Example #1
0
  /** Sends a GET_MBR_REQ to *all* GossipRouters, merges responses. */
  private List _getMembers(String group) {
    List ret = new LinkedList();
    Socket sock = null;
    SocketAddress destAddr;
    DataOutputStream out = null;
    DataInputStream in = null;
    IpAddress entry;
    GossipData gossip_req, gossip_rsp;
    Address mbr;

    for (int i = 0; i < gossip_servers.size(); i++) {
      entry = (IpAddress) gossip_servers.elementAt(i);
      if (entry.getIpAddress() == null || entry.getPort() == 0) {
        if (log.isErrorEnabled()) log.error("entry.host or entry.port is null");
        continue;
      }

      try {
        // sock=new Socket(entry.getIpAddress(), entry.getPort());
        sock = new Socket();
        destAddr = new InetSocketAddress(entry.getIpAddress(), entry.getPort());
        sock.connect(destAddr, SOCKET_TIMEOUT);
        out = new DataOutputStream(sock.getOutputStream());

        gossip_req = new GossipData(GossipRouter.GOSSIP_GET, group, null, null);
        // must send GossipData as fast as possible, otherwise the
        // request might be rejected
        gossip_req.writeTo(out);
        out.flush();

        in = new DataInputStream(sock.getInputStream());
        gossip_rsp = new GossipData();
        gossip_rsp.readFrom(in);
        if (gossip_rsp.mbrs != null) { // merge with ret
          for (Iterator it = gossip_rsp.mbrs.iterator(); it.hasNext(); ) {
            mbr = (Address) it.next();
            if (!ret.contains(mbr)) ret.add(mbr);
          }
        }
      } catch (Exception ex) {
        if (log.isErrorEnabled()) log.error("exception connecting to host " + entry);
      } finally {
        Util.close(out);
        Util.close(in);
        if (sock != null) {
          try {
            sock.close();
          } catch (IOException e) {
          }
        }
      }
    }

    return ret;
  }
Example #2
0
  void _unregister(String group, Address mbr) {
    Socket sock = null;
    DataOutputStream out = null;
    IpAddress entry;
    GossipData gossip_req;

    for (int i = 0; i < gossip_servers.size(); i++) {
      entry = (IpAddress) gossip_servers.elementAt(i);
      if (entry.getIpAddress() == null || entry.getPort() == 0) {
        if (log.isErrorEnabled()) log.error("entry.host or entry.port is null");
        continue;
      }
      try {
        if (log.isTraceEnabled())
          log.trace(
              "UNREGISTER("
                  + group
                  + ", "
                  + mbr
                  + ") with GossipRouter at "
                  + entry.getIpAddress()
                  + ':'
                  + entry.getPort());
        sock = new Socket(entry.getIpAddress(), entry.getPort());
        out = new DataOutputStream(sock.getOutputStream());
        gossip_req = new GossipData(GossipRouter.UNREGISTER, group, mbr, null);
        // must send GossipData as fast as possible, otherwise the
        // request might be rejected
        gossip_req.writeTo(out);
        out.flush();
      } catch (Exception ex) {
        if (log.isErrorEnabled()) log.error("exception connecting to host " + entry);
      } finally {
        Util.close(out);
        if (sock != null) {
          try {
            sock.close();
          } catch (IOException e) {
          }
        }
      }
    }
  }