/*
* +-----------------+
* | END OF WAL DATA | <---+
* +-----------------+ |
* | | |
* | Tracker | |
* | | |
* +-----------------+ |
* | version | |
* +-----------------+ |
* | TRAILER_MAGIC | |
* +-----------------+ |
* | offset |-----+
* +-----------------+
*/
public static long writeTrailer(FSDataOutputStream stream, ProcedureStoreTracker tracker)
throws IOException {
long offset = stream.getPos();
// Write EOF Entry
ProcedureWALEntry.newBuilder()
.setType(ProcedureWALEntry.Type.PROCEDURE_WAL_EOF)
.build()
.writeDelimitedTo(stream);
// Write Tracker
tracker.writeTo(stream);
stream.write(TRAILER_VERSION);
StreamUtils.writeLong(stream, TRAILER_MAGIC);
StreamUtils.writeLong(stream, offset);
return stream.getPos() - offset;
}
