private static void ValidateThenSetAssignments(
IList<OnTriggerSetAssignment> assignments,
ExprValidationContext validationContext,
bool allowRHSAggregation)
{
if (assignments == null || assignments.IsEmpty()) {
return;
}
foreach (var assign in assignments) {
ExprNodeUtilityValidate.ValidateAssignment(true, ExprNodeOrigin.UPDATEASSIGN, assign, validationContext);
}
}
protected override void InitExec(
string aliasName,
StatementSpecCompiled spec,
StatementRawInfo statementRawInfo,
StatementCompileTimeServices services)
{
StreamTypeServiceImpl assignmentTypeService = new StreamTypeServiceImpl(
new EventType[] {
processor.EventTypeRspInputEvents, null,
processor.EventTypeRspInputEvents
},
new string[] {aliasName, "", INITIAL_VALUE_STREAM_NAME},
new bool[] {true, true, true},
true,
false);
assignmentTypeService.IsStreamZeroUnambigous = true;
ExprValidationContext validationContext =
new ExprValidationContextBuilder(assignmentTypeService, statementRawInfo, services)
.WithAllowBindingConsumption(true)
.Build();
// validate update expressions
FireAndForgetSpecUpdate updateSpec = (FireAndForgetSpecUpdate) spec.Raw.FireAndForgetSpec;
try {
foreach (OnTriggerSetAssignment assignment in updateSpec.Assignments) {
ExprNodeUtilityValidate.ValidateAssignment(
false, ExprNodeOrigin.UPDATEASSIGN, assignment, validationContext);
}
}
catch (ExprValidationException e) {
throw new EPException(e.Message, e);
}
// make updater
try {
bool copyOnWrite = processor is FireAndForgetProcessorNamedWindowForge;
updateHelper = EventBeanUpdateHelperForgeFactory.Make(
processor.NamedWindowOrTableName,
(EventTypeSPI) processor.EventTypeRspInputEvents,
updateSpec.Assignments,
aliasName,
null,
copyOnWrite,
statementRawInfo.StatementName,
services.EventTypeAvroHandler);
}
catch (ExprValidationException e) {
throw new EPException(e.Message, e);
}
}
public StmtForgeMethodResult Make(
string @namespace,
string classPostfix,
StatementCompileTimeServices services)
{
var statementSpec = _base.StatementSpec;
// determine context
var contextName = _base.StatementSpec.Raw.OptionalContextName;
if (contextName != null) {
throw new ExprValidationException("Update IStream is not supported in conjunction with a context");
}
var streamSpec = statementSpec.StreamSpecs[0];
var updateSpec = statementSpec.Raw.UpdateDesc;
string triggereventTypeName;
EventType streamEventType;
List<StmtClassForgeableFactory> additionalForgeables = new List<StmtClassForgeableFactory>();
if (streamSpec is FilterStreamSpecCompiled) {
var filterStreamSpec = (FilterStreamSpecCompiled) streamSpec;
triggereventTypeName = filterStreamSpec.FilterSpecCompiled.FilterForEventTypeName;
streamEventType = filterStreamSpec.FilterSpecCompiled.FilterForEventType;
}
else if (streamSpec is NamedWindowConsumerStreamSpec) {
var namedSpec = (NamedWindowConsumerStreamSpec) streamSpec;
streamEventType = namedSpec.NamedWindow.EventType;
triggereventTypeName = streamEventType.Name;
}
else if (streamSpec is TableQueryStreamSpec) {
throw new ExprValidationException("Tables cannot be used in an update-istream statement");
}
else {
throw new ExprValidationException("Unknown stream specification streamEventType: " + streamSpec);
}
// determine a stream name
var streamName = triggereventTypeName;
if (updateSpec.OptionalStreamName != null) {
streamName = updateSpec.OptionalStreamName;
}
StreamTypeService typeService = new StreamTypeServiceImpl(
new[] {streamEventType},
new[] {streamName},
new[] {true},
false,
false);
// create subselect information
IList<FilterSpecCompiled> filterSpecCompileds = new List<FilterSpecCompiled>();
IList<NamedWindowConsumerStreamSpec> namedWindowConsumers = new List<NamedWindowConsumerStreamSpec>();
SubSelectActivationDesc subSelectActivationDesc = SubSelectHelperActivations.CreateSubSelectActivation(
filterSpecCompileds, namedWindowConsumers, _base, services);
additionalForgeables.AddAll(subSelectActivationDesc.AdditionalForgeables);
IDictionary<ExprSubselectNode, SubSelectActivationPlan> subselectActivation = subSelectActivationDesc.Subselects;
// handle subselects
SubSelectHelperForgePlan subSelectForgePlan = SubSelectHelperForgePlanner.PlanSubSelect(
_base, subselectActivation, typeService.StreamNames, typeService.EventTypes, new String[]{triggereventTypeName}, services);
IDictionary<ExprSubselectNode, SubSelectFactoryForge> subselectForges = subSelectForgePlan.Subselects;
additionalForgeables.AddAll(subSelectForgePlan.AdditionalForgeables);
var validationContext =
new ExprValidationContextBuilder(typeService, _base.StatementRawInfo, services).Build();
foreach (var assignment in updateSpec.Assignments) {
ExprNodeUtilityValidate.ValidateAssignment(
false, ExprNodeOrigin.UPDATEASSIGN, assignment, validationContext);
}
if (updateSpec.OptionalWhereClause != null) {
var validated = ExprNodeUtilityValidate.GetValidatedSubtree(
ExprNodeOrigin.WHERE,
updateSpec.OptionalWhereClause,
validationContext);
updateSpec.OptionalWhereClause = validated;
EPStatementStartMethodHelperValidate.ValidateNoAggregations(
validated,
"Aggregation functions may not be used within an update-clause");
}
// build route information
var routerDesc = InternalEventRouterDescFactory.GetValidatePreprocessing(
streamEventType,
updateSpec,
_base.StatementRawInfo.Annotations);
var statementFieldsClassName =
CodeGenerationIDGenerator.GenerateClassNameSimple(typeof(StatementFields), classPostfix);
var namespaceScope = new CodegenNamespaceScope(
@namespace,
statementFieldsClassName,
services.IsInstrumented);
var aiFactoryProviderClassName = CodeGenerationIDGenerator.GenerateClassNameSimple(
typeof(StatementAIFactoryProvider),
classPostfix);
var forge = new StatementAgentInstanceFactoryUpdateForge(routerDesc, subselectForges);
var aiFactoryForgeable = new StmtClassForgeableAIFactoryProviderUpdate(
aiFactoryProviderClassName,
namespaceScope,
forge);
var selectSubscriberDescriptor = new SelectSubscriberDescriptor(
new[] {streamEventType.UnderlyingType},
new[] {"*"},
false,
null,
null);
var informationals = StatementInformationalsUtil.GetInformationals(
_base,
filterSpecCompileds,
Collections.GetEmptyList<ScheduleHandleCallbackProvider>(),
Collections.GetEmptyList<NamedWindowConsumerStreamSpec>(),
false,
selectSubscriberDescriptor,
namespaceScope,
services);
var statementProviderClassName =
CodeGenerationIDGenerator.GenerateClassNameSimple(typeof(StatementProvider), classPostfix);
var stmtProvider = new StmtClassForgeableStmtProvider(
aiFactoryProviderClassName,
statementProviderClassName,
informationals,
namespaceScope);
IList<StmtClassForgeable> forgeables = new List<StmtClassForgeable>();
additionalForgeables.ForEach(_ => forgeables.Add(_.Make(namespaceScope, classPostfix)));
forgeables.Add(aiFactoryForgeable);
forgeables.Add(stmtProvider);
forgeables.Add(new StmtClassForgeableStmtFields(statementFieldsClassName, namespaceScope, 0));
return new StmtForgeMethodResult(
forgeables,
filterSpecCompileds,
Collections.GetEmptyList<ScheduleHandleCallbackProvider>(),
namedWindowConsumers,
Collections.GetEmptyList<FilterSpecParamExprNodeForge>());
}
public static OnTriggerPlanValidationResult ValidateOnTriggerPlan(
EventType namedWindowOrTableType,
OnTriggerWindowDesc onTriggerDesc,
StreamSpecCompiled streamSpec,
OnTriggerActivatorDesc activatorResult,
IDictionary<ExprSubselectNode, SubSelectActivationPlan> subselectActivation,
StatementBaseInfo @base,
StatementCompileTimeServices services)
{
var zeroStreamAliasName = onTriggerDesc.OptionalAsName;
if (zeroStreamAliasName == null) {
zeroStreamAliasName = "stream_0";
}
var streamName = streamSpec.OptionalStreamName;
if (streamName == null) {
streamName = "stream_1";
}
var namedWindowTypeName = onTriggerDesc.WindowName;
var additionalForgeables = new List<StmtClassForgeableFactory>();
// Materialize sub-select views
// 0 - named window stream
// 1 - arriving stream
// 2 - initial value before update
string[] subselectStreamNames = {zeroStreamAliasName, streamSpec.OptionalStreamName};
EventType[] subselectEventTypes = {namedWindowOrTableType, activatorResult.ActivatorResultEventType};
string[] subselectEventTypeNames = {namedWindowTypeName, activatorResult.TriggerEventTypeName};
var subselectForgePlan = SubSelectHelperForgePlanner.PlanSubSelect(
@base,
subselectActivation,
subselectStreamNames,
subselectEventTypes,
subselectEventTypeNames,
services);
IDictionary<ExprSubselectNode, SubSelectFactoryForge> subselectForges = subselectForgePlan.Subselects;
additionalForgeables.AddAll(subselectForgePlan.AdditionalForgeables);
var typeService = new StreamTypeServiceImpl(
new[] {namedWindowOrTableType, activatorResult.ActivatorResultEventType},
new[] {zeroStreamAliasName, streamName},
new[] {false, true},
true,
false);
// allow "initial" as a prefix to properties
StreamTypeServiceImpl assignmentTypeService;
if (zeroStreamAliasName.Equals(INITIAL_VALUE_STREAM_NAME) || streamName.Equals(INITIAL_VALUE_STREAM_NAME)) {
assignmentTypeService = typeService;
}
else {
assignmentTypeService = new StreamTypeServiceImpl(
new[] {namedWindowOrTableType, activatorResult.ActivatorResultEventType, namedWindowOrTableType},
new[] {zeroStreamAliasName, streamName, INITIAL_VALUE_STREAM_NAME},
new[] {false, true, true},
false,
false);
assignmentTypeService.IsStreamZeroUnambigous = true;
}
if (onTriggerDesc is OnTriggerWindowUpdateDesc) {
var updateDesc = (OnTriggerWindowUpdateDesc) onTriggerDesc;
var validationContext = new ExprValidationContextBuilder(
assignmentTypeService,
@base.StatementRawInfo,
services)
.WithAllowBindingConsumption(true)
.Build();
foreach (var assignment in updateDesc.Assignments) {
ExprNodeUtilityValidate.ValidateAssignment(false, ExprNodeOrigin.UPDATEASSIGN, assignment, validationContext);
}
}
if (onTriggerDesc is OnTriggerMergeDesc) {
var mergeDesc = (OnTriggerMergeDesc) onTriggerDesc;
ValidateMergeDesc(
mergeDesc,
namedWindowOrTableType,
zeroStreamAliasName,
activatorResult.ActivatorResultEventType,
streamName,
@base.StatementRawInfo,
services);
}
// validate join expression
var validatedJoin = ValidateJoinNamedWindow(
ExprNodeOrigin.WHERE,
@base.StatementSpec.Raw.WhereClause,
namedWindowOrTableType,
zeroStreamAliasName,
namedWindowTypeName,
activatorResult.ActivatorResultEventType,
streamName,
activatorResult.TriggerEventTypeName,
null,
@base.StatementRawInfo,
services);
// validate filter, output rate limiting
EPStatementStartMethodHelperValidate.ValidateNodes(
@base.StatementSpec.Raw,
typeService,
null,
@base.StatementRawInfo,
services);
// Construct a processor for results; for use in on-select to process selection results
// Use a wildcard select if the select-clause is empty, such as for on-delete.
// For on-select the select clause is not empty.
if (@base.StatementSpec.SelectClauseCompiled.SelectExprList.Length == 0) {
@base.StatementSpec.SelectClauseCompiled.WithSelectExprList(new SelectClauseElementWildcard());
}
var resultSetProcessorPrototype = ResultSetProcessorFactoryFactory.GetProcessorPrototype(
new ResultSetSpec(@base.StatementSpec),
typeService,
null,
new bool[0],
true,
@base.ContextPropertyRegistry,
false,
true,
@base.StatementRawInfo,
services);
additionalForgeables.AddAll(resultSetProcessorPrototype.AdditionalForgeables);
// plan table access
var tableAccessForges = ExprTableEvalHelperPlan.PlanTableAccess(@base.StatementSpec.TableAccessNodes);
return new OnTriggerPlanValidationResult(
subselectForges,
tableAccessForges,
resultSetProcessorPrototype,
validatedJoin,
zeroStreamAliasName,
additionalForgeables);
}
private static void ValidateMergeDesc(
OnTriggerMergeDesc mergeDesc,
EventType namedWindowType,
string namedWindowName,
EventType triggerStreamType,
string triggerStreamName,
StatementRawInfo statementRawInfo,
StatementCompileTimeServices services)
{
var exprNodeErrorMessage = "Aggregation functions may not be used within an merge-clause";
var dummyTypeNoPropertiesMeta = new EventTypeMetadata(
"merge_named_window_insert",
statementRawInfo.ModuleName,
EventTypeTypeClass.STREAM,
EventTypeApplicationType.MAP,
NameAccessModifier.TRANSIENT,
EventTypeBusModifier.NONBUS,
false,
EventTypeIdPair.Unassigned());
EventType dummyTypeNoProperties = BaseNestableEventUtil.MakeMapTypeCompileTime(
dummyTypeNoPropertiesMeta,
Collections.GetEmptyMap<string, object>(),
null,
null,
null,
null,
services.BeanEventTypeFactoryPrivate,
services.EventTypeCompileTimeResolver);
StreamTypeService insertOnlyTypeSvc = new StreamTypeServiceImpl(
new[] {dummyTypeNoProperties, triggerStreamType},
new[] {UuidGenerator.Generate(), triggerStreamName},
new[] {true, true},
true,
false);
var twoStreamTypeSvc = new StreamTypeServiceImpl(
new[] {namedWindowType, triggerStreamType},
new[] {namedWindowName, triggerStreamName},
new[] {true, true},
true,
false);
foreach (var matchedItem in mergeDesc.Items) {
// we may provide an additional stream "initial" for the prior value, unless already defined
StreamTypeServiceImpl assignmentStreamTypeSvc;
if (namedWindowName.Equals(INITIAL_VALUE_STREAM_NAME) ||
triggerStreamName.Equals(INITIAL_VALUE_STREAM_NAME)) {
assignmentStreamTypeSvc = twoStreamTypeSvc;
}
else {
assignmentStreamTypeSvc = new StreamTypeServiceImpl(
new[] {namedWindowType, triggerStreamType, namedWindowType},
new[] {namedWindowName, triggerStreamName, INITIAL_VALUE_STREAM_NAME},
new[] {true, true, true},
false,
false);
assignmentStreamTypeSvc.IsStreamZeroUnambigous = true;
}
if (matchedItem.OptionalMatchCond != null) {
var matchValidStreams = matchedItem.IsMatchedUnmatched ? twoStreamTypeSvc : insertOnlyTypeSvc;
matchedItem.OptionalMatchCond = EPStatementStartMethodHelperValidate.ValidateExprNoAgg(
ExprNodeOrigin.MERGEMATCHCOND,
matchedItem.OptionalMatchCond,
matchValidStreams,
exprNodeErrorMessage,
true,
false,
statementRawInfo,
services);
if (!matchedItem.IsMatchedUnmatched) {
EPStatementStartMethodHelperValidate.ValidateSubqueryExcludeOuterStream(
matchedItem.OptionalMatchCond);
}
}
foreach (var item in matchedItem.Actions) {
if (item is OnTriggerMergeActionDelete) {
var delete = (OnTriggerMergeActionDelete) item;
if (delete.OptionalWhereClause != null) {
delete.OptionalWhereClause = EPStatementStartMethodHelperValidate.ValidateExprNoAgg(
ExprNodeOrigin.MERGEMATCHWHERE,
delete.OptionalWhereClause,
twoStreamTypeSvc,
exprNodeErrorMessage,
true,
false,
statementRawInfo,
services);
}
}
else if (item is OnTriggerMergeActionUpdate) {
var update = (OnTriggerMergeActionUpdate) item;
if (update.OptionalWhereClause != null) {
update.OptionalWhereClause = EPStatementStartMethodHelperValidate.ValidateExprNoAgg(
ExprNodeOrigin.MERGEMATCHWHERE,
update.OptionalWhereClause,
twoStreamTypeSvc,
exprNodeErrorMessage,
true,
false,
statementRawInfo,
services);
}
foreach (var assignment in update.Assignments) {
var validationContext = new ExprValidationContextBuilder(assignmentStreamTypeSvc, statementRawInfo, services)
.WithAllowBindingConsumption(true)
.WithAllowTableAggReset(true)
.Build();
ExprNodeUtilityValidate.ValidateAssignment(false, ExprNodeOrigin.UPDATEASSIGN, assignment, validationContext);
}
}
else if (item is OnTriggerMergeActionInsert) {
var insert = (OnTriggerMergeActionInsert) item;
var insertTypeSvc = GetInsertStreamService(
insert.OptionalStreamName,
namedWindowName,
insertOnlyTypeSvc,
twoStreamTypeSvc);
if (insert.OptionalWhereClause != null) {
insert.OptionalWhereClause = EPStatementStartMethodHelperValidate.ValidateExprNoAgg(
ExprNodeOrigin.MERGEMATCHWHERE,
insert.OptionalWhereClause,
insertTypeSvc,
exprNodeErrorMessage,
true,
false,
statementRawInfo,
services);
}
var compiledSelect = ValidateInsertSelect(
insert.SelectClause,
insertTypeSvc,
insert.Columns,
statementRawInfo,
services);
insert.SelectClauseCompiled = compiledSelect;
}
else {
throw new ArgumentException("Unrecognized merge item '" + item.GetType().Name + "'");
}
}
}
if (mergeDesc.OptionalInsertNoMatch != null) {
var insertTypeSvc = GetInsertStreamService(
mergeDesc.OptionalInsertNoMatch.OptionalStreamName,
namedWindowName,
insertOnlyTypeSvc,
twoStreamTypeSvc);
var compiledSelect = ValidateInsertSelect(
mergeDesc.OptionalInsertNoMatch.SelectClause,
insertTypeSvc,
mergeDesc.OptionalInsertNoMatch.Columns,
statementRawInfo,
services);
mergeDesc.OptionalInsertNoMatch.SelectClauseCompiled = compiledSelect;
}
}
public static OnTriggerSetPlan HandleSetVariable(
string className,
CodegenNamespaceScope namespaceScope,
string classPostfix,
OnTriggerActivatorDesc activatorResult,
string optionalStreamName,
IDictionary<ExprSubselectNode, SubSelectActivationPlan> subselectActivation,
OnTriggerSetDesc desc,
StatementBaseInfo @base,
StatementCompileTimeServices services)
{
StreamTypeService typeService = new StreamTypeServiceImpl(
new[] {activatorResult.ActivatorResultEventType},
new[] {optionalStreamName},
new[] {true},
false,
false);
var validationContext = new ExprValidationContextBuilder(typeService, @base.StatementRawInfo, services)
.WithAllowBindingConsumption(true)
.Build();
// handle subselects
SubSelectHelperForgePlan subSelectForgePlan = SubSelectHelperForgePlanner.PlanSubSelect(
@base,
subselectActivation,
new string[] {optionalStreamName},
new EventType[] {activatorResult.ActivatorResultEventType},
new string[] {activatorResult.TriggerEventTypeName},
services);
IDictionary<ExprSubselectNode, SubSelectFactoryForge> subselectForges = subSelectForgePlan.Subselects;
// validate assignments
foreach (var assignment in desc.Assignments) {
ExprNodeUtilityValidate.ValidateAssignment(true, ExprNodeOrigin.UPDATEASSIGN, assignment, validationContext);
}
// create read-write logic
VariableReadWritePackageForge variableReadWritePackageForge = new VariableReadWritePackageForge(
desc.Assignments, @base.StatementName, services);
// plan table access
var tableAccessForges = ExprTableEvalHelperPlan.PlanTableAccess(@base.StatementSpec.TableAccessNodes);
// create output event type
var eventTypeName = services.EventTypeNameGeneratorStatement.AnonymousTypeName;
var eventTypeMetadata = new EventTypeMetadata(
eventTypeName,
@base.ModuleName,
EventTypeTypeClass.STATEMENTOUT,
EventTypeApplicationType.MAP,
NameAccessModifier.TRANSIENT,
EventTypeBusModifier.NONBUS,
false,
EventTypeIdPair.Unassigned());
var eventType = BaseNestableEventUtil.MakeMapTypeCompileTime(
eventTypeMetadata,
variableReadWritePackageForge.VariableTypes,
null,
null,
null,
null,
services.BeanEventTypeFactoryPrivate,
services.EventTypeCompileTimeResolver);
services.EventTypeCompileTimeRegistry.NewType(eventType);
// Handle output format
var defaultSelectAllSpec = new StatementSpecCompiled();
defaultSelectAllSpec.SelectClauseCompiled.WithSelectExprList(new SelectClauseElementWildcard());
defaultSelectAllSpec.Raw.SelectStreamDirEnum = SelectClauseStreamSelectorEnum.RSTREAM_ISTREAM_BOTH;
StreamTypeService streamTypeService = new StreamTypeServiceImpl(
new EventType[] {eventType},
new[] {"trigger_stream"},
new[] {true},
false,
false);
var resultSetProcessor = ResultSetProcessorFactoryFactory.GetProcessorPrototype(
new ResultSetSpec(defaultSelectAllSpec),
streamTypeService,
null,
new bool[1],
false,
@base.ContextPropertyRegistry,
false,
false,
@base.StatementRawInfo,
services);
var classNameRSP = CodeGenerationIDGenerator.GenerateClassNameSimple(
typeof(ResultSetProcessorFactoryProvider),
classPostfix);
var forge = new StatementAgentInstanceFactoryOnTriggerSetForge(
activatorResult.Activator,
eventType,
subselectForges,
tableAccessForges,
variableReadWritePackageForge,
classNameRSP);
var forgeables = new List<StmtClassForgeable>();
forgeables.Add(new StmtClassForgeableRSPFactoryProvider(classNameRSP, resultSetProcessor, namespaceScope, @base.StatementRawInfo));
var onTrigger = new StmtClassForgeableAIFactoryProviderOnTrigger(className, namespaceScope, forge);
return new OnTriggerSetPlan(
onTrigger,
forgeables,
resultSetProcessor.SelectSubscriberDescriptor,
subSelectForgePlan.AdditionalForgeables);
}