org.apache.storm.elasticsearch.bolt

Class AbstractEsBolt

java.lang.Object

org.apache.storm.topology.base.BaseComponent

org.apache.storm.topology.base.BaseRichBolt

org.apache.storm.topology.base.BaseTickTupleAwareRichBolt

org.apache.storm.elasticsearch.bolt.AbstractEsBolt

All Implemented Interfaces:

Serializable, IBolt, IComponent, IRichBolt

Direct Known Subclasses:

EsIndexBolt, EsLookupBolt, EsPercolateBolt

public abstract class AbstractEsBolt
extends BaseTickTupleAwareRichBolt

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected static org.elasticsearch.client.RestClient	client
protected OutputCollector	collector
protected static com.fasterxml.jackson.databind.ObjectMapper	objectMapper

Constructor Summary

Constructors

Constructor and Description
AbstractEsBolt(EsConfig esConfig)

Method Summary

Modifier and Type	Method and Description
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.

Methods inherited from class org.apache.storm.topology.base.BaseTickTupleAwareRichBolt

execute, onTickTuple, process

Methods inherited from class org.apache.storm.topology.base.BaseRichBolt

cleanup

Methods inherited from class org.apache.storm.topology.base.BaseComponent

getComponentConfiguration

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.storm.topology.IComponent

getComponentConfiguration

Field Detail

client

protected static org.elasticsearch.client.RestClient client

objectMapper

protected static final com.fasterxml.jackson.databind.ObjectMapper objectMapper

collector

protected OutputCollector collector

Constructor Detail

AbstractEsBolt

public AbstractEsBolt(EsConfig esConfig)

Method Detail

prepare

public void prepare(Map<String,Object> map,
                    TopologyContext topologyContext,
                    OutputCollector outputCollector)

Description copied from interface: 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:

Parameters:

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.

declareOutputFields

public void declareOutputFields(OutputFieldsDeclarer outputFieldsDeclarer)

Description copied from interface: IComponent

Declare the output schema for all the streams of this topology.

Parameters:

outputFieldsDeclarer - this is used to declare output stream ids, output fields, and whether or not each output stream is a direct stream