| 143 | |
| 144 | @celery_app.task(name=f"background_callback_{key}") |
| 145 | def job_fn( |
| 146 | result_key, progress_key, user_callback_args, context=None |
| 147 | ): # pylint: disable=too-many-statements |
| 148 | def _set_progress(progress_value): |
| 149 | if not isinstance(progress_value, (list, tuple)): |
| 150 | progress_value = [progress_value] |
| 151 | |
| 152 | cache.set(progress_key, json.dumps(progress_value, cls=PlotlyJSONEncoder)) |
| 153 | |
| 154 | maybe_progress = [_set_progress] if progress else [] |
| 155 | |
| 156 | def _set_props(_id, props): |
| 157 | cache.set( |
| 158 | f"{result_key}-set_props", |
| 159 | json.dumps({_id: props}, cls=PlotlyJSONEncoder), |
| 160 | ) |
| 161 | |
| 162 | ctx = copy_context() |
| 163 | |
| 164 | def run(): |
| 165 | c = AttributeDict(**context) # type: ignore[reportCallIssue] |
| 166 | c.ignore_register_page = False |
| 167 | c.updated_props = ProxySetProps(_set_props) |
| 168 | context_value.set(c) |
| 169 | errored = False |
| 170 | user_callback_output = None # to help type checking |
| 171 | try: |
| 172 | if isinstance(user_callback_args, dict): |
| 173 | user_callback_output = fn(*maybe_progress, **user_callback_args) |
| 174 | elif isinstance(user_callback_args, (list, tuple)): |
| 175 | user_callback_output = fn(*maybe_progress, *user_callback_args) |
| 176 | else: |
| 177 | user_callback_output = fn(*maybe_progress, user_callback_args) |
| 178 | except PreventUpdate: |
| 179 | # Put NoUpdate dict directly to avoid circular imports. |
| 180 | errored = True |
| 181 | cache.set( |
| 182 | result_key, |
| 183 | json.dumps( |
| 184 | {"_dash_no_update": "_dash_no_update"}, cls=PlotlyJSONEncoder |
| 185 | ), |
| 186 | ) |
| 187 | except Exception as err: # pylint: disable=broad-except |
| 188 | errored = True |
| 189 | cache.set( |
| 190 | result_key, |
| 191 | json.dumps( |
| 192 | { |
| 193 | "background_callback_error": { |
| 194 | "msg": str(err), |
| 195 | "tb": traceback.format_exc(), |
| 196 | } |
| 197 | }, |
| 198 | ), |
| 199 | ) |
| 200 | |
| 201 | if not errored: |
| 202 | cache.set( |