A FireSale plugin

A FireSale plugin

A FireSale plugin

Details

The class encapsulates the firesale functionality into a fiery plugin. You use it by creating and attaching it to a fiery server object.

Initialization

A new 'FireSale'-object is initialized using the new() method on the generator (shown here with the environment driver):

Usage

datastore <- FireSale$new(storr::driver_environment())

Fiery plugin

This class is mainly intended to be used as a fiery plugin, by attaching it to a fiery server object. It works by providing a datastore element (name can be modified with the arg_name argument during initialization) in the arg_list argument to request handlers. The object contains two elements, global and session. The first contains data shared by all sessions, while the latter is scoped to the current session. Both of these elements are list-like, but in reality are interfaces to the underlying data store

Active bindings

name

The name of the plugin

Methods

Public methods

• FireSale$new()

• FireSale$format()

• FireSale$get_mall()

• FireSale$shiny_mall()

• FireSale$on_attach()

• FireSale$clone()

---

Method new()

Initializes a new FireSale object

Usage

FireSale$new(
  driver,
  arg_name = "datastore",
  gc_interval = 3600,
  max_age = gc_interval
)

Arguments

driver

A storr driver to use for the backend

arg_name

A string giving the name under which the data store should appear in the arg_list argument

gc_interval

The interval with which the backend should be garbage collected. The value is indicative and a garbage collection may happen at longer intervals

max_age

The maximum age in second an ID can be left unused before being purged. The value is indicative and a stale ID store may linger longer than this

---

Method format()

Textual representation of the plugin

Usage

FireSale$format(...)

Arguments

...

ignored

---

Method get_mall()

Create a mall (a collection of storefronts) containing a global and a session-specific storefront

Usage

FireSale$get_mall(id)

Arguments

id

The session id of the current session

---

Method shiny_mall()

Create a mall from a shiny session object. If the shiny app has been launched from a plumber2 server the session id is automatically resolved. If not, you must provide an id function that extracts the session id from a reqres::Request object.

Usage

FireSale$shiny_mall(session, id_fun = NULL)

Arguments

session

A ShinySession object

id_fun

A function that can extract the session ID from a Request object. This is handled automatically for shiny apps launched from a plumber2 server. The default id function for fiery servers is constructed with fiery::session_id_cookie()

---

Method on_attach()

Method for use by fiery when attached as a plugin. Should not be called directly.

Usage

FireSale$on_attach(app, ...)

Arguments

app

The fiery server object

...

Ignored

---

Method clone()

The objects of this class are cloneable with this method.

Usage

FireSale$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

Examples

# Create a datastore object
ds <- FireSale$new(storr::driver_environment())

# Attach it to a fiery server
app <- fiery::Fire$new()

app$attach(ds)