Class: Fairy::PBasicGroupBy

Inherits:
PIOFilter show all
Defined in:
lib/fairy/node/p-basic-group-by.rb

Direct Known Subclasses

PGroupBy, PMergeGroupBy, Fairy::PSort::PPreSort

Constant Summary collapse

ST_ALL_IMPORTED = 
:ST_ALL_IMPORTED
ST_WAIT_EXPORT_FINISH = 
:ST_WAIT_EXPORT_FINISH
ST_EXPORT_FINISH = 
:ST_EXPORT_FINISH

Constants inherited from PIOFilter

Fairy::PIOFilter::ST_WAIT_IMPORT

Constants inherited from PFilter

Fairy::PFilter::END_OF_STREAM, Fairy::PFilter::ST_ACTIVATE, Fairy::PFilter::ST_FINISH, Fairy::PFilter::ST_INIT

Instance Attribute Summary

Attributes inherited from PFilter

#IGNORE_EXCEPTION, #id, #log_id, #ntask

Instance Method Summary collapse

Methods inherited from PIOFilter

#input=

Methods inherited from PFilter

#abort_running, #basic_start, #break_running, #each, #global_break, #global_break_from_other, #handle_exception, #key, #key=, #next, #no, #no=, #notice_status, #processor, #start, #start_watch_status, #status=, #terminate_proc

Constructor Details

#initialize(id, ntask, bjob, opts, block_source) ⇒ PBasicGroupBy

Returns a new instance of PBasicGroupBy.



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# File 'lib/fairy/node/p-basic-group-by.rb', line 17

def initialize(id, ntask, bjob, opts, block_source)
  super
  @block_source = block_source

  @exports = {}
  @exports_queue = XThread::Queue.new
  
  @counter = {}

  #start_watch_exports
end

Instance Method Details

#add_export(key, export) ⇒ Object 



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# File 'lib/fairy/node/p-basic-group-by.rb', line 41

def add_export(key, export)
  @exports[key] = export
#      @exports_queue.push [key, export]
  # [BUG#171]同期処理でないとまずい.
  @bjob.add_exports(key, export, self)
end

#hash_key(e) ⇒ Object 



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# File 'lib/fairy/node/p-basic-group-by.rb', line 90

def hash_key(e)
  @key_proc.yield(e)
end

#init_key_proc ⇒ Object 



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# File 'lib/fairy/node/p-basic-group-by.rb', line 29

def init_key_proc
  hash_opt = @opts[:grouping_optimize]
  hash_opt = CONF.GROUP_BY_GROUPING_OPTIMIZE if hash_opt.nil?
	
  if hash_opt
	@key_proc = eval("proc{#{@block_source.source}}", @context.binding)
  else
	@key_proc = BBlock.new(@block_source, @context, self)
  end
  @key_proc
end

#start_export ⇒ Object 



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# File 'lib/fairy/node/p-basic-group-by.rb', line 48

def start_export
  Log::debug(self, "START_EXPORT")

  start do
	init_key_proc
	
	policy = @opts[:postqueuing_policy]
	begin
	  @input.each do |e|
 key = hash_key(e)
 if Import::CTLTOKEN_NULLVALUE === key
   next
 end
 export = @exports[key]
 unless export
   export = Export.new(policy)
   export.njob_id = @id
   export.add_key(key)
   add_export(key, export)
   @counter[key] = 0
 end
 export.push e
 @counter[key] += 1
	  end
	rescue
	  Log::debug_exception(self)
	  raise
	ensure
	  @exports_queue.push nil
	  @exports.each_pair{|key, export| 
 Log::debug(self, "G0 #{key} => #{@counter[key]}")	    
 export.push END_OF_STREAM}
	end
  end
end

#terminate ⇒ Object 



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# File 'lib/fairy/node/p-basic-group-by.rb', line 84

def terminate
  @wait_cv = @terminate_mon.new_cv
  wait_export_finish
  super
end

#wait_export_finish ⇒ Object 



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# File 'lib/fairy/node/p-basic-group-by.rb', line 94

def wait_export_finish

  Log::debug(self, "G1")

  self.status = ST_ALL_IMPORTED

  Log::debug(self, "G2")
  # ここの位置が重要
  self.status = ST_WAIT_EXPORT_FINISH
  # ここもいまいち
  Log::debug(self, "G3")
  @exports.each_pair do |key, export|
	Log::debug(self, "G3.WAIT #{key}")
	@terminate_mon.synchronize do
	  export.fib_wait_finish(@wait_cv)
	end
  end
  Log::debug(self, "G4")
  self.status = ST_EXPORT_FINISH
end