firepit - meat added 2x

[sky]

added dung to project (133 grams)
added meat to project (150 grams)

meat (300 grams used of 150 grams needed)
dried dung (133 grams used of 133 grams needed)

ERROR: You need to use -150 grams of meat first.=

and I can't start to cook

[Solutions Maximus]

Cancel the project and start it again?

[Spillages]

Projects cannot be canceled when materials have been added.

[Solutions Maximus]

Oh, yeah, sorry. Completely didn't even think of that.

[marol]

Oh, yeah, sorry. Completely didn't even think of that.

LOL, you didn't work for your nick this time, did you...

[Solutions Maximus]

Um... yeah... that is to... keep people from being... jealous of me...?





And actually, the story behind the nick...

I originally meant to be Solutious Maximus, which I wanted for hidden comical reasons. But, of course, when I mis-typed (don't understand how I mis-typed so horribly, the different keys are on completely different rows) I decided to keep the nick because my dad says I have the solution to everything.

of course, he was being a jerk.

[marol]

When talking about your account details:

Location: 172.0.0.1

Didn't you mean 192.0.0.1?

[Solutions Maximus]

no... actually I meant 127.0.0.1

But, this also has a comedic history.

[sky]

Marol , any ideas?

I'm surprised that more meat can be added than the project calls for..... ....... would have thought there would be a restricting code or check for amount used not allowing more than the project requires to be added, something like:
(Pseudo Code)
If addedmeat > projectmeatgramsrequired then
"project only needs 150 grams"
else if addedmeat < projectmeatgramsrequired then
<add>
elseif addedmeat <1 then
"need to add minimum of 1 gram "
and so on.....

Perhaps there is a check like this and there is another reason for the glitch? First time I've seen more meat added than required.

[marol]

Sky, it seems simple for single user system. But in paralel systems two players can simultaneously use meat on project. So imagine such situation:

1. Player A - script checks if there's room for meat in project - yes, there is - continue.
2. Player B - script checks if there's room for meat in project - yes, there is - continue.
3. Player A - script adds 150 meat to the project.
4. Player B - scrpit adds 150 meat to the project.

See more of this probem here: Wiki - Critial Section.

[sky]

I realize it can be complex.... the 'connection' was slower too so this also may be a factor. I did message Chris the details, should I message you my account details and character?

[marol]

You could have sent the details to me as well... Anyway - I fixed your project.

[sky]

Thanks Marol

[Antacid]

Something like this happened to me once. I was grilling meat with dung, and I added the dung fine, and then added the meat, but when I went to work on it, it said I still needed to add the meat. I checked the project and it said that no meat was used on the project yet, even though in the events page it logged that I had added the meat. There weren't even any other meat grilling projects at that time. I didn't really care, I just added the meat again, since I had a ton, but it was kind of wierd.

[sem]

Sky, it seems simple for single user system. But in paralel systems two players can simultaneously use meat on project. So imagine such situation:

1. Player A - script checks if there's room for meat in project - yes, there is - continue.
2. Player B - script checks if there's room for meat in project - yes, there is - continue.
3. Player A - script adds 150 meat to the project.
4. Player B - scrpit adds 150 meat to the project.

See more of this probem here: Wiki - Critial Section.

Can't you lock the project before step 1? so the flow would become something like

1. Player A script acquires lock on project
2. Player A script checks if there's room for 150 meat in the project
3. Player B script waits on lock
4. Player A script adds 150 meat
5. Player A script releases lock
6. Player B script acquires lock
7. Player B script checks to see whether there's room for 150 meat - there isn't.
8. Player B script releases lock.

Or does the database not support transactions?