/
ActivityFramesTracker.java
198 lines (167 loc) · 6.9 KB
/
ActivityFramesTracker.java
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package io.sentry.android.core;
import static io.sentry.protocol.MeasurementValue.NONE_UNIT;
import android.app.Activity;
import android.util.SparseIntArray;
import androidx.core.app.FrameMetricsAggregator;
import io.sentry.ILogger;
import io.sentry.protocol.MeasurementValue;
import io.sentry.protocol.SentryId;
import java.util.HashMap;
import java.util.Map;
import java.util.WeakHashMap;
import java.util.concurrent.ConcurrentHashMap;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.annotations.TestOnly;
/**
* A class that tracks slow and frozen frames using the FrameMetricsAggregator class from
* androidx.core package. It also checks if the FrameMetricsAggregator class is available at
* runtime.
*/
public final class ActivityFramesTracker {
private @Nullable FrameMetricsAggregator frameMetricsAggregator = null;
private boolean androidXAvailable = true;
private final @NotNull Map<SentryId, Map<String, @NotNull MeasurementValue>>
activityMeasurements = new ConcurrentHashMap<>();
private final @NotNull Map<Activity, FrameCounts> frameCountAtStartSnapshots =
new WeakHashMap<>();
public ActivityFramesTracker(final @NotNull LoadClass loadClass, final @Nullable ILogger logger) {
androidXAvailable =
loadClass.isClassAvailable("androidx.core.app.FrameMetricsAggregator", logger);
if (androidXAvailable) {
frameMetricsAggregator = new FrameMetricsAggregator();
}
}
public ActivityFramesTracker(final @NotNull LoadClass loadClass) {
this(loadClass, null);
}
@TestOnly
ActivityFramesTracker(final @Nullable FrameMetricsAggregator frameMetricsAggregator) {
this.frameMetricsAggregator = frameMetricsAggregator;
}
private boolean isFrameMetricsAggregatorAvailable() {
return androidXAvailable && frameMetricsAggregator != null;
}
@SuppressWarnings("NullAway")
public synchronized void addActivity(final @NotNull Activity activity) {
if (!isFrameMetricsAggregatorAvailable()) {
return;
}
frameMetricsAggregator.add(activity);
snapshotFrameCountsAtStart(activity);
}
private void snapshotFrameCountsAtStart(final @NotNull Activity activity) {
FrameCounts frameCounts = calculateCurrentFrameCounts();
if (frameCounts != null) {
frameCountAtStartSnapshots.put(activity, frameCounts);
}
}
private @Nullable FrameCounts calculateCurrentFrameCounts() {
if (!isFrameMetricsAggregatorAvailable()) {
return null;
}
if (frameMetricsAggregator == null) {
return null;
}
final @Nullable SparseIntArray[] framesRates = frameMetricsAggregator.getMetrics();
int totalFrames = 0;
int slowFrames = 0;
int frozenFrames = 0;
if (framesRates != null && framesRates.length > 0) {
final SparseIntArray totalIndexArray = framesRates[FrameMetricsAggregator.TOTAL_INDEX];
if (totalIndexArray != null) {
for (int i = 0; i < totalIndexArray.size(); i++) {
int frameTime = totalIndexArray.keyAt(i);
int numFrames = totalIndexArray.valueAt(i);
totalFrames += numFrames;
// hard coded values, its also in the official android docs and frame metrics API
if (frameTime > 700) {
// frozen frames, threshold is 700ms
frozenFrames += numFrames;
} else if (frameTime > 16) {
// slow frames, above 16ms, 60 frames/second
slowFrames += numFrames;
}
}
}
}
return new FrameCounts(totalFrames, slowFrames, frozenFrames);
}
@SuppressWarnings("NullAway")
public synchronized void setMetrics(
final @NotNull Activity activity, final @NotNull SentryId transactionId) {
if (!isFrameMetricsAggregatorAvailable()) {
return;
}
try {
// NOTE: removing an activity does not reset the frame counts, only reset() does
frameMetricsAggregator.remove(activity);
} catch (Throwable ignored) {
// throws IllegalArgumentException when attempting to remove OnFrameMetricsAvailableListener
// that was never added.
// there's no contains method.
// throws NullPointerException when attempting to remove OnFrameMetricsAvailableListener and
// there was no
// Observers, See
// https://android.googlesource.com/platform/frameworks/base/+/140ff5ea8e2d99edc3fbe63a43239e459334c76b
}
final @Nullable FrameCounts frameCounts = diffFrameCountsAtEnd(activity);
if (frameCounts == null
|| (frameCounts.totalFrames == 0
&& frameCounts.slowFrames == 0
&& frameCounts.frozenFrames == 0)) {
return;
}
final MeasurementValue tfValues = new MeasurementValue(frameCounts.totalFrames, NONE_UNIT);
final MeasurementValue sfValues = new MeasurementValue(frameCounts.slowFrames, NONE_UNIT);
final MeasurementValue ffValues = new MeasurementValue(frameCounts.frozenFrames, NONE_UNIT);
final Map<String, @NotNull MeasurementValue> measurements = new HashMap<>();
measurements.put("frames_total", tfValues);
measurements.put("frames_slow", sfValues);
measurements.put("frames_frozen", ffValues);
activityMeasurements.put(transactionId, measurements);
}
private @Nullable FrameCounts diffFrameCountsAtEnd(final @NotNull Activity activity) {
@Nullable final FrameCounts frameCountsAtStart = frameCountAtStartSnapshots.remove(activity);
if (frameCountsAtStart == null) {
return null;
}
@Nullable final FrameCounts frameCountsAtEnd = calculateCurrentFrameCounts();
if (frameCountsAtEnd == null) {
return null;
}
final int diffTotalFrames = frameCountsAtEnd.totalFrames - frameCountsAtStart.totalFrames;
final int diffSlowFrames = frameCountsAtEnd.slowFrames - frameCountsAtStart.slowFrames;
final int diffFrozenFrames = frameCountsAtEnd.frozenFrames - frameCountsAtStart.frozenFrames;
return new FrameCounts(diffTotalFrames, diffSlowFrames, diffFrozenFrames);
}
@Nullable
public synchronized Map<String, @NotNull MeasurementValue> takeMetrics(
final @NotNull SentryId transactionId) {
if (!isFrameMetricsAggregatorAvailable()) {
return null;
}
final Map<String, @NotNull MeasurementValue> stringMeasurementValueMap =
activityMeasurements.get(transactionId);
activityMeasurements.remove(transactionId);
return stringMeasurementValueMap;
}
@SuppressWarnings("NullAway")
public synchronized void stop() {
if (isFrameMetricsAggregatorAvailable()) {
frameMetricsAggregator.stop();
frameMetricsAggregator.reset();
}
activityMeasurements.clear();
}
private static final class FrameCounts {
private final int totalFrames;
private final int slowFrames;
private final int frozenFrames;
private FrameCounts(final int totalFrames, final int slowFrames, final int frozenFrames) {
this.totalFrames = totalFrames;
this.slowFrames = slowFrames;
this.frozenFrames = frozenFrames;
}
}
}