public abstract class AbstractEsBolt extends BaseTickTupleAwareRichBolt
Modifier and Type | Field and Description |
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protected static org.elasticsearch.client.RestClient |
client |
protected OutputCollector |
collector |
protected static com.fasterxml.jackson.databind.ObjectMapper |
objectMapper |
Constructor and Description |
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AbstractEsBolt(EsConfig esConfig) |
Modifier and Type | Method and Description |
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void |
declareOutputFields(OutputFieldsDeclarer outputFieldsDeclarer)
Declare the output schema for all the streams of this topology.
|
void |
prepare(Map<String,Object> map,
TopologyContext topologyContext,
OutputCollector outputCollector)
Called when a task for this component is initialized within a worker on the cluster.
|
execute, onTickTuple, process
cleanup
getComponentConfiguration
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
getComponentConfiguration
protected static org.elasticsearch.client.RestClient client
protected static final com.fasterxml.jackson.databind.ObjectMapper objectMapper
protected OutputCollector collector
public AbstractEsBolt(EsConfig esConfig)
public void prepare(Map<String,Object> map, TopologyContext topologyContext, OutputCollector outputCollector)
IBolt
Called 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:
map
- The Storm configuration for this bolt. This is the configuration provided to the topology merged in with cluster configuration on this machine.topologyContext
- 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.outputCollector
- 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.public void declareOutputFields(OutputFieldsDeclarer outputFieldsDeclarer)
IComponent
Declare the output schema for all the streams of this topology.
outputFieldsDeclarer
- this is used to declare output stream ids, output fields, and whether or not each output stream is a direct streamCopyright © 2022 The Apache Software Foundation. All rights reserved.