serverportfolio.Validation.ManagerTk Class Reference

Manage and serialize the access to a ValidationTkinter application, necessary when UpdateStock is run with multiple threads. More...

Public Member Functions
def	__init__
	Constructor. More...
def	update_me
	Check regularly and indefinitely, the queue. More...
Queue functions, to be called by threads
def	write
	Write a new input to the queue. More...
def	read_answer
	Return the updated dict_interactive. More...

Public Attributes
	queue
	Queue to receive and send data (dict_interactive and stock symbol). More...
	queue_answer
	new result data. More...

Private Member Functions
def	_check_stop
	Check state of the object before stopping. More...

Private Attributes
	_logger_
	_root_tk
	store a Tk main environment. More...

Detailed Description

Manage and serialize the access to a ValidationTkinter application, necessary when UpdateStock is run with multiple threads.

Warning

The object must be created and run from the main thread (tkinter multi-thread limitation)

Interface to ValidationTkinter which assures serialization and thread-safety. The input dict_interactive are treated entry by entry, from an input queue and returned in an output queue. Two GUI cannot exist at the same time. The answer queue should never contain more than 1 entry.
Data are exchanged by the use of Queue for the serialization.
Usage, see main section:

# create the object
manager = ManagerTk()
# run a pool of threads aware of manager. Inside the function a stop signal ['QUIT'] will be send to the manager queue when all thread joined.
thd_pool_run( list_stock, manager )

# manager enters an infinite loop, and blocks at this line
manager.update_me()

# from the threads send and receive data
manager.write( [stock_symbol], dict_interactive )
new_dict_interactive = manager.read()
# continue post-process...  

Attention

The answer queue should never contain more than 1 entry.

Note

In this version a new tk application is recreated each time. Later one unique Tk widget could be updated.

Definition at line 346 of file Validation.py.

Constructor & Destructor Documentation

def serverportfolio.Validation.ManagerTk.__init__

(

self

)

Constructor.

Definition at line 349 of file Validation.py.

Member Function Documentation

def serverportfolio.Validation.ManagerTk._check_stop (   self )

private

Check state of the object before stopping.

Definition at line 410 of file Validation.py.

Referenced by serverportfolio.Validation.ManagerTk.update_me().

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def serverportfolio.Validation.ManagerTk.read_answer

(

self

)

Return the updated dict_interactive.

Returns

modified dict interactive

Definition at line 374 of file Validation.py.

def serverportfolio.Validation.ManagerTk.update_me

(

self

)

Check regularly and indefinitely, the queue.

This function is blocking.
To stop the Manager, send the message : ['QUIT'].

Definition at line 387 of file Validation.py.

References serverportfolio.Validation.ManagerTk._check_stop(), and serverportfolio.Validation.ManagerTk._root_tk.

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def serverportfolio.Validation.ManagerTk.write	(		self,
			new_entry
	)

Write a new input to the queue.

new_entry must be a list, send ['QUIT'] to stop the manager

Parameters

new_entry

list with format : ['stock_symbol',dict_interactive]

Definition at line 370 of file Validation.py.

Member Data Documentation

serverportfolio.Validation.ManagerTk._logger_

private

Definition at line 350 of file Validation.py.

serverportfolio.Validation.ManagerTk._root_tk

private

store a Tk main environment.

Definition at line 362 of file Validation.py.

Referenced by serverportfolio.Validation.ManagerTk.update_me().

serverportfolio.Validation.ManagerTk.queue

Queue to receive and send data (dict_interactive and stock symbol).

new data to be processed

Definition at line 355 of file Validation.py.

serverportfolio.Validation.ManagerTk.queue_answer

new result data.

The caller should get the result before a next entry.

Todo:

to make more secure, a Pipe ?

Definition at line 359 of file Validation.py.

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The documentation for this class was generated from the following file:

• serverportfolio/Validation.py