Examples of org.jgroups.util.Digest$Entry

org.jgroups.util.Digest
Class keeping track of the lowest and highest sequence numbers delivered, and the highest sequence numbers received, per member. This class is immutable

  }


  @Override
  protected void doDelete(HttpServletRequest req, HttpServletResponse resp)
      throws ServletException, IOException {
    Entry e = entry(req);
    S3Object remove = map.remove(e);
    if (remove == null) {
      resp.sendError(404, "Not found " + e);
    } else {
      resp.sendError(HttpURLConnection.HTTP_NO_CONTENT, "Deleted");

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    }


  }


  private Entry entry(HttpServletRequest req) {
    return new Entry(key(uri(req)));
  }

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        log("doGet " + uri);
    if ("/".equals(uri.getPath())) {
      list(req, resp);
    } else {
      String key = uri.getPath().substring(1);
      Entry e = new Entry(key);
      S3Object obj = map.get(e);
        if (debug)
          log("map.get(" + key + ") = " + obj);
      if (obj == null) {
        resp.sendError(404, "Not here: " + e);

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    if (maxKeysStr != null)
      maxKeys = Integer.parseInt(maxKeysStr);
    Writer w = new Writer();
    SortedMap<Entry, S3Object> submap = new TreeMap<Entry, S3Object>(map);
    if (prefix != null)
      submap = submap.tailMap(new Entry(prefix));
    int keyCount = 0;
    boolean truncated = false;
    String nextMarker = null;
    for (Entry e : submap.keySet()) {
      if (++keyCount > maxKeys) {

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    log("doPut " + uri);
    if ("/".equals(uri.getPath())) {
      log("create bucket");
      bucket = true;
    } else {
      Entry e = new Entry(key(uri));
      e.setLastModified(new Date());
      e.setSize(req.getContentLength());
      e.setOwner(new Owner("id", "name"));
      ByteArrayOutputStream os = new ByteArrayOutputStream();
      ServletInputStream is = req.getInputStream();
      byte b[] = new byte[128];
      while (true) {
        int len = is.read(b);

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                                                                             bind_addr, bind_port));
            Thread t = getThreadFactory().newThread(spawner, "STREAMING_STATE_TRANSFER server socket acceptor");
            t.start();
        }


        Digest digest = isDigestNeeded() ? (Digest) down_prot.down(Event.GET_DIGEST_EVT) : null;


        Message state_rsp = new Message(stateRequester);
        StateHeader hdr = new StateHeader(StateHeader.STATE_RSP, local_addr, use_default_transport
                ? null
                : spawner.getServerSocketAddress(), digest, id);

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                down_prot.down(new Event(Event.OPEN_BARRIER));
        }
    }


    void handleStateRsp(final StateHeader hdr) {
        Digest tmp_digest = hdr.my_digest;
        if (isDigestNeeded()) {
            if (tmp_digest == null) {
                if (log.isWarnEnabled())
                    log.warn("digest received from " + hdr.sender
                            + " is null, skipping setting digest !");

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    }






    void becomeSingletonMember(Address mbr) {
        Digest initial_digest;
        ViewId view_id;
        Vector<Address> mbrs=new Vector<Address>(1);


        // set the initial digest (since I'm the first member)
        initial_digest=new Digest(gms.local_addr, 0, 0); // initial seqno mcast by me will be 1 (highest seen +1)
        gms.setDigest(initial_digest);


        view_id=new ViewId(mbr);       // create singleton view with mbr as only member
        mbrs.addElement(mbr);

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            // Example: {A}, B joins, after returning JoinRsp to B, A garbage collects messages higher than those
            // in the digest returned to the client, so the client will *not* be able to ask for retransmission
            // of those messages if he misses them            
            if(hasJoiningMembers) {
                gms.getDownProtocol().down(new Event(Event.SUSPEND_STABLE, MAX_SUSPEND_TIMEOUT));
                Digest tmp=gms.getDigest(); // get existing digest
                MutableDigest join_digest=null;
                if(tmp == null){
                    log.error("received null digest from GET_DIGEST: will cause JOIN to fail");
                }
                else {
                    // create a new digest, which contains the new member
                    join_digest=new MutableDigest(tmp.size() + new_mbrs.size());
                    join_digest.add(tmp); // add the existing digest to the new one
                    for(Address member:new_mbrs)
                        join_digest.add(member, 0, 0); // ... and add the new members. their first seqno will be 1
                }
                join_rsp=new JoinRsp(new_view, join_digest != null? join_digest.copy() : null);

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    private static String dumpDigests(JChannel ... channels) {
        StringBuilder sb=new StringBuilder();
        for(JChannel ch: channels) {
            sb.append(ch.getAddress()).append(": ");
            NAKACK nakack=(NAKACK)ch.getProtocolStack().findProtocol(NAKACK.class);
            Digest digest=nakack.getDigest();
            sb.append(digest).append("\n");
        }
        return sb.toString();
    }

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