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Hi All,
I'm importing on batch old data ( in blocks ), this data it's automatically stored on a Stream ( either Value Stream or Stream ), and I need to do a calculation based on current value and previous value (accumulated consumption counter). I don't have previous value in memory, hence I have to go to the Stream and get previous value, and here the async stream problem arises: if I do too fast the previous value ( which I'm importing in batch "super fast" ) won't be stored on the Stream it's on the write queue.
As I control Data Change event on the property ( accumulated consumption counter ), I would like to execute a delayed Data Change event, there's an easy way to do it? All the ways I think of are too much or I don't like it:
Async Service: void SetTimeout(thing,service,params,milliseconds) {
pause(milliseconds);
Things[thing][service](params);
}
Best Regards,
Carles.
Thingworx supports the pause service
basically
pause(1000) would be pause for 1000 miliseconds.
Hi Pai,
Yes, already it's on my proposals, but the question about using pause(n) it's how will this affect on the threading model... I mean, let's say I import 100k registers in batch, which in turn does 100k SetTimout ( function as shown above ) what will happen to TW?
Best Regards,
Carles.
I'm doing test with the fake SetTimeout function ( which works ) , first limitation: pause(n) it's limited to 60000 milliseconds . Yes I know I can iterate over pause(n) calls, but it's awful.
Hi Carles,
Is there a reason that you are not keeping the previous value you need in memory? Since I do not know the full scope of the transactions I was not sure if the data value was large or some further reason. If you can store the previous value it should eliminate the need to pause?
Thanks,
Adam
Hi All,
This post got lost on the community ( it went to another place instead of Developer Community ).
Just for the record, and if someone has the same needs, or maybe anyone can think on other options...
async function SetTimeout(thing,service,params,milliseconds) {
if (milliseconds>=60000) {
var nTimes = parseInt(milliseconds/60000,10);
for(var i=0;i<nTimes;i++) pause(59999);
// -- As the following instruction doesn't works and it should: case: 12808137
// -- we will just trigger half a minute more
//pause(parseInt(milliseconds%60000,10));
pause(30000);
} else {
pause(milliseconds);
}
if (thing) {
Things[thing][service]((params?JSON.parse(params):null));
} else {
me[service]((params?JSON.parse(params):null));
}
}
Best Regards,
Carles.