The KernelSession Class

An object of this class handles the communication with an R process. There is usually one main session, but there may also sessions for detached code cells.

Super classes

processx::process -> callr::r_session -> RKernel::RSessionBase -> RKernelSession

Public fields

http_port

The port number of HTML help.

hostname

The hostname.

yield

An optional function to service kernel requests

kernel

The reference to the controlling kernel object

Methods

Public methods

• RKernelSession$connect()

• RKernelSession$setup()

• RKernelSession$start_graphics()

• RKernelSession$dev_new()

• RKernelSession$graphics_details()

• RKernelSession$http_get()

• RKernelSession$clone()

Inherited methods

• processx::process$as_ps_handle()
• processx::process$format()
• processx::process$get_cmdline()
• processx::process$get_cpu_times()
• processx::process$get_error_connection()
• processx::process$get_error_file()
• processx::process$get_exe()
• processx::process$get_exit_status()
• processx::process$get_input_connection()
• processx::process$get_input_file()
• processx::process$get_memory_info()
• processx::process$get_name()
• processx::process$get_output_connection()
• processx::process$get_output_file()
• processx::process$get_pid()
• processx::process$get_poll_connection()
• processx::process$get_result()
• processx::process$get_start_time()
• processx::process$get_status()
• processx::process$get_username()
• processx::process$get_wd()
• processx::process$has_error_connection()
• processx::process$has_input_connection()
• processx::process$has_output_connection()
• processx::process$has_poll_connection()
• processx::process$interrupt()
• processx::process$is_alive()
• processx::process$is_incomplete_error()
• processx::process$is_incomplete_output()
• processx::process$is_supervised()
• processx::process$kill()
• processx::process$kill_tree()
• processx::process$poll_io()
• processx::process$read_all_error()
• processx::process$read_all_error_lines()
• processx::process$read_all_output()
• processx::process$read_all_output_lines()
• processx::process$read_error()
• processx::process$read_error_lines()
• processx::process$read_output_lines()
• processx::process$resume()
• processx::process$signal()
• processx::process$supervise()
• processx::process$suspend()
• processx::process$wait()
• processx::process$write_input()
• callr::r_session$attach()
• callr::r_session$call()
• callr::r_session$close()
• callr::r_session$debug()
• callr::r_session$finalize()
• callr::r_session$get_running_time()
• callr::r_session$get_state()
• callr::r_session$poll_process()
• callr::r_session$print()
• callr::r_session$read()
• callr::r_session$run()
• callr::r_session$run_with_output()
• callr::r_session$traceback()
• RKernel::RSessionBase$initialize()
• RKernel::RSessionBase$read_output()
• RKernel::RSessionBase$receive_all_output()
• RKernel::RSessionBase$receive_output()
• RKernel::RSessionBase$send_input()
• RKernel::RSessionBase$send_receive()
• RKernel::RSessionBase$sleeping()

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Method connect()

Connect the session with the main Kernel object

Usage

RKernelSession$connect(yield, kernel)

Arguments

yield

The function that is called when the session objects yields back control to the kernel object, for example in order to wait for comm message when a widget is active.

kernel

The main kernel objectd

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Method setup()

Set up the R session, by installing hooks etc.

Usage

RKernelSession$setup()

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Method start_graphics()

Initialize graphics, start device and return details

Usage

RKernelSession$start_graphics()

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Method dev_new()

Start a httpgd device and return the graphics details.

Usage

RKernelSession$dev_new()

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Method graphics_details()

Return the graphics details.

Usage

RKernelSession$graphics_details()

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Method http_get()

Usage

RKernelSession$http_get(slug = "", query = "")

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Method clone()

The objects of this class are cloneable with this method.

Usage

RKernelSession$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.