2 * Copyright 2017-2022 Open Networking Foundation and others. All rights reserved.
3 * Copyright (c) 2024 PANTHEON.tech, s.r.o. and others.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 package io.atomix.storage.journal;
19 import static java.util.Objects.requireNonNull;
21 import org.eclipse.jdt.annotation.NonNullByDefault;
24 * A {@link JournalWriter} backed by a {@link ByteBufWriter}.
27 final class SegmentedJournalWriter<E> implements JournalWriter<E> {
28 private final ToByteBufMapper<E> mapper;
29 private final ByteBufWriter writer;
31 SegmentedJournalWriter(final ByteBufWriter writer, final ToByteBufMapper<E> mapper) {
32 this.writer = requireNonNull(writer);
33 this.mapper = requireNonNull(mapper);
37 public long getNextIndex() {
38 return writer.nextIndex();
42 public void commit(final long index) {
47 public <T extends E> Indexed<T> append(final T entry) {
48 final var index = writer.nextIndex();
49 return new Indexed<>(index, entry, writer.append(mapper, entry));
53 public void reset(final long index) {