Read sharedObject in another session using $dataId

[stemangiola]

Hello, thanks for this package.

I would like to use SharedObject with Targets. In order to do that, I would like to

• open a R session A
• do x <- share(1)
• check x$dataId as file
• Open a new session B
• read dataId from file
• read x from memory as loadSharedObjectFromDataId(dataId)

Is this possible?

[Jiefei-Wang]

Hi,

I guess you are trying to share the ID of an R object through the filesystem. Is it correct? If so, I think there is a simple way to do it, you do not have to explicitly know the ID of the shared object. All you need to do is to save the object to a file like a regular object, only the ID of the shared object will be saved.

In R session A

library(SharedObject)
x <- share(1:10)
file <- tempfile()
saveRDS(x, file)

In R session B (assume you still have R session A running, otherwise the data of the shared object might be deleted)

library(SharedObject)
# Replace this path with your path
x <- readRDS("C:\\Users\\jiewang\\AppData\\Local\\Temp\\RtmpSmudfO\\file135c1ed7a2e")
x

output in R session B

> x
 [1]  1  2  3  4  5  6  7  8  9 10

Does this solve your problem? Feel free to let me know if you have more questions

Jiefei

[stemangiola]

@susansjy22 in this way we don't have to save the whole file and load it back into Targets