List OSRM servers

Lists osrm-routed processes. By default, it returns a snapshot of servers started by the current R session (registered via osrm_start_server() or osrm_start()). You can optionally list all osrm-routed processes running on the system, including those started by other sessions or manually.

You can stop a server by passing its id, port, or pid to osrm_stop().

Usage

osrm_servers(include_all = FALSE, output = c("data.frame", "list"))

Arguments

include_all

Logical; if TRUE, scans the system process table for all osrm-routed processes, including those not started by this package in the current session. Default is FALSE.

output

Character string specifying the return format. Either "data.frame" (the default) which returns a tabular summary with a custom print method, or "list" which returns a detailed list of server metadata objects.

Value

If output = "data.frame", returns a data.frame (class osrm_server_list) of OSRM job processes with columns: id, pid, port, algorithm, started_at, alive, has_handle, log, input_osm, center_lon, center_lat. External servers will have id prefixed with sys- and log set to <external>. If output = "list", returns a named list of server metadata.

Examples

# \donttest{
if (identical(Sys.getenv("OSRM_EXAMPLES"), "true")) {
  install_dir <- osrm_install(
    version = "latest",
    path_action = "session",
    quiet = TRUE
  )

  # copy example OSM PBF into a temporary workspace to avoid polluting pkg data
  pbf_path <- system.file("extdata/cur.osm.pbf", package = "osrm.backend")
  osrm_dir <- file.path(tempdir(), paste0("osrm-", Sys.getpid()))
  dir.create(osrm_dir, recursive = TRUE)
  tmp_pbf <- file.path(osrm_dir, "cur.osm.pbf")
  file.copy(from = pbf_path, to = tmp_pbf, overwrite = TRUE)
  graph <- osrm_prepare_graph(tmp_pbf, overwrite = TRUE, threads = 1L)

  srv <- osrm_start_server(graph$osrm_job_artifact, port = 6000, threads = 1L)
  osrm_servers()
  osrm_stop(srv)

  osrm_uninstall(
    dest_dir = install_dir,
    clear_path = TRUE,
    force = TRUE,
    quiet = TRUE
  )
  unlink(osrm_dir, recursive = TRUE)
}
# }