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/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko;
import org.json.JSONException;
import org.json.JSONObject;
import android.os.SystemClock;
import android.util.Log;
public class Telemetry {
private static final String LOGTAG = "Telemetry";
// Define new histograms in:
// toolkit/components/telemetry/Histograms.json
public static void HistogramAdd(String name,
int value) {
try {
JSONObject jsonData = new JSONObject();
jsonData.put("name", name);
jsonData.put("value", value);
GeckoEvent event =
GeckoEvent.createBroadcastEvent("Telemetry:Add", jsonData.toString());
GeckoAppShell.sendEventToGecko(event);
} catch (JSONException e) {
Log.e(LOGTAG, "JSON exception: ", e);
}
}
public static class Timer {
private long mStartTime;
private String mName;
private boolean mHasFinished;
private volatile long mElapsed = -1;
public Timer(String name) {
mName = name;
mStartTime = SystemClock.uptimeMillis();
mHasFinished = false;
}
public void cancel() {
mHasFinished = true;
}
public long getElapsed() {
return mElapsed;
}
public void stop() {
// Only the first stop counts.
if (mHasFinished) {
return;
} else {
mHasFinished = true;
}
final long elapsed = SystemClock.uptimeMillis() - mStartTime;
mElapsed = elapsed;
if (elapsed < Integer.MAX_VALUE) {
HistogramAdd(mName, (int)(elapsed));
} else {
Log.e(LOGTAG, "Duration of " + elapsed + " ms is too long to add to histogram.");
}
}
}
}
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