@Override
public void processCalculations(final User u, final Entity point, final Value value)
throws NimbitsException {
final List<Entity> calculations =
EntityServiceFactory.getInstance().getEntityByTrigger(u, point, EntityType.calculation);
for (final Entity entity : calculations) {
Calculation c = (Calculation) entity;
try {
final List<Entity> target =
EntityServiceFactory.getInstance().getEntityByKey(u, c.getTarget(), EntityType.point);
if (target.isEmpty()) {
log.severe("Point target was null " + c.getTarget());
log.severe(c.getFormula());
log.severe("trigger: " + c.getTrigger());
disableCalc(u, c);
} else {
log.info("Solving calc" + c.getFormula());
final Value result = solveEquation(u, c);
log.info("result" + result);
ValueServiceFactory.getInstance().recordValue(u, target.get(0), result);
}
} catch (NimbitsException e1) {
LogHelper.logException(this.getClass(), e1);
disableCalc(u, c);
}
}
}
private Point createFeedPoint(final User user) throws NimbitsException {
final EntityName name =
CommonFactoryLocator.getInstance().createName(Const.TEXT_DATA_FEED, EntityType.point);
final Entity entity =
EntityModelFactory.createEntity(
name,
"",
EntityType.feed,
ProtectionLevel.onlyConnection,
user.getKey(),
user.getKey(),
UUID.randomUUID().toString());
// final Entity r = EntityServiceFactory.getInstance().addUpdateEntity(user, entity);
Point point = PointModelFactory.createPointModel(entity);
final Point result = (Point) EntityServiceFactory.getInstance().addUpdateEntity(point);
postToFeed(
user,
"A new data point has been created for your data feed. Your data feed is just "
+ "a data point. Points are capable of storing numbers, text, json and xml data. Nimbits uses "
+ "a single data point to drive this feed.",
FeedType.info);
return result;
}
private Point getFeedPoint(final User user) throws NimbitsException {
final Point point;
final Map<String, Entity> map =
EntityServiceFactory.getInstance().getEntityMap(user, EntityType.feed, 1);
if (map.isEmpty()) {
point = createFeedPoint(user);
} else {
return (Point) map.values().iterator().next();
}
return point;
}
@Override
public Value solveEquation(final User user, final Calculation calculation)
throws NimbitsException {
final MathEvaluator m = new MathEvaluatorImpl(calculation.getFormula());
log.info(calculation.getFormula());
if (!Utils.isEmptyString(calculation.getX()) && calculation.getFormula().contains("x")) {
// Point p = PointServiceFactory.getInstance().getPointByKey(calculation.getX());
final Entity p =
EntityServiceFactory.getInstance()
.getEntityByKey(user, calculation.getX(), EntityType.point)
.get(0);
if (p != null) {
log.info("calc has an x car and i found " + p.getName());
final List<Value> val = ValueServiceFactory.getInstance().getCurrentValue(p);
final double d = val.isEmpty() ? 0.0 : val.get(0).getDoubleValue();
m.addVariable("x", d);
} else {
log.severe("calc has an x car and x not found");
}
}
if (!Utils.isEmptyString(calculation.getY()) && calculation.getFormula().contains("y")) {
final Entity p =
EntityServiceFactory.getInstance()
.getEntityByKey(user, calculation.getY(), EntityType.point)
.get(0);
// Point p = PointServiceFactory.getInstance().getPointByKey(calculation.getY());
if (p != null) {
final List<Value> val = ValueServiceFactory.getInstance().getCurrentValue(p);
final double d = val.isEmpty() ? 0.0 : val.get(0).getDoubleValue();
m.addVariable("y", d);
}
}
if (!Utils.isEmptyString(calculation.getZ()) && calculation.getFormula().contains("z")) {
final Entity p =
EntityServiceFactory.getInstance()
.getEntityByKey(user, calculation.getZ(), EntityType.point)
.get(0);
// Point p = PointServiceFactory.getInstance().getPointByKey(calculation.getZ());
if (p != null) {
final List<Value> val = ValueServiceFactory.getInstance().getCurrentValue(p);
final double d = val.isEmpty() ? 0.0 : val.get(0).getDoubleValue();
m.addVariable("z", d);
}
}
final Double retVal = m.getValue();
if (retVal == null) {
throw new NimbitsException("Formula returned a null value: " + calculation.getFormula());
}
return ValueFactory.createValueModel(retVal, "CV");
}
private static void disableCalc(User u, Trigger c) throws NimbitsException {
c.setEnabled(false);
EntityServiceFactory.getInstance().addUpdateEntity(u, c);
}