Example #1
0
  /**
   * Multicasts a GET_DIGEST_REQ to all current members and waits for all responses (GET_DIGEST_RSP)
   * or N ms.
   *
   * @return
   */
  private Digest fetchDigestsFromAllMembersInSubPartition(List<Address> current_mbrs) {
    if (current_mbrs == null) return null;

    GMS.GmsHeader hdr = new GMS.GmsHeader(GMS.GmsHeader.GET_DIGEST_REQ);
    Message get_digest_req = new Message();
    get_digest_req.setFlag(Message.OOB);
    get_digest_req.putHeader(gms.getId(), hdr);

    long max_wait_time = gms.merge_timeout > 0 ? gms.merge_timeout / 2 : 2000L;
    digest_collector.reset(current_mbrs);

    // add my own digest first
    Digest digest = (Digest) gms.getDownProtocol().down(Event.GET_DIGEST_EVT);
    digest_collector.add(gms.local_addr, digest);

    gms.getDownProtocol().down(new Event(Event.MSG, get_digest_req));
    digest_collector.waitForAllResponses(max_wait_time);
    if (log.isDebugEnabled()) {
      if (digest_collector.hasAllResponses())
        log.debug(gms.local_addr + ": fetched all digests for " + current_mbrs);
      else
        log.debug(
            gms.local_addr
                + ": fetched incomplete digests (after timeout of "
                + max_wait_time
                + ") ms for "
                + current_mbrs);
    }
    Map<Address, Digest> responses = new HashMap<Address, Digest>(digest_collector.getResults());
    MutableDigest retval = new MutableDigest(responses.size());
    for (Digest dig : responses.values()) {
      if (dig != null) retval.add(dig);
    }
    return retval;
  }
Example #2
0
  /**
   * Multicasts a GET_DIGEST_REQ to all current members and waits for all responses (GET_DIGEST_RSP)
   * or N ms.
   *
   * @return
   */
  private Digest fetchDigestsFromAllMembersInSubPartition(
      List<Address> current_mbrs, MergeId merge_id) {

    // Optimization: if we're the only member, we don't need to multicast the get-digest message
    if (current_mbrs == null
        || current_mbrs.size() == 1 && current_mbrs.get(0).equals(gms.local_addr))
      return (Digest) gms.getDownProtocol().down(new Event(Event.GET_DIGEST, gms.local_addr));

    GMS.GmsHeader hdr = new GMS.GmsHeader(GMS.GmsHeader.GET_DIGEST_REQ);
    hdr.merge_id = merge_id;
    Message get_digest_req =
        new Message().setFlag(Message.Flag.OOB, Message.Flag.INTERNAL).putHeader(gms.getId(), hdr);

    long max_wait_time =
        gms.merge_timeout / 2; // gms.merge_timeout is guaranteed to be > 0, verified in init()
    digest_collector.reset(current_mbrs);

    gms.getDownProtocol().down(new Event(Event.MSG, get_digest_req));

    // add my own digest first - the get_digest_req needs to be sent first *before* getting our own
    // digest, so
    // we have that message in our digest !
    Digest digest =
        (Digest) gms.getDownProtocol().down(new Event(Event.GET_DIGEST, gms.local_addr));
    digest_collector.add(gms.local_addr, digest);
    digest_collector.waitForAllResponses(max_wait_time);
    if (log.isTraceEnabled()) {
      if (digest_collector.hasAllResponses())
        log.trace(gms.local_addr + ": fetched all digests for " + current_mbrs);
      else
        log.trace(
            gms.local_addr
                + ": fetched incomplete digests (after timeout of "
                + max_wait_time
                + ") ms for "
                + current_mbrs);
    }
    Map<Address, Digest> responses = new HashMap<Address, Digest>(digest_collector.getResults());
    MutableDigest retval = new MutableDigest(responses.size());
    for (Digest dig : responses.values()) {
      if (dig != null) retval.add(dig);
    }
    return retval;
  }