public abstract class BaseTickTupleAwareRichBolt extends BaseRichBolt
This class is based on BaseRichBolt, but is aware of tick tuple.
|Constructor and Description|
|Modifier and Type||Method and Description|
Process a single tuple of input.
Process a single tick tuple of input.
Process a single non-tick tuple of input.
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
public void execute(Tuple tuple)
Process a single tuple of input. The Tuple object contains metadata on it about which component/stream/task it came from. The values of the Tuple can be accessed using Tuple#getValue. The IBolt does not have to process the Tuple immediately. It is perfectly fine to hang onto a tuple and process it later (for instance, to do an aggregation or join).
Tuples should be emitted using the OutputCollector provided through the prepare method. It is required that all input tuples are acked or failed at some point using the OutputCollector. Otherwise, Storm will be unable to determine when tuples coming off the spouts have been completed.
For the common case of acking an input tuple at the end of the execute method, see IBasicBolt which automates this.
tuple- the tuple to process.
protected void onTickTuple(Tuple tuple)
Process a single tick tuple of input. Tick tuple doesn’t need to be acked. It provides default “DO NOTHING” implementation for convenient. Override this method if needed.
More details on
tuple- The input tuple to be processed.
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