public class AggregateWindowProcessor extends BatchingWindowProcessor implements FindableProcessor
WindowProcessor
intended to be used with aggregate join queries.
This processor keeps a reference of the Aggregate and finds the items from that.
The process method just passes the events to the next
JoinProcessor
inorder to handle
the events there.attributeExpressionExecutors, attributeExpressionLength, complexEventPopulater, inputDefinition, metaStreamEvent, nextProcessor, siddhiQueryContext, stateHolder, streamEventClonerHolder
Constructor and Description |
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AggregateWindowProcessor(AggregationRuntime aggregationRuntime,
io.siddhi.query.api.aggregation.Within within,
io.siddhi.query.api.expression.Expression per,
List<io.siddhi.query.api.expression.Variable> queryGroupByList) |
Modifier and Type | Method and Description |
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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.
|
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
|
protected void |
process(ComplexEventChunk streamEventChunk,
Processor nextProcessor,
StreamEventCloner streamEventCloner,
State state)
The main processing method that will be called upon event arrival
|
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.
|
getProcessingMode, init, processEventChunk
getReturnAttributes
constructStreamEventPopulater, getNextProcessor, initProcessor, process, setNextProcessor, setStreamEventCloner, setToLast
public AggregateWindowProcessor(AggregationRuntime aggregationRuntime, io.siddhi.query.api.aggregation.Within within, io.siddhi.query.api.expression.Expression per, List<io.siddhi.query.api.expression.Variable> queryGroupByList)
protected StateFactory init(ExpressionExecutor[] attributeExpressionExecutors, ConfigReader configReader, StreamEventClonerHolder streamEventClonerHolder, boolean outputExpectsExpiredEvents, boolean findToBeExecuted, SiddhiQueryContext siddhiQueryContext)
BatchingWindowProcessor
init
in class BatchingWindowProcessor
attributeExpressionExecutors
- the executors of each function parametersconfigReader
- the config reader of windowstreamEventClonerHolder
- stream event cloner holderoutputExpectsExpiredEvents
- is expired events sent as outputfindToBeExecuted
- find operation will be performedsiddhiQueryContext
- the context of the siddhi queryprotected void process(ComplexEventChunk streamEventChunk, Processor nextProcessor, StreamEventCloner streamEventCloner, State state)
BatchingWindowProcessor
process
in class BatchingWindowProcessor
streamEventChunk
- the stream event chunk that need to be processednextProcessor
- the next processor to which the success events need to be passedstreamEventCloner
- helps to clone the incoming event for local storage or modificationstate
- current state of the processorpublic StreamEvent find(StateEvent matchingEvent, CompiledCondition compiledCondition)
FindableProcessor
find
in interface FindableProcessor
matchingEvent
- the event to be matched with the events at the processorcompiledCondition
- the execution element responsible for matching the corresponding events that matches
the matchingEvent based on pool of events at Processorpublic CompiledCondition compileCondition(io.siddhi.query.api.expression.Expression condition, MatchingMetaInfoHolder matchingMetaInfoHolder, List<VariableExpressionExecutor> variableExpressionExecutors, Map<String,Table> tableMap, SiddhiQueryContext siddhiQueryContext)
FindableProcessor
compileCondition
in interface FindableProcessor
condition
- the matching conditionmatchingMetaInfoHolder
- the meta structure of the incoming matchingEventvariableExpressionExecutors
- the list of variable ExpressionExecutors already createdtableMap
- map of event tablessiddhiQueryContext
- current siddhi query contextpublic void start()
ExternalReferencedHolder
start
in interface ExternalReferencedHolder
public void stop()
ExternalReferencedHolder
stop
in interface ExternalReferencedHolder
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