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);
}
private static void recursiveCompile(
EvalNode evalNode,
StatementContext context,
Set<String> eventTypeReferences,
boolean isInsertInto,
MatchEventSpec tags,
Deque<Integer> subexpressionIdStack)
throws ExprValidationException {
int counter = 0;
for (EvalNode child : evalNode.getChildNodes()) {
subexpressionIdStack.addLast(counter++);
recursiveCompile(
child, context, eventTypeReferences, isInsertInto, tags, subexpressionIdStack);
subexpressionIdStack.removeLast();
}
LinkedHashMap<String, Pair<EventType, String>> newTaggedEventTypes = null;
LinkedHashMap<String, Pair<EventType, String>> newArrayEventTypes = null;
if (evalNode instanceof EvalFilterNode) {
EvalFilterNode filterNode = (EvalFilterNode) evalNode;
String eventName = filterNode.getRawFilterSpec().getEventTypeName();
EventType resolvedEventType =
FilterStreamSpecRaw.resolveType(
context.getEngineURI(),
eventName,
context.getEventAdapterService(),
context.getPlugInTypeResolutionURIs());
EventType finalEventType = resolvedEventType;
String optionalTag = filterNode.getEventAsName();
boolean isPropertyEvaluation = false;
// obtain property event type, if final event type is properties
if (filterNode.getRawFilterSpec().getOptionalPropertyEvalSpec() != null) {
PropertyEvaluator optionalPropertyEvaluator =
PropertyEvaluatorFactory.makeEvaluator(
filterNode.getRawFilterSpec().getOptionalPropertyEvalSpec(),
resolvedEventType,
filterNode.getEventAsName(),
context.getEventAdapterService(),
context.getMethodResolutionService(),
context.getSchedulingService(),
context.getVariableService(),
context.getEngineURI(),
context.getStatementId(),
context.getStatementName(),
context.getAnnotations(),
subexpressionIdStack);
finalEventType = optionalPropertyEvaluator.getFragmentEventType();
isPropertyEvaluation = true;
}
if (finalEventType instanceof EventTypeSPI) {
eventTypeReferences.add(((EventTypeSPI) finalEventType).getMetadata().getPrimaryName());
}
// If a tag was supplied for the type, the tags must stay with this type, i.e. a=BeanA ->
// b=BeanA -> a=BeanB is a no
if (optionalTag != null) {
Pair<EventType, String> pair = tags.getTaggedEventTypes().get(optionalTag);
EventType existingType = null;
if (pair != null) {
existingType = pair.getFirst();
}
if (existingType == null) {
pair = tags.getArrayEventTypes().get(optionalTag);
if (pair != null) {
throw new ExprValidationException(
"Tag '"
+ optionalTag
+ "' for event '"
+ eventName
+ "' used in the repeat-until operator cannot also appear in other filter expressions");
}
}
if ((existingType != null) && (existingType != finalEventType)) {
throw new ExprValidationException(
"Tag '"
+ optionalTag
+ "' for event '"
+ eventName
+ "' has already been declared for events of type "
+ existingType.getUnderlyingType().getName());
}
pair = new Pair<EventType, String>(finalEventType, eventName);
// add tagged type
if (isPropertyEvaluation) {
newArrayEventTypes = new LinkedHashMap<String, Pair<EventType, String>>();
newArrayEventTypes.put(optionalTag, pair);
} else {
newTaggedEventTypes = new LinkedHashMap<String, Pair<EventType, String>>();
newTaggedEventTypes.put(optionalTag, pair);
}
}
// For this filter, filter types are all known tags at this time,
// and additionally stream 0 (self) is our event type.
// Stream type service allows resolution by property name event if that name appears in other
// tags.
// by defaulting to stream zero.
// Stream zero is always the current event type, all others follow the order of the map
// (stream 1 to N).
String selfStreamName = optionalTag;
if (selfStreamName == null) {
selfStreamName = "s_" + UuidGenerator.generate();
}
LinkedHashMap<String, Pair<EventType, String>> filterTypes =
new LinkedHashMap<String, Pair<EventType, String>>();
Pair<EventType, String> typePair = new Pair<EventType, String>(finalEventType, eventName);
filterTypes.put(selfStreamName, typePair);
filterTypes.putAll(tags.getTaggedEventTypes());
// for the filter, specify all tags used
LinkedHashMap<String, Pair<EventType, String>> filterTaggedEventTypes =
new LinkedHashMap<String, Pair<EventType, String>>(tags.getTaggedEventTypes());
filterTaggedEventTypes.remove(optionalTag);
// handle array tags (match-until clause)
LinkedHashMap<String, Pair<EventType, String>> arrayCompositeEventTypes = null;
if (tags.getArrayEventTypes() != null) {
arrayCompositeEventTypes = new LinkedHashMap<String, Pair<EventType, String>>();
String patternSubexEventType =
getPatternSubexEventType(context.getStatementId(), "pattern", subexpressionIdStack);
EventType arrayTagCompositeEventType =
context
.getEventAdapterService()
.createSemiAnonymousMapType(
patternSubexEventType, new HashMap(), tags.getArrayEventTypes(), isInsertInto);
for (Map.Entry<String, Pair<EventType, String>> entry :
tags.getArrayEventTypes().entrySet()) {
String tag = entry.getKey();
if (!filterTypes.containsKey(tag)) {
Pair<EventType, String> pair =
new Pair<EventType, String>(arrayTagCompositeEventType, tag);
filterTypes.put(tag, pair);
arrayCompositeEventTypes.put(tag, pair);
}
}
}
StreamTypeService streamTypeService =
new StreamTypeServiceImpl(filterTypes, context.getEngineURI(), true, false);
List<ExprNode> exprNodes = filterNode.getRawFilterSpec().getFilterExpressions();
FilterSpecCompiled spec =
FilterSpecCompiler.makeFilterSpec(
resolvedEventType,
eventName,
exprNodes,
filterNode.getRawFilterSpec().getOptionalPropertyEvalSpec(),
filterTaggedEventTypes,
arrayCompositeEventTypes,
streamTypeService,
context.getMethodResolutionService(),
context.getSchedulingService(),
context.getVariableService(),
context.getEventAdapterService(),
context.getEngineURI(),
null,
context,
subexpressionIdStack);
filterNode.setFilterSpec(spec);
} else if (evalNode instanceof EvalObserverNode) {
EvalObserverNode observerNode = (EvalObserverNode) evalNode;
try {
ObserverFactory observerFactory =
context.getPatternResolutionService().create(observerNode.getPatternObserverSpec());
StreamTypeService streamTypeService =
getStreamTypeService(
context.getEngineURI(),
context.getStatementId(),
context.getEventAdapterService(),
tags.taggedEventTypes,
tags.arrayEventTypes,
subexpressionIdStack,
"observer");
ExprValidationContext validationContext =
new ExprValidationContext(
streamTypeService,
context.getMethodResolutionService(),
null,
context.getSchedulingService(),
context.getVariableService(),
context,
context.getEventAdapterService(),
context.getStatementName(),
context.getStatementId(),
context.getAnnotations());
List<ExprNode> validated =
validateExpressions(
observerNode.getPatternObserverSpec().getObjectParameters(), validationContext);
MatchedEventConvertor convertor =
new MatchedEventConvertorImpl(
tags.taggedEventTypes, tags.arrayEventTypes, context.getEventAdapterService());
observerNode.setObserverFactory(observerFactory);
observerFactory.setObserverParameters(validated, convertor);
} catch (ObserverParameterException e) {
throw new ExprValidationException(
"Invalid parameter for pattern observer: " + e.getMessage(), e);
} catch (PatternObjectException e) {
throw new ExprValidationException(
"Failed to resolve pattern observer: " + e.getMessage(), e);
}
} else if (evalNode instanceof EvalGuardNode) {
EvalGuardNode guardNode = (EvalGuardNode) evalNode;
try {
GuardFactory guardFactory =
context.getPatternResolutionService().create(guardNode.getPatternGuardSpec());
StreamTypeService streamTypeService =
getStreamTypeService(
context.getEngineURI(),
context.getStatementId(),
context.getEventAdapterService(),
tags.taggedEventTypes,
tags.arrayEventTypes,
subexpressionIdStack,
"guard");
ExprValidationContext validationContext =
new ExprValidationContext(
streamTypeService,
context.getMethodResolutionService(),
null,
context.getSchedulingService(),
context.getVariableService(),
context,
context.getEventAdapterService(),
context.getStatementName(),
context.getStatementId(),
context.getAnnotations());
List<ExprNode> validated =
validateExpressions(
guardNode.getPatternGuardSpec().getObjectParameters(), validationContext);
MatchedEventConvertor convertor =
new MatchedEventConvertorImpl(
tags.taggedEventTypes, tags.arrayEventTypes, context.getEventAdapterService());
guardNode.setGuardFactory(guardFactory);
guardFactory.setGuardParameters(validated, convertor);
} catch (GuardParameterException e) {
throw new ExprValidationException(
"Invalid parameter for pattern guard: " + e.getMessage(), e);
} catch (PatternObjectException e) {
throw new ExprValidationException("Failed to resolve pattern guard: " + e.getMessage(), e);
}
} else if (evalNode instanceof EvalEveryDistinctNode) {
EvalEveryDistinctNode distinctNode = (EvalEveryDistinctNode) evalNode;
MatchEventSpec matchEventFromChildNodes = analyzeMatchEvent(distinctNode);
StreamTypeService streamTypeService =
getStreamTypeService(
context.getEngineURI(),
context.getStatementId(),
context.getEventAdapterService(),
matchEventFromChildNodes.getTaggedEventTypes(),
matchEventFromChildNodes.getArrayEventTypes(),
subexpressionIdStack,
"every-distinct");
ExprValidationContext validationContext =
new ExprValidationContext(
streamTypeService,
context.getMethodResolutionService(),
null,
context.getSchedulingService(),
context.getVariableService(),
context,
context.getEventAdapterService(),
context.getStatementName(),
context.getStatementId(),
context.getAnnotations());
List<ExprNode> validated;
try {
validated = validateExpressions(distinctNode.getExpressions(), validationContext);
} catch (ExprValidationPropertyException ex) {
throw new ExprValidationPropertyException(
ex.getMessage()
+ ", every-distinct requires that all properties resolve from sub-expressions to the every-distinct",
ex.getCause());
}
MatchedEventConvertor convertor =
new MatchedEventConvertorImpl(
matchEventFromChildNodes.getTaggedEventTypes(),
matchEventFromChildNodes.getArrayEventTypes(),
context.getEventAdapterService());
distinctNode.setConvertor(convertor);
// Determine whether some expressions are constants or time period
List<ExprNode> distinctExpressions = new ArrayList<ExprNode>();
Long msecToExpire = null;
for (ExprNode expr : validated) {
if (expr instanceof ExprTimePeriod) {
Double secondsExpire = (Double) ((ExprTimePeriod) expr).evaluate(null, true, context);
if ((secondsExpire != null) && (secondsExpire > 0)) {
msecToExpire = Math.round(1000d * secondsExpire);
}
log.debug("Setting every-distinct msec-to-expire to " + msecToExpire);
} else if (expr.isConstantResult()) {
log.warn(
"Every-distinct node utilizes an expression returning a constant value, please check expression '"
+ expr.toExpressionString()
+ "', not adding expression to distinct-value expression list");
} else {
distinctExpressions.add(expr);
}
}
if (distinctExpressions.isEmpty()) {
throw new ExprValidationException(
"Every-distinct node requires one or more distinct-value expressions that each return non-constant result values");
}
distinctNode.setExpressions(distinctExpressions, msecToExpire);
} else if (evalNode instanceof EvalMatchUntilNode) {
EvalMatchUntilNode matchUntilNode = (EvalMatchUntilNode) evalNode;
// compile bounds expressions, if any
MatchEventSpec untilMatchEventSpec =
new MatchEventSpec(tags.getTaggedEventTypes(), tags.getArrayEventTypes());
StreamTypeService streamTypeService =
getStreamTypeService(
context.getEngineURI(),
context.getStatementId(),
context.getEventAdapterService(),
untilMatchEventSpec.getTaggedEventTypes(),
untilMatchEventSpec.getArrayEventTypes(),
subexpressionIdStack,
"until");
ExprValidationContext validationContext =
new ExprValidationContext(
streamTypeService,
context.getMethodResolutionService(),
null,
context.getSchedulingService(),
context.getVariableService(),
context,
context.getEventAdapterService(),
context.getStatementName(),
context.getStatementId(),
context.getAnnotations());
String message = "Match-until bounds value expressions must return a numeric value";
if (matchUntilNode.getLowerBounds() != null) {
ExprNode validated =
ExprNodeUtility.getValidatedSubtree(matchUntilNode.getLowerBounds(), validationContext);
matchUntilNode.setLowerBounds(validated);
if ((validated.getExprEvaluator().getType() == null)
|| (!JavaClassHelper.isNumeric(validated.getExprEvaluator().getType()))) {
throw new ExprValidationException(message);
}
}
if (matchUntilNode.getUpperBounds() != null) {
ExprNode validated =
ExprNodeUtility.getValidatedSubtree(matchUntilNode.getUpperBounds(), validationContext);
matchUntilNode.setUpperBounds(validated);
if ((validated.getExprEvaluator().getType() == null)
|| (!JavaClassHelper.isNumeric(validated.getExprEvaluator().getType()))) {
throw new ExprValidationException(message);
}
}
MatchedEventConvertor convertor =
new MatchedEventConvertorImpl(
untilMatchEventSpec.getTaggedEventTypes(),
untilMatchEventSpec.getArrayEventTypes(),
context.getEventAdapterService());
matchUntilNode.setConvertor(convertor);
// compile new tag lists
Set<String> arrayTags = null;
EvalNodeAnalysisResult matchUntilAnalysisResult =
EvalNodeUtil.recursiveAnalyzeChildNodes(matchUntilNode.getChildNodes().get(0));
for (EvalFilterNode filterNode : matchUntilAnalysisResult.getFilterNodes()) {
String optionalTag = filterNode.getEventAsName();
if (optionalTag != null) {
if (arrayTags == null) {
arrayTags = new HashSet<String>();
}
arrayTags.add(optionalTag);
}
}
if (arrayTags != null) {
for (String arrayTag : arrayTags) {
if (!tags.arrayEventTypes.containsKey(arrayTag)) {
tags.arrayEventTypes.put(arrayTag, tags.taggedEventTypes.get(arrayTag));
tags.taggedEventTypes.remove(arrayTag);
}
}
}
matchUntilNode.setTagsArrayedSet(arrayTags);
} else if (evalNode instanceof EvalFollowedByNode) {
EvalFollowedByNode followedByNode = (EvalFollowedByNode) evalNode;
StreamTypeService streamTypeService =
new StreamTypeServiceImpl(context.getEngineURI(), false);
ExprValidationContext validationContext =
new ExprValidationContext(
streamTypeService,
context.getMethodResolutionService(),
null,
context.getSchedulingService(),
context.getVariableService(),
context,
context.getEventAdapterService(),
context.getStatementName(),
context.getStatementId(),
context.getAnnotations());
if (followedByNode.getOptionalMaxExpressions() != null) {
List<ExprNode> validated = new ArrayList<ExprNode>();
for (ExprNode maxExpr : followedByNode.getOptionalMaxExpressions()) {
if (maxExpr == null) {
validated.add(null);
} else {
ExprNodeSummaryVisitor visitor = new ExprNodeSummaryVisitor();
maxExpr.accept(visitor);
if (!visitor.isPlain()) {
String errorMessage =
"Invalid maximum expression in followed-by, "
+ visitor.getMessage()
+ " are not allowed within the expression";
log.error(errorMessage);
throw new ExprValidationException(errorMessage);
}
ExprNode validatedExpr =
ExprNodeUtility.getValidatedSubtree(maxExpr, validationContext);
validated.add(validatedExpr);
if ((validatedExpr.getExprEvaluator().getType() == null)
|| (!JavaClassHelper.isNumeric(validatedExpr.getExprEvaluator().getType()))) {
String message =
"Invalid maximum expression in followed-by, the expression must return an integer value";
throw new ExprValidationException(message);
}
}
}
followedByNode.setOptionalMaxExpressions(validated);
}
}
if (newTaggedEventTypes != null) {
tags.getTaggedEventTypes().putAll(newTaggedEventTypes);
}
if (newArrayEventTypes != null) {
tags.getArrayEventTypes().putAll(newArrayEventTypes);
}
}