def _run_invalid_locking(self, wf_ex):
self._random_sleep()
with db_api.transaction():
# Load object into the session (transaction).
wf_ex = db_api.get_workflow_execution(wf_ex.id)
# It's too late to lock the object here because it's already
# been loaded into the session so there should be multiple
# threads that read the same object state so they write the
# same value into DB. As a result we won't get a result
# (object name) equal to a number of transactions.
db_api.acquire_lock(db_models.WorkflowExecution, wf_ex.id)
wf_ex.name = str(int(wf_ex.name) + 1)
return wf_ex.name
def _run_invalid_locking(self, wf_ex):
self._random_sleep()
with db_api.transaction():
# Load object into the session (transaction).
wf_ex = db_api.get_workflow_execution(wf_ex.id)
# It's too late to lock the object here because it's already
# been loaded into the session so there should be multiple
# threads that read the same object state so they write the
# same value into DB. As a result we won't get a result
# (object name) equal to a number of transactions.
db_api.acquire_lock(db_models.WorkflowExecution, wf_ex.id)
wf_ex.name = str(int(wf_ex.name) + 1)
return wf_ex.name
def _run_correct_locking(self, wf_ex):
self._random_sleep()
with db_api.transaction():
# Here we lock the object before it gets loaded into the
# session and prevent reading the same object state by
# multiple transactions. Hence the rest of the transaction
# body works atomically (in a serialized manner) and the
# result (object name) must be equal to a number of
# transactions.
db_api.acquire_lock(db_models.WorkflowExecution, wf_ex.id)
# Refresh the object.
wf_ex = db_api.get_workflow_execution(wf_ex.id)
wf_ex.name = str(int(wf_ex.name) + 1)
return wf_ex.name
def _run_correct_locking(self, wf_ex):
self._random_sleep()
with db_api.transaction():
# Here we lock the object before it gets loaded into the
# session and prevent reading the same object state by
# multiple transactions. Hence the rest of the transaction
# body works atomically (in a serialized manner) and the
# result (object name) must be equal to a number of
# transactions.
db_api.acquire_lock(db_models.WorkflowExecution, wf_ex.id)
# Refresh the object.
wf_ex = db_api.get_workflow_execution(wf_ex.id)
wf_ex.name = str(int(wf_ex.name) + 1)
return wf_ex.name
def _run_correct_locking(self, wf_ex):
self._random_sleep()
with db_api.transaction():
# Lock workflow execution and get the most up-to-date object.
wf_ex = db_api.acquire_lock(db_models.WorkflowExecution, wf_ex.id)
# Refresh the object.
db_api.get_workflow_execution(wf_ex.id)
wf_ex.name = str(int(wf_ex.name) + 1)
return wf_ex.name
def _run_correct_locking(self, wf_ex):
self._random_sleep()
with db_api.transaction():
# Lock workflow execution and get the most up-to-date object.
wf_ex = db_api.acquire_lock(db_models.WorkflowExecution, wf_ex.id)
# Refresh the object.
db_api.get_workflow_execution(wf_ex.id)
wf_ex.name = str(int(wf_ex.name) + 1)
return wf_ex.name
def _run_correct_locking(self, wf_ex):
# Set context info for the thread.
auth_context.set_ctx(test_base.get_context())
self._random_sleep()
with db_api.transaction():
# Lock workflow execution and get the most up-to-date object.
wf_ex = db_api.acquire_lock(db_models.WorkflowExecution, wf_ex.id)
# Refresh the object.
db_api.get_workflow_execution(wf_ex.id)
wf_ex.name = str(int(wf_ex.name) + 1)
return wf_ex.name
def _run_correct_locking(self, wf_ex):
# Set context info for the thread.
auth_context.set_ctx(test_base.get_context())
self._random_sleep()
with db_api.transaction():
# Lock workflow execution and get the most up-to-date object.
wf_ex = db_api.acquire_lock(db_models.WorkflowExecution, wf_ex.id)
# Refresh the object.
db_api.get_workflow_execution(wf_ex.id)
wf_ex.name = str(int(wf_ex.name) + 1)
return wf_ex.name