Package org.wso2.siddhi.parser.core.appcreator

Class AbstractSiddhiAppCreator

java.lang.Object

org.wso2.siddhi.parser.core.appcreator.AbstractSiddhiAppCreator

All Implemented Interfaces:

SiddhiAppCreator

Direct Known Subclasses:

NatsSiddhiAppCreator

public abstract class AbstractSiddhiAppCreator
extends Object
implements SiddhiAppCreator

Abstract implementation of SiddhiAppCreator. Developers can use this extension point to implement custom Siddhi App Creator based on the distribute implementation.

Constructor Summary

Constructors

Constructor	Description
AbstractSiddhiAppCreator()

Method Summary

Modifier and Type	Method	Description
protected abstract List<SiddhiQuery>	createApps(String siddhiAppName, SiddhiQueryGroup queryGroup, MessagingSystem messagingSystem)	This method should return valid concrete Siddhi App/s as Strings.
List<DeployableSiddhiQueryGroup>	createApps(SiddhiTopology topology, MessagingSystem messagingSystem)	Create valid concrete Siddhi Apps for each Query Group in the given SiddhiTopology.
protected List<SiddhiQuery>	generateQueryList(String queryTemplate, String queryGroupName, int parallelism)
protected List<Integer>	getPartitionNumbers(int appParallelism, int availablePartitionCount, int currentAppNum)
protected String	getTopicName(String siddhiAppName, String streamName, String groupingField)
protected String	getUpdatedQuery(String query, Map<String,String> valuesMap)
protected void	updateQueryList(List<SiddhiQuery> queryList, Map<String,String> valuesMap)

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractSiddhiAppCreator

public AbstractSiddhiAppCreator()

Method Detail

createApps

public List<DeployableSiddhiQueryGroup> createApps(SiddhiTopology topology,
                                                   MessagingSystem messagingSystem)

Description copied from interface: SiddhiAppCreator

Create valid concrete Siddhi Apps for each Query Group in the given SiddhiTopology.

Specified by:

createApps in interface SiddhiAppCreator

Parameters:

topology - Input topology to create Siddhi Apps

Returns:

List of DeployableSiddhiQueryGroups. Length of the list should be equal to no. of groups user has defined. Length of the list should be greater than zero always.

createApps

protected abstract List<SiddhiQuery> createApps(String siddhiAppName,
                                                SiddhiQueryGroup queryGroup,
                                                MessagingSystem messagingSystem)

This method should return valid concrete Siddhi App/s as Strings. No. of returned Siddhi Apps should equal the parallelism count for parse group.

Parameters:

queryGroup - Input parse group to produce Siddhi Apps.

Returns:

List of valid concrete Siddhi Apps as String.

getPartitionNumbers

protected List<Integer> getPartitionNumbers(int appParallelism,
                                            int availablePartitionCount,
                                            int currentAppNum)

generateQueryList

protected List<SiddhiQuery> generateQueryList(String queryTemplate,
                                              String queryGroupName,
                                              int parallelism)

updateQueryList

protected void updateQueryList(List<SiddhiQuery> queryList,
                               Map<String,String> valuesMap)

getUpdatedQuery

protected String getUpdatedQuery(String query,
                                 Map<String,String> valuesMap)

getTopicName

protected String getTopicName(String siddhiAppName,
                              String streamName,
                              String groupingField)

Parameters:

siddhiAppName - Name of the userdefined siddhi app

streamName - Currently processing stream name

groupingField - Partition key field, if available otherwise null

Returns:

created topic name Creates the topic name from above parameters