public void open(DataFlowOpOpenContext openContext) {
FilterValueSet valueSet;
try {
List<ExprNode> filters = Collections.emptyList();
if (filter != null) {
filters = Collections.singletonList(filter);
}
FilterSpecCompiled spec =
FilterSpecCompiler.makeFilterSpec(
eventType,
eventType.getName(),
filters,
null,
null,
null,
new StreamTypeServiceImpl(
eventType, eventType.getName(), true, agentInstanceContext.getEngineURI()),
null,
agentInstanceContext.getStatementContext(),
new ArrayList<Integer>());
valueSet = spec.getValueSet(null, agentInstanceContext, null);
} catch (ExprValidationException ex) {
throw new EPException("Failed to open filter: " + ex.getMessage(), ex);
}
EPStatementAgentInstanceHandle handle =
new EPStatementAgentInstanceHandle(
agentInstanceContext.getStatementContext().getEpStatementHandle(),
agentInstanceContext.getAgentInstanceLock(),
0,
new StatementAgentInstanceFilterVersion());
callbackHandle = new EPStatementHandleCallback(handle, this);
agentInstanceContext.getStatementContext().getFilterService().add(valueSet, callbackHandle);
}
public AggregationService makeService(
AgentInstanceContext agentInstanceContext, MethodResolutionService methodResolutionService) {
AggregationMethod[] aggregatorsAgentInstance =
methodResolutionService.newAggregators(
super.aggregators, agentInstanceContext.getAgentInstanceId());
return new AggSvcGroupAllNoAccessImpl(evaluators, aggregatorsAgentInstance);
}
public synchronized void close(DataFlowOpCloseContext openContext) {
if (callbackHandle != null) {
agentInstanceContext.getStatementContext().getFilterService().remove(callbackHandle);
callbackHandle = null;
}
}
public String getStatementId() {
return agentInstanceContext.getStatementId();
}
public StatementAgentInstanceFactoryOnTriggerResult newContext(
final AgentInstanceContext agentInstanceContext, boolean isRecoveringResilient) {
List<StopCallback> stopCallbacks = new ArrayList<StopCallback>();
View view;
Map<ExprSubselectNode, SubSelectStrategyHolder> subselectStrategies;
AggregationService aggregationService;
EvalRootState optPatternRoot;
Map<ExprTableAccessNode, ExprTableAccessEvalStrategy> tableAccessStrategies;
final ViewableActivationResult activationResult;
try {
if (services.getSchedulableAgentInstanceDirectory() != null) {
services
.getSchedulableAgentInstanceDirectory()
.add(agentInstanceContext.getEpStatementAgentInstanceHandle());
}
OnExprViewResult onExprViewResult = determineOnExprView(agentInstanceContext, stopCallbacks);
view = onExprViewResult.getOnExprView();
aggregationService = onExprViewResult.getOptionalAggregationService();
// attach stream to view
activationResult = activator.activate(agentInstanceContext, false, isRecoveringResilient);
activationResult.getViewable().addView(view);
stopCallbacks.add(activationResult.getStopCallback());
optPatternRoot = activationResult.getOptionalPatternRoot();
// determine final output view
view = determineFinalOutputView(agentInstanceContext, view);
// start subselects
subselectStrategies =
EPStatementStartMethodHelperSubselect.startSubselects(
services, subSelectStrategyCollection, agentInstanceContext, stopCallbacks);
// plan table access
tableAccessStrategies =
EPStatementStartMethodHelperTableAccess.attachTableAccess(
services, agentInstanceContext, statementSpec.getTableNodes());
} catch (RuntimeException ex) {
StopCallback stopCallback =
StatementAgentInstanceUtil.getStopCallback(stopCallbacks, agentInstanceContext);
StatementAgentInstanceUtil.stopSafe(stopCallback, statementContext);
throw ex;
}
StatementAgentInstanceFactoryOnTriggerResult onTriggerResult =
new StatementAgentInstanceFactoryOnTriggerResult(
view,
null,
agentInstanceContext,
aggregationService,
subselectStrategies,
optPatternRoot,
tableAccessStrategies,
activationResult);
if (statementContext.getStatementExtensionServicesContext() != null) {
statementContext
.getStatementExtensionServicesContext()
.contributeStopCallback(onTriggerResult, stopCallbacks);
}
log.debug(".start Statement start completed");
StopCallback stopCallback =
StatementAgentInstanceUtil.getStopCallback(stopCallbacks, agentInstanceContext);
onTriggerResult.setStopCallback(stopCallback);
return onTriggerResult;
}
