this.componentid = topologyContext.getThisComponentId();
this.stormConf = TasksCommon.component_conf(stormConf, topologyContext,
componentid);
LOG.info("Loading task " + componentid + ":" + taskid);
this.zkCluster = new StormZkClusterState(clusterState);
// ��ȡtask_obj����,��ʵ���Ǹ���Component_id��ȡ���ε�SpoutSpec��bolt��StateSpoutSpec
this.taskObj = TasksCommon.get_task_object(
topologyContext.getRawTopology(), componentid);
// ����taskͳ�ƵĶ���-�μ�stats��