/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.kernel.impl.transaction.log;

import static org.neo4j.storageengine.api.TransactionIdStore.BASE_TX_CHECKSUM;
import static org.neo4j.storageengine.api.TransactionIdStore.BASE_TX_COMMIT_TIMESTAMP;
import static org.neo4j.storageengine.api.TransactionIdStore.BASE_TX_ID;
import static org.neo4j.storageengine.api.TransactionIdStore.UNKNOWN_CONSENSUS_INDEX;

import org.neo4j.storageengine.api.TransactionId;

public interface LogTailLogVersionsMetadata {
    TransactionId EMPTY_LAST_TRANSACTION =
            new TransactionId(BASE_TX_ID, BASE_TX_CHECKSUM, BASE_TX_COMMIT_TIMESTAMP, UNKNOWN_CONSENSUS_INDEX);

    LogTailLogVersionsMetadata EMPTY_LOG_TAIL = new EmptyLogTailLogVersionsMetadata();

    boolean isRecoveryRequired();

    long getCheckpointLogVersion();

    long getLogVersion();

    TransactionId getLastCommittedTransaction();

    LogPosition getLastTransactionLogPosition();
}
