Class: Zillabyte::Runner::AppRunner

Inherits:
Command::Base show all
Includes:
Helpers
Defined in:
lib/zillabyte/runner/app_runner.rb

Overview

HIDDEN:

Constant Summary

Constants inherited from Command::Base

Command::Base::META_COLUMNS

Instance Attribute Summary

Attributes inherited from Command::Base

#args, #options

Instance Method Summary collapse

Methods included from Helpers

#add_git_remote, #app, #ask, #create_git_remote, #error, #extract_app_from_git_config, #extract_app_in_dir, #format_with_bang, #get_flow_name, #git, #handle_downloading_manifest, #has_git?, #longest, #read_multiline, #with_tty

Methods inherited from Command::Base

alias_command, #api, extract_banner, extract_description, extract_help, extract_help_from_caller, extract_options, extract_summary, inherited, #initialize, method_added, namespace

Constructor Details

This class inherits a constructor from Zillabyte::Command::Base

Instance Method Details

#cdisplay(name, message) ⇒ Object 



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# File 'lib/zillabyte/runner/app_runner.rb', line 177

def cdisplay(name, message)

    color = @colors[name] || :default
    if message == ""
      display ""
    else
      display "#{name} - #{message}".colorize(color)
    end
end

#describe_app(meta) ⇒ Object 



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# File 'lib/zillabyte/runner/app_runner.rb', line 197

def describe_app(meta)
  colors ||= [:green, :yellow, :magenta, :cyan, :white, :blue, :light_yellow, :light_blue, :red, :light_magenta, :light_cyan]
  rjust = 20
  display "#{'app name'.rjust(rjust)}: #{meta['name']}"
  display "#{'app language'.rjust(rjust)}: #{meta['language']}"
  meta['nodes'].each_with_index do |node, index|
    @colors[node['name']] ||= colors[index % colors.length]
    color = @colors[node['name']]
    display (("="*rjust + "  operation ##{index}").colorize(color))
    display "#{"name".rjust(rjust)}: #{node['name'].to_s.colorize(color)}"
    display "#{"type".rjust(rjust)}: #{node['type'].to_s.colorize(color)}"
    display "#{"matches".rjust(rjust)}: #{JSON.pretty_generate(node['matches']).indent(rjust+2).lstrip.colorize(color)}" if node['matches']
    display "#{"consumes".rjust(rjust)}: #{node['consumes'].to_s.colorize(color)}" if node['consumes']
    display "#{"emits".rjust(rjust)}: #{JSON.pretty_generate(node['emits']).indent(rjust+2).lstrip.colorize(color)}" if node['emits']
  end
end

#display(message, newline = true) ⇒ Object 



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# File 'lib/zillabyte/runner/app_runner.rb', line 192

def display(message, newline = true)
  @session.display(message, newline)
end

#query_agnostic(query) ⇒ Object 



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# File 'lib/zillabyte/runner/app_runner.rb', line 188

def query_agnostic(query)
  @session.api.query.agnostic(query)
end

#run(meta, dir = Dir.pwd, session = nil, options = {}) ⇒ Object 



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# File 'lib/zillabyte/runner/app_runner.rb', line 11

def run (meta, dir = Dir.pwd, session = nil, options = {})

  if meta.nil? or session.nil?
    return
  end

  @session = session

  @colors = {}
  output = options[:output]
  otype = options[:output_type] 
  interactive = options[:interactive]
  cycles = (options[:cycles] || "1").to_i

  # Show the user what we know about their app... 
  display "inferring your app details..."
  describe_app(meta)

  # Setup streams
  @nodes = meta["nodes"]

  # Index stream consummers and emitters by stream name
  @arcs = meta["arcs"]

  # Organize component pipes
  @operations = {}
  @operation_pipes = {}

  # On each cycle, setup and tear down a test harness
  (1..cycles).each do |cycle|

    display "starting cycle #{cycle}" unless  cycles == 1
    
    begin

      # Setup component pipes
      @nodes.each do |n|

        name = n["name"]
        type = n["type"]
        emits = n["emits"]
        if n["type"] ==  "source"
          options[:end_cycle_policy] = n["end_cycle_policy"]
        end
        
        # Create two new pipes in the parent.
        rd_child, wr_parent = IO.pipe()
        rd_parent, wr_child = IO.pipe()

        @operation_pipes[name] = {
          :rd_child => rd_child,      
          :wr_child => wr_child,
          :rd_parent => rd_parent,        
          :wr_parent => wr_parent
        }
      end

      # Maps origin => {stream => [destinations]}
      @arc_map = {}
      @arcs.each do |a|
        origin = a["origin"]
        name = a["name"]
        dest = a["dest"]
        @arc_map[origin] ||= {}
        @arc_map[origin][name] ||= []
        @arc_map[origin][name] << a["dest"]
      end

      # Spawn component threads
      @nodes.each do |n|

        name = n["name"]
        type = n["type"]
        emits = n["emits"]

        pipes = @operation_pipes[name] 
        rd_child = pipes[:rd_child]
        wr_child = pipes[:wr_child]
        rd_parent = pipes[:rd_parent]        
        wr_parent = pipes[:wr_parent]

        # Fork.
        pid = fork()
        if pid # In parent
          # Close the reading end of the child so we can write to the child.
          rd_child.close()
          # Close the writing end of the child so we can read from the child.
          wr_child.close()

        else # in child
          # Close the writing end of the parent so we can read from the parent.
          wr_parent.close()
          # Close the reading end of the parent so we can write to the parent.
          rd_parent.close()
          begin


            # Setup reading and writing pipes for communicating with consumee component
            in_pipe = {:rd_child => @operation_pipes[name][:rd_child], :wr_child => @operation_pipes[name][:wr_child]}

            # Index consumer pipes by stream name, consumer_name
            out_pipes = {}


            if type != "sink"
              @arc_map[name].each_pair do |stream, destinations|
                out_pipes[stream] ||= {}
                destinations.each do |dest|
                  out_pipes[stream][dest] = {:wr_parent => @operation_pipes[dest][:wr_parent], :rd_parent => @operation_pipes[dest][:rd_parent] }
                end
              end
            end

            # Run the child process 
            Zillabyte::Runner::MultilangOperation.run(n, dir, in_pipe, out_pipes, self, meta, options)
  
          ensure
            # Close the reading end of the child
            rd_child.close()
            # Close the writing end of the child
            wr_child.close()
            exit!(-1)
          end

        end #end child
      end 

      if interactive
        display "To view results:  Enter 'end'    "
        display "To exit the test: Enter 'Ctrl-C' "
        display ""


        while true
          display "Enter an input tuple in JSON format i.e.{ \"url\" : \"foo.com\", \"html\" : \"bar.html\" }"
          msg = ask

          begin
            JSON.parse(msg)
          rescue JSON::ParserError
            display "Received invalid JSON object"
            next
          end
          # Send tuple to source
         @operation_pipes["source_1"][:wr_parent].puts msg
        end
      end 

    ensure
      Process.waitall()
      @operation_pipes.each do |name, pipes|
        #Close the  writing end of the parent
        pipes[:wr_parent].close()
        # Close the reading end of the parent
        pipes[:rd_parent].close()
      end
    end

  end 
end

#session ⇒ Object 



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# File 'lib/zillabyte/runner/app_runner.rb', line 172

def session
  @session
end