Package org.apache.storm.jdbc.bolt

Class JdbcLookupBolt

java.lang.Object

org.apache.storm.topology.base.BaseComponent

org.apache.storm.topology.base.BaseRichBolt

org.apache.storm.topology.base.BaseTickTupleAwareRichBolt

org.apache.storm.jdbc.bolt.AbstractJdbcBolt

org.apache.storm.jdbc.bolt.JdbcLookupBolt

All Implemented Interfaces:

Serializable, IBolt, IComponent, IRichBolt

public class JdbcLookupBolt
extends AbstractJdbcBolt

Basic bolt for querying from any database.

See Also:

• Serialized Form

Field Summary

Fields inherited from class org.apache.storm.jdbc.bolt.AbstractJdbcBolt

collector, configKey, connectionProvider, jdbcClient, queryTimeoutSecs

Constructor Summary

Constructors

Constructor	Description
JdbcLookupBolt(ConnectionProvider connectionProvider, String selectQuery, JdbcLookupMapper jdbcLookupMapper)

Method Summary

Modifier and Type	Method	Description
void	declareOutputFields(OutputFieldsDeclarer outputFieldsDeclarer)	Declare the output schema for all the streams of this topology.
protected void	process(Tuple tuple)	Process a single non-tick tuple of input.
JdbcLookupBolt	withQueryTimeoutSecs(int queryTimeoutSecs)

Methods inherited from class org.apache.storm.jdbc.bolt.AbstractJdbcBolt

cleanup, prepare

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

execute, onTickTuple

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

Constructor Details

JdbcLookupBolt

public JdbcLookupBolt(ConnectionProvider connectionProvider,
 String selectQuery,
 JdbcLookupMapper jdbcLookupMapper)

Method Details

withQueryTimeoutSecs

public JdbcLookupBolt withQueryTimeoutSecs(int queryTimeoutSecs)

process

protected void process(Tuple tuple)

Description copied from class: BaseTickTupleAwareRichBolt

Process a single non-tick tuple of input. Implementation needs to handle ack manually. More details on IBolt.execute(Tuple).

Specified by:

process in class BaseTickTupleAwareRichBolt

Parameters:

tuple - The input tuple to be processed.

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