |
| public Long get() { |
| // TODO Blaah! Initializing all the values to zero!? Would be better |
| // registering |
| // dynamically the metrics |
| // TODO add grace period!! |
| return getMetrics().getOrDefault(name, 0L); |
| } |
| }; |
| |
| if (!metricRegistry |
| .getMetrics() |
| .containsKey( |
| GitRepoMetricsCache.getFullyQualifiedMetricName( |
| gitRepoMetric.getName(), projectName))) { |
| metricMaker.newCallbackMetric( |
| name, |
| Long.class, |
| new Description(gitRepoMetric.getDescription()) |
| .setRate() |
| .setUnit(gitRepoMetric.getUnit()), |
| supplier); |
| } |
| }); |
| }); |
| } |
| |
| public static String getMetricName(String metricName, String projectName) { |
| return String.format("%s_%s", metricName, projectName).toLowerCase(Locale.ROOT); |
| } |
| |
| @VisibleForTesting |
| static String getFullyQualifiedMetricName(String metricName, String projectName) { |
| return String.format( |
| "%s/%s/%s", "plugins", "git-repo-metrics", getMetricName(metricName, projectName)); |
| } |
| |
| public boolean shouldCollectStats(String projectName) { |
| long lastCollectionTime = collectedAt.getOrDefault(projectName, 0L); |
| long currentTimeMs = System.currentTimeMillis(); |
| boolean doCollectStats = lastCollectionTime + gracePeriodMs <= currentTimeMs; |
| if (!doCollectStats) { |
| logger.atFine().log( |
| "Skip stats collection for %s (grace period: %d, last collection time: %d, current time: %d", |
| projectName, gracePeriodMs, lastCollectionTime, currentTimeMs); |
| return false; |
| } |
| |
| return projects.stream().anyMatch(p -> p.equals(projectName)); |
| } |
| } |