public override EPStatementStartResult StartInternal(EPServicesContext services, StatementContext statementContext, bool isNewStatement, bool isRecoveringStatement, bool isRecoveringResilient)
{
var spec = _statementSpec.CreateIndexDesc;
var namedWindowProcessor = services.NamedWindowMgmtService.GetProcessor(spec.WindowName);
var tableMetadata = services.TableService.GetTableMetadata(spec.WindowName);
if (namedWindowProcessor == null && tableMetadata == null)
{
throw new ExprValidationException("A named window or table by name '" + spec.WindowName + "' does not exist");
}
var indexedEventType = namedWindowProcessor != null ? namedWindowProcessor.NamedWindowType : tableMetadata.InternalEventType;
var infraContextName = namedWindowProcessor != null ? namedWindowProcessor.ContextName : tableMetadata.ContextName;
EPLValidationUtil.ValidateContextName(namedWindowProcessor == null, spec.WindowName, infraContextName, _statementSpec.OptionalContextName, true);
// validate index
var explicitIndexDesc = EventTableIndexUtil.ValidateCompileExplicitIndex(spec.IndexName, spec.IsUnique, spec.Columns, indexedEventType, statementContext);
var advancedIndexDesc = explicitIndexDesc.AdvancedIndexProvisionDesc == null ? null : explicitIndexDesc.AdvancedIndexProvisionDesc.IndexDesc;
var imk = new IndexMultiKey(spec.IsUnique, explicitIndexDesc.HashPropsAsList, explicitIndexDesc.BtreePropsAsList, advancedIndexDesc);
// for tables we add the index to metadata
if (tableMetadata != null)
{
services.TableService.ValidateAddIndex(statementContext.StatementName, tableMetadata, spec.IndexName, explicitIndexDesc, imk);
}
else
{
namedWindowProcessor.ValidateAddIndex(statementContext.StatementName, spec.IndexName, explicitIndexDesc, imk);
}
// allocate context factory
Viewable viewable = new ViewableDefaultImpl(indexedEventType);
var contextFactory = new StatementAgentInstanceFactoryCreateIndex(
services, spec, viewable, namedWindowProcessor,
tableMetadata?.TableName,
_statementSpec.OptionalContextName,
explicitIndexDesc);
statementContext.StatementAgentInstanceFactory = contextFactory;
// provide destroy method which de-registers interest in this index
var finalTableService = services.TableService;
var finalStatementName = statementContext.StatementName;
var destroyMethod = new EPStatementDestroyCallbackList();
if (tableMetadata != null)
{
destroyMethod.AddCallback(() => finalTableService.RemoveIndexReferencesStmtMayRemoveIndex(finalStatementName, tableMetadata));
}
else
{
destroyMethod.AddCallback(() => namedWindowProcessor.RemoveIndexReferencesStmtMayRemoveIndex(imk, finalStatementName));
}
EPStatementStopMethod stopMethod;
if (_statementSpec.OptionalContextName != null)
{
var mergeView = new ContextMergeView(indexedEventType);
var statement = new ContextManagedStatementCreateIndexDesc(_statementSpec, statementContext, mergeView, contextFactory);
services.ContextManagementService.AddStatement(_statementSpec.OptionalContextName, statement, isRecoveringResilient);
stopMethod = new ProxyEPStatementStopMethod(() => {});
var contextManagementService = services.ContextManagementService;
destroyMethod.AddCallback(() => contextManagementService.DestroyedStatement(_statementSpec.OptionalContextName, statementContext.StatementName, statementContext.StatementId));
}
else
{
var defaultAgentInstanceContext = GetDefaultAgentInstanceContext(statementContext);
StatementAgentInstanceFactoryResult result;
try {
result = contextFactory.NewContext(defaultAgentInstanceContext, isRecoveringResilient);
}
catch (EPException ex) {
if (ex.InnerException is ExprValidationException)
{
throw (ExprValidationException)ex.InnerException;
}
destroyMethod.Destroy();
throw;
}
catch (Exception)
{
destroyMethod.Destroy();
throw;
}
var stopCallback = services.EpStatementFactory.MakeStopMethod(result);
stopMethod = new ProxyEPStatementStopMethod(stopCallback.Stop);
if (statementContext.StatementExtensionServicesContext != null && statementContext.StatementExtensionServicesContext.StmtResources != null)
{
var holder = statementContext.StatementExtensionServicesContext.ExtractStatementResourceHolder(result);
statementContext.StatementExtensionServicesContext.StmtResources.Unpartitioned = holder;
statementContext.StatementExtensionServicesContext.PostProcessStart(result, isRecoveringResilient);
}
}
if (tableMetadata != null)
{
services.StatementVariableRefService.AddReferences(statementContext.StatementName, tableMetadata.TableName);
}
else
{
services.StatementVariableRefService.AddReferences(statementContext.StatementName, namedWindowProcessor.NamedWindowType.Name);
}
return(new EPStatementStartResult(viewable, stopMethod, destroyMethod));
}
public override EPStatementStartResult StartInternal(
EPServicesContext services,
StatementContext statementContext,
bool isNewStatement,
bool isRecoveringStatement,
bool isRecoveringResilient)
{
var spec = StatementSpec.CreateIndexDesc;
var namedWindowProcessor = services.NamedWindowService.GetProcessor(spec.WindowName);
var tableMetadata = services.TableService.GetTableMetadata(spec.WindowName);
if (namedWindowProcessor == null && tableMetadata == null)
{
throw new ExprValidationException("A named window or table by name '" + spec.WindowName + "' does not exist");
}
var indexedEventType = namedWindowProcessor != null ? namedWindowProcessor.NamedWindowType : tableMetadata.InternalEventType;
var infraContextName = namedWindowProcessor != null ? namedWindowProcessor.ContextName : tableMetadata.ContextName;
EPLValidationUtil.ValidateContextName(namedWindowProcessor == null, spec.WindowName, infraContextName, StatementSpec.OptionalContextName, true);
// validate index
var validated = EventTableIndexUtil.ValidateCompileExplicitIndex(spec.IsUnique, spec.Columns, indexedEventType);
var imk = new IndexMultiKey(spec.IsUnique, validated.HashProps, validated.BtreeProps);
// for tables we add the index to metadata
if (tableMetadata != null)
{
services.TableService.ValidateAddIndex(statementContext.StatementName, tableMetadata, spec.IndexName, imk);
}
else
{
namedWindowProcessor.ValidateAddIndex(statementContext.StatementName, spec.IndexName, imk);
}
// allocate context factory
Viewable viewable = new ViewableDefaultImpl(indexedEventType);
var contextFactory = new StatementAgentInstanceFactoryCreateIndex(services, spec, viewable, namedWindowProcessor, tableMetadata == null ? null : tableMetadata.TableName);
// provide destroy method which de-registers interest in this index
var finalTableService = services.TableService;
var finalStatementName = statementContext.StatementName;
var destroyMethod = new EPStatementDestroyCallbackList();
if (tableMetadata != null)
{
destroyMethod.AddCallback(() => finalTableService.RemoveIndexReferencesStmtMayRemoveIndex(finalStatementName, tableMetadata));
}
else
{
destroyMethod.AddCallback(() => namedWindowProcessor.RemoveIndexReferencesStmtMayRemoveIndex(imk, finalStatementName));
}
EPStatementStopMethod stopMethod;
if (StatementSpec.OptionalContextName != null)
{
var mergeView = new ContextMergeView(indexedEventType);
var statement = new ContextManagedStatementCreateIndexDesc(StatementSpec, statementContext, mergeView, contextFactory);
services.ContextManagementService.AddStatement(StatementSpec.OptionalContextName, statement, isRecoveringResilient);
stopMethod = () => {};
var contextManagementService = services.ContextManagementService;
destroyMethod.AddCallback(() => contextManagementService.DestroyedStatement(StatementSpec.OptionalContextName, statementContext.StatementName, statementContext.StatementId));
}
else
{
var defaultAgentInstanceContext = GetDefaultAgentInstanceContext(statementContext);
StatementAgentInstanceFactoryCreateIndexResult result;
try {
result = (StatementAgentInstanceFactoryCreateIndexResult)contextFactory.NewContext(defaultAgentInstanceContext, false);
}
catch (EPException ex) {
if (ex.InnerException is ExprValidationException)
{
throw (ExprValidationException)ex.InnerException;
}
throw;
}
var stopCallback = result.StopCallback;
stopMethod = stopCallback.Invoke;
}
return(new EPStatementStartResult(viewable, stopMethod, destroyMethod.Destroy));
}
