The Tor Browser / file comparison
comparison: mobile/android/base/sync/InfoCollections.java
mobile/android/base/sync/InfoCollections.java
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| -1:000000000000 | 0:eaf2d363779e |
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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 java.util.Collections; | |
| 8 import java.util.HashMap; | |
| 9 import java.util.Map; | |
| 10 import java.util.Map.Entry; | |
| 11 | |
| 12 import org.mozilla.gecko.background.common.log.Logger; | |
| 13 | |
| 14 /** | |
| 15 * Fetches the timestamp information in <code>info/collections</code> on the | |
| 16 * Sync server. Provides access to those timestamps, along with logic to check | |
| 17 * for whether a collection requires an update. | |
| 18 */ | |
| 19 public class InfoCollections { | |
| 20 private static final String LOG_TAG = "InfoCollections"; | |
| 21 | |
| 22 /** | |
| 23 * Fields fetched from the server, or <code>null</code> if not yet fetched. | |
| 24 * <p> | |
| 25 * Rather than storing decimal/double timestamps, as provided by the server, | |
| 26 * we convert immediately to milliseconds since epoch. | |
| 27 */ | |
| 28 final Map<String, Long> timestamps; | |
| 29 | |
| 30 public InfoCollections() { | |
| 31 this(new ExtendedJSONObject()); | |
| 32 } | |
| 33 | |
| 34 public InfoCollections(final ExtendedJSONObject record) { | |
| 35 Logger.debug(LOG_TAG, "info/collections is " + record.toJSONString()); | |
| 36 HashMap<String, Long> map = new HashMap<String, Long>(); | |
| 37 | |
| 38 for (Entry<String, Object> entry : record.entrySet()) { | |
| 39 final String key = entry.getKey(); | |
| 40 final Object value = entry.getValue(); | |
| 41 | |
| 42 // These objects are most likely going to be Doubles. Regardless, we | |
| 43 // want to get them in a more sane time format. | |
| 44 if (value instanceof Double) { | |
| 45 map.put(key, Utils.decimalSecondsToMilliseconds((Double) value)); | |
| 46 continue; | |
| 47 } | |
| 48 if (value instanceof Long) { | |
| 49 map.put(key, Utils.decimalSecondsToMilliseconds((Long) value)); | |
| 50 continue; | |
| 51 } | |
| 52 if (value instanceof Integer) { | |
| 53 map.put(key, Utils.decimalSecondsToMilliseconds((Integer) value)); | |
| 54 continue; | |
| 55 } | |
| 56 Logger.warn(LOG_TAG, "Skipping info/collections entry for " + key); | |
| 57 } | |
| 58 | |
| 59 this.timestamps = Collections.unmodifiableMap(map); | |
| 60 } | |
| 61 | |
| 62 /** | |
| 63 * Return the timestamp for the given collection, or null if the timestamps | |
| 64 * have not been fetched or the given collection does not have a timestamp. | |
| 65 * | |
| 66 * @param collection | |
| 67 * The collection to inspect. | |
| 68 * @return the timestamp in milliseconds since epoch. | |
| 69 */ | |
| 70 public Long getTimestamp(String collection) { | |
| 71 if (timestamps == null) { | |
| 72 return null; | |
| 73 } | |
| 74 return timestamps.get(collection); | |
| 75 } | |
| 76 | |
| 77 /** | |
| 78 * Test if a given collection needs to be updated. | |
| 79 * | |
| 80 * @param collection | |
| 81 * The collection to test. | |
| 82 * @param lastModified | |
| 83 * Timestamp when local record was last modified. | |
| 84 */ | |
| 85 public boolean updateNeeded(String collection, long lastModified) { | |
| 86 Logger.trace(LOG_TAG, "Testing " + collection + " for updateNeeded. Local last modified is " + lastModified + "."); | |
| 87 | |
| 88 // No local record of modification time? Need an update. | |
| 89 if (lastModified <= 0) { | |
| 90 return true; | |
| 91 } | |
| 92 | |
| 93 // No meta/global on the server? We need an update. The server fetch will fail and | |
| 94 // then we will upload a fresh meta/global. | |
| 95 Long serverLastModified = getTimestamp(collection); | |
| 96 if (serverLastModified == null) { | |
| 97 return true; | |
| 98 } | |
| 99 | |
| 100 // Otherwise, we need an update if our modification time is stale. | |
| 101 return (serverLastModified.longValue() > lastModified); | |
| 102 } | |
| 103 } |
