hazelcast-master/hazelcast/src/main/java/com/hazelcast/cp/internal/raft/impl/persistence/NopRaftStateStore.java
/*
 * Copyright (c) 2008-2023, Hazelcast, Inc. All Rights Reserved.
 *
 * Licensed 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.hazelcast.cp.internal.raft.impl.persistence;

import com.hazelcast.cp.internal.raft.impl.RaftEndpoint;
import com.hazelcast.cp.internal.raft.impl.log.LogEntry;
import com.hazelcast.cp.internal.raft.impl.log.SnapshotEntry;

import javax.annotation.Nonnull;
import java.util.Collection;

/**
 * Used when a Raft node works transiently (its state is not persisted).
 */
public final class NopRaftStateStore implements RaftStateStore {

    /**
     * Non-persisting {@link RaftStateStore} instance
     */
    public static final RaftStateStore INSTANCE = new NopRaftStateStore();

    private NopRaftStateStore() {
    }

    @Override
    public void open() {
    }

    @Override
    public void persistInitialMembers(
            @Nonnull RaftEndpoint localMember,
            @Nonnull Collection<RaftEndpoint> initialMembers
    ) {
    }

    @Override
    public void persistTerm(int term, @Nonnull RaftEndpoint votedFor) {
    }

    @Override
    public void persistEntry(@Nonnull LogEntry entry) {
    }

    @Override
    public void persistSnapshot(@Nonnull SnapshotEntry entry) {
    }

    @Override
    public void deleteEntriesFrom(long startIndexInclusive) {
    }

    @Override
    public void flushLogs() {
    }

    @Override
    public void close() {
    }
}
