| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.twitter.distributedlog.subscription; |
| |
| import com.twitter.distributedlog.DLSN; |
| import com.twitter.util.Future; |
| import scala.runtime.BoxedUnit; |
| |
| import java.io.Closeable; |
| import java.util.Map; |
| |
| /** |
| * Store to manage subscriptions |
| */ |
| public interface SubscriptionsStore extends Closeable { |
| |
| /** |
| * Get the last committed position stored for <i>subscriberId</i>. |
| * |
| * @param subscriberId |
| * subscriber id |
| * @return future representing last committed position. |
| */ |
| public Future<DLSN> getLastCommitPosition(String subscriberId); |
| |
| /** |
| * Get the last committed positions for all subscribers. |
| * |
| * @return future representing last committed positions for all subscribers. |
| */ |
| public Future<Map<String, DLSN>> getLastCommitPositions(); |
| |
| /** |
| * Advance the last committed position for <i>subscriberId</i>. |
| * |
| * @param subscriberId |
| * subscriber id. |
| * @param newPosition |
| * new committed position. |
| * @return future representing advancing result. |
| */ |
| public Future<BoxedUnit> advanceCommitPosition(String subscriberId, DLSN newPosition); |
| |
| } |