Examples with LogHeaderReader.readLogHeader org.neo4j.kernel.impl.transaction.log.entry.LogHeaderReader.readLogHeader used on opensource projects

Example 1 with LogHeaderReader.readLogHeader

use of org.neo4j.kernel.impl.transaction.log.entry.LogHeaderReader.readLogHeader in project neo4j by neo4j.

the class LogTestUtils method openLogEntryCursor.

private static LogEntryCursor openLogEntryCursor(FileSystemAbstraction fs, File firstFile, LogVersionBridge versionBridge) {
    StoreChannel channel = null;
    try {
        channel = fs.open(firstFile, "r");
        ByteBuffer buffer = ByteBuffer.allocate(LogHeader.LOG_HEADER_SIZE);
        LogHeader header = LogHeaderReader.readLogHeader(buffer, channel, true, firstFile);
        PhysicalLogVersionedStoreChannel logVersionedChannel = new PhysicalLogVersionedStoreChannel(channel, header.logVersion, header.logFormatVersion);
        ReadableLogChannel logChannel = new ReadAheadLogChannel(logVersionedChannel, versionBridge, ReadAheadLogChannel.DEFAULT_READ_AHEAD_SIZE);
        return new LogEntryCursor(new VersionAwareLogEntryReader<>(), logChannel);
    } catch (Throwable t) {
        if (channel != null) {
            try {
                channel.close();
            } catch (IOException e) {
                t.addSuppressed(e);
            }
        }
        throw new RuntimeException(t);
    }
}