storm学习(三)
标签: storm
spout方法调用顺序:1. declareOutputFields(调用一次) 2. open(调用一次) 3. active(调用一次) 4. nextTuple(循环调用) 5. deactive(手动调用)Bolt接口方法调用顺序:1....2. prepare(调用一次) ...
标签: storm
spout方法调用顺序:1. declareOutputFields(调用一次) 2. open(调用一次) 3. active(调用一次) 4. nextTuple(循环调用) 5. deactive(手动调用)Bolt接口方法调用顺序:1....2. prepare(调用一次) ...