2 * Copyright (c) 2024 PANTHEON.tech, s.r.o. and others. All rights reserved.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 package io.atomix.storage.journal;
18 import org.eclipse.jdt.annotation.NonNullByDefault;
21 * A journal of byte arrays. Provides the ability to write modify entries via {@link ByteBufWriter} and read them
22 * back via {@link ByteBufReader}.
25 public interface ByteBufJournal extends AutoCloseable {
27 * Returns the journal writer.
29 * @return The journal writer.
31 ByteBufWriter writer();
34 * Opens a new {@link ByteBufReader} reading all entries.
36 * @param index The index at which to start the reader.
37 * @return A new journal reader.
39 ByteBufReader openReader(long index);
42 * Opens a new {@link ByteBufReader} reading only committed entries.
44 * @param index The index at which to start the reader.
45 * @return A new journal reader.
47 ByteBufReader openCommitsReader(long index);