Examples with Continuation com.parse.boltsinternal.Continuation used on opensource projects

Example 6 with Continuation

use of com.parse.boltsinternal.Continuation in project Parse-SDK-Android by ParsePlatform.

the class OfflineStore method getOrCreateUUIDAsync.

/**
 * Gets the UUID for the given object, if it has one. Otherwise, creates a new UUID for the
 * object and adds a new row to the database for the object with no data.
 */
private Task<String> getOrCreateUUIDAsync(final ParseObject object, ParseSQLiteDatabase db) {
    final String newUUID = UUID.randomUUID().toString();
    final TaskCompletionSource<String> tcs = new TaskCompletionSource<>();
    synchronized (lock) {
        Task<String> uuidTask = objectToUuidMap.get(object);
        if (uuidTask != null) {
            return uuidTask;
        }
        // The object doesn't have a UUID yet, so we're gonna have to make one.
        objectToUuidMap.put(object, tcs.getTask());
        uuidToObjectMap.put(newUUID, object);
        fetchedObjects.put(object, tcs.getTask().onSuccess(task -> object));
    }
    /*
         * We need to put a placeholder row in the database so that later on, the save can just be an
         * update. This could be a pointer to an object that itself never gets saved offline, in which
         * case the consumer will just have to deal with that.
         */
    ContentValues values = new ContentValues();
    values.put(OfflineSQLiteOpenHelper.KEY_UUID, newUUID);
    values.put(OfflineSQLiteOpenHelper.KEY_CLASS_NAME, object.getClassName());
    db.insertOrThrowAsync(OfflineSQLiteOpenHelper.TABLE_OBJECTS, values).continueWith((Continuation<Void, Void>) task -> {
        tcs.setResult(newUUID);
        return null;
    });
    return tcs.getTask();
}