org.wso2.siddhi.extension.eventtable.rdbms

Class DBHandler

java.lang.Object

org.wso2.siddhi.extension.eventtable.rdbms.DBHandler

public class DBHandler
extends Object

Class which act as layer between the database and Siddhi. This class performs all the RDBMS related operations and Blooms Filter

Constructor Summary

Constructors

Constructor and Description
DBHandler(DataSource dataSource, String tableName, List<org.wso2.siddhi.query.api.definition.Attribute> attributeList, org.wso2.siddhi.query.api.definition.TableDefinition tableDefinition)

Method Summary

Modifier and Type	Method and Description
void	addEvent(org.wso2.siddhi.core.event.ComplexEventChunk addingEventChunk)
void	buildBloomFilters()
boolean	checkExistence(Object[] obj, ExecutionInfo executionInfo)
String	constructQuery(String tableName, String query, StringBuilder columnTypes, StringBuilder columns, StringBuilder values, StringBuilder column_values, StringBuilder condition) Replace attribute values with target build queries
void	deleteEvent(List<Object[]> eventList, ExecutionInfo executionInfo)
List<org.wso2.siddhi.query.api.definition.Attribute>	getAttributeList()
org.apache.hadoop.util.bloom.CountingBloomFilter[]	getBloomFilters()
Map<String,String>	getElementMappings()
ExecutionInfo	getExecutionInfoInstance()
String	getTableName()
boolean	isBloomFilterEnabled()
void	loadDBCache(CachingTable cachingTable, String cacheSizeInString)
void	overwriteOrAddEvent(List<Object[]> updateEventList, ExecutionInfo executionInfo)
org.wso2.siddhi.core.event.stream.StreamEvent	selectEvent(Object[] obj, ExecutionInfo executionInfo)
void	setBloomFilters(int bloomFilterSize, int bloomFilterHashFunction)
void	updateEvent(List<Object[]> updateEventList, ExecutionInfo executionInfo)

Methods inherited from class java.lang.Object

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

Constructor Detail

DBHandler

public DBHandler(DataSource dataSource,
                 String tableName,
                 List<org.wso2.siddhi.query.api.definition.Attribute> attributeList,
                 org.wso2.siddhi.query.api.definition.TableDefinition tableDefinition)

Method Detail

getExecutionInfoInstance

public ExecutionInfo getExecutionInfoInstance()

getElementMappings

public Map<String,String> getElementMappings()

getTableName

public String getTableName()

getAttributeList

public List<org.wso2.siddhi.query.api.definition.Attribute> getAttributeList()

isBloomFilterEnabled

public boolean isBloomFilterEnabled()

addEvent

public void addEvent(org.wso2.siddhi.core.event.ComplexEventChunk addingEventChunk)

deleteEvent

public void deleteEvent(List<Object[]> eventList,
                        ExecutionInfo executionInfo)

updateEvent

public void updateEvent(List<Object[]> updateEventList,
                        ExecutionInfo executionInfo)

overwriteOrAddEvent

public void overwriteOrAddEvent(List<Object[]> updateEventList,
                                ExecutionInfo executionInfo)

selectEvent

public org.wso2.siddhi.core.event.stream.StreamEvent selectEvent(Object[] obj,
                                                                 ExecutionInfo executionInfo)

checkExistence

public boolean checkExistence(Object[] obj,
                              ExecutionInfo executionInfo)

constructQuery

public String constructQuery(String tableName,
                             String query,
                             StringBuilder columnTypes,
                             StringBuilder columns,
                             StringBuilder values,
                             StringBuilder column_values,
                             StringBuilder condition)

Replace attribute values with target build queries

Parameters:

tableName - Table Name

query - query template

columnTypes - column types

columns - columns

values - values

column_values - column_values

condition - condition

Returns:

query as string

setBloomFilters

public void setBloomFilters(int bloomFilterSize,
                            int bloomFilterHashFunction)

buildBloomFilters

public void buildBloomFilters()

getBloomFilters

public org.apache.hadoop.util.bloom.CountingBloomFilter[] getBloomFilters()

loadDBCache

public void loadDBCache(CachingTable cachingTable,
                        String cacheSizeInString)