Examples of org.nasutekds.server.replication.protocol.TopologyMsg

Package org.nasutekds.server.replication.protocol

Examples of org.nasutekds.server.replication.protocol.TopologyMsg

org.nasutekds.server.replication.protocol.TopologyMsg
This class defines a message that is sent: - By a RS to the other RSs in the topology, containing: - the list of DSs directly connected to the RS in the DS list - only this RS in the RS list - By a RS to his connected DSs, containing every DSs and RSs he knows. In that case the message contains: - the list of every DS the RS knows except the destinator DS in the DS list - the list of every connected RSs (including the sending RS) in the RS list Exchanging these messages allows to have each RS or DS take appropriate decisions according to the current topology: - a RS can route a message to a DS - a DS can decide towards which peer DS send referrals ...

        {
          WindowMsg windowMsg = (WindowMsg) msg;
          sendWindow.release(windowMsg.getNumAck());
        } else if (msg instanceof TopologyMsg)
        {
          TopologyMsg topoMsg = (TopologyMsg) msg;
          receiveTopo(topoMsg);
          if (reconnectToTheBestRS)
          {
            // Reset wait time before next computation of best server
            mustRunBestServerCheckingAlgorithm = 0;

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            replicationServerInfo.getServerState(),
            replicationServerInfo.getDegradedStatusThreshold(),
            this.getGenerationID());


          // Perform session start (handshake phase 2)
          TopologyMsg topologyMsg = performPhaseTwoHandshake(
            replicationServerInfo.getServerURL(), initStatus);


          if (topologyMsg != null) // Handshake phase 2 exchange went well
          {
            try
            {
              /*
               * If we just connected to a RS with a different group id than us
               * (because for instance a RS with our group id was unreachable
               * while connecting to each RS) but the just received TopologyMsg
               * shows that in the same time a RS with our group id connected,
               * we must give up the connection to force reconnection that will
               * certainly go back to a server with our group id as server with
               * our group id have a greater priority for connection (in
               * computeBestReplicationServer). In other words, we disconnect to
               * connect to a server with our group id. If a server with our
               * group id comes back later in the topology, we will be advised
               * upon reception of a new TopologyMsg message and we will force
               * reconnection at that time to retrieve a server with our group
               * id.
               */
              byte tmpRsGroupId = replicationServerInfo.getGroupId();
              boolean someServersWithSameGroupId =
                hasSomeServerWithSameGroupId(topologyMsg.getRsList());


              // Really no other server with our group id ?
              if ((tmpRsGroupId == groupId) ||
                ((tmpRsGroupId != groupId) && !someServersWithSameGroupId))
              {

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   * @return The ReplServerStartMsg the server replied. Null if could not
   *         get an answer.
   */
  private TopologyMsg performECLPhaseTwoHandshake(String server)
  {
    TopologyMsg topologyMsg = null;


    try
    {
      // Send our Start Session
      StartECLSessionMsg startECLSessionMsg = null;

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   *         get an answer.
   */
  private TopologyMsg performPhaseTwoHandshake(String server,
    ServerStatus initStatus)
  {
    TopologyMsg topologyMsg = null;


    try
    {
      /*
       * Send our StartSessionMsg.
       */
      StartSessionMsg startSessionMsg = null;
      // May have created a broker with null replication domain for
      // unit test purpose.
      if (domain != null)
      {
        startSessionMsg =
          new StartSessionMsg(
          initStatus,
          domain.getRefUrls(),
          domain.isAssured(),
          domain.getAssuredMode(),
          domain.getAssuredSdLevel());
        startSessionMsg.setEclIncludes(
          domain.getEclInclude(domain.getServerId()));
      } else
      {
        startSessionMsg =
          new StartSessionMsg(initStatus, new ArrayList<String>());
      }
      session.publish(startSessionMsg);


      /*
       * Read the TopologyMsg that should come back.
       */
      topologyMsg = (TopologyMsg) session.receive();


      if (debugEnabled())
      {
        debugInfo("In RB for " + baseDn +
          "\nRB HANDSHAKE SENT:\n" + startSessionMsg.toString() +
          "\nAND RECEIVED:\n" + topologyMsg.toString());
      }


      // Alright set the timeout to the desired value
      session.setSoTimeout(timeout);

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Related Classes of org.nasutekds.server.replication.protocol.TopologyMsg

org.nasutekds.server.replication.common.AssuredMode

org.nasutekds.server.replication.common.DSInfo

org.nasutekds.server.replication.common.RSInfo

org.nasutekds.server.replication.common.ServerStatus

org.nasutekds.server.replication.plugin.AssuredReplicationPluginTest$FakeReplicationServer

org.nasutekds.server.replication.server.AssuredReplicationServerTest$FakeReplicationServer

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