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/*
* Copyright 2016-17, OpenCensus Authors
*
* 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 io.opencensus.stats;
import com.google.auto.value.AutoValue;
import io.opencensus.common.Duration;
import io.opencensus.common.Function;
import io.opencensus.common.Functions;
import io.opencensus.common.Timestamp;
import io.opencensus.stats.Aggregation.Count;
import io.opencensus.stats.Aggregation.Distribution;
import io.opencensus.stats.Aggregation.LastValue;
import io.opencensus.stats.Aggregation.Sum;
import io.opencensus.stats.AggregationData.CountData;
import io.opencensus.stats.AggregationData.DistributionData;
import io.opencensus.stats.AggregationData.LastValueDataDouble;
import io.opencensus.stats.AggregationData.LastValueDataLong;
import io.opencensus.stats.AggregationData.SumDataDouble;
import io.opencensus.stats.AggregationData.SumDataLong;
import io.opencensus.stats.Measure.MeasureDouble;
import io.opencensus.stats.Measure.MeasureLong;
import io.opencensus.tags.TagValue;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import javax.annotation.concurrent.Immutable;
/*>>>
import org.checkerframework.checker.nullness.qual.Nullable;
*/
/**
* The aggregated data for a particular {@link View}.
*
* @since 0.8
*/
@Immutable
@AutoValue
@AutoValue.CopyAnnotations
@SuppressWarnings("deprecation")
public abstract class ViewData {
// Prevents this class from being subclassed anywhere else.
ViewData() {}
/**
* The {@link View} associated with this {@link ViewData}.
*
* @since 0.8
*/
public abstract View getView();
/**
* The {@link AggregationData} grouped by combination of tag values, associated with this {@link
* ViewData}.
*
* @since 0.8
*/
public abstract Map, AggregationData> getAggregationMap();
/**
* Returns the {@link AggregationWindowData} associated with this {@link ViewData}.
*
* {@link AggregationWindowData} is deprecated since 0.13, please avoid using this method. Use
* {@link #getStart()} and {@link #getEnd()} instead.
*
* @return the {@code AggregationWindowData}.
* @since 0.8
* @deprecated in favor of {@link #getStart()} and {@link #getEnd()}.
*/
@Deprecated
public abstract AggregationWindowData getWindowData();
/**
* Returns the start {@code Timestamp} for a {@link ViewData}.
*
* @return the start {@code Timestamp}.
* @since 0.13
*/
public abstract Timestamp getStart();
/**
* Returns the end {@code Timestamp} for a {@link ViewData}.
*
* @return the end {@code Timestamp}.
* @since 0.13
*/
public abstract Timestamp getEnd();
/**
* Constructs a new {@link ViewData}.
*
* @param view the {@link View} associated with this {@link ViewData}.
* @param map the mapping from {@link TagValue} list to {@link AggregationData}.
* @param windowData the {@link AggregationWindowData}.
* @return a {@code ViewData}.
* @throws IllegalArgumentException if the types of {@code Aggregation} and {@code
* AggregationData} don't match, or the types of {@code Window} and {@code WindowData} don't
* match.
* @since 0.8
* @deprecated in favor of {@link #create(View, Map, Timestamp, Timestamp)}.
*/
@Deprecated
public static ViewData create(
final View view,
Map, ? extends AggregationData> map,
final AggregationWindowData windowData) {
checkWindow(view.getWindow(), windowData);
final Map, AggregationData> deepCopy =
new HashMap, AggregationData>();
for (Entry, ? extends AggregationData> entry :
map.entrySet()) {
checkAggregation(view.getAggregation(), entry.getValue(), view.getMeasure());
deepCopy.put(
Collections.unmodifiableList(new ArrayList(entry.getKey())),
entry.getValue());
}
return windowData.match(
new Function() {
@Override
public ViewData apply(ViewData.AggregationWindowData.CumulativeData arg) {
return createInternal(
view, Collections.unmodifiableMap(deepCopy), arg, arg.getStart(), arg.getEnd());
}
},
new Function() {
@Override
public ViewData apply(ViewData.AggregationWindowData.IntervalData arg) {
Duration duration = ((View.AggregationWindow.Interval) view.getWindow()).getDuration();
return createInternal(
view,
Collections.unmodifiableMap(deepCopy),
arg,
arg.getEnd()
.addDuration(Duration.create(-duration.getSeconds(), -duration.getNanos())),
arg.getEnd());
}
},
Functions.throwAssertionError());
}
/**
* Constructs a new {@link ViewData}.
*
* @param view the {@link View} associated with this {@link ViewData}.
* @param map the mapping from {@link TagValue} list to {@link AggregationData}.
* @param start the start {@link Timestamp} for this {@link ViewData}.
* @param end the end {@link Timestamp} for this {@link ViewData}.
* @return a {@code ViewData}.
* @throws IllegalArgumentException if the types of {@code Aggregation} and {@code
* AggregationData} don't match.
* @since 0.13
*/
public static ViewData create(
View view,
Map, ? extends AggregationData> map,
Timestamp start,
Timestamp end) {
Map, AggregationData> deepCopy =
new HashMap, AggregationData>();
for (Entry, ? extends AggregationData> entry :
map.entrySet()) {
checkAggregation(view.getAggregation(), entry.getValue(), view.getMeasure());
deepCopy.put(
Collections.unmodifiableList(new ArrayList(entry.getKey())),
entry.getValue());
}
return createInternal(
view,
Collections.unmodifiableMap(deepCopy),
AggregationWindowData.CumulativeData.create(start, end),
start,
end);
}
// Suppresses a nullness warning about calls to the AutoValue_ViewData constructor. The generated
// constructor does not have the @Nullable annotation on TagValue.
private static ViewData createInternal(
View view,
Map, AggregationData> aggregationMap,
AggregationWindowData window,
Timestamp start,
Timestamp end) {
@SuppressWarnings("nullness")
Map, AggregationData> map = aggregationMap;
return new AutoValue_ViewData(view, map, window, start, end);
}
private static void checkWindow(
View.AggregationWindow window, final AggregationWindowData windowData) {
window.match(
new Function() {
@Override
public Void apply(View.AggregationWindow.Cumulative arg) {
throwIfWindowMismatch(
windowData instanceof AggregationWindowData.CumulativeData, arg, windowData);
return null;
}
},
new Function() {
@Override
public Void apply(View.AggregationWindow.Interval arg) {
throwIfWindowMismatch(
windowData instanceof AggregationWindowData.IntervalData, arg, windowData);
return null;
}
},
Functions.throwAssertionError());
}
private static void throwIfWindowMismatch(
boolean isValid, View.AggregationWindow window, AggregationWindowData windowData) {
if (!isValid) {
throw new IllegalArgumentException(createErrorMessageForWindow(window, windowData));
}
}
private static String createErrorMessageForWindow(
View.AggregationWindow window, AggregationWindowData windowData) {
return "AggregationWindow and AggregationWindowData types mismatch. "
+ "AggregationWindow: "
+ window.getClass().getSimpleName()
+ " AggregationWindowData: "
+ windowData.getClass().getSimpleName();
}
private static void checkAggregation(
final Aggregation aggregation, final AggregationData aggregationData, final Measure measure) {
aggregation.match(
new Function() {
@Override
public Void apply(Sum arg) {
measure.match(
new Function() {
@Override
public Void apply(MeasureDouble arg) {
throwIfAggregationMismatch(
aggregationData instanceof SumDataDouble, aggregation, aggregationData);
return null;
}
},
new Function() {
@Override
public Void apply(MeasureLong arg) {
throwIfAggregationMismatch(
aggregationData instanceof SumDataLong, aggregation, aggregationData);
return null;
}
},
Functions.throwAssertionError());
return null;
}
},
new Function() {
@Override
public Void apply(Count arg) {
throwIfAggregationMismatch(
aggregationData instanceof CountData, aggregation, aggregationData);
return null;
}
},
new Function() {
@Override
public Void apply(Distribution arg) {
throwIfAggregationMismatch(
aggregationData instanceof DistributionData, aggregation, aggregationData);
return null;
}
},
new Function() {
@Override
public Void apply(LastValue arg) {
measure.match(
new Function() {
@Override
public Void apply(MeasureDouble arg) {
throwIfAggregationMismatch(
aggregationData instanceof LastValueDataDouble,
aggregation,
aggregationData);
return null;
}
},
new Function() {
@Override
public Void apply(MeasureLong arg) {
throwIfAggregationMismatch(
aggregationData instanceof LastValueDataLong, aggregation, aggregationData);
return null;
}
},
Functions.throwAssertionError());
return null;
}
},
new Function() {
@Override
public Void apply(Aggregation arg) {
// TODO(songya): remove this once Mean aggregation is completely removed. Before that
// we need to continue supporting Mean, since it could still be used by users and some
// deprecated RPC views.
if (arg instanceof Aggregation.Mean) {
throwIfAggregationMismatch(
aggregationData instanceof AggregationData.MeanData,
aggregation,
aggregationData);
return null;
}
throw new AssertionError();
}
});
}
private static void throwIfAggregationMismatch(
boolean isValid, Aggregation aggregation, AggregationData aggregationData) {
if (!isValid) {
throw new IllegalArgumentException(
createErrorMessageForAggregation(aggregation, aggregationData));
}
}
private static String createErrorMessageForAggregation(
Aggregation aggregation, AggregationData aggregationData) {
return "Aggregation and AggregationData types mismatch. "
+ "Aggregation: "
+ aggregation.getClass().getSimpleName()
+ " AggregationData: "
+ aggregationData.getClass().getSimpleName();
}
/**
* The {@code AggregationWindowData} for a {@link ViewData}.
*
* @since 0.8
* @deprecated since 0.13, please use start and end {@link Timestamp} instead.
*/
@Deprecated
@Immutable
public abstract static class AggregationWindowData {
private AggregationWindowData() {}
/**
* Applies the given match function to the underlying data type.
*
* @since 0.8
*/
public abstract T match(
Function p0,
Function p1,
Function defaultFunction);
/**
* Cumulative {@code AggregationWindowData}.
*
* @since 0.8
* @deprecated since 0.13, please use start and end {@link Timestamp} instead.
*/
@Deprecated
@Immutable
@AutoValue
@AutoValue.CopyAnnotations
public abstract static class CumulativeData extends AggregationWindowData {
CumulativeData() {}
/**
* Returns the start {@code Timestamp} for a {@link CumulativeData}.
*
* @return the start {@code Timestamp}.
* @since 0.8
*/
public abstract Timestamp getStart();
/**
* Returns the end {@code Timestamp} for a {@link CumulativeData}.
*
* @return the end {@code Timestamp}.
* @since 0.8
*/
public abstract Timestamp getEnd();
@Override
public final T match(
Function p0,
Function p1,
Function defaultFunction) {
return p0.apply(this);
}
/**
* Constructs a new {@link CumulativeData}.
*
* @since 0.8
*/
public static CumulativeData create(Timestamp start, Timestamp end) {
if (start.compareTo(end) > 0) {
throw new IllegalArgumentException("Start time is later than end time.");
}
return new AutoValue_ViewData_AggregationWindowData_CumulativeData(start, end);
}
}
/**
* Interval {@code AggregationWindowData}.
*
* @since 0.8
* @deprecated since 0.13, please use start and end {@link Timestamp} instead.
*/
@Deprecated
@Immutable
@AutoValue
@AutoValue.CopyAnnotations
public abstract static class IntervalData extends AggregationWindowData {
IntervalData() {}
/**
* Returns the end {@code Timestamp} for an {@link IntervalData}.
*
* @return the end {@code Timestamp}.
* @since 0.8
*/
public abstract Timestamp getEnd();
@Override
public final T match(
Function p0,
Function p1,
Function defaultFunction) {
return p1.apply(this);
}
/**
* Constructs a new {@link IntervalData}.
*
* @since 0.8
*/
public static IntervalData create(Timestamp end) {
return new AutoValue_ViewData_AggregationWindowData_IntervalData(end);
}
}
}
}