BackendFactory

This class is a factory that provides instances of the Context class.

See also

Context, ProgressTrackingContext, Service, and Backend

Methods

Public methods

• ContextFactory$get()

• ContextFactory$clone()

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Method get()

Obtain instances of the Context class.

Usage

ContextFactory$get(type)

Arguments

type

A character string specifying the type of the Context to instantiate. Possible values are "regular" and "progress". See the Details section for more information.

Details

When type = "regular" a Context instance is created and returned. When type = "progress" a ProgressTrackingContext instance is provided instead.

Returns

An object of type Context. It throws an error if the requested context type is not supported.

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Method clone()

The objects of this class are cloneable with this method.

Usage

ContextFactory$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

Examples

# Create a context factory.
context_factory <- ContextFactory$new()

# Get a regular context instance.
context <- context_factory$get("regular")

# Check the class of the context instance.
class(context)
#> [1] "Context" "R6"     

# Get a progress context instance.
context <- context_factory$get("progress")
class(context)
#> [1] "ProgressTrackingContext" "Context"                
#> [3] "R6"