/// <summary> /// Creates a method-invocation polling view for use as a stream that calls a method, or pulls results from cache. /// </summary> /// <param name="streamNumber">the stream number</param> /// <param name="methodStreamSpec">defines the class and method to call</param> /// <param name="eventAdapterService">for creating event types and events</param> /// <param name="epStatementAgentInstanceHandle">for time-based callbacks</param> /// <param name="methodResolutionService">for resolving classes and imports</param> /// <param name="engineImportService">for resolving configurations</param> /// <param name="schedulingService">for scheduling callbacks in expiry-time based caches</param> /// <param name="scheduleBucket">for schedules within the statement</param> /// <param name="exprEvaluatorContext">expression evaluation context</param> /// <returns>pollable view</returns> /// <throws>ExprValidationException if the expressions cannot be validated or the method descriptorhas incorrect class and method names, or parameter number and types don't match /// </throws> public static HistoricalEventViewable CreatePollMethodView( int streamNumber, MethodStreamSpec methodStreamSpec, EventAdapterService eventAdapterService, EPStatementAgentInstanceHandle epStatementAgentInstanceHandle, MethodResolutionService methodResolutionService, EngineImportService engineImportService, SchedulingService schedulingService, ScheduleBucket scheduleBucket, ExprEvaluatorContext exprEvaluatorContext, VariableService variableService, String contextName) { VariableMetaData variableMetaData = variableService.GetVariableMetaData(methodStreamSpec.ClassName); MethodPollingExecStrategyEnum strategy; VariableReader variableReader; String variableName; // Try to resolve the method MethodInfo methodReflection; FastMethod methodFastClass; Type declaringClass; Object invocationTarget; try { if (variableMetaData != null) { variableName = variableMetaData.VariableName; if (variableMetaData.ContextPartitionName != null) { if (contextName == null || !contextName.Equals(variableMetaData.ContextPartitionName)) { throw new ExprValidationException("Variable by name '" + variableMetaData.VariableName + "' has been declared for context '" + variableMetaData.ContextPartitionName + "' and can only be used within the same context"); } strategy = MethodPollingExecStrategyEnum.TARGET_VAR_CONTEXT; variableReader = null; invocationTarget = null; } else { variableReader = variableService.GetReader(methodStreamSpec.ClassName, VariableServiceConstants.NOCONTEXT_AGENTINSTANCEID); if (variableMetaData.IsConstant) { invocationTarget = variableReader.Value; if (invocationTarget is EventBean) { invocationTarget = ((EventBean)invocationTarget).Underlying; } strategy = MethodPollingExecStrategyEnum.TARGET_CONST; } else { invocationTarget = null; strategy = MethodPollingExecStrategyEnum.TARGET_VAR; } } methodReflection = methodResolutionService.ResolveNonStaticMethod(variableMetaData.VariableType, methodStreamSpec.MethodName); } else { methodReflection = methodResolutionService.ResolveMethod(methodStreamSpec.ClassName, methodStreamSpec.MethodName); invocationTarget = null; variableReader = null; variableName = null; strategy = MethodPollingExecStrategyEnum.TARGET_CONST; } declaringClass = methodReflection.DeclaringType; methodFastClass = FastClass.CreateMethod(methodReflection); } catch (ExprValidationException e) { throw; } catch (Exception e) { throw new ExprValidationException(e.Message, e); } // Determine object type returned by method var beanClass = methodFastClass.ReturnType; if ((beanClass == typeof(void)) || (beanClass.IsBuiltinDataType())) { throw new ExprValidationException("Invalid return type for static method '" + methodFastClass.Name + "' of class '" + methodStreamSpec.ClassName + "', expecting a class"); } bool isCollection = false; bool isIterator = false; Type collectionClass = null; Type iteratorClass = null; if (methodFastClass.ReturnType.IsArray) { beanClass = methodFastClass.ReturnType.GetElementType(); } else if (!methodFastClass.ReturnType.IsGenericStringDictionary()) { isCollection = methodFastClass.ReturnType.IsGenericCollection(); if (isCollection) { collectionClass = beanClass.GetGenericType(0); beanClass = collectionClass; } var beanEnumerable = methodFastClass.ReturnType.FindGenericInterface(typeof(IEnumerable <>)); if (beanEnumerable != null) { isIterator = true; iteratorClass = beanEnumerable.GetGenericType(0); beanClass = iteratorClass; } else { var beanEnumerator = methodFastClass.ReturnType.FindGenericInterface(typeof(IEnumerator <>)); if (beanEnumerator != null) { isIterator = true; iteratorClass = beanEnumerator.GetGenericType(0); beanClass = iteratorClass; } } } // If the method returns a Map, look up the map type IDictionary <string, object> mapType = null; String mapTypeName = null; if ((methodFastClass.ReturnType.IsGenericStringDictionary()) || (methodFastClass.ReturnType.IsArray && methodFastClass.ReturnType.GetElementType().IsGenericStringDictionary()) || (methodFastClass.ReturnType.IsGenericCollection() && methodFastClass.ReturnType.GetGenericType(0).IsGenericStringDictionary()) || (methodFastClass.ReturnType.IsGenericEnumerator() && methodFastClass.ReturnType.GetGenericType(0).IsGenericStringDictionary()) || (methodFastClass.ReturnType.IsGenericEnumerable() && methodFastClass.ReturnType.GetGenericType(0).IsGenericStringDictionary())) { var metadata = GetCheckMetadata(methodStreamSpec.MethodName, methodStreamSpec.ClassName, methodResolutionService, typeof(IDictionary <string, object>)); mapTypeName = metadata.TypeName; mapType = (IDictionary <string, object>)metadata.TypeMetadata; } // If the method returns an Object[] or Object[][], look up the type information IDictionary <string, object> oaType = null; String oaTypeName = null; if ((methodFastClass.ReturnType == typeof(object[])) || (methodFastClass.ReturnType == typeof(object[][])) || (methodFastClass.ReturnType.IsGenericCollection() && methodFastClass.ReturnType.GetGenericType(0) == typeof(object[])) || (methodFastClass.ReturnType.IsGenericEnumerator() && methodFastClass.ReturnType.GetGenericType(0) == typeof(object[])) || (methodFastClass.ReturnType.IsGenericEnumerable() && methodFastClass.ReturnType.GetGenericType(0) == typeof(object[]))) { var metadata = GetCheckMetadata(methodStreamSpec.MethodName, methodStreamSpec.ClassName, methodResolutionService, typeof(IDictionary <string, object>)); oaTypeName = metadata.TypeName; oaType = (IDictionary <String, Object>)metadata.TypeMetadata; } // Determine event type from class and method name EventType eventType; if (mapType != null) { eventType = eventAdapterService.AddNestableMapType(mapTypeName, mapType, null, false, true, true, false, false); } else if (oaType != null) { eventType = eventAdapterService.AddNestableObjectArrayType(oaTypeName, oaType, null, false, true, true, false, false, false, null); } else { eventType = eventAdapterService.AddBeanType(beanClass.FullName, beanClass, false, true, true); } // Construct polling strategy as a method invocation var configCache = engineImportService.GetConfigurationMethodRef(declaringClass.FullName); if (configCache == null) { configCache = engineImportService.GetConfigurationMethodRef(declaringClass.FullName); } var dataCacheDesc = configCache != null ? configCache.DataCacheDesc : null; var dataCache = DataCacheFactory.GetDataCache(dataCacheDesc, epStatementAgentInstanceHandle, schedulingService, scheduleBucket); PollExecStrategy methodPollStrategy; if (mapType != null) { if (methodFastClass.ReturnType.IsArray) { methodPollStrategy = new MethodPollingExecStrategyMapArray(eventAdapterService, methodFastClass, eventType, invocationTarget, strategy, variableReader, variableName, variableService); } else if (isCollection) { methodPollStrategy = new MethodPollingExecStrategyMapCollection(eventAdapterService, methodFastClass, eventType, invocationTarget, strategy, variableReader, variableName, variableService); } else if (isIterator) { methodPollStrategy = new MethodPollingExecStrategyMapIterator(eventAdapterService, methodFastClass, eventType, invocationTarget, strategy, variableReader, variableName, variableService); } else { methodPollStrategy = new MethodPollingExecStrategyMapPlain(eventAdapterService, methodFastClass, eventType, invocationTarget, strategy, variableReader, variableName, variableService); } } else if (oaType != null) { if (methodFastClass.ReturnType == typeof(object[][])) { methodPollStrategy = new MethodPollingExecStrategyOAArray(eventAdapterService, methodFastClass, eventType, invocationTarget, strategy, variableReader, variableName, variableService); } else if (isCollection) { methodPollStrategy = new MethodPollingExecStrategyOACollection(eventAdapterService, methodFastClass, eventType, invocationTarget, strategy, variableReader, variableName, variableService); } else if (isIterator) { methodPollStrategy = new MethodPollingExecStrategyOAIterator(eventAdapterService, methodFastClass, eventType, invocationTarget, strategy, variableReader, variableName, variableService); } else { methodPollStrategy = new MethodPollingExecStrategyOAPlain(eventAdapterService, methodFastClass, eventType, invocationTarget, strategy, variableReader, variableName, variableService); } } else { if (methodFastClass.ReturnType.IsArray) { methodPollStrategy = new MethodPollingExecStrategyPOCOArray(eventAdapterService, methodFastClass, eventType, invocationTarget, strategy, variableReader, variableName, variableService); } else if (isCollection) { methodPollStrategy = new MethodPollingExecStrategyPOCOCollection(eventAdapterService, methodFastClass, eventType, invocationTarget, strategy, variableReader, variableName, variableService); } else if (isIterator) { methodPollStrategy = new MethodPollingExecStrategyPOCOIterator(eventAdapterService, methodFastClass, eventType, invocationTarget, strategy, variableReader, variableName, variableService); } else { methodPollStrategy = new MethodPollingExecStrategyPOCOPlain(eventAdapterService, methodFastClass, eventType, invocationTarget, strategy, variableReader, variableName, variableService); } } return(new MethodPollingViewable(variableMetaData == null, methodReflection.DeclaringType, methodStreamSpec, streamNumber, methodStreamSpec.Expressions, methodPollStrategy, dataCache, eventType, exprEvaluatorContext)); }
/// <summary> /// Creates a method-invocation polling view for use as a stream that calls a method, or pulls results from cache. /// </summary> /// <param name="streamNumber">the stream number</param> /// <param name="methodStreamSpec">defines the class and method to call</param> /// <param name="eventAdapterService">for creating event types and events</param> /// <param name="epStatementAgentInstanceHandle">for time-based callbacks</param> /// <param name="engineImportService">for resolving configurations</param> /// <param name="schedulingService">for scheduling callbacks in expiry-time based caches</param> /// <param name="scheduleBucket">for schedules within the statement</param> /// <param name="exprEvaluatorContext">expression evaluation context</param> /// <param name="variableService">variable service</param> /// <param name="statementContext">statement context</param> /// <param name="contextName">context name</param> /// <param name="dataCacheFactory">factory for cache</param> /// <exception cref="ExprValidationException"> /// if the expressions cannot be validated or the method descriptor /// has incorrect class and method names, or parameter number and types don't match /// </exception> /// <returns>pollable view</returns> public static HistoricalEventViewable CreatePollMethodView( int streamNumber, MethodStreamSpec methodStreamSpec, EventAdapterService eventAdapterService, EPStatementAgentInstanceHandle epStatementAgentInstanceHandle, EngineImportService engineImportService, SchedulingService schedulingService, ScheduleBucket scheduleBucket, ExprEvaluatorContext exprEvaluatorContext, VariableService variableService, string contextName, DataCacheFactory dataCacheFactory, StatementContext statementContext) { VariableMetaData variableMetaData = variableService.GetVariableMetaData(methodStreamSpec.ClassName); MethodPollingExecStrategyEnum strategy; VariableReader variableReader = null; string variableName = null; MethodInfo methodReflection = null; object invocationTarget = null; string eventTypeNameProvidedUDFOrScript = null; // see if this is a script in the from-clause ExprNodeScript scriptExpression = null; if (methodStreamSpec.ClassName == null && methodStreamSpec.MethodName != null) { var scriptsByName = statementContext.ExprDeclaredService.GetScriptsByName(methodStreamSpec.MethodName); if (scriptsByName != null) { scriptExpression = ExprDeclaredHelper.GetExistsScript( statementContext.ConfigSnapshot.EngineDefaults.Scripts.DefaultDialect, methodStreamSpec.MethodName, methodStreamSpec.Expressions, scriptsByName, statementContext.ExprDeclaredService); } } try { if (scriptExpression != null) { eventTypeNameProvidedUDFOrScript = scriptExpression.EventTypeNameAnnotation; strategy = MethodPollingExecStrategyEnum.TARGET_SCRIPT; ExprNodeUtility.ValidateSimpleGetSubtree( ExprNodeOrigin.METHODINVJOIN, scriptExpression, statementContext, null, false); } else if (variableMetaData != null) { variableName = variableMetaData.VariableName; if (variableMetaData.ContextPartitionName != null) { if (contextName == null || !contextName.Equals(variableMetaData.ContextPartitionName)) { throw new ExprValidationException( "Variable by name '" + variableMetaData.VariableName + "' has been declared for context '" + variableMetaData.ContextPartitionName + "' and can only be used within the same context"); } strategy = MethodPollingExecStrategyEnum.TARGET_VAR_CONTEXT; variableReader = null; invocationTarget = null; } else { variableReader = variableService.GetReader( methodStreamSpec.ClassName, EPStatementStartMethodConst.DEFAULT_AGENT_INSTANCE_ID); if (variableMetaData.IsConstant) { invocationTarget = variableReader.Value; if (invocationTarget is EventBean) { invocationTarget = ((EventBean)invocationTarget).Underlying; } strategy = MethodPollingExecStrategyEnum.TARGET_CONST; } else { invocationTarget = null; strategy = MethodPollingExecStrategyEnum.TARGET_VAR; } } methodReflection = engineImportService.ResolveNonStaticMethodOverloadChecked( variableMetaData.VariableType, methodStreamSpec.MethodName); } else if (methodStreamSpec.ClassName == null) { // must be either UDF or script Pair <Type, EngineImportSingleRowDesc> udf = null; try { udf = engineImportService.ResolveSingleRow(methodStreamSpec.MethodName); } catch (EngineImportException ex) { throw new ExprValidationException( "Failed to find user-defined function '" + methodStreamSpec.MethodName + "': " + ex.Message, ex); } methodReflection = engineImportService.ResolveMethodOverloadChecked(udf.First, methodStreamSpec.MethodName); invocationTarget = null; variableReader = null; variableName = null; strategy = MethodPollingExecStrategyEnum.TARGET_CONST; eventTypeNameProvidedUDFOrScript = udf.Second.OptionalEventTypeName; } else { methodReflection = engineImportService.ResolveMethodOverloadChecked(methodStreamSpec.ClassName, methodStreamSpec.MethodName); invocationTarget = null; variableReader = null; variableName = null; strategy = MethodPollingExecStrategyEnum.TARGET_CONST; } } catch (ExprValidationException) { throw; } catch (Exception e) { throw new ExprValidationException(e.Message, e); } Type methodProviderClass = null; Type beanClass; IDictionary <string, object> oaType = null; IDictionary <string, object> mapType = null; bool isCollection = false; bool isIterator = false; EventType eventType; EventType eventTypeWhenMethodReturnsEventBeans = null; bool isStaticMethod = false; if (methodReflection != null) { methodProviderClass = methodReflection.DeclaringType; isStaticMethod = variableMetaData == null; // Determine object type returned by method beanClass = methodReflection.ReturnType; if ((beanClass == typeof(void)) || (beanClass.IsBuiltinDataType())) { throw new ExprValidationException( "Invalid return type for static method '" + methodReflection.Name + "' of class '" + methodStreamSpec.ClassName + "', expecting a class"); } if (methodReflection.ReturnType.IsArray && methodReflection.ReturnType.GetElementType() != typeof(EventBean)) { beanClass = methodReflection.ReturnType.GetElementType(); } Type collectionClass = null; Type iteratorClass = null; if (!beanClass.IsGenericDictionary()) { isCollection = beanClass.IsGenericCollection(); if (isCollection) { collectionClass = TypeHelper.GetGenericReturnType(methodReflection, true); beanClass = collectionClass; } isIterator = beanClass.IsGenericEnumerator() && !beanClass.IsGenericDictionary(); if (isIterator) { iteratorClass = TypeHelper.GetGenericReturnType(methodReflection, true); beanClass = iteratorClass; } } // If the method returns a Map, look up the map type string mapTypeName = null; if ((methodReflection.ReturnType.IsGenericStringDictionary()) || (methodReflection.ReturnType.IsArray && methodReflection.ReturnType.GetElementType().IsGenericStringDictionary()) || (isCollection && collectionClass.IsImplementsInterface(typeof(Map))) || (isIterator && iteratorClass.IsImplementsInterface(typeof(Map)))) { MethodMetadataDesc metadata; if (variableMetaData != null) { metadata = GetCheckMetadataVariable( methodStreamSpec.MethodName, variableMetaData, variableReader, engineImportService, typeof(Map)); } else { metadata = GetCheckMetadataNonVariable( methodStreamSpec.MethodName, methodStreamSpec.ClassName, engineImportService, typeof(Map)); } mapTypeName = metadata.TypeName; mapType = (IDictionary <string, object>)metadata.TypeMetadata; } // If the method returns an object[] or object[][], look up the type information string oaTypeName = null; if (methodReflection.ReturnType == typeof(object[]) || methodReflection.ReturnType == typeof(object[][]) || (isCollection && collectionClass == typeof(object[])) || (isIterator && iteratorClass == typeof(object[]))) { MethodMetadataDesc metadata; if (variableMetaData != null) { metadata = GetCheckMetadataVariable( methodStreamSpec.MethodName, variableMetaData, variableReader, engineImportService, typeof(IDictionary <string, object>)); } else { metadata = GetCheckMetadataNonVariable( methodStreamSpec.MethodName, methodStreamSpec.ClassName, engineImportService, typeof(IDictionary <string, object>)); } oaTypeName = metadata.TypeName; oaType = (IDictionary <string, object>)metadata.TypeMetadata; } // Determine event type from class and method name // If the method returns EventBean[], require the event type if ((methodReflection.ReturnType.IsArray && methodReflection.ReturnType.GetElementType() == typeof(EventBean)) || (isCollection && collectionClass == typeof(EventBean)) || (isIterator && iteratorClass == typeof(EventBean))) { string typeName = methodStreamSpec.EventTypeName == null ? eventTypeNameProvidedUDFOrScript : methodStreamSpec.EventTypeName; eventType = EventTypeUtility.RequireEventType( "Method", methodReflection.Name, eventAdapterService, typeName); eventTypeWhenMethodReturnsEventBeans = eventType; } else if (mapType != null) { eventType = eventAdapterService.AddNestableMapType( mapTypeName, mapType, null, false, true, true, false, false); } else if (oaType != null) { eventType = eventAdapterService.AddNestableObjectArrayType( oaTypeName, oaType, null, false, true, true, false, false, false, null); } else { eventType = eventAdapterService.AddBeanType(beanClass.GetDefaultTypeName(), beanClass, false, true, true); } // the @type is only allowed in conjunction with EventBean return types if (methodStreamSpec.EventTypeName != null && eventTypeWhenMethodReturnsEventBeans == null) { throw new ExprValidationException(EventTypeUtility.DisallowedAtTypeMessage()); } } else { string eventTypeName = methodStreamSpec.EventTypeName == null ? scriptExpression.EventTypeNameAnnotation : methodStreamSpec.EventTypeName; eventType = EventTypeUtility.RequireEventType( "Script", scriptExpression.Script.Name, eventAdapterService, eventTypeName); } // get configuration for cache string configName = methodProviderClass != null ? methodProviderClass.FullName : methodStreamSpec.MethodName; ConfigurationMethodRef configCache = engineImportService.GetConfigurationMethodRef(configName); if (configCache == null) { configCache = engineImportService.GetConfigurationMethodRef(configName); } ConfigurationDataCache dataCacheDesc = (configCache != null) ? configCache.DataCacheDesc : null; DataCache dataCache = dataCacheFactory.GetDataCache( dataCacheDesc, statementContext, epStatementAgentInstanceHandle, schedulingService, scheduleBucket, streamNumber); // metadata var meta = new MethodPollingViewableMeta( methodProviderClass, isStaticMethod, mapType, oaType, invocationTarget, strategy, isCollection, isIterator, variableReader, variableName, eventTypeWhenMethodReturnsEventBeans, scriptExpression); return(new MethodPollingViewable(methodStreamSpec, dataCache, eventType, exprEvaluatorContext, meta, statementContext.ThreadLocalManager)); }