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// Copyright (C) 2012 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.google.gerrit.server.project;
import static com.google.common.collect.ImmutableList.toImmutableList;
import com.google.common.collect.Streams;
import com.google.common.flogger.FluentLogger;
import com.google.gerrit.entities.Project;
import com.google.gerrit.entities.SubmitRecord;
import com.google.gerrit.entities.SubmitTypeRecord;
import com.google.gerrit.exceptions.StorageException;
import com.google.gerrit.extensions.api.changes.ChangeApi;
import com.google.gerrit.metrics.Description;
import com.google.gerrit.metrics.Description.Units;
import com.google.gerrit.metrics.MetricMaker;
import com.google.gerrit.metrics.Timer0;
import com.google.gerrit.server.change.ChangeJson;
import com.google.gerrit.server.index.OnlineReindexMode;
import com.google.gerrit.server.logging.CallerFinder;
import com.google.gerrit.server.plugincontext.PluginSetContext;
import com.google.gerrit.server.query.change.ChangeData;
import com.google.gerrit.server.rules.DefaultSubmitRule;
import com.google.gerrit.server.rules.PrologSubmitRuleUtil;
import com.google.gerrit.server.rules.SubmitRule;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import com.google.inject.assistedinject.Assisted;
import java.util.List;
import java.util.Optional;
/**
* Evaluates a submit-like Prolog rule found in the rules.pl file of the current project and filters
* the results through rules found in the parent projects, all the way up to All-Projects.
*/
public class SubmitRuleEvaluator {
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
public interface Factory {
/** Returns a new {@link SubmitRuleEvaluator} with the specified options */
SubmitRuleEvaluator create(SubmitRuleOptions options);
}
@Singleton
private static class Metrics {
final Timer0 submitRuleEvaluationLatency;
final Timer0 submitTypeEvaluationLatency;
@Inject
Metrics(MetricMaker metricMaker) {
submitRuleEvaluationLatency =
metricMaker.newTimer(
"change/submit_rule_evaluation",
new Description("Latency for evaluating submit rules on a change.")
.setCumulative()
.setUnit(Units.MILLISECONDS));
submitTypeEvaluationLatency =
metricMaker.newTimer(
"change/submit_type_evaluation",
new Description("Latency for evaluating the submit type on a change.")
.setCumulative()
.setUnit(Units.MILLISECONDS));
}
}
private final ProjectCache projectCache;
private final PrologSubmitRuleUtil prologSubmitRuleUtil;
private final PluginSetContext<SubmitRule> submitRules;
private final Metrics metrics;
private final SubmitRuleOptions opts;
private final CallerFinder callerFinder;
@Inject
private SubmitRuleEvaluator(
ProjectCache projectCache,
PrologSubmitRuleUtil prologSubmitRuleUtil,
PluginSetContext<SubmitRule> submitRules,
Metrics metrics,
@Assisted SubmitRuleOptions options) {
this.projectCache = projectCache;
this.prologSubmitRuleUtil = prologSubmitRuleUtil;
this.submitRules = submitRules;
this.metrics = metrics;
this.opts = options;
this.callerFinder =
CallerFinder.builder()
.addTarget(ChangeApi.class)
.addTarget(ChangeJson.class)
.addTarget(ChangeData.class)
.addTarget(SubmitRequirementsEvaluatorImpl.class)
.build();
}
/**
* Evaluate the submit rules.
*
* @return List of {@link SubmitRecord} objects returned from the evaluated rules, including any
* errors.
* @param cd ChangeData to evaluate
*/
public List<SubmitRecord> evaluate(ChangeData cd) {
logger.atFine().log(
"Evaluate submit rules for change %d (caller: %s)",
cd.change().getId().get(), callerFinder.findCallerLazy());
try (Timer0.Context ignored = metrics.submitRuleEvaluationLatency.start()) {
if (cd.change() == null) {
throw new StorageException("Change not found");
}
ProjectState projectState =
projectCache
.get(cd.project())
.orElseThrow(
() ->
new IllegalStateException(
"Unable to find project while evaluating submit rule",
new NoSuchProjectException(cd.project())));
if (cd.change().isClosed()
&& (!opts.recomputeOnClosedChanges() || OnlineReindexMode.isActive())) {
return cd.notes().getSubmitRecords().stream()
.map(
r -> {
SubmitRecord record = r.deepCopy();
if (record.status == SubmitRecord.Status.OK) {
// Submit records that were OK when they got merged are CLOSED now.
record.status = SubmitRecord.Status.CLOSED;
}
return record;
})
.collect(toImmutableList());
}
// We evaluate all the plugin-defined evaluators,
// and then we collect the results in one list.
return Streams.stream(submitRules)
// Skip evaluating the default submit rule if the project has prolog rules.
// Note that in this case, the prolog submit rule will handle labels for us
.filter(
projectState.hasPrologRules()
? rule -> !(rule.get() instanceof DefaultSubmitRule)
: rule -> true)
.map(
c ->
c.call(
s -> {
Optional<SubmitRecord> record = s.evaluate(cd);
if (record.isPresent() && record.get().ruleName == null) {
// Only back-fill the ruleName if it was not populated by the "submit
// rule".
record.get().ruleName =
c.getPluginName() + "~" + s.getClass().getSimpleName();
}
return record;
}))
.filter(Optional::isPresent)
.map(Optional::get)
.collect(toImmutableList());
}
}
/**
* Evaluate the submit type rules to get the submit type.
*
* @return record from the evaluated rules.
*/
public SubmitTypeRecord getSubmitType(ChangeData cd) {
try (Timer0.Context ignored = metrics.submitTypeEvaluationLatency.start()) {
try {
Project.NameKey name = cd.project();
Optional<ProjectState> project = projectCache.get(name);
if (!project.isPresent()) {
throw new NoSuchProjectException(name);
}
} catch (NoSuchProjectException e) {
throw new IllegalStateException("Unable to find project while evaluating submit rule", e);
}
return prologSubmitRuleUtil.getSubmitType(cd);
}
}
}
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