public override EPStatementStartResult StartInternal(EPServicesContext services, StatementContext statementContext, bool isNewStatement, bool isRecoveringStatement, bool isRecoveringResilient) { // validate use of table: may not both read and write ValidateTableAccessUse(StatementSpec.IntoTableSpec, StatementSpec.TableNodes); var contextName = StatementSpec.OptionalContextName; var defaultAgentInstanceContext = GetDefaultAgentInstanceContext(statementContext); var selectDesc = EPStatementStartMethodSelectUtil.Prepare(StatementSpec, services, statementContext, isRecoveringResilient, defaultAgentInstanceContext, IsQueryPlanLogging(services), null, null, null); statementContext.StatementAgentInstanceFactory = selectDesc.StatementAgentInstanceFactorySelect; // allow extension to walk statementContext.StatementExtensionServicesContext.PreStartWalk(selectDesc); // Determine context EPStatementStopMethod stopStatementMethod; Viewable finalViewable; AggregationService aggregationService; IDictionary <ExprSubselectNode, SubSelectStrategyHolder> subselectStrategyInstances; IDictionary <ExprPriorNode, ExprPriorEvalStrategy> priorStrategyInstances; IDictionary <ExprPreviousNode, ExprPreviousEvalStrategy> previousStrategyInstances; IDictionary <ExprTableAccessNode, ExprTableAccessEvalStrategy> tableAccessStrategyInstances; var preloadList = Collections.GetEmptyList <StatementAgentInstancePreload>(); RegexExprPreviousEvalStrategy matchRecognizePrevEvalStrategy; // With context - delegate instantiation to context if (StatementSpec.OptionalContextName != null) { // use statement-wide agent-instance-specific aggregation service aggregationService = statementContext.StatementAgentInstanceRegistry.AgentInstanceAggregationService; // use statement-wide agent-instance-specific subselects var aiRegistryExpr = statementContext.StatementAgentInstanceRegistry.AgentInstanceExprService; subselectStrategyInstances = new Dictionary <ExprSubselectNode, SubSelectStrategyHolder>(); foreach (var entry in selectDesc.SubSelectStrategyCollection.Subqueries) { var specificService = aiRegistryExpr.AllocateSubselect(entry.Key); entry.Key.Strategy = specificService; IDictionary <ExprPriorNode, ExprPriorEvalStrategy> subselectPriorStrategies = new Dictionary <ExprPriorNode, ExprPriorEvalStrategy>(); foreach (var subselectPrior in entry.Value.PriorNodesList) { var specificSubselectPriorService = aiRegistryExpr.AllocatePrior(subselectPrior); subselectPriorStrategies.Put(subselectPrior, specificSubselectPriorService); } IDictionary <ExprPreviousNode, ExprPreviousEvalStrategy> subselectPreviousStrategies = new Dictionary <ExprPreviousNode, ExprPreviousEvalStrategy>(); foreach (var subselectPrevious in entry.Value.PrevNodesList) { var specificSubselectPreviousService = aiRegistryExpr.AllocatePrevious(subselectPrevious); subselectPreviousStrategies.Put(subselectPrevious, specificSubselectPreviousService); } var subselectAggregation = aiRegistryExpr.AllocateSubselectAggregation(entry.Key); var strategyHolder = new SubSelectStrategyHolder(specificService, subselectAggregation, subselectPriorStrategies, subselectPreviousStrategies, null, null, null); subselectStrategyInstances.Put(entry.Key, strategyHolder); } // use statement-wide agent-instance-specific "prior" priorStrategyInstances = new Dictionary <ExprPriorNode, ExprPriorEvalStrategy>(); foreach (var priorNode in selectDesc.ViewResourceDelegateUnverified.PriorRequests) { var specificService = aiRegistryExpr.AllocatePrior(priorNode); priorStrategyInstances.Put(priorNode, specificService); } // use statement-wide agent-instance-specific "previous" previousStrategyInstances = new Dictionary <ExprPreviousNode, ExprPreviousEvalStrategy>(); foreach (var previousNode in selectDesc.ViewResourceDelegateUnverified.PreviousRequests) { var specificService = aiRegistryExpr.AllocatePrevious(previousNode); previousStrategyInstances.Put(previousNode, specificService); } // use statement-wide agent-instance-specific match-recognize "previous" matchRecognizePrevEvalStrategy = aiRegistryExpr.AllocateMatchRecognizePrevious(); // use statement-wide agent-instance-specific tables tableAccessStrategyInstances = new Dictionary <ExprTableAccessNode, ExprTableAccessEvalStrategy>(); if (StatementSpec.TableNodes != null) { foreach (ExprTableAccessNode tableNode in StatementSpec.TableNodes) { var specificService = aiRegistryExpr.AllocateTableAccess(tableNode); tableAccessStrategyInstances.Put(tableNode, specificService); } } var mergeView = new ContextMergeView(selectDesc.ResultSetProcessorPrototypeDesc.ResultSetProcessorFactory.ResultEventType); finalViewable = mergeView; var statement = new ContextManagedStatementSelectDesc(StatementSpec, statementContext, mergeView, selectDesc.StatementAgentInstanceFactorySelect, selectDesc.ResultSetProcessorPrototypeDesc.AggregationServiceFactoryDesc.Expressions, selectDesc.SubSelectStrategyCollection); services.ContextManagementService.AddStatement(contextName, statement, isRecoveringResilient); var selectStop = selectDesc.StopMethod; stopStatementMethod = new ProxyEPStatementStopMethod(() => { services.ContextManagementService.StoppedStatement( contextName, statementContext.StatementName, statementContext.StatementId, statementContext.Expression, statementContext.ExceptionHandlingService); selectStop.Stop(); }); selectDesc.DestroyCallbacks.AddCallback(new EPStatementDestroyCallbackContext(services.ContextManagementService, contextName, statementContext.StatementName, statementContext.StatementId)); } // Without context - start here else { var resultOfStart = (StatementAgentInstanceFactorySelectResult)selectDesc.StatementAgentInstanceFactorySelect.NewContext(defaultAgentInstanceContext, isRecoveringResilient); finalViewable = resultOfStart.FinalView; var startResultStop = services.EpStatementFactory.MakeStopMethod(resultOfStart); var selectStop = selectDesc.StopMethod; stopStatementMethod = new ProxyEPStatementStopMethod(() => { StatementAgentInstanceUtil.StopSafe(startResultStop, statementContext); selectStop.Stop(); }); aggregationService = resultOfStart.OptionalAggegationService; subselectStrategyInstances = resultOfStart.SubselectStrategies; priorStrategyInstances = resultOfStart.PriorNodeStrategies; previousStrategyInstances = resultOfStart.PreviousNodeStrategies; tableAccessStrategyInstances = resultOfStart.TableAccessEvalStrategies; preloadList = resultOfStart.PreloadList; matchRecognizePrevEvalStrategy = null; if (resultOfStart.TopViews.Length > 0) { EventRowRegexNFAViewService matchRecognize = EventRowRegexHelper.RecursiveFindRegexService(resultOfStart.TopViews[0]); if (matchRecognize != null) { matchRecognizePrevEvalStrategy = matchRecognize.PreviousEvaluationStrategy; } } if (statementContext.StatementExtensionServicesContext != null && statementContext.StatementExtensionServicesContext.StmtResources != null) { StatementResourceHolder holder = statementContext.StatementExtensionServicesContext.ExtractStatementResourceHolder(resultOfStart); statementContext.StatementExtensionServicesContext.StmtResources.Unpartitioned = holder; statementContext.StatementExtensionServicesContext.PostProcessStart(resultOfStart, isRecoveringResilient); } } var matchRecognizeNodes = selectDesc.StatementAgentInstanceFactorySelect.ViewResourceDelegate.PerStream[0].MatchRecognizePreviousRequests; // assign strategies to expression nodes EPStatementStartMethodHelperAssignExpr.AssignExpressionStrategies( selectDesc, aggregationService, subselectStrategyInstances, priorStrategyInstances, previousStrategyInstances, matchRecognizeNodes, matchRecognizePrevEvalStrategy, tableAccessStrategyInstances); // execute preload if any foreach (var preload in preloadList) { preload.ExecutePreload(); } // handle association to table if (StatementSpec.IntoTableSpec != null) { services.StatementVariableRefService.AddReferences(statementContext.StatementName, StatementSpec.IntoTableSpec.Name); } return(new EPStatementStartResult(finalViewable, stopStatementMethod, selectDesc.DestroyCallbacks)); }
protected override StatementAgentInstanceFactoryResult NewContextInternal(AgentInstanceContext agentInstanceContext, bool isRecoveringResilient) { IList <StopCallback> stopCallbacks = new List <StopCallback>(2); Viewable finalView; var viewableActivationResult = new ViewableActivationResult[_eventStreamParentViewableActivators.Length]; IDictionary <ExprSubselectNode, SubSelectStrategyHolder> subselectStrategies; AggregationService aggregationService; Viewable[] streamViews; Viewable[] eventStreamParentViewable; Viewable[] topViews; IDictionary <ExprPriorNode, ExprPriorEvalStrategy> priorNodeStrategies; IDictionary <ExprPreviousNode, ExprPreviousEvalStrategy> previousNodeStrategies; IDictionary <ExprTableAccessNode, ExprTableAccessEvalStrategy> tableAccessStrategies; RegexExprPreviousEvalStrategy regexExprPreviousEvalStrategy = null; IList <StatementAgentInstancePreload> preloadList = new List <StatementAgentInstancePreload>(); EvalRootState[] patternRoots; StatementAgentInstancePostLoad postLoadJoin = null; var suppressSameEventMatches = false; var discardPartialsOnMatch = false; EvalRootMatchRemover evalRootMatchRemover = null; try { // create root viewables eventStreamParentViewable = new Viewable[_numStreams]; patternRoots = new EvalRootState[_numStreams]; for (var stream = 0; stream < _eventStreamParentViewableActivators.Length; stream++) { var activationResult = _eventStreamParentViewableActivators[stream].Activate(agentInstanceContext, false, isRecoveringResilient); viewableActivationResult[stream] = activationResult; stopCallbacks.Add(activationResult.StopCallback); suppressSameEventMatches = activationResult.IsSuppressSameEventMatches; discardPartialsOnMatch = activationResult.IsDiscardPartialsOnMatch; // add stop callback for any stream-level viewable when applicable if (activationResult.Viewable is StopCallback) { stopCallbacks.Add((StopCallback)activationResult.Viewable); } eventStreamParentViewable[stream] = activationResult.Viewable; patternRoots[stream] = activationResult.OptionalPatternRoot; if (stream == 0) { evalRootMatchRemover = activationResult.OptEvalRootMatchRemover; } if (activationResult.OptionalLock != null) { agentInstanceContext.EpStatementAgentInstanceHandle.StatementAgentInstanceLock = activationResult.OptionalLock; _statementContext.DefaultAgentInstanceLock = activationResult.OptionalLock; } } // compile view factories adding "prior" as necessary var viewFactoryChains = new IList <ViewFactory> [_numStreams]; for (var i = 0; i < _numStreams; i++) { var viewFactoryChain = _unmaterializedViewChain[i].FactoryChain; // add "prior" view factory var hasPrior = _viewResourceDelegate.PerStream[i].PriorRequests != null && !_viewResourceDelegate.PerStream[i].PriorRequests.IsEmpty(); if (hasPrior) { var priorEventViewFactory = EPStatementStartMethodHelperPrior.GetPriorEventViewFactory( agentInstanceContext.StatementContext, i, viewFactoryChain.IsEmpty(), false, -1); viewFactoryChain = new List <ViewFactory>(viewFactoryChain); viewFactoryChain.Add(priorEventViewFactory); } viewFactoryChains[i] = viewFactoryChain; } // create view factory chain context: holds stream-specific services var viewFactoryChainContexts = new AgentInstanceViewFactoryChainContext[_numStreams]; for (var i = 0; i < _numStreams; i++) { viewFactoryChainContexts[i] = AgentInstanceViewFactoryChainContext.Create(viewFactoryChains[i], agentInstanceContext, _viewResourceDelegate.PerStream[i]); } // handle "prior" nodes and their strategies priorNodeStrategies = EPStatementStartMethodHelperPrior.CompilePriorNodeStrategies(_viewResourceDelegate, viewFactoryChainContexts); // handle "previous" nodes and their strategies previousNodeStrategies = EPStatementStartMethodHelperPrevious.CompilePreviousNodeStrategies(_viewResourceDelegate, viewFactoryChainContexts); // materialize views streamViews = new Viewable[_numStreams]; topViews = new Viewable[_numStreams]; for (var i = 0; i < _numStreams; i++) { var hasPreviousNode = _viewResourceDelegate.PerStream[i].PreviousRequests != null && !_viewResourceDelegate.PerStream[i].PreviousRequests.IsEmpty(); var createResult = _services.ViewService.CreateViews(eventStreamParentViewable[i], viewFactoryChains[i], viewFactoryChainContexts[i], hasPreviousNode); topViews[i] = createResult.TopViewable; streamViews[i] = createResult.FinalViewable; var isReuseableView = _eventStreamParentViewableActivators[i] is ViewableActivatorStreamReuseView; if (isReuseableView) { var viewsCreated = createResult.NewViews; var stopCallback = new ProxyStopCallback(() => { ViewServiceHelper.RemoveFirstUnsharedView(viewsCreated); }); stopCallbacks.Add(stopCallback); } // add views to stop callback if applicable AddViewStopCallback(stopCallbacks, createResult.NewViews); } // determine match-recognize "previous"-node strategy (none if not present, or one handling and number of nodes) var matchRecognize = EventRowRegexHelper.RecursiveFindRegexService(topViews[0]); if (matchRecognize != null) { regexExprPreviousEvalStrategy = matchRecognize.PreviousEvaluationStrategy; stopCallbacks.Add(new ProxyStopCallback(matchRecognize.Stop)); } // start subselects subselectStrategies = EPStatementStartMethodHelperSubselect.StartSubselects(_services, _subSelectStrategyCollection, agentInstanceContext, stopCallbacks, isRecoveringResilient); // plan table access tableAccessStrategies = EPStatementStartMethodHelperTableAccess.AttachTableAccess(_services, agentInstanceContext, _statementSpec.TableNodes); // obtain result set processor and aggregation services var processorPair = EPStatementStartMethodHelperUtil.StartResultSetAndAggregation(_resultSetProcessorFactoryDesc, agentInstanceContext, false, null); var resultSetProcessor = processorPair.First; aggregationService = processorPair.Second; stopCallbacks.Add(aggregationService); stopCallbacks.Add(resultSetProcessor); // for just 1 event stream without joins, handle the one-table process separately. JoinPreloadMethod joinPreloadMethod; JoinSetComposerDesc joinSetComposer = null; if (streamViews.Length == 1) { finalView = HandleSimpleSelect(streamViews[0], resultSetProcessor, agentInstanceContext, evalRootMatchRemover, suppressSameEventMatches, discardPartialsOnMatch); joinPreloadMethod = null; } else { var joinPlanResult = HandleJoin(_typeService.StreamNames, streamViews, resultSetProcessor, agentInstanceContext, stopCallbacks, _joinAnalysisResult, isRecoveringResilient); finalView = joinPlanResult.Viewable; joinPreloadMethod = joinPlanResult.PreloadMethod; joinSetComposer = joinPlanResult.JoinSetComposerDesc; } // for stoppable final views, add callback if (finalView is StopCallback) { stopCallbacks.Add((StopCallback)finalView); } // Replay any named window data, for later consumers of named data windows if (_services.EventTableIndexService.AllowInitIndex(isRecoveringResilient)) { var hasNamedWindow = false; var namedWindowPostloadFilters = new FilterSpecCompiled[_statementSpec.StreamSpecs.Length]; var namedWindowTailViews = new NamedWindowTailViewInstance[_statementSpec.StreamSpecs.Length]; var namedWindowFilters = new IList <ExprNode> [_statementSpec.StreamSpecs.Length]; for (var i = 0; i < _statementSpec.StreamSpecs.Length; i++) { var streamNum = i; var streamSpec = _statementSpec.StreamSpecs[i]; if (streamSpec is NamedWindowConsumerStreamSpec) { hasNamedWindow = true; var namedSpec = (NamedWindowConsumerStreamSpec)streamSpec; NamedWindowProcessor processor = _services.NamedWindowMgmtService.GetProcessor(namedSpec.WindowName); var processorInstance = processor.GetProcessorInstance(agentInstanceContext); if (processorInstance != null) { var consumerView = processorInstance.TailViewInstance; namedWindowTailViews[i] = consumerView; var view = (NamedWindowConsumerView)viewableActivationResult[i].Viewable; // determine preload/postload filter for index access if (!namedSpec.FilterExpressions.IsEmpty()) { namedWindowFilters[streamNum] = namedSpec.FilterExpressions; try { var streamName = streamSpec.OptionalStreamName != null ? streamSpec.OptionalStreamName : consumerView.EventType.Name; var types = new StreamTypeServiceImpl(consumerView.EventType, streamName, false, _services.EngineURI); var tagged = new LinkedHashMap <string, Pair <EventType, string> >(); namedWindowPostloadFilters[i] = FilterSpecCompiler.MakeFilterSpec(types.EventTypes[0], types.StreamNames[0], namedSpec.FilterExpressions, null, tagged, tagged, types, null, _statementContext, Collections.SingletonSet(0)); } catch (Exception ex) { Log.Warn("Unexpected exception analyzing filter paths: " + ex.Message, ex); } } // preload view for stream unless the expiry policy is batch window var preload = !consumerView.TailView.IsParentBatchWindow && consumerView.HasFirst(); if (preload) { if (isRecoveringResilient && _numStreams < 2) { preload = false; } } if (preload) { var yesRecoveringResilient = isRecoveringResilient; var preloadFilterSpec = namedWindowPostloadFilters[i]; preloadList.Add(new ProxyStatementAgentInstancePreload() { ProcExecutePreload = () => { var snapshot = consumerView.Snapshot(preloadFilterSpec, _statementContext.Annotations); var eventsInWindow = new List <EventBean>(snapshot.Count); ExprNodeUtility.ApplyFilterExpressionsIterable(snapshot, namedSpec.FilterExpressions, agentInstanceContext, eventsInWindow); EventBean[] newEvents = eventsInWindow.ToArray(); view.Update(newEvents, null); if (!yesRecoveringResilient && joinPreloadMethod != null && !joinPreloadMethod.IsPreloading && agentInstanceContext.EpStatementAgentInstanceHandle.OptionalDispatchable != null) { agentInstanceContext.EpStatementAgentInstanceHandle.OptionalDispatchable.Execute(); } }, }); } } else { Log.Info("Named window access is out-of-context, the named window '" + namedSpec.WindowName + "' has been declared for a different context then the current statement, the aggregation and join state will not be initialized for statement expression [" + _statementContext.Expression + "]"); } preloadList.Add(new ProxyStatementAgentInstancePreload() { ProcExecutePreload = () => { // in a join, preload indexes, if any if (joinPreloadMethod != null) { joinPreloadMethod.PreloadFromBuffer(streamNum); } else { if (agentInstanceContext.EpStatementAgentInstanceHandle.OptionalDispatchable != null) { agentInstanceContext.EpStatementAgentInstanceHandle.OptionalDispatchable.Execute(); } } }, }); } } // last, for aggregation we need to send the current join results to the result set processor if ((hasNamedWindow) && (joinPreloadMethod != null) && (!isRecoveringResilient) && _resultSetProcessorFactoryDesc.ResultSetProcessorFactory.HasAggregation) { preloadList.Add(new ProxyStatementAgentInstancePreload() { ProcExecutePreload = () => { joinPreloadMethod.PreloadAggregation(resultSetProcessor); }, }); } if (isRecoveringResilient) { postLoadJoin = new StatementAgentInstancePostLoadSelect(streamViews, joinSetComposer, namedWindowTailViews, namedWindowPostloadFilters, namedWindowFilters, _statementContext.Annotations, agentInstanceContext); } else if (joinSetComposer != null) { postLoadJoin = new StatementAgentInstancePostLoadIndexVisiting(joinSetComposer.JoinSetComposer); } } } catch (Exception) { var stopCallback = StatementAgentInstanceUtil.GetStopCallback(stopCallbacks, agentInstanceContext); StatementAgentInstanceUtil.StopSafe(stopCallback, _statementContext); if (InstrumentationHelper.ENABLED) { InstrumentationHelper.Get().AContextPartitionAllocate(); } throw; } var selectResult = new StatementAgentInstanceFactorySelectResult(finalView, null, agentInstanceContext, aggregationService, subselectStrategies, priorNodeStrategies, previousNodeStrategies, regexExprPreviousEvalStrategy, tableAccessStrategies, preloadList, patternRoots, postLoadJoin, topViews, eventStreamParentViewable, viewableActivationResult); if (_statementContext.StatementExtensionServicesContext != null) { _statementContext.StatementExtensionServicesContext.ContributeStopCallback(selectResult, stopCallbacks); } var stopCallbackX = StatementAgentInstanceUtil.GetStopCallback(stopCallbacks, agentInstanceContext); selectResult.StopCallback = stopCallbackX; return(selectResult); }