def get_process_instance_variable(self, process_instance_id: str,
variable_name: str):
"""
Returns the variable with the given name from the process instance with
the given process_instance_id.
Parameters:
- ``process_instance_id``: ID of the target process instance
- ``variable_name``: name of the variable to read
== Example ==
| ${variable} | Get Process Instance Variable |
| ... | process_instance_id=fcab43bc-b970-11eb-be75-0242ac110002 |
| ... | variable_name=foo |
See also:
https://docs.camunda.org/manual/7.5/reference/rest/process-instance/variables/get-single-variable/
"""
with self._shared_resources.api_client as api_client:
api_instance: ProcessInstanceApi = openapi_client.ProcessInstanceApi(
api_client)
try:
response = api_instance.get_process_instance_variable(
id=process_instance_id, var_name=variable_name)
except ApiException as e:
logger.error(f'Failed to get variable {variable_name} from '
f'process instance {process_instance_id}:\n{e}')
return response
def download_file_from_variable(self, variable_name: str) -> str:
"""
For performance reasons, files are not retrieved automatically during `fetch workload`. If your task requires
a file that is attached to a process instance, you need to download the file explicitly.
Example:
| ${variables} | *fetch workload* | _first_task_in_demo_ |
| | *Dictionary Should Contain Key* | _${variables}_ | _my_file_ |
| ${file} | *Download File From Variable* | ${variables}[my_file] | |
"""
if not self.FETCH_RESPONSE:
logger.warn(
'Could not download file for variable. Maybe you did not fetch and lock a workitem before?'
)
else:
with self._shared_resources.api_client as api_client:
api_instance = openapi_client.ProcessInstanceApi(api_client)
try:
response = api_instance.get_process_instance_variable_binary(
id=self.FETCH_RESPONSE.process_instance_id,
var_name=variable_name)
logger.debug(response)
except ApiException as e:
raise ApiException(
f"Exception when calling ExternalTaskApi->get_process_instance_variable_binary: {e}\n"
)
return response
def delete_process_instance(self, process_instance_id):
"""
USE WITH CARE: Deletes a process instance by id. All data in this process instance will be lost.
"""
with self._shared_resources.api_client as api_client:
api_instance = openapi_client.ProcessInstanceApi(api_client)
try:
api_instance.delete_process_instance(id=process_instance_id)
except ApiException as e:
logger.error(
f'Failed to delete process instance {process_instance_id}:\n{e}'
)
raise e
def download_file_from_variable(self, variable_name: str) -> str:
if not self.FETCH_RESPONSE:
logger.warn(
'Could not download file for variable. Maybe you did not fetch and lock a workitem before?'
)
else:
with self._shared_resources.api_client as api_client:
api_instance = openapi_client.ProcessInstanceApi(api_client)
try:
response = api_instance.get_process_instance_variable_binary(
id=self.FETCH_RESPONSE.process_instance_id,
var_name=variable_name)
logger.debug(response)
except ApiException as e:
logger.error(
f"Exception when calling ExternalTaskApi->get_process_instance_variable_binary: {e}\n"
)
return response
def get_activity_instance(self, **kwargs):
"""
Returns an Activity Instance (Tree) for a given process instance.
== Example ==
| ${tree} | Get Activity Instance | id=fcab43bc-b970-11eb-be75-0242ac110002 |
https://docs.camunda.org/manual/7.5/reference/rest/process-instance/get-activity-instances/
"""
with self._shared_resources.api_client as api_client:
api_instance: ProcessInstanceApi = openapi_client.ProcessInstanceApi(
api_client)
try:
response = api_instance.get_activity_instance_tree(**kwargs)
except ApiException as e:
logger.error(
f'failed to get activity tree for process instance {kwargs}:\n{e}'
)
return response
def get_all_process_instances(self, process_definition_key):
"""
Returns a list of process instances that are active for a certain process definition identified by key.
"""
with self._shared_resources.api_client as api_client:
api_instance: ProcessInstanceApi = openapi_client.ProcessInstanceApi(
api_client)
try:
response: List[
ProcessInstanceDto] = api_instance.get_process_instances(
process_definition_key=process_definition_key,
active='true')
except ApiException as e:
logger.error(
f'Failed to get process instances of process {process_definition_key}:\n{e}'
)
raise e
return [process_instance.to_dict() for process_instance in response]
def get_process_instance_variable(self,
process_instance_id: str,
variable_name: str,
auto_type_conversion: bool = True):
"""
Returns the variable with the given name from the process instance with
the given process_instance_id.
Parameters:
- ``process_instance_id``: ID of the target process instance
- ``variable_name``: name of the variable to read
- ``auto_type_conversion``: Converts JSON structures automatically in to python data structures. Default: True. When False, values are not retrieved for JSON variables, but metadata is. Only useful when you want to verify that Camunda holds certain data types.%
== Example ==
| ${variable} | Get Process Instance Variable |
| ... | process_instance_id=fcab43bc-b970-11eb-be75-0242ac110002 |
| ... | variable_name=foo |
See also:
https://docs.camunda.org/manual/latest/reference/rest/process-instance/variables/get-single-variable/
"""
with self._shared_resources.api_client as api_client:
api_instance: ProcessInstanceApi = openapi_client.ProcessInstanceApi(
api_client)
try:
response = api_instance.get_process_instance_variable(
id=process_instance_id,
var_name=variable_name,
deserialize_value=not auto_type_conversion)
except ApiException as e:
raise ApiException(
f'Failed to get variable {variable_name} from '
f'process instance {process_instance_id}:\n{e}')
if auto_type_conversion:
return CamundaResources.convert_variable_dto(response)
return response
def get_process_instances(self, **kwargs):
"""
Queries Camunda for process instances that match certain criteria.
*Be aware, that boolean value must be strings either 'true' or 'false'*
== Arguments ==
| async_req | execute request asynchronously |
| sort_by | Sort the results lexicographically by a given criterion. Must be used in conjunction with the sortOrder parameter. |
| sort_order | Sort the results in a given order. Values may be asc for ascending order or desc for descending order. Must be used in conjunction with the sortBy parameter. |
| first_result | Pagination of results. Specifies the index of the first result to return. |
| max_results | Pagination of results. Specifies the maximum number of results to return. Will return less results if there are no more results left. |
| process_instance_ids | Filter by a comma-separated list of process instance ids. |
| business_key | Filter by process instance business key. |
| business_key_like | Filter by process instance business key that the parameter is a substring of. |
| case_instance_id | Filter by case instance id. |
| process_definition_id | Filter by the deployment the id belongs to. |
| process_definition_key | Filter by the key of the process definition the instances run on. |
| process_definition_key_in | Filter by a comma-separated list of process definition keys. A process instance must have one of the given process definition keys. |
| process_definition_key_not_in | Exclude instances by a comma-separated list of process definition keys. A process instance must not have one of the given process definition keys. |
| deployment_id | Filter by the deployment the id belongs to. |
| super_process_instance | Restrict query to all process instances that are sub process instances of the given process instance. Takes a process instance id. |
| sub_process_instance | Restrict query to all process instances that have the given process instance as a sub process instance. Takes a process instance id. |
| super_case_instance | Restrict query to all process instances that are sub process instances of the given case instance. Takes a case instance id. |
| sub_case_instance | Restrict query to all process instances that have the given case instance as a sub case instance. Takes a case instance id. |
| active | Only include active process instances. Value may only be true, as false is the default behavior. |
| suspended | Only include suspended process instances. Value may only be true, as false is the default behavior. |
| with_incident | Filter by presence of incidents. Selects only process instances that have an incident. |
| incident_id | Filter by the incident id. |
| incident_type | Filter by the incident type. See the [User Guide](https://docs.camunda.org/manual/latest/user-guide/process-engine/incidents/#incident-types) for a list of incident types. |
| incident_message | Filter by the incident message. Exact match. |
| incident_message_like | Filter by the incident message that the parameter is a substring of. |
| tenant_id_in | Filter by a comma-separated list of tenant ids. A process instance must have one of the given tenant ids. |
| without_tenant_id | Only include process instances which belong to no tenant. |
| process_definition_without_tenant_id | Only include process instances which process definition has no tenant id. |
| activity_id_in | Filter by a comma-separated list of activity ids. A process instance must currently wait in a leaf activity with one of the given activity ids. |
| root_process_instances | Restrict the query to all process instances that are top level process instances. |
| leaf_process_instances | Restrict the query to all process instances that are leaf instances. (i.e. don't have any sub instances). |
| variables | Only include process instances that have variables with certain values. Variable filtering expressions are comma-separated and are structured as follows: A valid parameter value has the form `key_operator_value`. `key` is the variable name, `operator` is the comparison operator to be used and `value` the variable value. **Note**: Values are always treated as String objects on server side. Valid `operator` values are: `eq` - equal to; `neq` - not equal to; `gt` - greater than; `gteq` - greater than or equal to; `lt` - lower than; `lteq` - lower than or equal to; `like`. `key` and `value` may not contain underscore or comma characters. |
| variable_names_ignore_case | Match all variable names in this query case-insensitively. If set to true variableName and variablename are treated as equal. |
| variable_values_ignore_case | Match all variable values in this query case-insensitively. If set to true variableValue and variablevalue are treated as equal. |
| _preload_content | if False, the urllib3.HTTPResponse object will
be returned without reading/decoding response
data. Default is True. |
| _request_timeout | timeout setting for this request. If one
number provided, it will be total request
timeout. It can also be a pair (tuple) of
(connection, read) timeouts. |
"""
with self._shared_resources.api_client as api_client:
api_instance: ProcessInstanceApi = openapi_client.ProcessInstanceApi(
api_client)
try:
response: List[
ProcessInstanceDto] = api_instance.get_process_instances(
**kwargs)
except ApiException as e:
raise ApiException(
f'Failed to get process instances of process:\n{e}')
return [process_instance.to_dict() for process_instance in response]
