@Deprecated public class DruidBeamBolt<E> extends BaseTickTupleAwareRichBolt
Basic bolt implementation for storing data to Druid datastore.
This implementation uses Druid’s Tranquility library (https://github.com/druid-io/tranquility) to send to druid store. Some of the concepts are borrowed from Tranquility storm connector implementation. (https://github.com/druid-io/tranquility/blob/master/docs/storm.md)By default this Bolt expects to receive tuples in which “event” field gives your event type. This logic can be changed by implementing ITupleDruidEventMapper interface.
| Constructor and Description |
|---|
DruidBeamBolt(DruidBeamFactory<E> beamFactory,
ITupleDruidEventMapper<E> druidEventMapper,
DruidConfig.Builder druidConfigBuilder)
Deprecated.
|
| Modifier and Type | Method and Description |
|---|---|
void |
cleanup()
Deprecated.
Called when an IBolt is going to be shutdown.
|
void |
declareOutputFields(OutputFieldsDeclarer declarer)
Deprecated.
Declare the output schema for all the streams of this topology.
|
void |
prepare(Map stormConf,
TopologyContext context,
OutputCollector collector)
Deprecated.
Called when a task for this component is initialized within a worker on the cluster.
|
protected void |
process(Tuple tuple)
Deprecated.
Process a single non-tick tuple of input.
|
execute, onTickTuplegetComponentConfigurationclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitgetComponentConfigurationpublic DruidBeamBolt(DruidBeamFactory<E> beamFactory, ITupleDruidEventMapper<E> druidEventMapper, DruidConfig.Builder druidConfigBuilder)
public void prepare(Map stormConf, TopologyContext context, OutputCollector collector)
IBoltCalled when a task for this component is initialized within a worker on the cluster. It provides the bolt with the environment in which the bolt executes.
This includes the:
stormConf - The Storm configuration for this bolt. This is the configuration provided to the topology merged in with cluster configuration on this machine.context - This object can be used to get information about this task’s place within the topology, including the task id and component id of this task, input and output information, etc.collector - The collector is used to emit tuples from this bolt. Tuples can be emitted at any time, including the prepare and cleanup methods. The collector is thread-safe and should be saved as an instance variable of this bolt object.protected void process(Tuple tuple)
BaseTickTupleAwareRichBoltProcess a single non-tick tuple of input. Implementation needs to handle ack manually. More details on IBolt.execute(Tuple).
process in class BaseTickTupleAwareRichBolttuple - The input tuple to be processed.public void cleanup()
IBoltCalled when an IBolt is going to be shutdown. There is no guarentee that cleanup will be called, because the supervisor kill -9’s worker processes on the cluster.
The one context where cleanup is guaranteed to be called is when a topology is killed when running Storm in local mode.
cleanup in interface IBoltcleanup in class BaseRichBoltpublic void declareOutputFields(OutputFieldsDeclarer declarer)
IComponentDeclare the output schema for all the streams of this topology.
declarer - this is used to declare output stream ids, output fields, and whether or not each output stream is a direct streamCopyright © 2019 The Apache Software Foundation. All Rights Reserved.