public void handleStreamEvent(StreamEvent event) {
      if (event.eventType == StreamEvent.Type.STREAM_PREPARED) {
        SessionInfo session = ((StreamEvent.SessionPreparedEvent) event).session;
        sessionsByHost.put(session.peer, session);
      } else if (event.eventType == StreamEvent.Type.FILE_PROGRESS) {
        ProgressInfo progressInfo = ((StreamEvent.ProgressEvent) event).progress;

        // update progress
        Set<ProgressInfo> progresses = progressByHost.get(progressInfo.peer);
        if (progresses == null) {
          progresses = Sets.newSetFromMap(new ConcurrentHashMap<ProgressInfo, Boolean>());
          progressByHost.put(progressInfo.peer, progresses);
        }
        if (progresses.contains(progressInfo)) progresses.remove(progressInfo);
        progresses.add(progressInfo);

        StringBuilder sb = new StringBuilder();
        sb.append("\rprogress: ");

        long totalProgress = 0;
        long totalSize = 0;
        for (Map.Entry<InetAddress, Set<ProgressInfo>> entry : progressByHost.entrySet()) {
          SessionInfo session = sessionsByHost.get(entry.getKey());

          long size = session.getTotalSizeToSend();
          long current = 0;
          int completed = 0;
          for (ProgressInfo progress : entry.getValue()) {
            if (progress.currentBytes == progress.totalBytes) completed++;
            current += progress.currentBytes;
          }
          totalProgress += current;
          totalSize += size;
          sb.append("[").append(entry.getKey());
          sb.append(" ").append(completed).append("/").append(session.getTotalFilesToSend());
          sb.append(" (").append(size == 0 ? 100L : current * 100L / size).append("%)] ");
        }
        long time = System.nanoTime();
        long deltaTime = Math.max(1L, TimeUnit.NANOSECONDS.toMillis(time - lastTime));
        lastTime = time;
        long deltaProgress = totalProgress - lastProgress;
        lastProgress = totalProgress;

        sb.append("[total: ")
            .append(totalSize == 0 ? 100L : totalProgress * 100L / totalSize)
            .append("% - ");
        sb.append(mbPerSec(deltaProgress, deltaTime)).append("MB/s");
        sb.append(" (avg: ")
            .append(mbPerSec(totalProgress, TimeUnit.NANOSECONDS.toMillis(time - start)))
            .append("MB/s)]");

        System.out.print(sb.toString());
      }
    }
    void completed(Differencer differencer) {
      logger.debug(
          String.format(
              "[repair #%s] Repair completed between %s and %s on %s",
              getName(), differencer.r1.endpoint, differencer.r2.endpoint, differencer.cfname));
      RepairJob job = activeJobs.get(differencer.cfname);
      if (job == null) {
        assert terminated;
        return;
      }

      if (job.completedSynchronization(differencer)) {
        activeJobs.remove(differencer.cfname);
        String remaining =
            activeJobs.size() == 0
                ? ""
                : String.format(
                    " (%d remaining column family to sync for this session)", activeJobs.size());
        logger.info(
            String.format(
                "[repair #%s] %s is fully synced%s", getName(), differencer.cfname, remaining));
        if (activeJobs.isEmpty()) completed.signalAll();
      }
    }
 @Override
 public CFMetaData getCFMetaData(String keyspace, String cfName) {
   return knownCfs.get(cfName);
 }