This function acts as a wrapper, such that for every real function call, enclosing it with callCache() first checks whether the output of the function call exists in cachePath .
If the file does not exist, it executes the function call and saves the output to cachePath . If the file does exist, it reads the file.
The filename is generated here and the file naming convention is determined by the function name(s) and arguments provided.
cacheCall(fnName, args, pipeName = NULL, cachePath = "", ...)| Argument | Description |
|---|---|
fnName |
the name of the function (any function) being called. |
args |
a list of arguments that will define the filename. |
pipeName |
Can be the name of the parent function or the name of the pipeline if there is one. Can also simply be an ID for a series of functions and files that should be grouped together. Defaults to NULL . |
cachePath |
a character string providing path to the Cache directory. |
... |
arguments that will be passed to fnName call if it is executed. |
the output of the function call, either from a read-in file or from an executed call. If the latter, the corresponding file will also be saved in cachePath .