deprogressapi 0.3.0

basic back-end progress api for the data analytics software framework dasf

dasf-progress-api

DASF: Progress API is part of the Data Analytics Software Framework (DASF, https://git.geomar.de/digital-earth/dasf), developed at the GFZ German Research Centre for Geosciences (https://www.gfz-potsdam.de). It is funded by the Initiative and Networking Fund of the Helmholtz Association through the Digital Earth project (https://www.digitalearth-hgf.de/).

DASF: Progress API provides a light-weight tree-based structure to be sent via the DASF RCP messaging protocol. It's generic design supports deterministic as well as non-deterministic progress reports. While DASF: Messaging Python provides the necessary implementation to distribute the progress reports from the reporting backend modules, DASF: Web includes ready to use components to visualize the reported progress.

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PyPI Package deprogressapi

DASF: Progress API is released as a PyPI package called deprogressapi.

You may install it via:

pip install deprogressapi

Usage

A progress report is stored in a tree structure. So there will be one 'root' report instance containing multiple 'sub-reports'.

In order to report the progress simply add a reporter argument with type ProgressReport to the exposed method, e.g.

from deprogressapi import ProgressReport

def some_exposed_method(reporter: Optional[ProgressReport] = ProgressReport(
                          step_message="some progress message")) -> str:

    # ...

For a report instance new subreports can be created via the create_subreport method. Each created report is published (sent to the requesting client) automatically upon creation and on completion.

# create a subreport
sub_report = root_report.create_subreport(step_message="Calculating something")

# execute some logic
# ...

# mark the sub-report as compelte
sub_report.complete()

All sub-reports are again instances of ProgressReport, so you can create more sub-reports for each.

error handling

In order to report an error, you provide an error status argument to the complete method. The corresponding error message can be set via the reports step_message field.

from deprogressapi.base import Status

# ...
# some code that raises an exception
# ...
except Exception as e:
    error = str(e)
    progress_report.step_message = "error '{msg}': {err}".format(msg=progress_report.step_message, err=error)
    progress_report.complete(Status.ERROR)

Recommended Software Citation

Eggert, Daniel; Dransch, Doris (2021): DASF: Progress API: A progress reporting structure for the data analytics software framework. V. v0.1.4. GFZ Data Services. https://doi.org/10.5880/GFZ.1.4.2021.007

License

Copyright 2021 Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany / DASF Data Analytics Software Framework

Licensed under the Apache License, Version 2.0 (the "License");
you may not use these files except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Contact

Dr.-Ing. Daniel Eggert
eMail: [e-mail]

Helmholtz Centre Potsdam GFZ German Research Centre for Geoscienes
Section 1.4 Remote Sensing & Geoinformatics
Telegrafenberg
14473 Potsdam
Germany