/
MetricRegistryTestUtils.java
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/
MetricRegistryTestUtils.java
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/*
* Copyright 2020 Google LLC
*
* 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
*
* https://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.cloud.spanner;
import com.google.common.collect.Maps;
import io.opencensus.common.ToLongFunction;
import io.opencensus.metrics.DerivedDoubleCumulative;
import io.opencensus.metrics.DerivedDoubleGauge;
import io.opencensus.metrics.DerivedLongCumulative;
import io.opencensus.metrics.DerivedLongGauge;
import io.opencensus.metrics.DoubleCumulative;
import io.opencensus.metrics.DoubleGauge;
import io.opencensus.metrics.LabelKey;
import io.opencensus.metrics.LabelValue;
import io.opencensus.metrics.LongCumulative;
import io.opencensus.metrics.LongGauge;
import io.opencensus.metrics.MetricOptions;
import io.opencensus.metrics.MetricRegistry;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
class MetricRegistryTestUtils {
static class PointWithFunction<T> {
private final T ref;
private final ToLongFunction<T> function;
private final List<LabelKey> key;
private final List<LabelValue> values;
PointWithFunction(
T obj, ToLongFunction<T> function, List<LabelKey> keys, List<LabelValue> values) {
this.ref = obj;
this.function = function;
this.key = keys;
this.values = values;
}
long value() {
return function.applyAsLong(ref);
}
List<LabelKey> keys() {
return key;
}
List<LabelValue> values() {
return values;
}
}
static class MetricsRecord {
private final Map<String, List<PointWithFunction>> metrics;
private MetricsRecord() {
this.metrics = Maps.newHashMap();
}
Map<String, List<PointWithFunction>> getMetrics() {
return metrics;
}
}
public static final class FakeDerivedLongGauge extends DerivedLongGauge {
private final MetricsRecord record;
private final String name;
private final List<LabelKey> labelKeys;
private FakeDerivedLongGauge(
FakeMetricRegistry metricRegistry, String name, List<LabelKey> labelKeys) {
this.record = metricRegistry.record;
this.labelKeys = labelKeys;
this.name = name;
}
@Override
public <T> void createTimeSeries(
List<LabelValue> labelValues, T t, ToLongFunction<T> toLongFunction) {
if (!this.record.metrics.containsKey(this.name)) {
this.record.metrics.put(this.name, new ArrayList<PointWithFunction>());
}
this.record
.metrics
.get(this.name)
.add(new PointWithFunction(t, toLongFunction, labelKeys, labelValues));
}
@Override
public void removeTimeSeries(List<LabelValue> list) {}
@Override
public void clear() {}
}
public static final class FakeDerivedLongCumulative extends DerivedLongCumulative {
private final MetricsRecord record;
private final String name;
private final List<LabelKey> labelKeys;
private FakeDerivedLongCumulative(
FakeMetricRegistry metricRegistry, String name, List<LabelKey> labelKeys) {
this.record = metricRegistry.record;
this.labelKeys = labelKeys;
this.name = name;
}
@Override
public <T> void createTimeSeries(
List<LabelValue> labelValues, T t, ToLongFunction<T> toLongFunction) {
if (!this.record.metrics.containsKey(this.name)) {
this.record.metrics.put(this.name, new ArrayList<PointWithFunction>());
}
this.record
.metrics
.get(this.name)
.add(new PointWithFunction(t, toLongFunction, labelKeys, labelValues));
}
@Override
public void removeTimeSeries(List<LabelValue> list) {}
@Override
public void clear() {}
}
/**
* A {@link MetricRegistry} implementation that saves metrics records to be accessible from {@link
* #pollRecord()}.
*/
public static final class FakeMetricRegistry extends MetricRegistry {
private MetricsRecord record;
FakeMetricRegistry() {
record = new MetricsRecord();
}
MetricsRecord pollRecord() {
return record;
}
@Override
public DerivedLongGauge addDerivedLongGauge(String s, MetricOptions metricOptions) {
return new FakeDerivedLongGauge(this, s, metricOptions.getLabelKeys());
}
@Override
public LongGauge addLongGauge(String s, MetricOptions metricOptions) {
throw new UnsupportedOperationException();
}
@Override
public DoubleGauge addDoubleGauge(String s, MetricOptions metricOptions) {
throw new UnsupportedOperationException();
}
@Override
public DerivedDoubleGauge addDerivedDoubleGauge(String s, MetricOptions metricOptions) {
throw new UnsupportedOperationException();
}
@Override
public LongCumulative addLongCumulative(String s, MetricOptions metricOptions) {
throw new UnsupportedOperationException();
}
@Override
public DoubleCumulative addDoubleCumulative(String s, MetricOptions metricOptions) {
throw new UnsupportedOperationException();
}
@Override
public DerivedLongCumulative addDerivedLongCumulative(String s, MetricOptions metricOptions) {
return new FakeDerivedLongCumulative(this, s, metricOptions.getLabelKeys());
}
@Override
public DerivedDoubleCumulative addDerivedDoubleCumulative(
String s, MetricOptions metricOptions) {
throw new UnsupportedOperationException();
}
}
}