public override EPStatementStartResult StartInternal(
EPServicesContext services,
StatementContext statementContext,
bool isNewStatement,
bool isRecoveringStatement,
bool isRecoveringResilient)
{
var expressionName =
services.ExprDeclaredService.AddExpressionOrScript(StatementSpec.CreateExpressionDesc);
// define output event type
var typeName = "EventType_Expression_" + expressionName;
var resultType = services.EventAdapterService.CreateAnonymousMapType(
typeName, Collections.GetEmptyMap <String, Object>(), true);
var stopMethod = new ProxyEPStatementStopMethod(
() =>
{
// no action
});
var destroyMethod = new ProxyEPStatementDestroyMethod(
() => services.ExprDeclaredService.DestroyedExpression(StatementSpec.CreateExpressionDesc));
Viewable resultView = new ZeroDepthStreamNoIterate(resultType);
statementContext.StatementAgentInstanceFactory = new StatementAgentInstanceFactoryNoAgentInstance(resultView);
return(new EPStatementStartResult(resultView, stopMethod, destroyMethod));
}
public override EPStatementStartResult StartInternal(EPServicesContext services, StatementContext statementContext, bool isNewStatement, bool isRecoveringStatement, bool isRecoveringResilient)
{
var createGraphDesc = StatementSpec.CreateGraphDesc;
var agentInstanceContext = GetDefaultAgentInstanceContext(statementContext);
// define output event type
var typeName = "EventType_Graph_" + createGraphDesc.GraphName;
var resultType = services.EventAdapterService.CreateAnonymousMapType(typeName, Collections.GetEmptyMap <String, Object>(), true);
services.DataFlowService.AddStartGraph(createGraphDesc, statementContext, services, agentInstanceContext, isNewStatement);
var stopMethod = new ProxyEPStatementStopMethod(() =>
services.DataFlowService.StopGraph(createGraphDesc.GraphName));
var destroyMethod = new ProxyEPStatementDestroyMethod(() =>
services.DataFlowService.RemoveGraph(createGraphDesc.GraphName));
var resultView = new ZeroDepthStreamNoIterate(resultType);
statementContext.StatementAgentInstanceFactory = new StatementAgentInstanceFactoryNoAgentInstance(resultView);
return(new EPStatementStartResult(resultView, stopMethod, destroyMethod));
}
public ViewableActivationResult Activate(
AgentInstanceContext agentInstanceContext,
bool isSubselect,
bool isRecoveringResilient)
{
FilterValueSetParam[][] addendum = null;
if (agentInstanceContext.AgentInstanceFilterProxy != null) {
addendum = agentInstanceContext.AgentInstanceFilterProxy.GetAddendumFilters(
FilterSpec,
agentInstanceContext);
}
var filterValues = FilterSpec.GetValueSet(
null,
addendum,
agentInstanceContext,
agentInstanceContext.StatementContextFilterEvalEnv);
EventStream theStream;
if (filterValues == null) {
theStream = new ZeroDepthStreamNoIterate(FilterSpec.ResultEventType);
}
else {
if (!agentInstanceContext.AuditProvider.Activated() &&
!agentInstanceContext.InstrumentationProvider.Activated()) {
theStream = CanIterate
? new ZeroDepthStreamIterable(FilterSpec.ResultEventType)
: (EventStream) new ZeroDepthStreamNoIterate(FilterSpec.ResultEventType);
}
else {
var streamNum = StreamNumFromClause ?? -1;
theStream = CanIterate
? new ZeroDepthStreamIterableWAudit(
FilterSpec.ResultEventType,
agentInstanceContext,
FilterSpec,
streamNum,
isSubselect,
SubselectNumber)
: (EventStream) new ZeroDepthStreamNoIterateWAudit(
FilterSpec.ResultEventType,
agentInstanceContext,
FilterSpec,
streamNum,
isSubselect,
SubselectNumber);
}
}
FilterHandleCallback filterCallback;
if (FilterSpec.OptionalPropertyEvaluator == null) {
filterCallback = new ProxyFilterHandleCallback {
ProcMatchFound = (
theEvent,
allStmtMatches) => theStream.Insert(theEvent),
ProcIsSubselect = () => IsSubSelect
};
}
else {
filterCallback = new ProxyFilterHandleCallback {
ProcMatchFound = (
theEvent,
allStmtMatches) => {
var result = FilterSpec.OptionalPropertyEvaluator.GetProperty(theEvent, agentInstanceContext);
if (result == null) {
return;
}
theStream.Insert(result);
},
ProcIsSubselect = () => IsSubSelect
};
}
var filterHandle = new EPStatementHandleCallbackFilter(
agentInstanceContext.EpStatementAgentInstanceHandle,
filterCallback);
if (filterValues != null) {
agentInstanceContext
.StatementContext
.FilterService
.Add(
FilterSpec.FilterForEventType,
filterValues,
filterHandle);
}
ViewableActivatorFilterMgmtCallback stopCallback = new ViewableActivatorFilterMgmtCallback(Container, filterHandle, FilterSpec);
return new ViewableActivationResult(theStream, stopCallback, null, false, false, null, null, null);
}
