/*
 * 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.reverse;

import static java.lang.String.format;

import org.neo4j.logging.InternalLog;

public class ReverseTransactionCursorLoggingMonitor implements ReversedTransactionCursorMonitor {
    private final InternalLog log;

    public ReverseTransactionCursorLoggingMonitor(InternalLog log) {
        this.log = log;
    }

    @Override
    public void transactionalLogRecordReadFailure(long[] transactionOffsets, int transactionIndex, long logVersion) {
        log.warn(
                transactionIndex > 0
                        ? format(
                                "Fail to read transaction log version %d. Last valid transaction start offset is: %d.",
                                logVersion, transactionOffsets[transactionIndex - 1])
                        : format("Fail to read first transaction of log version %d.", logVersion));
    }

    @Override
    public void presketchingTransactionLogs() {
        log.debug("Pre-sketching transaction logs in the background.");
    }
}
