| /** |
| * 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 org.apache.distributedlog.logsegment; |
| |
| import java.util.List; |
| import java.util.concurrent.CompletableFuture; |
| import org.apache.distributedlog.Entry; |
| import org.apache.distributedlog.io.AsyncCloseable; |
| |
| /** |
| * An interface class to read entries {@link org.apache.distributedlog.Entry} |
| * from a random access log segment. |
| */ |
| public interface LogSegmentRandomAccessEntryReader extends AsyncCloseable { |
| |
| /** |
| * Read entries [startEntryId, endEntryId] from a random access log segment. |
| * |
| * @param startEntryId start entry id |
| * @param endEntryId end entry id |
| * @return A promise that when satisfied will contain a list of entries of [startEntryId, endEntryId]. |
| */ |
| CompletableFuture<List<Entry.Reader>> readEntries(long startEntryId, long endEntryId); |
| |
| /** |
| * Return the last add confirmed entry id (LAC). |
| * |
| * @return the last add confirmed entry id. |
| */ |
| long getLastAddConfirmed(); |
| } |