from gblackboard import Blackboard
from gblackboard import SupportedMemoryType

blackboard = Blackboard(SupportedMemoryType.DICTIONARY)
# Set a key-value data;
# `set` method should be called only once for a key.
# It's a kind of initialization for data.
blackboard.set('key', 'value')
# Retrieve data with key.
value = blackboard.get('key')
# Update data with new value;
# `update` method should be called
# after `set` method called for a key.
blackboard.update('key', 'new_value')
# Delete data from blackboard with key.
blackboard.drop('key')
# Clear all data in blackboard.
blackboard.clear()

from gblackboard import Blackboard
from gblackboard import SupportedMemoryType

def callback(data):
    print(data)

blackboard = Blackboard(SupportedMemoryType.DICTIONARY)
blackboard.set('key', 'value')
# Register `callback` function as a callback.
blackboard.register_callback('key', callback)
# Update data;
# `callback` function will be called during `update`,
# and `new_value` will passed to `callback` function.
blackboard.update('key', 'new_value')

from gblackboard import Blackboard
from gblackboard import SupportedMemoryType

import datetime as dt

class User(object):

    def __init__(self, name, email):
        self.name = name
        self.email = email
        self.created_at = dt.datetime.now()

    def __repr__(self):
        return '<User(name={self.name!r})>'.format(self=self)

blackboard = Blackboard(SupportedMemoryType.DICTIONARY)

# You can also store customized class objects in blackboard.
blackboard.set('user', User("G.Ted", "gted221@gmail.com"))
user = blackboard.get('user')
print(user)
# <User(name='G.Ted')> will be printed.

# List of complex objects is also supported.
blackboard.set('users',
    [
        User("User1", "user1@gblackboard.com"),
        User("User2", "user2@gblackboard.com"),
    ]
)
users = blackboard.get('users')
print(users)
# [<User(name='User1')>, <User(name='User2')>] will be printed.

from gblackboard import Blackboard
from gblackboard import SupportedMemoryType

import datetime as dt

class User(object):

    def __init__(self, name, email):
        self.name = name
        self.email = email
        self.created_at = dt.datetime.now()

    def __repr__(self):
        return '<User(name={self.name!r})>'.format(self=self)

blackboard = Blackboard(SupportedMemoryType.DICTIONARY)
# Store sample data
blackboard.set('user', User("G.Ted", "gted221@gmail.com"))
# Save current blackboard contents as file.
blackboard.save()
# Close current blackboard;
# this means clear all data in blackboard
blackboard.close()
# ------------------------------------------------------------
blackboard = Blackboard(SupportedMemoryType.DICTIONARY)
# Load saved blackboard contents from files.
blackboard.load()
user = blackboard.get('user')
print(user)
# <User(name='G.Ted')> will be printed.