class IRB::JobManager

Attributes

current_job[RW]

The active irb session

Public Class Methods

new() click to toggle source

Creates a new JobManager object

# File lib/irb/ext/multi-irb.rb, line 18
def initialize
  @jobs = []
  @current_job = nil
end

Public Instance Methods

delete(key) click to toggle source

Deletes the job at the given key.

# File lib/irb/ext/multi-irb.rb, line 122
def delete(key)
  case key
  when Integer
    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
      fail NoSuchJob, key
    end
  end
  until assoc = @jobs.pop; end unless @jobs.empty?
  @jobs.push assoc
end

insert(irb) click to toggle source

Add the given irb session to the jobs Array.

# File lib/irb/ext/multi-irb.rb, line 57
def insert(irb)
  @jobs.push [Thread.current, irb]
end

inspect() click to toggle source

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

# File lib/irb/ext/multi-irb.rb, line 146
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) click to toggle source

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

# File lib/irb/ext/multi-irb.rb, line 41
def irb(key)
  _, irb = search(key)
  irb
end

kill(*keys) click to toggle source

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 lib/irb/ext/multi-irb.rb, line 84
def kill(*keys)
  for key in keys
    th, _ = search(key)
    fail IrbAlreadyDead unless th.alive?
    th.exit
  end
end

main_irb() click to toggle source

Returns the top level irb session.

# File lib/irb/ext/multi-irb.rb, line 52
def main_irb
  @jobs[0][1]
end

main_thread() click to toggle source

Returns the top level thread.

# File lib/irb/ext/multi-irb.rb, line 47
def main_thread
  @jobs[0][0]
end

n_jobs() click to toggle source

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

# File lib/irb/ext/multi-irb.rb, line 28
def n_jobs
  @jobs.size
end

search(key) click to toggle source

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 lib/irb/ext/multi-irb.rb, line 106
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
  fail NoSuchJob, key if job.nil?
  job
end

switch(key) click to toggle source

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 lib/irb/ext/multi-irb.rb, line 68
def switch(key)
  th, irb = search(key)
  fail IrbAlreadyDead unless th.alive?
  fail IrbSwitchedToCurrentThread if th == Thread.current
  @current_job = irb
  th.run
  Thread.stop
  @current_job = irb(Thread.current)
end

thread(key) click to toggle source

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

# File lib/irb/ext/multi-irb.rb, line 34
def thread(key)
  th, = search(key)
  th
end