def create_app(*, debug=False, threads=4):
"""Return an instance of the Flask application.
Args:
debug (bool): a flag to activate the debug mode for the app
(default: False).
threads (int): number of threads to use
Return:
an instance of the Flask application.
"""
app = Flask(__name__)
CORS(app,
headers=(
'x-requested-with',
'content-type',
'accept',
'origin',
'authorization',
'x-csrftoken',
'withcredentials',
'cache-control',
'cookie',
'session-id',
),
supports_credentials=True)
app.debug = debug
app.config['bigchain_pool'] = utils.pool(Bigchain, size=threads)
add_routes(app)
return app
def create_app(*, debug=False, threads=1, bigchaindb_factory=None):
"""Return an instance of the Flask application.
Args:
debug (bool): a flag to activate the debug mode for the app
(default: False).
threads (int): number of threads to use
Return:
an instance of the Flask application.
"""
if not bigchaindb_factory:
bigchaindb_factory = Bigchain
app = Flask(__name__)
app.wsgi_app = StripContentTypeMiddleware(app.wsgi_app)
CORS(app)
app.debug = debug
app.config['bigchain_pool'] = utils.pool(bigchaindb_factory, size=threads)
add_routes(app)
return app
def create_app(*, debug=False, threads=1, bigchaindb_factory=None):
"""Return an instance of the Flask application.
Args:
debug (bool): a flag to activate the debug mode for the app
(default: False).
threads (int): number of threads to use
Return:
an instance of the Flask application.
"""
if not bigchaindb_factory:
bigchaindb_factory = BigchainDB
app = Flask(__name__)
app.wsgi_app = StripContentTypeMiddleware(app.wsgi_app)
CORS(app)
app.debug = debug
app.config['bigchain_pool'] = utils.pool(bigchaindb_factory, size=threads)
add_routes(app)
return app
def test_empty_pool_is_populated_with_instances(mock_queue):
from bigchaindb import utils
pool = utils.pool(lambda: 'hello', 4)
assert len(mock_queue.items) == 0
with pool() as instance:
assert instance == 'hello'
assert len(mock_queue.items) == 1
with pool() as instance:
assert instance == 'hello'
assert len(mock_queue.items) == 2
with pool() as instance:
assert instance == 'hello'
assert len(mock_queue.items) == 3
with pool() as instance:
assert instance == 'hello'
assert len(mock_queue.items) == 4
with pool() as instance:
assert instance == 'hello'
assert len(mock_queue.items) == 4
def test_empty_pool_is_populated_with_instances(mock_queue):
from bigchaindb import utils
pool = utils.pool(lambda: 'hello', 4)
assert len(mock_queue.items) == 0
with pool() as instance:
assert instance == 'hello'
assert len(mock_queue.items) == 1
with pool() as instance:
assert instance == 'hello'
assert len(mock_queue.items) == 2
with pool() as instance:
assert instance == 'hello'
assert len(mock_queue.items) == 3
with pool() as instance:
assert instance == 'hello'
assert len(mock_queue.items) == 4
with pool() as instance:
assert instance == 'hello'
assert len(mock_queue.items) == 4
def create_app(*, debug=False, threads=4):
"""Return an instance of the Flask application.
Args:
debug (bool): a flag to activate the debug mode for the app
(default: False).
threads (int): number of threads to use
Return:
an instance of the Flask application.
"""
app = Flask(__name__)
CORS(app,
headers=(
'x-requested-with',
'content-type',
'accept',
'origin',
'authorization',
'x-csrftoken',
'withcredentials',
'cache-control',
'cookie',
'session-id',
),
supports_credentials=True)
app.debug = debug
app.config['bigchain_pool'] = utils.pool(Bigchain, size=threads)
add_routes(app)
return app
def test_pool_raises_empty_exception_when_timeout(mock_queue):
from bigchaindb import utils
pool = utils.pool(lambda: 'hello', 1, timeout=1)
assert len(mock_queue.items) == 0
with pool() as instance:
assert instance == 'hello'
assert len(mock_queue.items) == 1
# take the only resource available
assert pool().__enter__() == 'hello'
with pytest.raises(queue.Empty):
with pool() as instance:
assert instance == 'hello'
def test_pool_raises_empty_exception_when_timeout(mock_queue):
from bigchaindb import utils
pool = utils.pool(lambda: 'hello', 1, timeout=1)
assert len(mock_queue.items) == 0
with pool() as instance:
assert instance == 'hello'
assert len(mock_queue.items) == 1
# take the only resource available
assert pool().__enter__() == 'hello'
with pytest.raises(queue.Empty):
with pool() as instance:
assert instance == 'hello'
def create_app(*, debug=False, threads=4):
"""Return an instance of the Flask application.
Args:
debug (bool): a flag to activate the debug mode for the app
(default: False).
threads (int): number of threads to use
Return:
an instance of the Flask application.
"""
app = Flask(__name__)
app.debug = debug
app.config['bigchain_pool'] = utils.pool(Bigchain, size=threads)
add_routes(app)
return app
def test_pool_blocks_if_no_instances_available(mock_queue):
from bigchaindb import utils
pool = utils.pool(lambda: 'hello', 4)
assert len(mock_queue.items) == 0
# We need to manually trigger the `__enter__` method so the context
# manager will "hang" and not return the resource to the pool
assert pool().__enter__() == 'hello'
assert len(mock_queue.items) == 0
assert pool().__enter__() == 'hello'
assert len(mock_queue.items) == 0
assert pool().__enter__() == 'hello'
assert len(mock_queue.items) == 0
# We need to keep a reference of the last context manager so we can
# manually release the resource
last = pool()
assert last.__enter__() == 'hello'
assert len(mock_queue.items) == 0
# This would block using `queue.Queue` but since we mocked it it will
# just raise a IndexError because it's trying to pop from an empty list.
with pytest.raises(IndexError):
assert pool().__enter__() == 'hello'
assert len(mock_queue.items) == 0
# Release the last resource
last.__exit__(None, None, None)
assert len(mock_queue.items) == 1
assert pool().__enter__() == 'hello'
assert len(mock_queue.items) == 0
def test_pool_blocks_if_no_instances_available(mock_queue):
from bigchaindb import utils
pool = utils.pool(lambda: 'hello', 4)
assert len(mock_queue.items) == 0
# We need to manually trigger the `__enter__` method so the context
# manager will "hang" and not return the resource to the pool
assert pool().__enter__() == 'hello'
assert len(mock_queue.items) == 0
assert pool().__enter__() == 'hello'
assert len(mock_queue.items) == 0
assert pool().__enter__() == 'hello'
assert len(mock_queue.items) == 0
# We need to keep a reference of the last context manager so we can
# manually release the resource
last = pool()
assert last.__enter__() == 'hello'
assert len(mock_queue.items) == 0
# This would block using `queue.Queue` but since we mocked it it will
# just raise a IndexError because it's trying to pop from an empty list.
with pytest.raises(IndexError):
assert pool().__enter__() == 'hello'
assert len(mock_queue.items) == 0
# Release the last resource
last.__exit__(None, None, None)
assert len(mock_queue.items) == 1
assert pool().__enter__() == 'hello'
assert len(mock_queue.items) == 0
