Package io.siddhi.core.query.processor.stream.window

Class TableWindowProcessor

java.lang.Object

io.siddhi.core.query.processor.stream.AbstractStreamProcessor<S>

io.siddhi.core.query.processor.stream.window.WindowProcessor<S>

io.siddhi.core.query.processor.stream.window.BatchingWindowProcessor

io.siddhi.core.query.processor.stream.window.TableWindowProcessor

All Implemented Interfaces:

Processor, FindableProcessor, QueryableProcessor, ExternalReferencedHolder

public class TableWindowProcessor
extends BatchingWindowProcessor
implements QueryableProcessor

Implementation of WindowProcessor which represent a Window operating based on Table.

Field Summary

Fields inherited from class io.siddhi.core.query.processor.stream.AbstractStreamProcessor

attributeExpressionExecutors, attributeExpressionLength, complexEventPopulater, inputDefinition, metaStreamEvent, nextProcessor, siddhiQueryContext, stateHolder, streamEventClonerHolder

Constructor Summary

Constructors

Constructor	Description
TableWindowProcessor(Table table)

Method Summary

Modifier and Type	Method	Description
CompiledCondition	compileCondition(io.siddhi.query.api.expression.Expression condition, MatchingMetaInfoHolder matchingMetaInfoHolder, List<VariableExpressionExecutor> variableExpressionExecutors, Map<String,Table> tableMap, SiddhiQueryContext siddhiQueryContext)	To construct a finder having the capability of finding events at the processor that corresponds to the incoming matchingEvent and the given matching expression logic.
CompiledSelection	compileSelection(io.siddhi.query.api.execution.query.selection.Selector selector, List<io.siddhi.query.api.definition.Attribute> expectedOutputAttributes, MatchingMetaInfoHolder matchingMetaInfoHolder, List<VariableExpressionExecutor> variableExpressionExecutors, Map<String,Table> tableMap, SiddhiQueryContext siddhiQueryContext)	To construct a selection having the capability of transforming events based on given selection logic.
StreamEvent	find(StateEvent matchingEvent, CompiledCondition compiledCondition)	To find events from the processor event pool, that the matches the matchingEvent based on finder logic.
Table	getTable()
String	getTableId()
protected StateFactory	init(ExpressionExecutor[] attributeExpressionExecutors, ConfigReader configReader, StreamEventClonerHolder streamEventClonerHolder, boolean outputExpectsExpiredEvents, boolean findToBeExecuted, SiddhiQueryContext siddhiQueryContext)	The init method of the WindowProcessor, this method will be called before other methods
boolean	isOptimisableLookup()
protected void	process(ComplexEventChunk streamEventChunk, Processor nextProcessor, StreamEventCloner streamEventCloner, State state)	The main processing method that will be called upon event arrival
StreamEvent	query(StateEvent matchingEvent, CompiledCondition compiledCondition, CompiledSelection compiledSelection)	To find events from the processor event pool, that the matches the matchingEvent based on finder logic and return them based on the defined selection.
StreamEvent	query(StateEvent matchingEvent, CompiledCondition compiledCondition, CompiledSelection compiledSelection, io.siddhi.query.api.definition.Attribute[] outputAttributes)	To find events from the processor event pool, that the matches the matchingEvent based on finder logic and return them based on the defined selection.
void	start()	This will be called only once and this can be used to acquire required resources for the processing element.
void	stop()	This will be called only once and this can be used to release the acquired resources for processing.

Methods inherited from class io.siddhi.core.query.processor.stream.window.BatchingWindowProcessor

getProcessingMode, init, processEventChunk

Methods inherited from class io.siddhi.core.query.processor.stream.window.WindowProcessor

getReturnAttributes

Methods inherited from class io.siddhi.core.query.processor.stream.AbstractStreamProcessor

constructStreamEventPopulater, getNextProcessor, initProcessor, isStateful, process, process, setNextProcessor, setStreamEventCloner, setToLast

Methods inherited from class java.lang.Object

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

Constructor Detail

TableWindowProcessor

public TableWindowProcessor(Table table)

Method Detail

isOptimisableLookup

public boolean isOptimisableLookup()

init

protected StateFactory init(ExpressionExecutor[] attributeExpressionExecutors,
                            ConfigReader configReader,
                            StreamEventClonerHolder streamEventClonerHolder,
                            boolean outputExpectsExpiredEvents,
                            boolean findToBeExecuted,
                            SiddhiQueryContext siddhiQueryContext)

Description copied from class: BatchingWindowProcessor

The init method of the WindowProcessor, this method will be called before other methods

Specified by:

init in class BatchingWindowProcessor

Parameters:

attributeExpressionExecutors - the executors of each function parameters

configReader - the config reader of window

streamEventClonerHolder - stream event cloner holder

outputExpectsExpiredEvents - is expired events sent as output

findToBeExecuted - find operation will be performed

siddhiQueryContext - the context of the siddhi query

process

protected void process(ComplexEventChunk streamEventChunk,
                       Processor nextProcessor,
                       StreamEventCloner streamEventCloner,
                       State state)

Description copied from class: BatchingWindowProcessor

The main processing method that will be called upon event arrival

Specified by:

process in class BatchingWindowProcessor

Parameters:

streamEventChunk - the stream event chunk that need to be processed

nextProcessor - the next processor to which the success events need to be passed

streamEventCloner - helps to clone the incoming event for local storage or modification

state - current state of the processor

find

public StreamEvent find(StateEvent matchingEvent,
                        CompiledCondition compiledCondition)

Description copied from interface: FindableProcessor

To find events from the processor event pool, that the matches the matchingEvent based on finder logic.

Specified by:

find in interface FindableProcessor

Parameters:

matchingEvent - the event to be matched with the events at the processor

compiledCondition - the execution element responsible for matching the corresponding events that matches the matchingEvent based on pool of events at Processor

Returns:

the matched events

compileCondition

public CompiledCondition compileCondition(io.siddhi.query.api.expression.Expression condition,
                                          MatchingMetaInfoHolder matchingMetaInfoHolder,
                                          List<VariableExpressionExecutor> variableExpressionExecutors,
                                          Map<String,Table> tableMap,
                                          SiddhiQueryContext siddhiQueryContext)

Description copied from interface: FindableProcessor

To construct a finder having the capability of finding events at the processor that corresponds to the incoming matchingEvent and the given matching expression logic.

Specified by:

compileCondition in interface FindableProcessor

Parameters:

condition - the matching condition

matchingMetaInfoHolder - the meta structure of the incoming matchingEvent

variableExpressionExecutors - the list of variable ExpressionExecutors already created

tableMap - map of event tables

siddhiQueryContext - current siddhi query context

Returns:

compiled Condition having the capability of matching events against the incoming matchingEvent

start

public void start()

Description copied from interface: ExternalReferencedHolder

This will be called only once and this can be used to acquire required resources for the processing element. This will be called after initializing the system and before starting to process the events.

Specified by:

start in interface ExternalReferencedHolder

stop

public void stop()

Description copied from interface: ExternalReferencedHolder

This will be called only once and this can be used to release the acquired resources for processing. This will be called before shutting down the system.

Specified by:

stop in interface ExternalReferencedHolder

query

public StreamEvent query(StateEvent matchingEvent,
                         CompiledCondition compiledCondition,
                         CompiledSelection compiledSelection,
                         io.siddhi.query.api.definition.Attribute[] outputAttributes)
                  throws ConnectionUnavailableException

Description copied from interface: QueryableProcessor

To find events from the processor event pool, that the matches the matchingEvent based on finder logic and return them based on the defined selection.

Specified by:

query in interface QueryableProcessor

Parameters:

matchingEvent - the event to be matched with the events at the processor

compiledCondition - the execution element responsible for matching the corresponding events that matches the matchingEvent based on pool of events at Processor

compiledSelection - the execution element responsible for transforming the corresponding events to the given selection

outputAttributes - the output attributes specified in the query.

Returns:

the matched events

Throws:

ConnectionUnavailableException

query

public StreamEvent query(StateEvent matchingEvent,
                         CompiledCondition compiledCondition,
                         CompiledSelection compiledSelection)
                  throws ConnectionUnavailableException

Description copied from interface: QueryableProcessor

To find events from the processor event pool, that the matches the matchingEvent based on finder logic and return them based on the defined selection.

Specified by:

query in interface QueryableProcessor

Parameters:

matchingEvent - the event to be matched with the events at the processor

compiledCondition - the execution element responsible for matching the corresponding events that matches the matchingEvent based on pool of events at Processor

compiledSelection - the execution element responsible for transforming the corresponding events to the given selection

Returns:

the matched events

Throws:

ConnectionUnavailableException

compileSelection

public CompiledSelection compileSelection(io.siddhi.query.api.execution.query.selection.Selector selector,
                                          List<io.siddhi.query.api.definition.Attribute> expectedOutputAttributes,
                                          MatchingMetaInfoHolder matchingMetaInfoHolder,
                                          List<VariableExpressionExecutor> variableExpressionExecutors,
                                          Map<String,Table> tableMap,
                                          SiddhiQueryContext siddhiQueryContext)

Description copied from interface: QueryableProcessor

To construct a selection having the capability of transforming events based on given selection logic.

Specified by:

compileSelection in interface QueryableProcessor

Parameters:

selector - the query selector

matchingMetaInfoHolder - the meta structure of the incoming matchingEvent

variableExpressionExecutors - the list of variable ExpressionExecutors already created

tableMap - map of event tables

siddhiQueryContext - current siddhi query context

Returns:

compiled Selection having the capability of transforming events based on the selection

getTable

public Table getTable()

getTableId

public String getTableId()