I have a stacked sequence which runs 2 different tests continuously. Lets call them test1 and test2. So it's a 2 stage stacked sequence within a while loop. I have a button that says "Start Test1", which jumps into the while loop and executes test1, test2, test1, test2, etc.
I want to add another button that says "Start Test2" which would start test2 first and then test1. So it would basically be changing the order of my stacked sequence to start executing test2 code first instead of test1 code (test2, test1, test2, test1, etc).
Is there an easy way to do this? Thanks for any help!
It has been a while since I used LabVIEW but here goes... I would try to replace the Stacked Sequence with a Case Structure. The Case Structure should have a Test1 case and a Test2 case; it would still be place inside of your while loop.
The input to the Case Structure should be a 1 when you want to run Test1 first (or a 2 to run Test2 first). After Test1 is ran, it would output a 2 by feeding this value back to its input using a Shift Register in the while loop (shown here). Similarly, the Test2 case would output a 1 once it is done and feed this back via the Shift Register.
Per Yair's comment, my suggestion here is a common design pattern known as a State Machine, which, when drawn out, will look like a flow chart of your program. NI's tutorial is written up here which in fact involves a case structure nested within a while loop. Hope it helps!
Related
I am doing a simulation of a production line, which is built through Excel.
Now there is one, which needs free setting of worker shifts for each machine, three shifts in total.
My idea is to create three different Schedules, representing each of the three shifts, and then in the ResourcePool, use the If statement to set up the use of each shift. As shown in the picture enter image description here
But it didn't work. If it is possable, Could you please tell me if there is something wrong with the Java statement or the idea is wrong.
If possible, could you please tell me how to set multiple schedules in ResourcePool?
Additions to the question：
The model is to do the evaluation of the production system and the shift of the workers is an important evaluation parameter. What I want to do is to enter the shift of the workers directly in the Excel sheet and ResourcePool recognizes and uses the corresponding Schedule.
I tried to generate the corresponding Schedule by code, but the Schedule of Resourcepool cannot be set dynamically. So I would like to try to manually input multiple Schedules into the model and then set the corresponding Schedule in ResourcePool by If statement like the image.
Thanks in advance
The first thing you need to know is that the location where you placed the code is a static parameter, thus it is only evaluated once, when the object is created and not checked continuously.
This is indicated by the little popup when you hover over the button that change the entry field from code to value
If it was dynamic it would state Dynamic Value instead of Static Value
Secondly, inside that field you must use a ternary operator, not an if statement, so that the result of the formula is a scheduled object, else you will get a "misplaced construct(s)" error
If you changed the code to
v_Shift == "Shift1" ?
s_Shift1 : v_Shift == "Shift2" ? s_Shift2 : s_Shift3
It will work BUT:
It will only be evaluated when the object is created and not again
Rather not use == on Strings, always use .equals(), on Strings it might work, and sometimes it might not. You can do some research as to why ;-)
Solution: You will have to use a function to change the schedule of the resource pool. Call this function whenever the v_Shift variable changes
I'm trying to clear an array after each iteration of a for loop in LabVIEW, but the way I've implemented it has the values not going directly to what I want, but it changes with previous values in other parts of the array.
It isn't shown, but this code is inside of a for-loop that iterates through another numeric array.
I know that if I get the array to clear properly after each loop iteration, this should work. How do I do that? I'm a beginner at Labview but have been coding for awhile - help is appreciated!!!
[![labview add to array][2]][2]
It looks as if you're not quite used to how LabVIEW passes data around yet. There's no need to use lots of value property nodes for the same control or indicator within one structure; if you want to use the same data in more than one place, just branch the wire. Perhaps you're thinking that a LabVIEW control or indicator is equivalent to a variable in text languages, and you need to use a property node to get or set it. Instead, think of the wire as the variable. If you want to pass the output of one operation to the input of another, just wire the output to the input.
The indicators with terminals inside your loop will be updated with new values every loop iteration, and the code inside the loop should execute faster than a human can read those values, so once the loop has finished all the outputs except the final values will be lost. Is that what you intended, or do you want to accumulate or store them in some way?
I can see that in each loop iteration you're reading two values from a config file, and the section is specified by the string value of one element of the numeric array Array. You're displaying the two values in the indicators PICKERING and SUBUNIT. If you can describe in words (or pseudocode, or a text language you're used to) what manipulation of data you're actually trying to do in the rest of this code, we may be able to make more specific suggestions.
First of all, I'm assuming that the desired order of operations is the following:
Putting the value of Pickering into Array 2
Extracting from Array 2 the values to put in Pickering 1 and Pickering 2
Putting Array 2 back to its original value
If this is the case, with your current code you can't be sure that operation 1 will be executed be fore operation 2. In fact, the order of these operations can't be pre-determined. You must force the dataflow, for example by creating a sequence structure. You will put the code related to 1 in the first frame, then code related to operation 2 in the second.
Then, to put Array 2 back to it's original value I would add a third frame, where you force an empty array into the Value property node of Array 2 (the tool you use for pickering, but as input and not as output).
The sequence structure has to be inside the for loop.
I have never used the property node Reinit to default, so I can't help you with that.
Unfortunately I can't run Labview on this PC but I hope my explanation was clear enough, if not tell me and I will try to be more specific.
I'm trying to figure out how to execute (for example /say hi) when there's Yellow Terracotta in a certain radius or field, however I can't figure out how to do it.
Anyone knows?
Using Minecraft 1.16,
"Execute" command has several syntax options. You can use the form "execute if block run "
Using the proper block name, we can get:
execute if block 1015 63 989 minecraft:yellow_glazed_terracotta run say hi
This targets a specific position.
I am a little less clear on how to achieve specifically what you are asking, but here are my thoughts:
The syntax provides for another form "execute if blocks..." This form allows you to select a range by corners, but it must be compared against a third selection of the exact same size (only the corner can be specified). I think the regions must be exactly the same, and may not allow for random placement of the block anywhere within the region.
Another way might be using different execute if commands instead to select an entity, and test where the entity is standing.
If you put a button on a command block and set it to:
execute at #p if block ~ ~-1 ~ minecraft:yellow_glazed_terracotta run say hi
When the player hits the button on the command block (obviously they must be within range of the button to press it) it shall check if the block -1 under the #p is "yellow_glazed_terracotta", and it will run say hi.
#p can be modified with [distance=..3] which means the player targeted by the command block must be within 3 blocks of the command block:
execute at #p[distance=..3] if block ~ ~-1 ~ minecraft:yellow_glazed_terracotta run say hi
So, this is sort of creating that range that you were looking for.
Some sources use "execute as #a at #s..." as a way to target any player when they step on a certain block anywhere at anytime. It may be possible to modify this into a distance as well, but it seems that the player will need to stand at a specific relative position to the terracotta.
If I find a better way to achieve this, I'll follow up.
The subreddit r/MinecraftCommands has a decent community that messes with Minecraft commands and command blocks. They may have further insight.
If I find a better way to achieve this, I'll follow up.
Edit- The only other thing I can think at this point is to take the first command I suggested and repeat it for every single coordinate in an area. If a terracotta block is any of those spaces, it will run the say hi command.
If you place all of these command lines into a function file you can call for the function when the command block is activated.
in PDI I've got the following structure
0_Metajob
1_Load_1
1_Load_2
1_SimpleEvaluation
1_Mail
As of now
1_Load_1 and 1_Load_2 are independent of each other. The second one will run, irrespective of the success of the first one. That is okay, I want it that way!
Issue
I want to have a counter that is incremented by one every time one of the single loads fails, i.e. in my example the counter can take the values 0, 1 or 2.
What do I need it for? Customer will receive a mail at the end of the metajob. The aforementioned value determines the subject of the mail, i.e. 0=everything fine, 1=so-so, 2=load totally failed!
Why not mailing within every single the Load-Job? I do that but without attaching the log-file because it is usually non-finished. Therefore the log-file is mailed with the mail that is sent when the Metajob is finished.
Tried
"Set a variable". Thought I can simply increment it with adding a one in the value field, i.e. "${VariableName}+1". Of course, this step is implementened within a fail path of each Load-Job.
However, it didn't work.
Would anyone mind helping me? I would appreciate that!
Set Variable doesn't do calculations, you'll need a Javascript step for that.
Fortunately, variables can be also be set within the Javascript step. This bit of code should go into each of the steps you put in place of the Set Variable steps:
var i = parseInt(parent_job.getVariable("Counter"),0);
i = i + 1;
parent_job.setVariable("Counter",i);
true;
This bit of code gets the variable "Counter" from the parent job and converts it to int, since all Pentaho variables are strings. Then it increments it and sets the job variable again. The "true" at the end is to ensure that the javascript step reports success to the main job.
IMPORTANT: This works roughly as you would expect in a Job. It will NOT in a transformation!
I'm using a CSV dataset config element, which is reading from a file like this:
abd
sds
ase
sdd
ssd
cvv
Which, basically, has a number of 3 letter random string.
I'm assigning them to a variable called ${random_3}.
Now, I want to use values from this list multiple times within the same thread, but each time I want to move to next. For example, I want the first sampler to use abd, the 2nd to use sds, then ase, etc. But if I just use ${random_3} then only the first one (abd) is used wherever it's referred to. Is there a way I can specify to loop through the values from the CSV dataset within a thread?
CSV Data Set Config works fine for this. All of the values need to be in one column in the file and assign them to the variable as described.
Create a Thread Group that has as many threads for as many users as you want iterating over the file (i.e. acting on the HTTP Request). Assuming 1 user, set the number of threads to 1, loop count to 1.
Inside the thread group you will need to add a Loop Controller or a While Controller. You indicated that you want to loop through the whole data set. If you add a loop controller you will want to set the Loop Count to 6, since you have 6 values, one for each value. Alternately (and easier for processing the whole file) add a While Controller instead of a Loop Controller and set ${random_3} as the while condition.
It is important to set the CSV Data Set Recycle on EOF and Stop Thread on EOF values correctly. If you plan to iterate over the file more than once you must set "Recycle on EOF" to True (i.e. instruct jMeter to move back to the top of the CSV file). Set "Stop Thread on EOF" to False if you are using a loop controller, true if you are using a while controller and want to stop after reading the whole csv dataset.
Add the CSV Data Set Config as a child of the controller along with the HTTP Request. View the results using any listener you want to use.
CSV data set moves through file only when each thread iteration starts.
You can use Raw Data Source PreProcessor to move throuhg file with each request, that's your solution.
Note that you need to have the values for a given variable name in the same column.
Doing: abd sds ase sdd ssd cvv is very different from
abd
sds
ase
sdd
ssd
cvv
The first has 6 variables with one value each; the second has one variable with 6 values.
Update:
CSV Dataset does not seem to be a suitable too for this purpose.
I ended up creating some simple beanshell scripts that create a random 1, 2, or 3 letter word as needed, and also another one that reads a random words from a large set. This way, each time they are called they give a random value. They are called like this:
${__BeanShell(getRandomStr(3))}
or
${__BeanShell(getRandomWord())