io.siddhi.core.window

Class Window

java.lang.Object

io.siddhi.core.window.Window

All Implemented Interfaces:

FindableProcessor, MemoryCalculable

public class Window
extends Object
implements FindableProcessor, MemoryCalculable

Window implementation of SiddhiQL. It can be seen as a global Window which can be accessed from multiple queries.

Constructor Summary

Constructors

Constructor and Description
Window(io.siddhi.query.api.definition.WindowDefinition windowDefinition, SiddhiAppContext siddhiAppContext) Construct a Window object.

Method Summary

Modifier and Type	Method and Description
void	add(ComplexEventChunk complexEventChunk) Add the given ComplexEventChunk to the Window.
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.
StreamEvent	find(StateEvent matchingEvent, CompiledCondition compiledCondition) To find events from the processor event pool, that the matches the matchingEvent based on finder logic.
LockWrapper	getLock()
ProcessingMode	getProcessingMode()
io.siddhi.query.api.definition.WindowDefinition	getWindowDefinition() Return the WindowDefinition used to construct this Window.
void	init(Map<String,Table> tableMap, Map<String,Window> eventWindowMap, String windowName, boolean findToBeExecuted) Initialize the WindowEvent table by creating WindowProcessor to handle the events.
boolean	isStateful()
void	setPublisher(StreamJunction.Publisher publisher) Set Publisher to which the the output events from internal window have to be sent.

Methods inherited from class java.lang.Object

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

Constructor Detail

Window

public Window(io.siddhi.query.api.definition.WindowDefinition windowDefinition,
              SiddhiAppContext siddhiAppContext)

Construct a Window object.

Parameters:

windowDefinition - definition of the window

siddhiAppContext - siddhi app context of Siddhi

Method Detail

init

public void init(Map<String,Table> tableMap,
                 Map<String,Window> eventWindowMap,
                 String windowName,
                 boolean findToBeExecuted)

Initialize the WindowEvent table by creating WindowProcessor to handle the events.

Parameters:

tableMap - map of Tables

eventWindowMap - map of EventWindows

windowName - name of the query window belongs to.

findToBeExecuted - will find will be executed on the window.

setPublisher

public void setPublisher(StreamJunction.Publisher publisher)

Set Publisher to which the the output events from internal window have to be sent.

Parameters:

publisher - output publisher

getWindowDefinition

public io.siddhi.query.api.definition.WindowDefinition getWindowDefinition()

Return the WindowDefinition used to construct this Window.

Returns:

the window definition

add

public void add(ComplexEventChunk complexEventChunk)

Add the given ComplexEventChunk to the Window.

Parameters:

complexEventChunk - the event chunk to be added

find

public StreamEvent find(StateEvent matchingEvent,
                        CompiledCondition compiledCondition)

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)

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

getLock

public LockWrapper getLock()

getProcessingMode

public ProcessingMode getProcessingMode()

isStateful

public boolean isStateful()