Examples of com.espertech.esper.view.Viewable

com.espertech.esper.view.Viewable
The Viewable interface marks an object as supporting zero, one or more View instances. All implementing classes must call each view's 'update' method when new data enters it. Implementations must take care to synchronize methods of this interface with other methods such that data flow is threadsafe.

                                        AgentInstanceContext agentInstanceContext,
                                        EvalRootState[] patternRoots,
                                        boolean suppressSameEventMatches,
                                        boolean discardPartialsOnMatch)
    {
        Viewable finalView = view;


        // Add filter view that evaluates the filter expression
        if (statementSpec.getFilterRootNode() != null)
        {
            FilterExprView filterView = new FilterExprView(statementSpec.getFilterRootNode(), statementSpec.getFilterRootNode().getExprEvaluator(), agentInstanceContext);
            finalView.addView(filterView);
            finalView = filterView;
        }


        Deque<EPStatementDispatch> dispatches = null;


        if (patternRoots[0] != null && (suppressSameEventMatches || discardPartialsOnMatch)) {
            PatternRemoveDispatchView v = new PatternRemoveDispatchView(patternRoots[0], suppressSameEventMatches, discardPartialsOnMatch);
            dispatches = new ArrayDeque<EPStatementDispatch>(2);
            dispatches.add(v);
            finalView.addView(v);
            finalView = v;
        }


        // for ordered deliver without output limit/buffer
        if (statementSpec.getOrderByList().length > 0 && (statementSpec.getOutputLimitSpec() == null)) {
            SingleStreamDispatchView bf = new SingleStreamDispatchView();
            if (dispatches == null) {
                dispatches = new ArrayDeque<EPStatementDispatch>(1);
            }
            dispatches.add(bf);
            finalView.addView(bf);
            finalView = bf;
        }


        if (dispatches != null) {
            EPStatementAgentInstanceHandle handle = agentInstanceContext.getEpStatementAgentInstanceHandle();
            if (dispatches.size() == 1) {
                handle.setOptionalDispatchable(dispatches.getFirst());
            }
            else {
                final EPStatementDispatch[] dispatchArray = dispatches.toArray(new EPStatementDispatch[dispatches.size()]);
                handle.setOptionalDispatchable(new EPStatementDispatch() {
                    public void execute(ExprEvaluatorContext exprEvaluatorContext) {
                        for (EPStatementDispatch dispatch : dispatchArray) {
                            dispatch.execute(exprEvaluatorContext);
                        }
                    }
                });
            }
        }


        com.espertech.esper.view.View selectView = outputProcessViewFactory.makeView(resultSetProcessor, agentInstanceContext);


        finalView.addView(selectView);
        finalView = selectView;


        return finalView;
    }

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        // add statically typed event type references: those in the from clause; Dynamic (created) types collected by statement context and added on start
        services.getStatementEventTypeRefService().addReferences(desc.getEpStatement().getName(), desc.getStatementContext().getDynamicReferenceEventTypes());


        // hook up
        Viewable parentView = startResult.getViewable();
        desc.setStopMethod(startResult.getStopMethod());
        desc.setDestroyMethod(startResult.getDestroyMethod());
        statement.setParentView(parentView);
        long timeLastStateChange = services.getSchedulingService().getTime();
        statement.setCurrentState(EPStatementState.STARTED, timeLastStateChange);

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        }


        // create factory chain context to hold callbacks specific to "prior" and "prev"
        AgentInstanceViewFactoryChainContext viewFactoryChainContext = AgentInstanceViewFactoryChainContext.create(viewFactoryChain, agentInstanceContext, viewResourceDelegate.getPerStream()[0]);


        Viewable subselectView = services.getViewService().createViews(viewableRoot, viewFactoryChain, viewFactoryChainContext, false);


        // create index/holder table
        EventTable index = pair.getFirst().makeEventTable();
        stopCallbackList.add(new SubqueryStopCallback(index));


        // create strategy
        SubordTableLookupStrategy strategy = pair.getSecond().makeStrategy(index);
        SubselectAggregationPreprocessor subselectAggregationPreprocessor = null;


        // handle "prior" nodes and their strategies
        Map<ExprPriorNode, ExprPriorEvalStrategy> priorNodeStrategies = EPStatementStartMethodHelperPrior.compilePriorNodeStrategies(viewResourceDelegate, new AgentInstanceViewFactoryChainContext[]{viewFactoryChainContext});


        // handle "previous" nodes and their strategies
        Map<ExprPreviousNode, ExprPreviousEvalStrategy> previousNodeStrategies = EPStatementStartMethodHelperPrevious.compilePreviousNodeStrategies(viewResourceDelegate, new AgentInstanceViewFactoryChainContext[]{viewFactoryChainContext});


        AggregationService aggregationService = null;
        if (aggregationServiceFactory != null) {
            aggregationService = aggregationServiceFactory.getAggregationServiceFactory().makeService(agentInstanceContext);


            if (!correlatedSubquery) {
                SubselectAggregatorView aggregatorView = new SubselectAggregatorView(aggregationService, filterExprEval, agentInstanceContext);
                subselectView.addView(aggregatorView);


                preload(services, null, aggregatorView, agentInstanceContext);


                return new SubSelectStrategyRealization(NULL_ROW_STRATEGY, null, aggregationService, priorNodeStrategies, previousNodeStrategies);
            }
            else {
                subselectAggregationPreprocessor = new SubselectAggregationPreprocessor(aggregationService, filterExprEval);
            }
        }


        // preload
        preload(services, index, subselectView, agentInstanceContext);


        BufferView bufferView = new BufferView(subSelectHolder.getStreamNumber());
        bufferView.setObserver(new SubselectBufferObserver(index));
        subselectView.addView(bufferView);


        return new SubSelectStrategyRealization(strategy, subselectAggregationPreprocessor, aggregationService, priorNodeStrategies, previousNodeStrategies);
    }

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            public void stop() {
                StatementAgentInstanceUtil.stopSafe(agentInstanceContext.getTerminationCallbacks(), stopCallbacks, statementContext);
            }
        };


        Viewable finalView;
        ViewableActivationResult[] viewableActivationResult = new ViewableActivationResult[eventStreamParentViewableActivators.length];
        Map<ExprSubselectNode, SubSelectStrategyHolder> subselectStrategies;
        AggregationService aggregationService;
        Viewable[] streamViews;
        Map<ExprPriorNode, ExprPriorEvalStrategy> priorNodeStrategies;

View Full Code Here


    private Viewable handleSimpleSelect(Viewable view,
                                        ResultSetProcessor resultSetProcessor,
                                        AgentInstanceContext agentInstanceContext)
    {
        Viewable finalView = view;


        // Add filter view that evaluates the filter expression
        if (statementSpec.getFilterRootNode() != null)
        {
            FilterExprView filterView = new FilterExprView(statementSpec.getFilterRootNode().getExprEvaluator(), agentInstanceContext);
            finalView.addView(filterView);
            finalView = filterView;
        }


        // for ordered deliver without output limit/buffer
        if (!statementSpec.getOrderByList().isEmpty() && (statementSpec.getOutputLimitSpec() == null)) {
            SingleStreamDispatchView bf = new SingleStreamDispatchView();
            agentInstanceContext.getEpStatementAgentInstanceHandle().setOptionalDispatchable(bf);
            finalView.addView(bf);
            finalView = bf;
        }


        com.espertech.esper.view.View selectView = outputProcessViewFactory.makeView(resultSetProcessor, agentInstanceContext);


        finalView.addView(selectView);
        finalView = selectView;


        return finalView;
    }

View Full Code Here

                    services.getEventAdapterService().removeType(allocatedEventType.getName());
                    services.getFilterService().removeType(allocatedEventType);
                }
            }
        };
        Viewable viewable = new ViewableDefaultImpl(eventType);
        return new EPStatementStartResult(viewable, stopMethod, null);
    }

View Full Code Here

                StatementAgentInstanceUtil.stopSafe(agentInstanceContext.getTerminationCallbacks(), stopCallbacks, statementContext);
            }
        };


        String windowName = statementSpec.getCreateWindowDesc().getWindowName();
        Viewable finalView;


        try {
            // Register interest
            ViewableActivationResult activationResult = activator.activate(agentInstanceContext);
            stopCallbacks.add(activationResult.getStopCallback());
            Viewable eventStreamParentViewable = activationResult.getViewable();


            // Obtain processor for this named window
            NamedWindowProcessor processor = services.getNamedWindowService().getProcessor(windowName);


            // Allocate processor instance
            NamedWindowProcessorInstance processorInstance = processor.addInstance(agentInstanceContext);
            View rootView = processorInstance.getRootViewInstance();
            eventStreamParentViewable.addView(rootView);


            // Materialize views
            AgentInstanceViewFactoryChainContext viewFactoryChainContext = new AgentInstanceViewFactoryChainContext(agentInstanceContext, true, null, null);
            finalView = services.getViewService().createViews(rootView, unmaterializedViewChain.getViewFactoryChain(), viewFactoryChainContext, false);

View Full Code Here


        // add statically typed event type references: those in the from clause; Dynamic (created) types collected by statement context and added on start
        services.getStatementEventTypeRefService().addReferences(desc.getEpStatement().getName(), desc.getStatementContext().getDynamicReferenceEventTypes());


        // hook up
        Viewable parentView = startResult.getViewable();
        desc.setStopMethod(startResult.getStopMethod());
        desc.setDestroyMethod(startResult.getDestroyMethod());
        statement.setParentView(parentView);
        long timeLastStateChange = services.getSchedulingService().getTime();
        statement.setCurrentState(EPStatementState.STARTED, timeLastStateChange);

View Full Code Here


        // create context factory
        StatementAgentInstanceFactoryOnTrigger contextFactory = new StatementAgentInstanceFactoryOnTrigger(statementContext, statementSpec, services, activator, subSelectStrategyCollection, resultSetProcessorPrototype, validatedJoin, activatorResultEventType, splitDesc, outputResultSetProcessorPrototype, onSetVariableViewFactory, onExprFactory, outputViewFactory, isRecoveringStatement);


        // perform start of hook-up to start
        Viewable finalViewable;
        EPStatementStopMethod stopStatementMethod;
        EPStatementDestroyMethod destroyStatementMethod;
        Map<ExprSubselectNode, SubSelectStrategyHolder> subselectStrategyInstances;
        AggregationService aggregationService;

View Full Code Here

        }


        // create factory chain context to hold callbacks specific to "prior" and "prev"
        AgentInstanceViewFactoryChainContext viewFactoryChainContext = AgentInstanceViewFactoryChainContext.create(viewFactoryChain, agentInstanceContext, viewResourceDelegate.getPerStream()[0]);


        Viewable subselectView = services.getViewService().createViews(viewableRoot, viewFactoryChain, viewFactoryChainContext, false);


        // create index/holder table
        EventTable index = pair.getFirst().makeEventTable();
        stopCallbackList.add(new SubqueryStopCallback(index));


        // create strategy
        SubordTableLookupStrategy strategy = pair.getSecond().makeStrategy(index);
        SubselectAggregationPreprocessor subselectAggregationPreprocessor = null;


        // handle "prior" nodes and their strategies
        Map<ExprPriorNode, ExprPriorEvalStrategy> priorNodeStrategies = EPStatementStartMethodHelperPrior.compilePriorNodeStrategies(viewResourceDelegate, new AgentInstanceViewFactoryChainContext[]{viewFactoryChainContext});


        // handle "previous" nodes and their strategies
        Map<ExprPreviousNode, ExprPreviousEvalStrategy> previousNodeStrategies = EPStatementStartMethodHelperPrevious.compilePreviousNodeStrategies(viewResourceDelegate, new AgentInstanceViewFactoryChainContext[]{viewFactoryChainContext});


        AggregationService aggregationService = null;
        if (aggregationServiceFactory != null) {
            aggregationService = aggregationServiceFactory.getAggregationServiceFactory().makeService(agentInstanceContext, agentInstanceContext.getStatementContext().getMethodResolutionService());


            if (!correlatedSubquery) {
                SubselectAggregatorView aggregatorView = new SubselectAggregatorView(aggregationService, filterExprEval, agentInstanceContext);
                subselectView.addView(aggregatorView);


                preload(services, null, aggregatorView, agentInstanceContext);


                return new SubSelectStrategyRealization(NULL_ROW_STRATEGY, null, aggregationService, priorNodeStrategies, previousNodeStrategies);
            }
            else {
                subselectAggregationPreprocessor = new SubselectAggregationPreprocessor(aggregationService, filterExprEval);
            }
        }


        // preload
        preload(services, index, subselectView, agentInstanceContext);


        BufferView bufferView = new BufferView(subSelectHolder.getStreamNumber());
        bufferView.setObserver(new SubselectBufferObserver(index));
        subselectView.addView(bufferView);


        return new SubSelectStrategyRealization(strategy, subselectAggregationPreprocessor, aggregationService, priorNodeStrategies, previousNodeStrategies);
    }

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Related Classes of com.espertech.esper.view.Viewable

com.espertech.esper.core.context.factory.StatementAgentInstanceFactoryCreateWindow

com.espertech.esper.core.context.factory.StatementAgentInstanceFactorySelect

com.espertech.esper.core.context.factory.StatementAgentInstancePostLoadSelect

com.espertech.esper.core.context.subselect.SubSelectStrategyFactoryLocalViewPreloaded

com.espertech.esper.core.service.StatementLifecycleSvcImpl

com.espertech.esper.core.start.EPStatementStartMethodCreateIndex

com.espertech.esper.core.start.EPStatementStartMethodCreateSchema

com.espertech.esper.core.start.EPStatementStartMethodCreateVariable

com.espertech.esper.core.start.EPStatementStartMethodOnTrigger

com.espertech.esper.core.start.EPStatementStartMethodSelect

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