use of org.wso2.siddhi.core.executor.ExpressionExecutor in project siddhi by wso2.
the class IndexOperator method update.
private void update(IndexedEventHolder storeEvents, InMemoryCompiledUpdateSet compiledUpdateSet, StateEvent overwritingOrAddingEvent, ComplexEventChunk<StreamEvent> foundEventChunk) {
// for cases when indexed attribute is also updated but that not changed
// to reduce number of passes needed to update the events
boolean doDeleteUpdate = false;
boolean fail = false;
for (Map.Entry<Integer, ExpressionExecutor> entry : compiledUpdateSet.getExpressionExecutorMap().entrySet()) {
if (doDeleteUpdate || fail) {
break;
}
if (storeEvents.isAttributeIndexed(entry.getKey())) {
// Todo how much check we need to do before falling back to Delete and then Update
foundEventChunk.reset();
Set<Object> keys = null;
PrimaryKeyReferenceHolder[] primaryKeyReferenceHolders = storeEvents.getPrimaryKeyReferenceHolders();
if (primaryKeyReferenceHolders != null && primaryKeyReferenceHolders.length == 1 && entry.getKey() == primaryKeyReferenceHolders[0].getPrimaryKeyPosition()) {
keys = new HashSet<>(storeEvents.getAllPrimaryKeyValues());
}
while (foundEventChunk.hasNext()) {
StreamEvent streamEvent = foundEventChunk.next();
Object updatingData = entry.getValue().execute(overwritingOrAddingEvent);
Object storeEventData = streamEvent.getOutputData()[entry.getKey()];
if (updatingData != null && storeEventData != null && !updatingData.equals(storeEventData)) {
doDeleteUpdate = true;
if (keys == null || keys.size() == 0) {
break;
} else {
keys.remove(storeEventData);
if (!keys.add(updatingData)) {
log.error("Update failed for event :" + overwritingOrAddingEvent + ", as there is " + "already an event stored with primary key '" + updatingData + "' at '" + queryName + "'");
fail = true;
break;
}
}
}
}
}
}
foundEventChunk.reset();
if (!fail) {
if (doDeleteUpdate) {
collectionExecutor.delete(overwritingOrAddingEvent, storeEvents);
ComplexEventChunk<StreamEvent> toUpdateEventChunk = new ComplexEventChunk<StreamEvent>(false);
while (foundEventChunk.hasNext()) {
StreamEvent streamEvent = foundEventChunk.next();
foundEventChunk.remove();
// to make the chained state back to normal
streamEvent.setNext(null);
for (Map.Entry<Integer, ExpressionExecutor> entry : compiledUpdateSet.getExpressionExecutorMap().entrySet()) {
streamEvent.setOutputData(entry.getValue().execute(overwritingOrAddingEvent), entry.getKey());
}
toUpdateEventChunk.add(streamEvent);
}
storeEvents.add(toUpdateEventChunk);
} else {
while (foundEventChunk.hasNext()) {
StreamEvent streamEvent = foundEventChunk.next();
// to make the chained state back to normal
streamEvent.setNext(null);
for (Map.Entry<Integer, ExpressionExecutor> entry : compiledUpdateSet.getExpressionExecutorMap().entrySet()) {
streamEvent.setOutputData(entry.getValue().execute(overwritingOrAddingEvent), entry.getKey());
}
}
}
}
}
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