def test_queue_pool(self):
listener = _TestListener()
pool = ConnectionPool(pool_size=5, max_overflow=5, recycle=10000,
prefill=True, pool_timeout=0.1, timeout=1,
keyspace='PycassaTestKeyspace', credentials=_credentials,
listeners=[listener], use_threadlocal=False)
conns = []
for i in range(10):
conns.append(pool.get())
assert_equal(listener.connect_count, 10)
assert_equal(listener.checkout_count, 10)
# Pool is maxed out now
assert_raises(NoConnectionAvailable, pool.get)
assert_equal(listener.connect_count, 10)
assert_equal(listener.max_count, 1)
for i in range(0, 5):
pool.return_conn(conns[i])
assert_equal(listener.close_count, 0)
assert_equal(listener.checkin_count, 5)
for i in range(5, 10):
pool.return_conn(conns[i])
assert_equal(listener.close_count, 5)
assert_equal(listener.checkin_count, 10)
conns = []
# These connections should come from the pool
for i in range(5):
conns.append(pool.get())
assert_equal(listener.connect_count, 10)
assert_equal(listener.checkout_count, 15)
# But these will need to be made
for i in range(5):
conns.append(pool.get())
assert_equal(listener.connect_count, 15)
assert_equal(listener.checkout_count, 20)
assert_equal(listener.close_count, 5)
for i in range(10):
conns[i].return_to_pool()
assert_equal(listener.checkin_count, 20)
assert_equal(listener.close_count, 10)
assert_raises(InvalidRequestError, conns[0].return_to_pool)
assert_equal(listener.checkin_count, 20)
assert_equal(listener.close_count, 10)
print "in test:", id(conns[-1])
assert_raises(InvalidRequestError, conns[-1].return_to_pool)
assert_equal(listener.checkin_count, 20)
assert_equal(listener.close_count, 10)
pool.dispose()
assert_equal(listener.dispose_count, 1)
def test_queue_threadlocal_failover(self):
listener = _TestListener()
pool = ConnectionPool(pool_size=1, max_overflow=0, recycle=10000,
prefill=True, timeout=0.05,
keyspace='PycassaTestKeyspace', credentials=_credentials,
listeners=[listener], use_threadlocal=True,
server_list=['localhost:9160', 'localhost:9160'])
cf = ColumnFamily(pool, 'Standard1')
for i in range(1,5):
conn = pool.get()
setattr(conn, 'send_batch_mutate', conn._fail_once)
conn._should_fail = True
conn.return_to_pool()
# The first insert attempt should fail, but failover should occur
# and the insert should succeed
cf.insert('key', {'col': 'val%d' % i, 'col2': 'val'})
assert_equal(listener.failure_count, i)
assert_equal(cf.get('key'), {'col': 'val%d' % i, 'col2': 'val'})
pool.dispose()
listener.reset()
pool = ConnectionPool(pool_size=5, max_overflow=5, recycle=10000,
prefill=True, timeout=0.05,
keyspace='PycassaTestKeyspace', credentials=_credentials,
listeners=[listener], use_threadlocal=True,
server_list=['localhost:9160', 'localhost:9160'])
cf = ColumnFamily(pool, 'Standard1')
for i in range(5):
conn = pool.get()
setattr(conn, 'send_batch_mutate', conn._fail_once)
conn._should_fail = True
conn.return_to_pool()
threads = []
args=('key', {'col': 'val', 'col2': 'val'})
for i in range(5):
threads.append(threading.Thread(target=cf.insert, args=args))
threads[-1].start()
for thread in threads:
thread.join()
assert_equal(listener.failure_count, 5)
pool.dispose()
def test_queue_failure_on_retry(self):
listener = _TestListener()
pool = ConnectionPool(pool_size=5, max_overflow=5, recycle=10000,
prefill=True, max_retries=3, # allow 3 retries
keyspace='PycassaTestKeyspace', credentials=_credentials,
listeners=[listener], use_threadlocal=False,
server_list=['localhost:9160', 'localhost:9160'])
def raiser():
raise IOError
# Replace wrapper will open a connection to get the version, so if it
# fails we need to retry as with any other connection failure
pool._replace_wrapper = raiser
# Corrupt all of the connections
for i in range(5):
conn = pool.get()
setattr(conn, 'send_batch_mutate', conn._fail_once)
conn._should_fail = True
conn.return_to_pool()
cf = ColumnFamily(pool, 'Standard1')
assert_raises(MaximumRetryException, cf.insert, 'key', {'col':'val', 'col2': 'val'})
assert_equal(listener.failure_count, 4) # On the 4th failure, didn't retry
pool.dispose()
def test_pool_connection_failure(self):
listener = _TestListener()
def get_extra():
"""Make failure count adjustments based on whether or not
the permuted list starts with a good host:port"""
if listener.serv_list[0] == 'localhost:9160':
return 0
else:
return 1
pool = ConnectionPool(pool_size=5, max_overflow=5, recycle=10000,
prefill=True,
keyspace='PycassaTestKeyspace', credentials=_credentials,
timeout=0.05,
listeners=[listener], use_threadlocal=False,
server_list=['localhost:9160', 'foobar:1'])
assert_equal(listener.failure_count, 4 + get_extra())
for i in range(0,7):
pool.get()
assert_equal(listener.failure_count, 6 + get_extra())
pool.dispose()
listener.reset()
pool = ConnectionPool(pool_size=5, max_overflow=5, recycle=10000,
prefill=True,
keyspace='PycassaTestKeyspace', credentials=_credentials,
timeout=0.05,
listeners=[listener], use_threadlocal=True,
server_list=['localhost:9160', 'foobar:1'])
assert_equal(listener.failure_count, 4 + get_extra())
threads = []
for i in range(0, 7):
threads.append(threading.Thread(target=pool.get))
threads[-1].start()
for thread in threads:
thread.join()
assert_equal(listener.failure_count, 6 + get_extra())
pool.dispose()
def test_queue_threadlocal_retry_limit(self):
listener = _TestListener()
pool = ConnectionPool(pool_size=5, max_overflow=5, recycle=10000,
prefill=True, max_retries=3, # allow 3 retries
keyspace='Keyspace1', credentials=_credentials,
listeners=[listener], use_threadlocal=True,
server_list=['localhost:9160', 'localhost:9160'])
# Corrupt all of the connections
for i in range(5):
conn = pool.get()
setattr(conn, 'send_batch_mutate', conn._fail_once)
conn._should_fail = True
conn.return_to_pool()
cf = ColumnFamily(pool, 'Standard1')
assert_raises(MaximumRetryException, cf.insert, 'key', {'col':'val', 'col2': 'val'})
assert_equal(listener.failure_count, 4) # On the 4th failure, didn't retry
pool.dispose()
def test_queue_retry_limit(self):
for prefill in (True, False):
listener = _TestListener()
pool = ConnectionPool(pool_size=5, max_overflow=5, recycle=10000,
prefill=prefill, max_retries=3, # allow 3 retries
keyspace='PycassaTestKeyspace', credentials=_credentials,
listeners=[listener], use_threadlocal=False,
server_list=['localhost:9160', 'localhost:9160'])
# Corrupt all of the connections
for i in range(5):
conn = pool.get()
setattr(conn, 'send_batch_mutate', conn._fail_once)
conn._should_fail = True
conn.return_to_pool()
cf = ColumnFamily(pool, 'Standard1')
assert_raises(MaximumRetryException, cf.insert, 'key', {'col':'val', 'col2': 'val'})
assert_equal(listener.failure_count, 4) # On the 4th failure, didn't retry
pool.dispose()
def test_queue_failover(self):
for prefill in (True, False):
listener = _TestListener()
pool = ConnectionPool(pool_size=1, max_overflow=0, recycle=10000,
prefill=prefill, timeout=1,
keyspace='PycassaTestKeyspace', credentials=_credentials,
listeners=[listener], use_threadlocal=False,
server_list=['localhost:9160', 'localhost:9160'])
cf = ColumnFamily(pool, 'Standard1')
for i in range(1,5):
conn = pool.get()
setattr(conn, 'send_batch_mutate', conn._fail_once)
conn._should_fail = True
conn.return_to_pool()
# The first insert attempt should fail, but failover should occur
# and the insert should succeed
cf.insert('key', {'col': 'val%d' % i, 'col2': 'val'})
assert_equal(listener.failure_count, i)
assert_equal(cf.get('key'), {'col': 'val%d' % i, 'col2': 'val'})
pool.dispose()
def checkout_return():
conn = pool.get()
time.sleep(1)
pool.return_conn(conn)
def test_queue_pool_threadlocal(self):
listener = _TestListener()
pool = ConnectionPool(pool_size=5, max_overflow=5, recycle=10000,
prefill=True, pool_timeout=0.5, timeout=1,
keyspace='PycassaTestKeyspace', credentials=_credentials,
listeners=[listener], use_threadlocal=True)
conns = []
assert_equal(listener.connect_count, 5)
# These connections should all be the same
for i in range(10):
conns.append(pool.get())
assert_equal(listener.connect_count, 5)
assert_equal(listener.checkout_count, 1)
for i in range(0, 5):
pool.return_conn(conns[i])
assert_equal(listener.checkin_count, 1)
for i in range(5, 10):
pool.return_conn(conns[i])
assert_equal(listener.checkin_count, 1)
conns = []
assert_equal(listener.connect_count, 5)
# A single connection should come from the pool
for i in range(5):
conns.append(pool.get())
assert_equal(listener.connect_count, 5)
assert_equal(listener.checkout_count, 2)
for conn in conns:
pool.return_conn(conn)
conns = []
threads = []
listener.reset()
def checkout_return():
conn = pool.get()
time.sleep(1)
pool.return_conn(conn)
for i in range(5):
threads.append(threading.Thread(target=checkout_return))
threads[-1].start()
for thread in threads:
thread.join()
assert_equal(listener.connect_count, 0) # Still 5 connections in pool
assert_equal(listener.checkout_count, 5)
assert_equal(listener.checkin_count, 5)
# These should come from the pool
threads = []
for i in range(5):
threads.append(threading.Thread(target=checkout_return))
threads[-1].start()
for thread in threads:
thread.join()
assert_equal(listener.connect_count, 0)
assert_equal(listener.checkout_count, 10)
assert_equal(listener.checkin_count, 10)
pool.dispose()
