public void enter(Thread threadId,MetricReference metricReference){
  HashMap<MetricReference,Object> attribs=getAttributes(threadId);
  attribs.put(metricReference,System.currentTimeMillis());
}

public void enter ( Thread threadId , MetricReference metricReference ) { HashMap < MetricReference , Object > attribs = getAttributes ( threadId ) ; attribs . put ( metricReference , System . currentTimeMillis ( ) ) ; }
enter a traced zone by the name of metricreference for the specified thread . this puts the enter timestamp and all lost call calculations will be based on this timestamp .
