Examples with UfsJournalReader alluxio.master.journal.ufs.UfsJournalReader used on opensource projects

Example 1 with UfsJournalReader

use of alluxio.master.journal.ufs.UfsJournalReader in project alluxio by Alluxio.

the class UfsJournalDumper method dumpJournal.

@Override
public void dumpJournal() throws Throwable {
    try (UfsJournal journal = new UfsJournalSystem(getJournalLocation(mInputDir), 0).createJournal(new NoopMaster(mMaster));
        PrintStream out = new PrintStream(new BufferedOutputStream(new FileOutputStream(mJournalEntryFile)));
        JournalReader reader = new UfsJournalReader(journal, mStart, true)) {
        boolean done = false;
        while (!done && reader.getNextSequenceNumber() < mEnd) {
            JournalReader.State state = reader.advance();
            switch(state) {
                case CHECKPOINT:
                    try (CheckpointInputStream checkpoint = reader.getCheckpoint()) {
                        Path dir = Paths.get(mCheckpointsDir + "-" + reader.getNextSequenceNumber());
                        Files.createDirectories(dir);
                        readCheckpoint(checkpoint, dir);
                    }
                    break;
                case LOG:
                    Journal.JournalEntry entry = reader.getEntry();
                    out.println(ENTRY_SEPARATOR);
                    out.print(entry);
                    break;
                case DONE:
                    done = true;
                    break;
                default:
                    throw new RuntimeException("Unknown state: " + state);
            }
        }
    }
}