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// Copyright (C) 2021 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.acceptance;
import com.google.gerrit.common.UsedAt;
import com.google.gerrit.metrics.Counter0;
import com.google.gerrit.metrics.Description;
import com.google.gerrit.metrics.DisabledMetricMaker;
import com.google.gerrit.metrics.Field;
import com.google.gerrit.metrics.Timer1;
import com.google.inject.Singleton;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.TimeUnit;
import org.apache.commons.lang3.mutable.MutableLong;
/**
* {@link com.google.gerrit.metrics.MetricMaker} to be bound in tests.
*
* <p>Records how often {@link Counter0} and {@link Timer1} metrics are invoked. Metrics for other
* types are not recorded.
*
* <p>Allows test to check how much a {@link Counter0} and {@link Timer1} metric is increased by an
* operation.
*
* <p>Example:
*
* <pre>
* public class MyTest extends AbstractDaemonTest {
* {@literal @}Inject private TestMetricMaker testMetricMaker;
*
* ...
*
* {@literal @}Test
* public void testFoo() throws Exception {
* testMetricMaker.reset();
* doSomething();
* assertThat(testMetricMaker.getCount("foo/bar_count")).isEqualsTo(1);
* }
* }
* </pre>
*/
@Singleton
public class TestMetricMaker extends DisabledMetricMaker {
private final ConcurrentHashMap<String, MutableLong> counts = new ConcurrentHashMap<>();
private final ConcurrentHashMap<String, MutableLong> timers = new ConcurrentHashMap<>();
public long getCount(String counter0Name) {
return getCounterValue(counter0Name).longValue();
}
public long getTimer(String timerName) {
return getTimerValue(timerName).longValue();
}
public void reset() {
counts.clear();
timers.clear();
}
private MutableLong getCounterValue(String counter0Name) {
return counts.computeIfAbsent(counter0Name, name -> new MutableLong(0));
}
private MutableLong getTimerValue(String timerName) {
return counts.computeIfAbsent(timerName, name -> new MutableLong(0));
}
@Override
public Counter0 newCounter(String name, Description desc) {
return new Counter0() {
@Override
public void incrementBy(long value) {
getCounterValue(name).add(value);
}
@Override
public void remove() {}
};
}
@Override
@UsedAt(UsedAt.Project.PLUGIN_PULL_REPLICATION)
public <F1> Timer1<F1> newTimer(String name, Description desc, Field<F1> field1) {
return new Timer1<>(name, field1) {
@Override
protected void doRecord(F1 field1, long value, TimeUnit unit) {
getTimerValue(name).add(value);
}
@Override
public void remove() {}
};
}
}
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