public void readyForEvents(ClientProxyMembershipID proxyId) {
    CacheClientProxy proxy = getClientProxy(proxyId);
    if (proxy != null) {
      // False signifies that a marker message has not already been processed.
      // Generate and send one.
      proxy.startOrResumeMessageDispatcher(false);
    }
  }
The client represented by the proxyId is ready to receive updates.
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/CacheClientNotifier.java