The Tor Browser / file comparison
comparison: mobile/android/base/sync/PrefsBackoffHandler.java
mobile/android/base/sync/PrefsBackoffHandler.java
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:4e6bf58c9757 |
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 package org.mozilla.gecko.sync; | |
| 6 | |
| 7 import android.content.SharedPreferences; | |
| 8 import android.content.SharedPreferences.Editor; | |
| 9 | |
| 10 public class PrefsBackoffHandler implements BackoffHandler { | |
| 11 public static final String PREF_EARLIEST_NEXT = "earliestnext"; | |
| 12 | |
| 13 private final SharedPreferences prefs; | |
| 14 private final String prefEarliest; | |
| 15 | |
| 16 public PrefsBackoffHandler(final SharedPreferences prefs, final String prefSuffix) { | |
| 17 if (prefs == null) { | |
| 18 throw new IllegalArgumentException("prefs must not be null."); | |
| 19 } | |
| 20 this.prefs = prefs; | |
| 21 this.prefEarliest = PREF_EARLIEST_NEXT + "." + prefSuffix; | |
| 22 } | |
| 23 | |
| 24 @Override | |
| 25 public synchronized long getEarliestNextRequest() { | |
| 26 return prefs.getLong(prefEarliest, 0); | |
| 27 } | |
| 28 | |
| 29 @Override | |
| 30 public synchronized void setEarliestNextRequest(final long next) { | |
| 31 final Editor edit = prefs.edit(); | |
| 32 edit.putLong(prefEarliest, next); | |
| 33 edit.commit(); | |
| 34 } | |
| 35 | |
| 36 @Override | |
| 37 public synchronized void extendEarliestNextRequest(final long next) { | |
| 38 if (prefs.getLong(prefEarliest, 0) >= next) { | |
| 39 return; | |
| 40 } | |
| 41 final Editor edit = prefs.edit(); | |
| 42 edit.putLong(prefEarliest, next); | |
| 43 edit.commit(); | |
| 44 } | |
| 45 | |
| 46 /** | |
| 47 * Return the number of milliseconds until we're allowed to touch the server again, | |
| 48 * or 0 if now is fine. | |
| 49 */ | |
| 50 @Override | |
| 51 public long delayMilliseconds() { | |
| 52 long earliestNextRequest = getEarliestNextRequest(); | |
| 53 if (earliestNextRequest <= 0) { | |
| 54 return 0; | |
| 55 } | |
| 56 long now = System.currentTimeMillis(); | |
| 57 return Math.max(0, earliestNextRequest - now); | |
| 58 } | |
| 59 } |
