Class: IRB::JobManager (Ruby 2.3.4)

IRB::JobManager

Attributes

current_job[RW]

The active irb session

Public Class Methods

new()

Creates a new JobManager object

 
               # File irb/ext/multi-irb.rb, line 19
def initialize
  @jobs = []
  @current_job = nil
end

Public Instance Methods

delete(key)

Deletes the job at the given key.

 
               # File irb/ext/multi-irb.rb, line 123
def delete(key)
  case key
  when Integer
    IRB.fail NoSuchJob, key unless @jobs[key]
    @jobs[key] = nil
  else
    catch(:EXISTS) do
      @jobs.each_index do
        |i|
        if @jobs[i] and (@jobs[i][0] == key ||
            @jobs[i][1] == key ||
            @jobs[i][1].context.main.equal?(key))
          @jobs[i] = nil
          throw :EXISTS
        end
      end
      IRB.fail NoSuchJob, key
    end
  end
  until assoc = @jobs.pop; end unless @jobs.empty?
  @jobs.push assoc
end
insert(irb)

Add the given irb session to the jobs Array.

 
               # File irb/ext/multi-irb.rb, line 58
def insert(irb)
  @jobs.push [Thread.current, irb]
end
inspect()

Outputs a list of jobs, see the irb command irb_jobs, or jobs.

 
               # File irb/ext/multi-irb.rb, line 147
def inspect
  ary = []
  @jobs.each_index do
    |i|
    th, irb = @jobs[i]
    next if th.nil?

    if th.alive?
      if th.stop?
        t_status = "stop"
      else
        t_status = "running"
      end
    else
      t_status = "exited"
    end
    ary.push format("#%d->%s on %s (%s: %s)",
      i,
      irb.context.irb_name,
      irb.context.main,
      th,
      t_status)
  end
  ary.join("\n")
end
irb(key)

Returns the irb session for the given key object, see search for more information.

 
               # File irb/ext/multi-irb.rb, line 42
def irb(key)
  _, irb = search(key)
  irb
end
kill(*keys)

Terminates the irb sessions specified by the given keys.

Raises an IrbAlreadyDead exception if one of the given keys is already terminated.

See Thread#exit for more information.

 
               # File irb/ext/multi-irb.rb, line 85
def kill(*keys)
  for key in keys
    th, _ = search(key)
    IRB.fail IrbAlreadyDead unless th.alive?
    th.exit
  end
end
main_irb()

Returns the top level irb session.

 
               # File irb/ext/multi-irb.rb, line 53
def main_irb
  @jobs[0][1]
end
main_thread()

Returns the top level thread.

 
               # File irb/ext/multi-irb.rb, line 48
def main_thread
  @jobs[0][0]
end
n_jobs()

The total number of irb sessions, used to set irb_name of the current Context.

 
               # File irb/ext/multi-irb.rb, line 29
def n_jobs
  @jobs.size
end
search(key)

Returns the associated job for the given key.

If given an Integer, it will return the key index for the jobs Array.

When an instance of Irb is given, it will return the irb session associated with key.

If given an instance of Thread, it will return the associated thread key using Object#=== on the jobs Array.

Otherwise returns the irb session with the same top-level binding as the given key.

Raises a NoSuchJob exception if no job can be found with the given key.

 
               # File irb/ext/multi-irb.rb, line 107
def search(key)
  job = case key
        when Integer
          @jobs[key]
        when Irb
          @jobs.find{|k, v| v.equal?(key)}
        when Thread
          @jobs.assoc(key)
        else
          @jobs.find{|k, v| v.context.main.equal?(key)}
        end
  IRB.fail NoSuchJob, key if job.nil?
  job
end
switch(key)

Changes the current active irb session to the given key in the jobs Array.

Raises an IrbAlreadyDead exception if the given key is no longer alive.

If the given irb session is already active, an IrbSwitchedToCurrentThread exception is raised.

 
               # File irb/ext/multi-irb.rb, line 69
def switch(key)
  th, irb = search(key)
  IRB.fail IrbAlreadyDead unless th.alive?
  IRB.fail IrbSwitchedToCurrentThread if th == Thread.current
  @current_job = irb
  th.run
  Thread.stop
  @current_job = irb(Thread.current)
end
thread(key)

Returns the thread for the given key object, see search for more information.

 
               # File irb/ext/multi-irb.rb, line 35
def thread(key)
  th, = search(key)
  th
end