예제 #1
0
    public void onUp(Host host) {
      HostConnectionPool previous = addHost(host);
      ;
      loadBalancer.onUp(host);

      // This should not be necessary but it's harmless
      if (previous != null) previous.shutdown();
    }
예제 #2
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    public void onAdd(Host host) {
      HostConnectionPool previous = addHost(host);
      ;
      loadBalancer.onAdd(host);

      // This should not be necessary, especially since the host is
      // supposed to be new, but it's safer to make that work correctly
      // if the even is triggered multiple times.
      if (previous != null) previous.shutdown();
    }
예제 #3
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    public void onDown(Host host) {
      loadBalancer.onDown(host);
      HostConnectionPool pool = pools.remove(host);

      // This should not be necessary but it's harmless
      if (pool != null) pool.shutdown();

      // If we've remove a host, the loadBalancer is allowed to change his mind on host distances.
      for (Host h : cluster.getMetadata().allHosts()) {
        if (!h.getMonitor().isUp()) continue;

        HostDistance dist = loadBalancer.distance(h);
        if (dist != HostDistance.IGNORED) {
          HostConnectionPool p = pools.get(h);
          if (p == null) addHost(host);
          else p.hostDistance = dist;
        }
      }
    }
예제 #4
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 private HostConnectionPool addHost(Host host) {
   try {
     HostDistance distance = loadBalancer.distance(host);
     if (distance == HostDistance.IGNORED) {
       return pools.get(host);
     } else {
       logger.debug("Adding {} to list of queried hosts", host);
       return pools.put(host, new HostConnectionPool(host, distance, this));
     }
   } catch (AuthenticationException e) {
     logger.error("Error creating pool to {} ({})", host, e.getMessage());
     host.getMonitor()
         .signalConnectionFailure(new ConnectionException(e.getHost(), e.getMessage()));
     return pools.get(host);
   } catch (ConnectionException e) {
     logger.debug("Error creating pool to {} ({})", host, e.getMessage());
     host.getMonitor().signalConnectionFailure(e);
     return pools.get(host);
   }
 }
예제 #5
0
 public void onRemove(Host host) {
   loadBalancer.onRemove(host);
   HostConnectionPool pool = pools.remove(host);
   if (pool != null) pool.shutdown();
 }