Package org.apache.storm.jdbc.bolt

Class JdbcInsertBolt

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.JdbcInsertBolt

All Implemented Interfaces:

Serializable, IBolt, IComponent, IRichBolt

public class JdbcInsertBolt
extends AbstractJdbcBolt

Basic bolt for writing to any Database table.

Note: Each JdbcInsertBolt defined in a topology is tied to a specific table.

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
JdbcInsertBolt(ConnectionProvider connectionProvider, JdbcMapper jdbcMapper)

Method Summary

Modifier and Type	Method	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 collector)	Subclasses should call this to ensure output collector and connection provider are set up, and finally jdbcClient is initialized properly.
protected void	process(Tuple tuple)	Process a single non-tick tuple of input.
JdbcInsertBolt	withInsertQuery(String insertQuery)
JdbcInsertBolt	withQueryTimeoutSecs(int queryTimeoutSecs)
JdbcInsertBolt	withTableName(String tableName)

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

cleanup

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

JdbcInsertBolt

public JdbcInsertBolt(ConnectionProvider connectionProvider,
 JdbcMapper jdbcMapper)

Method Details

withTableName

public JdbcInsertBolt withTableName(String tableName)

withInsertQuery

public JdbcInsertBolt withInsertQuery(String insertQuery)

withQueryTimeoutSecs

public JdbcInsertBolt withQueryTimeoutSecs(int queryTimeoutSecs)

prepare

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

Description copied from class: AbstractJdbcBolt

Subclasses should call this to ensure output collector and connection provider are set up, and finally jdbcClient is initialized properly.

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:

Specified by:

prepare in interface IBolt

Overrides:

prepare in class AbstractJdbcBolt

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.

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.

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