publishService: Publishes a R code block or a Realtime model as a new web service.

Articolo
07/15/2019

Applies to version 1.1.3 of package mrsdeploy.

##Description

Publishes a R code block or a Realtime model as a new web service running on R Server.

Usage

  publishService(name, code, model = NULL, snapshot = NULL, inputs = list(),
    outputs = list(), artifacts = c(), v = character(0), alias = NULL,
    destination = NULL, descr = NULL, serviceType = c("Script", "Realtime"))

Arguments

`name`

A string representing the web service name. Use quotes such as "MyService". We recommend a name that is easily understood and remembered.

`code`

Required for standard web services. The R code to publish. If you use a path, the base path is your local current working directory. code can take the form of:

A function handle such as code = function(hp, wt) { newdata <- data.frame(hp = hp, wt = wt) predict(model, newdata, type = "response") }
A block of arbitrary R code as a character string such ascode = "result <- x + y"
A filepath to a local .R file containing R code such as code = "/path/to/R/script.R" If serviceType is 'Realtime', code has to be NULL.

`model`

(optional) For standard web services, an object or a filepath to an external representation of R objects to be loaded and used with code. The specified file can be:

Filepath to a local .RData file holding R objects to be loaded. For example, model = "/path/to/glm-model.RData"
Filepath to a local .R file that is evaluated into an environment and loaded. For example, model = "/path/to/glm-model.R"
An object. For example, model = "model = am.glm" For real-time web services (serviceType = 'Realtime'), only an R model object is accepted. For example, model = "model = am.glm"

`snapshot`

(optional) Identifier of the session snapshot to load. Can replace the model argument or be merged with it. If serviceType is 'Realtime', snapshot has to be NULL.

`inputs`

(optional) Defines the web service input schema. If empty, the service will not accept inputs. inputs are defined as a named list list(x = "logical") which describes the input parameter names and their corresponding data types:

numeric
integer
logical
character
vector
matrix
data.frame If serviceType is 'Realtime', inputs has to be NULL. Once published, service inputs automatically default to list(inputData = 'data.frame').

`outputs`

(optional) Defines the web service output schema. If empty, the service will not return a response value. outputs are defined as a named list list(x = "logical") that describes the output parameter names and their corresponding data types:

numeric
integer
logical
character
vector
matrix
data.frame Note: If code is defined as a function, then only one output value can be claimed. If serviceType is 'Realtime', outputs has to be NULL. Once published, service outputs automatically default to list(inputData = 'data.frame').

`artifacts`

(optional) A character vector of filenames defining which file artifacts should be returned during service consumption. File content is encoded as a Base64 String.

`v`

(optional) Defines a unique alphanumeric web service version. If the version is left blank, a unique guid is generated in its place. Useful during service development before the author is ready to officially publish a semantic version to share.

`alias`

(optional) An alias name of the prediction remote procedure call (RPC) function used to consume the service. If code is a function, then it will use that function name by default.

`destination`

(optional) The codegen output directory location.

`descr`

(optional) The description of the web service.

`serviceType`

(optional) The type of the web service. Valid values are 'Script' and 'Realtime'. Defaults to 'Script', which is for a standard web service, contains arbitrary R code, R scripts and/or models. 'Realtime' contains only a supported model object (see 'model' argument above).

Details

Complete documentation: https://go.microsoft.com/fwlink/?linkid=836352

Examples


 ## Not run:


# --- Publish service using `code` by function handle
add <- function(x, y) {
 x + y
}

publishService(
  "add-service",
   code = add,
   inputs = list(x = "numeric", y = "numeric"),
   outputs = list(result = "numeric")
)

publishService(
  "add-service",
   code = add,
   inputs = list(x = "numeric", y = "numeric"),
   outputs = list(result = "numeric"),
   serviceType = 'Script'
)

# --- Publish service using `code` by represented string values
publishService(
  "add-service",
   code = "result <- x + y",
   inputs = list(x = "numeric", y = "numeric"),
   outputs = list(result = "numeric")
)

# --- Publish service using `code` by file-path
publishService(
  "add-service",
   code = "/path/to/add.R", 
   inputs = list(x = "numeric", y = "numeric"),
   outputs = list(result = "numeric")
)

# --- Publish service using real-time model
publishService(
 "kyphosisLogRegModel",
 code = NULL,
 # --- `model` is required for web service with serviceType `Realtime` --- #
 model = rxLogit(Kyphosis ~ Age, data=kyphosis),
 v = "v1.0.0",
 alias = "predictKyphosisModel",
 # --- `serviceType` is required for this web service --- #
 serviceType = "Realtime"
)
## End(Not run)

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