org.wso2.siddhi.core.table

Class InMemoryEventTable

java.lang.Object

org.wso2.siddhi.core.table.InMemoryEventTable

All Implemented Interfaces:

FindableProcessor, EventTable, Snapshotable

public class InMemoryEventTable
extends Object
implements EventTable, Snapshotable

In-memory event table implementation of SiddhiQL.

Constructor Summary

Constructors

Constructor and Description
InMemoryEventTable()

Method Summary

Modifier and Type	Method and Description
void	add(ComplexEventChunk<StreamEvent> addingEventChunk)
Finder	constructFinder(org.wso2.siddhi.query.api.expression.Expression expression, MatchingMetaStateHolder matchingMetaStateHolder, ExecutionPlanContext executionPlanContext, List<VariableExpressionExecutor> variableExpressionExecutors, Map<String,EventTable> eventTableMap) 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.
Operator	constructOperator(org.wso2.siddhi.query.api.expression.Expression expression, MatchingMetaStateHolder matchingMetaStateHolder, ExecutionPlanContext executionPlanContext, List<VariableExpressionExecutor> variableExpressionExecutors, Map<String,EventTable> eventTableMap)
boolean	contains(StateEvent matchingEvent, Finder finder)
Object[]	currentState() Used to collect the serializable state of the processing element, that need to be persisted for the reconstructing the element to the same state on a different point of time
void	delete(ComplexEventChunk<StateEvent> deletingEventChunk, Operator operator)
StreamEvent	find(StateEvent matchingEvent, Finder finder) To find events from the processor event pool, that the matches the matchingEvent based on finder logic.
String	getElementId()
org.wso2.siddhi.query.api.definition.TableDefinition	getTableDefinition()
void	init(org.wso2.siddhi.query.api.definition.TableDefinition tableDefinition, MetaStreamEvent tableMetaStreamEvent, StreamEventPool tableStreamEventPool, StreamEventCloner tableStreamEventCloner, ExecutionPlanContext executionPlanContext)
void	overwriteOrAdd(ComplexEventChunk<StateEvent> overwritingOrAddingEventChunk, Operator operator, UpdateAttributeMapper[] updateAttributeMappers, OverwritingStreamEventExtractor overwritingStreamEventExtractor)
void	restoreState(Object[] state) Used to restore serialized state of the processing element, for reconstructing the element to the same state as if was on a previous point of time.
void	update(ComplexEventChunk<StateEvent> updatingEventChunk, Operator operator, UpdateAttributeMapper[] updateAttributeMappers)

Methods inherited from class java.lang.Object

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

Constructor Detail

InMemoryEventTable

public InMemoryEventTable()

Method Detail

init

public void init(org.wso2.siddhi.query.api.definition.TableDefinition tableDefinition,
                 MetaStreamEvent tableMetaStreamEvent,
                 StreamEventPool tableStreamEventPool,
                 StreamEventCloner tableStreamEventCloner,
                 ExecutionPlanContext executionPlanContext)

Specified by:

init in interface EventTable

getTableDefinition

public org.wso2.siddhi.query.api.definition.TableDefinition getTableDefinition()

Specified by:

getTableDefinition in interface EventTable

add

public void add(ComplexEventChunk<StreamEvent> addingEventChunk)

Specified by:

add in interface EventTable

delete

public void delete(ComplexEventChunk<StateEvent> deletingEventChunk,
                   Operator operator)

Specified by:

delete in interface EventTable

update

public void update(ComplexEventChunk<StateEvent> updatingEventChunk,
                   Operator operator,
                   UpdateAttributeMapper[] updateAttributeMappers)

Specified by:

update in interface EventTable

overwriteOrAdd

public void overwriteOrAdd(ComplexEventChunk<StateEvent> overwritingOrAddingEventChunk,
                           Operator operator,
                           UpdateAttributeMapper[] updateAttributeMappers,
                           OverwritingStreamEventExtractor overwritingStreamEventExtractor)

Specified by:

overwriteOrAdd in interface EventTable

contains

public boolean contains(StateEvent matchingEvent,
                        Finder finder)

Specified by:

contains in interface EventTable

find

public StreamEvent find(StateEvent matchingEvent,
                        Finder finder)

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

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

Returns:

the matched events

constructFinder

public Finder constructFinder(org.wso2.siddhi.query.api.expression.Expression expression,
                              MatchingMetaStateHolder matchingMetaStateHolder,
                              ExecutionPlanContext executionPlanContext,
                              List<VariableExpressionExecutor> variableExpressionExecutors,
                              Map<String,EventTable> eventTableMap)

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:

constructFinder in interface FindableProcessor

Parameters:

expression - the matching expression

matchingMetaStateHolder - the meta structure of the incoming matchingEvent

executionPlanContext - current execution plan context

variableExpressionExecutors - the list of variable ExpressionExecutors already created

eventTableMap - map of event tables

Returns:

finder having the capability of finding events at the processor against the expression and incoming matchingEvent

constructOperator

public Operator constructOperator(org.wso2.siddhi.query.api.expression.Expression expression,
                                  MatchingMetaStateHolder matchingMetaStateHolder,
                                  ExecutionPlanContext executionPlanContext,
                                  List<VariableExpressionExecutor> variableExpressionExecutors,
                                  Map<String,EventTable> eventTableMap)

Specified by:

constructOperator in interface EventTable

currentState

public Object[] currentState()

Description copied from interface: Snapshotable

Used to collect the serializable state of the processing element, that need to be persisted for the reconstructing the element to the same state on a different point of time

Specified by:

currentState in interface Snapshotable

Returns:

stateful objects of the processing element as an array

restoreState

public void restoreState(Object[] state)

Description copied from interface: Snapshotable

Used to restore serialized state of the processing element, for reconstructing the element to the same state as if was on a previous point of time.

Specified by:

restoreState in interface Snapshotable

Parameters:

state - the stateful objects of the element as an array on the same order provided by currentState().

getElementId

public String getElementId()

Specified by:

getElementId in interface Snapshotable