def test_serialization_unserialization():
trunk = Trunk.randomize('a', 30, 60, 20)
s = trunk.serialize()
unserialized = Trunk.unserialize(s)
assert trunk == unserialized
def unserialize(cls, obj):
p = cls(obj["name"], obj["genre"], obj["max_trunk_length"], obj["pot_water_capacity"], obj["available_water"])
p.base_trunk = Trunk.unserialize(obj["plant"])
return p
def create_tree(tree, level, max_trunk_length):
if level > 0:
new_trunks = Trunk.next_children(tree.type, max_trunk_length)
if level > 1:
for t in new_trunks:
create_tree(t, level - 1, max_trunk_length)
tree.children = new_trunks
def randomize(cls, name, start_level, max_trunk_length, pot_capacity, initial_water):
p = cls(name, "random", max_trunk_length, pot_capacity, initial_water)
p.max_trunk_length = max_trunk_length
p.base_trunk = Trunk.randomize_default("a", max_trunk_length)
create_tree(p.base_trunk, start_level, max_trunk_length)
return p
def __init__(self, data_list, x, y, bsize, sess):
Trunk.__init__(self, data_list, x, y, bsize, sess)
################################################################################
#Make trunk segments that will connect the nodes
################################################################################
#a list of specific attachment points overrides the number of nodes argument
if(config['attach_points']):
config['nodes'] = len(config['attach_points'])
#this object figures out how many cable segments are needed and what length each segment
#should be.
#trunk object figures out a list of attach_points after this object is instantiated
trunk=Trunk( length=config['length']
, nodes=config['nodes']
, start_pad=config['start_pad']
, end_pad=config['end_pad']
, separation_min=config['separation_min']
, start_attach=config['start_attach']
, end_attach=config['end_attach']
, random_attach=config['random_attach']
, attach_error=config['attach_error']
, attach_points=config['attach_points']
, max_seg_length=(1/config['segments_per_meter'])
)
#feed back precise attach points into json data structure
config['attach_points'] = trunk.attach_points
#Prepare a data structure to hold cable models and trunk segment parameters
#actual number of cables segments is between nnodes-1 and nnodes+1
#add an extra cable segment if attach_point[0] != 0
#add an extra cable segment if attach_point[-1] != config['length']
#always declare space for segment[0] and segment[nodes+1]
#expect that segment[0] and segment[nodes+1] will be ignored later if they are not needed
class PGQueue(object):
def __init__(self, dsn):
self.trunk = Trunk(dsn)
def create(self, name):
self.trunk.listen(name)
def get(self, name, block=True, timeout=None):
channel, payload = self.trunk.get(name, block=block, timeout=timeout)
with self.trunk.cursor() as cursor:
cursor.execute("SELECT id, message FROM pop_lock(%s)", (name,))
row = cursor.fetchone()
if row is None:
raise Empty()
return row
def get_nowait(self, name):
return self.get(name, block=False)
def put(self, name, message):
with self.trunk.cursor() as cursor:
cursor.execute("INSERT INTO trunk_queue (name, message) VALUES (%s, %s)", (name, message))
self.trunk.notify(name)
def empty(self, name):
return 0 == self.qsize(name)
def qsize(self, name):
with self.trunk.cursor() as cursor:
cursor.execute("SELECT COUNT(*) FROM trunk_queue WHERE name = %s", (name,))
row = cursor.fetchone()
return row[0]
def purge(self, name):
size = self.qsize(name)
with self.trunk.cursor() as cursor:
cursor.execute("DELETE FROM trunk_queue WHERE name = %s", (name,))
return size
def close(self):
self.trunk.close()
def __init__(self, dsn):
self.trunk = Trunk(dsn)
class PGQueue(object):
def __init__(self, dsn):
self.trunk = Trunk(dsn)
def create(self, name):
self.trunk.listen(name)
def get(self, name, block=True, timeout=None):
try:
channel, payload = self.trunk.get(name,
block=block,
timeout=timeout)
except Empty:
pass
with self.trunk.cursor() as cursor:
cursor.execute("SELECT id, message FROM public.pop_lock(%s)",
(name, ))
row = cursor.fetchone()
if row is None:
raise Empty()
return row
def get_nowait(self, name):
return self.get(name, block=False)
def put(self, name, message):
with self.trunk.cursor() as cursor:
cursor.execute(
"INSERT INTO public.trunk_queue (name, message) VALUES (%s, %s)",
(name, message))
self.trunk.notify(name)
def empty(self, name):
return 0 == self.qsize(name)
def qsize(self, name):
with self.trunk.cursor() as cursor:
cursor.execute(
"SELECT COUNT(*) FROM public.trunk_queue WHERE name = %s",
(name, ))
row = cursor.fetchone()
return row[0]
def purge(self, name):
size = self.qsize(name)
with self.trunk.cursor() as cursor:
cursor.execute("DELETE FROM public.trunk_queue WHERE name = %s",
(name, ))
return size
def close(self):
self.trunk.close()
def __init__(self, dsn):
self.trunk = Trunk(dsn)
def setUp(self):
dsn = os.environ.get("DATABASE_URL")
self.listener = Trunk(dsn or "postgres://localhost/trunk")
self.notifier = Trunk(dsn or "postgres://localhost/trunk")
class TrunkTest(TestCase):
def setUp(self):
dsn = os.environ.get("DATABASE_URL")
self.listener = Trunk(dsn or "postgres://localhost/trunk")
self.notifier = Trunk(dsn or "postgres://localhost/trunk")
def test_get(self):
self.listener.listen("trunk_get")
self.notifier. notify("trunk_get", "payload")
channel, payload = self.listener.get("trunk_get")
self.assertEqual(channel, "trunk_get")
self.assertEqual(payload, "payload")
def test_listen(self):
self.listener.listen("trunk_listen")
self.assertTrue("trunk_listen" in self.listener.channels())
def test_unlisten(self):
self.listener.listen("trunk_channels")
self.assertTrue("trunk_channels" in self.listener.channels())
self.listener.unlisten("trunk_channels")
self.assertTrue("trunk_channels" not in self.listener.channels())
def tearDown(self):
self.listener.close()
self.notifier.close()
class PGQueue(object):
def __init__(self, dsn):
self.trunk = Trunk(dsn)
def create(self, name):
self.trunk.listen(name)
# This forces db trigger to resend notifications about pending messages.
with self.trunk.cursor() as cursor:
cursor.execute("UPDATE trunk_queue SET locked_at = NULL WHERE name = %s AND locked_at IS NULL", (name, ))
def get(self, name, block=True, timeout=None):
channel, payload = self.trunk.get(name, block=block, timeout=timeout)
with self.trunk.cursor() as cursor:
cursor.execute('UPDATE trunk_queue SET locked_at = (CURRENT_TIMESTAMP) '
'WHERE id = %s AND name = %s AND locked_at is NULL', (payload, name))
row_count = cursor.rowcount
if not row_count:
raise Empty()
cursor.execute("SELECT id, message FROM trunk_queue WHERE id = %s", (payload, ))
row = cursor.fetchone()
if row is None:
raise Empty()
return row
def get_nowait(self, name):
return self.get(name, block=False)
def put(self, name, message):
with self.trunk.cursor() as cursor:
cursor.execute("INSERT INTO trunk_queue (name, message) VALUES (%s, %s)", (name, message))
def empty(self, name):
return 0 == self.qsize(name)
def qsize(self, name):
with self.trunk.cursor() as cursor:
cursor.execute("SELECT COUNT(*) FROM trunk_queue WHERE name = %s", (name,))
row = cursor.fetchone()
return row[0]
def purge(self, name):
size = self.qsize(name)
with self.trunk.cursor() as cursor:
cursor.execute("DELETE FROM trunk_queue WHERE name = %s", (name,))
return size
def restore(self, message):
message_id = message._raw['message_id']
with self.trunk.cursor() as cursor:
cursor.execute('UPDATE trunk_queue SET locked_at = NULL WHERE id = %s', (message_id, ))
def close(self):
self.trunk.close()
def setUp(self):
dsn = os.environ.get("DATABASE_URL")
self.listener = Trunk(dsn or "postgres://localhost/trunk")
self.notifier = Trunk(dsn or "postgres://localhost/trunk")
class TrunkTest(TestCase):
def setUp(self):
dsn = os.environ.get("DATABASE_URL")
self.listener = Trunk(dsn or "postgres://localhost/trunk")
self.notifier = Trunk(dsn or "postgres://localhost/trunk")
def test_get(self):
self.listener.listen("trunk_get")
self.notifier.notify("trunk_get", "payload")
channel, payload = self.listener.get("trunk_get")
self.assertEqual(channel, "trunk_get")
self.assertEqual(payload, "payload")
def test_listen(self):
self.listener.listen("trunk_listen")
self.assertTrue("trunk_listen" in self.listener.channels())
def test_unlisten(self):
self.listener.listen("trunk_channels")
self.assertTrue("trunk_channels" in self.listener.channels())
self.listener.unlisten("trunk_channels")
self.assertTrue("trunk_channels" not in self.listener.channels())
def tearDown(self):
self.listener.close()
self.notifier.close()
