private void setSessionAttributes(Map<String, Object> sessionAttributes) {
    getSessionManager().setAttribute(getClusterSessionAttributeName(), sessionAttributes);
  }
Set the map of session attributes for this cluster.
<p/>
This is a private method so that it may be used as a utility for add and update operations.

@param sessionAttributes the map of session attributes for this cluster; never null
ambari-server/src/main/java/org/apache/ambari/server/state/cluster/ClusterImpl.java