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From s influxdb <elastic....@gmail.com>
Subject curator pathcache
Date Wed, 09 Mar 2016 01:27:13 GMT
I am trying to run the path cahce and keep java NPE

Running curator 2.9.0 libraries against a zookeeper 3.4.6 cluster
Even

The samples are taken from the curator examples .



  public void run () throws Exception
       {
             try {

                pcache = new PathChildrenCache(client, PATH, true);
             pcache.start();

                addListener(cache);

           //    list(pcache);

               pcache.close();
            }
             finally {
                CloseableUtils.closeQuietly(cache);
             }
        }


      private static void addListener(PathChildrenCache cache)
      {
          // a PathChildrenCacheListener is optional. Here, it's used just
to log changes
          PathChildrenCacheListener listener = new
PathChildrenCacheListener()
          {
              @Override
              public void childEvent(CuratorFramework client,
PathChildrenCacheEvent event) throws Exception
              {
                  switch ( event.getType() )
                  {
                      case CHILD_ADDED:
                      {
                          System.out.println("Node added: " +
ZKPaths.getNodeFromPath(event.getData().getPath()));
                          break;
                      }

                      case CHILD_UPDATED:
                      {
                          System.out.println("Node changed: " +
ZKPaths.getNodeFromPath(event.getData().getPath()));
                          break;
                      }

                      case CHILD_REMOVED:
                      {
                          System.out.println("Node removed: " +
ZKPaths.getNodeFromPath(event.getData().getPath()));
                          break;
                      }
                  }
              }
          };
          cache.getListenable().addListener(listener);
      }


Here running a list returns empty size all the time

      private static void list(PathChildrenCache cache)
        {

            if ( cache.getCurrentData().size() == 0 )
            {
                System.out.println("* empty *");
            }
            else
            {
                for ( ChildData data : cache.getCurrentData() )
                {
                    System.out.println(data.getPath() + " = " + new
String(data.getData()));
                }
            }
        }

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