public ProcedureWALTrailer readTrailer() throws IOException {
try {
return ProcedureWALFormat.readTrailer(stream, startPos, logStatus.getLen());
} finally {
stream.seek(startPos);
}
}
public void open() throws IOException {
if (stream == null) {
stream = fs.open(logFile);
}
if (header == null) {
header = ProcedureWALFormat.readHeader(stream);
startPos = stream.getPos();
} else {
stream.seek(startPos);
}
}