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 writer of {@link ByteBufJournal} entries.
24 public interface ByteBufWriter {
26 * Returns the next index to be written.
28 * @return The next index to be written
33 * Appends an entry to the journal.
35 * @param mapper a {@link ByteBufMapper} to use with entry
36 * @param entry entry to append
37 * @return the on-disk size of the entry
39 // FIXME: throws IOException
40 <T> int append(ByteBufMapper<T> mapper, T entry);
43 * Commits entries up to the given index.
45 * @param index The index up to which to commit entries.
47 void commit(long index);
50 * Resets the head of the journal to the given index.
52 * @param index the next index to write
53 * @throws IndexOutOfBoundsException if the journal cannot be reset to specified index
55 // FIXME: throws IOException
56 void reset(long index);
59 * Flushes written entries to disk.
61 // FIXME: throws IOException