[python] Initiate document for pydolphinscheduler (#8005)

.github/workflows/py-ci.yml

@@ -97,3 +97,20 @@ jobs:
           pip install -e .
       - name: Run Tests && Check coverage
         run: coverage run && coverage report
+  doc-build:
+    name: Document Build Test
+    needs: pytest
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python 3.7
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.7
+      - name: Install Development Dependences
+        run: |
+          pip install -r requirements_dev.txt
+          pip install -e .
+      - name: Test Build Document
+        working-directory: dolphinscheduler-python/pydolphinscheduler/docs
+        run: make clean && make html

.licenserc.yaml

@@ -45,5 +45,6 @@ header:
     - '.github/actions/comment-on-issue/**'
     - '.github/actions/reviewdog-setup/**'
     - '.github/actions/translate-on-issue/**'
+    - '**/.gitkeep'
 
   comment: on-failure

dolphinscheduler-python/pydolphinscheduler/.flake8

@@ -35,3 +35,4 @@ ignore =
     W503   # W503: Line breaks before binary operators
 per-file-ignores =
     src/pydolphinscheduler/side/__init__.py:F401
+    src/pydolphinscheduler/tasks/__init__.py:F401

dolphinscheduler-python/pydolphinscheduler/docs/Makefile

@@ -0,0 +1,39 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file 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.
+
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+
+# Add opts `turn warnings into errors` strict sphinx-build behavior
+SPHINXOPTS    ?= -W
+SPHINXBUILD   ?= sphinx-build
+SOURCEDIR     = source
+BUILDDIR      = build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

dolphinscheduler-python/pydolphinscheduler/docs/make.bat

@@ -0,0 +1,54 @@
+REM Licensed to the Apache Software Foundation (ASF) under one
+REM or more contributor license agreements.  See the NOTICE file
+REM distributed with this work for additional information
+REM regarding copyright ownership.  The ASF licenses this file
+REM to you under the Apache License, Version 2.0 (the
+REM "License"); you may not use this file except in compliance
+REM with the License.  You may obtain a copy of the License at
+REM 
+REM   http://www.apache.org/licenses/LICENSE-2.0
+REM 
+REM Unless required by applicable law or agreed to in writing,
+REM software distributed under the License is distributed on an
+REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+REM KIND, either express or implied.  See the License for the
+REM specific language governing permissions and limitations
+REM under the License.
+
+@ECHO OFF
+
+pushd %~dp0
+
+REM Command file for Sphinx documentation
+
+if "%SPHINXBUILD%" == "" (
+	set SPHINXBUILD=sphinx-build
+)
+set SOURCEDIR=source
+set BUILDDIR=build
+REM Add opts `turn warnings into errors` strict sphinx-build behavior
+set SPHINXOPTS=-W
+
+if "%1" == "" goto help
+
+%SPHINXBUILD% >NUL 2>NUL
+if errorlevel 9009 (
+	echo.
+	echo.The 'sphinx-build' command was not found. Make sure you have Sphinx
+	echo.installed, then set the SPHINXBUILD environment variable to point
+	echo.to the full path of the 'sphinx-build' executable. Alternatively you
+	echo.may add the Sphinx directory to PATH.
+	echo.
+	echo.If you don't have Sphinx installed, grab it from
+	echo.https://www.sphinx-doc.org/
+	exit /b 1
+)
+
+%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+goto end
+
+:help
+%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+
+:end
+popd

dolphinscheduler-python/pydolphinscheduler/docs/source/api.rst

@@ -0,0 +1,47 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+API
+===
+
+Core
+----
+
+.. automodule:: pydolphinscheduler.core
+  :inherited-members:
+
+Sides
+-----
+
+.. automodule:: pydolphinscheduler.side
+  :inherited-members:
+
+Tasks
+-----
+
+.. automodule:: pydolphinscheduler.tasks
+  :inherited-members:
+
+Constants
+---------
+
+.. automodule:: pydolphinscheduler.constants
+
+Exceptions
+----------
+
+.. automodule:: pydolphinscheduler.exceptions

dolphinscheduler-python/pydolphinscheduler/docs/source/concept.rst

@@ -0,0 +1,151 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+Concepts
+========
+
+In this section, you would know the core concepts of *PyDolphinScheduler*.
+
+Process Definition
+------------------
+
+Process definition describe the whole things except `tasks`_ and `tasks dependence`_, which including
+name, schedule interval, schedule start time and end time. You would know scheduler 
+
+Process definition could be initialized in normal assign statement or in context manger.
+
+.. code-block:: python
+
+   # Initialization with assign statement
+   pd = ProcessDefinition(name="my first process definition")
+
+   # Or context manger 
+   with ProcessDefinition(name="my first process definition") as pd:
+       pd.submit()
+
+Process definition is the main object communicate between *PyDolphinScheduler* and DolphinScheduler daemon.
+After process definition and task is be declared, you could use `submit` and `run` notify server your definition.
+
+If you just want to submit your definition and create workflow, without run it, you should use attribute `submit`.
+But if you want to run the workflow after you submit it, you could use attribute `run`.
+
+.. code-block:: python
+
+   # Just submit definition, without run it
+   pd.submit()
+   
+   # Both submit and run definition
+   pd.run()
+
+Schedule
+~~~~~~~~
+
+We use parameter `schedule` determine the schedule interval of workflow, *PyDolphinScheduler* support seven
+asterisks expression, and each of the meaning of position as below
+
+.. code-block:: text
+
+    * * * * * * *
+    ┬ ┬ ┬ ┬ ┬ ┬ ┬
+    │ │ │ │ │ │ │
+    │ │ │ │ │ │ └─── year
+    │ │ │ │ │ └───── day of week (0 - 7) (0 to 6 are Sunday to Saturday, or use names; 7 is Sunday, the same as 0)
+    │ │ │ │ └─────── month (1 - 12)
+    │ │ │ └───────── day of month (1 - 31)
+    │ │ └─────────── hour (0 - 23)
+    │ └───────────── min (0 - 59)
+    └─────────────── second (0 - 59)
+
+Here we add some example crontab:
+
+- `0 0 0 * * ? *`: Workflow execute every day at 00:00:00.
+- `10 2 * * * ? *`: Workflow execute hourly day at ten pass two.
+- `10,11 20 0 1,2 * ? *`: Workflow execute first and second day of month at 00:20:10 and 00:20:11.
+
+Tenant
+~~~~~~
+
+Tenant is the user who run task command in machine or in virtual machine. it could be assign by simple string.
+
+.. code-block:: python
+
+   # 
+   pd = ProcessDefinition(name="process definition tenant", tenant="tenant_exists")
+
+.. note::
+
+   Make should tenant exists in target machine, otherwise it will raise an error when you try to run command
+
+Tasks
+-----
+
+Task is the minimum unit running actual job, and it is nodes of DAG, aka directed acyclic graph. You could define
+what you want to in the task. It have some required parameter to make uniqueness and definition.
+
+Here we use :py:meth:`pydolphinscheduler.tasks.Shell` as example, parameter `name` and `command` is required and must be provider. Parameter
+`name` set name to the task, and parameter `command` declare the command you wish to run in this task.
+
+.. code-block:: python
+
+   # We named this task as "shell", and just run command `echo shell task`
+   shell_task = Shell(name="shell", command="echo shell task")
+
+If you want to see all type of tasks, you could see :doc:`tasks/index`.
+
+Tasks Dependence
+~~~~~~~~~~~~~~~~
+
+You could define many tasks in on single `Process Definition`_. If all those task is in parallel processing,
+then you could leave them alone without adding any additional information. But if there have some tasks should
+not be run unless pre task in workflow have be done, we should set task dependence to them. Set tasks dependence
+have two mainly way and both of them is easy. You could use bitwise operator `>>` and `<<`, or task attribute 
+`set_downstream` and `set_upstream` to do it.
+
+.. code-block:: python
+
+   # Set task1 as task2 upstream
+   task1 >> task2
+   # You could use attribute `set_downstream` too, is same as `task1 >> task2`
+   task1.set_downstream(task2)
+   
+   # Set task1 as task2 downstream
+   task1 << task2
+   # It is same as attribute `set_upstream`
+   task1.set_upstream(task2)
+   
+   # Beside, we could set dependence between task and sequence of tasks,
+   # we set `task1` is upstream to both `task2` and `task3`. It is useful
+   # for some tasks have same dependence.
+   task1 >> [task2, task3]
+
+Task With Process Definition
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+In most of data orchestration cases, you should assigned attribute `process_definition` to task instance to
+decide workflow of task. You could set `process_definition` in both normal assign or in context manger mode
+
+.. code-block:: python
+
+   # Normal assign, have to explicit declaration and pass `ProcessDefinition` instance to task
+   pd = ProcessDefinition(name="my first process definition")
+   shell_task = Shell(name="shell", command="echo shell task", process_definition=pd)
+
+   # Context manger, `ProcessDefinition` instance pd would implicit declaration to task
+   with ProcessDefinition(name="my first process definition") as pd:
+       shell_task = Shell(name="shell", command="echo shell task",
+
+With both `Process Definition`_, `Tasks`_  and `Tasks Dependence`_, we could build a workflow with multiple tasks.

dolphinscheduler-python/pydolphinscheduler/docs/source/conf.py

@@ -0,0 +1,88 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file 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.
+
+# Configuration file for the Sphinx documentation builder.
+#
+# This file only contains a selection of the most common options. For a full
+# list see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+# -- Path setup --------------------------------------------------------------
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#
+# import os
+# import sys
+# sys.path.insert(0, os.path.abspath('.'))
+
+
+# -- Project information -----------------------------------------------------
+
+project = "pydolphinscheduler"
+copyright = "2022, apache"
+author = "apache"
+
+# The full version, including alpha/beta/rc tags
+release = "0.0.1"
+
+
+# -- General configuration ---------------------------------------------------
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    # Measures durations of Sphinx processing
+    "sphinx.ext.duration",
+    # Semi-automatic make docstrings to document
+    "sphinx.ext.autodoc",
+    "sphinx.ext.viewcode",
+    "sphinx.ext.autosectionlabel",
+    "sphinx_rtd_theme",
+]
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ["_templates"]
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This pattern also affects html_static_path and html_extra_path.
+exclude_patterns = []
+
+autodoc_default_options = {
+    "members": True,
+    "show-inheritance": True,
+    "private-members": True,
+    "undoc-members": True,
+    "member-order": "groupwise",
+}
+
+autosectionlabel_prefix_document = True
+
+# -- Options for HTML output -------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+html_theme = "sphinx_rtd_theme"
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ["_static"]

dolphinscheduler-python/pydolphinscheduler/docs/source/index.rst

@@ -0,0 +1,42 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+PyDolphinScheduler
+==================
+
+**PyDolphinScheduler** is Python API for `Apache DolphinScheduler <https://dolphinscheduler.apache.org>`_,
+which allow you definition your workflow by Python code, aka workflow-as-codes.
+
+I could go and find how to :ref:`install <start:getting started>` the project. Or if you want to see simply example
+then go and see :doc:`tutorial` for more detail.
+
+
+.. toctree::
+   :maxdepth: 2
+
+   start
+   tutorial
+   concept
+   tasks/index
+   api
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`

dolphinscheduler-python/pydolphinscheduler/docs/source/start.rst

@@ -0,0 +1,113 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+Getting Started
+===============
+
+To get started with *PyDolphinScheduler* you must ensure python and pip
+installed on your machine, if you're already set up, you can skip straight
+to `Installing PyDolphinScheduler`_, otherwise please continue with
+`Installing Python`_.
+
+Installing Python
+-----------------
+
+How to install `python` and `pip` depends on what operating system
+you're using. The python wiki provides up to date
+`instructions for all platforms here`_. When you entering the website
+and choice your operating system, you would be offered the choice and
+select python version. *PyDolphinScheduler* recommend use version above
+Python 3.6 and we highly recommend you install *Stable Releases* instead
+of *Pre-releases*.
+
+After you have download and installed Python, you should open your terminal,
+typing and running :code:`python --version` to check whether the installation
+is correct or not. If all thing good, you could see the version in console
+without error(here is a example after Python 3.8.7 installed)
+
+.. code-block:: bash
+
+    $ python --version
+    Python 3.8.7
+
+Installing PyDolphinScheduler
+-----------------------------
+
+After Python is already installed on your machine following section
+`installing Python`_, it easy to *PyDolphinScheduler* by pip.
+
+.. code-block:: bash
+
+    $ pip install apache-dolphinscheduler
+
+The latest version of *PyDolphinScheduler* would be installed after you run above
+command in your terminal. You could go and `start Python Gateway Server`_ to finish
+the prepare, and then go to :doc:`tutorial` to make your hand dirty. But if you
+want to install the unreleased version of *PyDolphinScheduler*, you could go and see
+section `installing PyDolphinScheduler in dev`_ for more detail.
+
+Installing PyDolphinScheduler In Dev
+------------------------------------
+
+Because the project is developing and some of the features still not release.
+If you want to try some thing unreleased you could install from the source code
+which we hold in GitHub
+
+.. code-block:: bash
+
+    # Clone Apache DolphinScheduler repository
+    $ git clone git@github.com:apache/dolphinscheduler.git
+    # Install PyDolphinScheduler in develop mode
+    $ cd dolphinscheduler-python/pydolphinscheduler && pip install -e .
+
+After you installed *PyDolphinScheduler*, please remember `start Python Gateway Server`_
+which waiting for *PyDolphinScheduler*'s workflow definition require.
+
+Start Python Gateway Server
+---------------------------
+
+Since **PyDolphinScheduler** is Python API for `Apache DolphinScheduler`_, it
+could define workflow and tasks structure, but could not run it unless you
+`install Apache DolphinScheduler`_ and start Python gateway server. We only
+and some key steps here and you could go `install Apache DolphinScheduler`_
+for more detail
+
+.. code-block:: bash
+
+    # Start pythonGatewayServer
+    $ ./bin/dolphinscheduler-daemon.sh start pythonGatewayServer
+
+To check whether the server is alive or not, you could run :code:`jps`. And
+the server is health if keyword `PythonGatewayServer` in the console. 
+
+.. code-block:: bash
+
+    $ jps
+    ....
+    201472 PythonGatewayServer
+    ....
+
+What's More
+-----------
+
+If you do not familiar with *PyDolphinScheduler*, you could go to :doc:`tutorial`
+and see how it work. But if you already know the inside of *PyDolphinScheduler*,
+maybe you could go and play with all :doc:`tasks/index` *PyDolphinScheduler* supports.
+
+.. _`instructions for all platforms here`: https://wiki.python.org/moin/BeginnersGuide/Download
+.. _`Apache DolphinScheduler`: https://dolphinscheduler.apache.org
+.. _`install Apache DolphinScheduler`: https://dolphinscheduler.apache.org/en-us/docs/latest/user_doc/guide/installation/standalone.html

dolphinscheduler-python/pydolphinscheduler/docs/source/tasks/condition.rst

@@ -0,0 +1,33 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+Condition
+=========
+
+A condition task type's example and dive into information of **PyDolphinScheduler**.
+
+Example
+-------
+
+.. literalinclude:: ../../../examples/task_condition_example.py
+   :start-after: [start workflow_declare]
+   :end-before: [end workflow_declare]
+
+Dive Into
+---------
+
+.. automodule:: pydolphinscheduler.tasks.condition

dolphinscheduler-python/pydolphinscheduler/docs/source/tasks/datax.rst

@@ -0,0 +1,33 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+Datax
+=====
+
+A DataX task type's example and dive into information of **PyDolphinScheduler**.
+
+Example
+-------
+
+.. literalinclude:: ../../../examples/task_datax_example.py
+   :start-after: [start workflow_declare]
+   :end-before: [end workflow_declare]
+
+Dive Into
+---------
+
+.. automodule:: pydolphinscheduler.tasks.datax

dolphinscheduler-python/pydolphinscheduler/docs/source/tasks/dependent.rst

@@ -0,0 +1,33 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+Dependent
+=========
+
+A dependent task type's example and dive into information of **PyDolphinScheduler**.
+
+Example
+-------
+
+.. literalinclude:: ../../../examples/task_dependent_example.py
+   :start-after: [start workflow_declare]
+   :end-before: [end workflow_declare]
+
+Dive Into
+---------
+
+.. automodule:: pydolphinscheduler.tasks.dependent

dolphinscheduler-python/pydolphinscheduler/docs/source/tasks/flink.rst

@@ -0,0 +1,33 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+Flink
+=====
+
+A flink task type's example and dive into information of **PyDolphinScheduler**.
+
+Example
+-------
+
+.. literalinclude:: ../../../examples/task_flink_example.py
+   :start-after: [start workflow_declare]
+   :end-before: [end workflow_declare]
+
+Dive Into
+---------
+
+.. automodule:: pydolphinscheduler.tasks.flink

dolphinscheduler-python/pydolphinscheduler/docs/source/tasks/http.rst

@@ -0,0 +1,21 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+HTTP
+====
+
+.. automodule:: pydolphinscheduler.tasks.http

dolphinscheduler-python/pydolphinscheduler/docs/source/tasks/index.rst

@@ -0,0 +1,41 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+Tasks
+=====
+
+In this section 
+
+.. toctree::
+   :maxdepth: 1
+   
+   shell
+   sql
+   python
+   http
+
+   switch
+   condition
+   dependent
+
+   spark
+   flink
+   map_reduce
+   procedure
+
+   datax
+   sub_process

dolphinscheduler-python/pydolphinscheduler/docs/source/tasks/map_reduce.rst

@@ -0,0 +1,34 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+Map Reduce
+==========
+
+
+A Map Reduce task type's example and dive into information of **PyDolphinScheduler**.
+
+Example
+-------
+
+.. literalinclude:: ../../../examples/task_map_reduce_example.py
+   :start-after: [start workflow_declare]
+   :end-before: [end workflow_declare]
+
+Dive Into
+---------
+
+.. automodule:: pydolphinscheduler.tasks.map_reduce

dolphinscheduler-python/pydolphinscheduler/docs/source/tasks/procedure.rst

@@ -0,0 +1,21 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+Procedure
+=========
+
+.. automodule:: pydolphinscheduler.tasks.procedure

dolphinscheduler-python/pydolphinscheduler/docs/source/tasks/python.rst

@@ -0,0 +1,21 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+Python
+======
+
+.. automodule:: pydolphinscheduler.tasks.python

dolphinscheduler-python/pydolphinscheduler/docs/source/tasks/shell.rst

@@ -0,0 +1,33 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+Shell
+=====
+
+A shell task type's example and dive into information of **PyDolphinScheduler**.
+
+Example
+-------
+
+.. literalinclude:: ../../../examples/tutorial.py
+   :start-after: [start workflow_declare]
+   :end-before: [end task_relation_declare]
+
+Dive Into
+---------
+
+.. automodule:: pydolphinscheduler.tasks.shell

dolphinscheduler-python/pydolphinscheduler/docs/source/tasks/spark.rst

@@ -0,0 +1,33 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+Spark
+=====
+
+A spark task type's example and dive into information of **PyDolphinScheduler**.
+
+Example
+-------
+
+.. literalinclude:: ../../../examples/task_spark_example.py
+   :start-after: [start workflow_declare]
+   :end-before: [end workflow_declare]
+
+Dive Into
+---------
+
+.. automodule:: pydolphinscheduler.tasks.spark

dolphinscheduler-python/pydolphinscheduler/docs/source/tasks/sql.rst

@@ -0,0 +1,21 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+SQL
+===
+
+.. automodule:: pydolphinscheduler.tasks.sql

dolphinscheduler-python/pydolphinscheduler/docs/source/tasks/sub_process.rst

@@ -0,0 +1,21 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+Sub Process
+===========
+
+.. automodule:: pydolphinscheduler.tasks.sub_process

dolphinscheduler-python/pydolphinscheduler/docs/source/tasks/switch.rst

@@ -0,0 +1,33 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+Switch
+======
+
+A switch task type's example and dive into information of **PyDolphinScheduler**.
+
+Example
+-------
+
+.. literalinclude:: ../../../examples/task_switch_example.py
+   :start-after: [start workflow_declare]
+   :end-before: [end workflow_declare]
+
+Dive Into
+---------
+
+.. automodule:: pydolphinscheduler.tasks.switch

dolphinscheduler-python/pydolphinscheduler/docs/source/tutorial.rst

@@ -0,0 +1,150 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file 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.
+
+Tutorial
+========
+
+This tutorial show you the basic concept of *PyDolphinScheduler* and tell all
+things you should know before you submit or run your first workflow. If you
+still not install *PyDolphinScheduler* and start Apache DolphinScheduler, you
+could go and see :ref:`how to getting start PyDolphinScheduler <start:getting started>`
+
+Overview of Tutorial
+--------------------
+
+Here have an overview of our tutorial, and it look a little complex but do not
+worry about that because we explain this example below as detailed as possible.
+
+.. literalinclude:: ../../examples/tutorial.py
+   :start-after: [start tutorial]
+   :end-before: [end tutorial]
+
+Import Necessary Module
+-----------------------
+
+First of all, we should importing necessary module which we would use later just
+like other Python package. We just create a minimum demo here, so we just import
+:class:`pydolphinscheduler.core.process_definition` and
+:class:`pydolphinscheduler.tasks.shell`.
+
+.. literalinclude:: ../../examples/tutorial.py
+   :start-after: [start package_import]
+   :end-before: [end package_import]
+
+If you want to use other task type you could click and
+:doc:`see all tasks we support <tasks/index>`
+
+Process Definition Declaration
+------------------------------
+
+We should instantiate object after we import them from `import necessary module`_.
+Here we declare basic arguments for process definition(aka, workflow). We define
+the name of process definition, using `Python context manager`_ and it
+**the only required argument** for object process definition. Beside that we also
+declare three arguments named `schedule`, `start_time` which setting workflow schedule
+interval and schedule start_time, and argument `tenant` which changing workflow's
+task running user in the worker, :ref:`section tenant <concept:tenant>` in *PyDolphinScheduler*
+:doc:`concept` page have more detail information.
+
+.. literalinclude:: ../../examples/tutorial.py
+   :start-after: [start workflow_declare]
+   :end-before: [end workflow_declare]
+
+We could find more detail about process definition in
+:ref:`concept about process definition <concept:process definition>` if you interested in it.
+For all arguments of object process definition, you could find in the
+:class:`pydolphinscheduler.core.process_definition` api documentation.
+
+Task Declaration
+----------------
+
+Here we declare four tasks, and bot of them are simple task of
+:class:`pydolphinscheduler.tasks.shell` which running `echo` command in terminal.
+Beside the argument `command`, we also need setting argument `name` for each task *(not
+only shell task, `name` is required for each type of task)*.
+
+.. literalinclude:: ../../examples/tutorial.py
+   :dedent: 0
+   :start-after: [start task_declare]
+   :end-before: [end task_declare]
+
+Beside shell task, *PyDolphinScheduler* support multiple tasks and you could
+find in :doc:`tasks/index`.
+
+Setting Task Dependence
+-----------------------
+
+After we declare both process definition and task, we have one workflow with
+four tasks, both all tasks is independent so that they would run in parallel.
+We should reorder the sort and the dependence of tasks. It useful when we need
+run prepare task before we run actual task or we need tasks running is specific
+rule. We both support attribute `set_downstream` and `set_upstream`, or bitwise
+operators `>>` and `<<`.
+
+In this example, we set task `task_parent` is the upstream task of task
+`task_child_one` and `task_child_two`, and task `task_union` is the downstream
+task of both these two task.
+
+.. literalinclude:: ../../examples/tutorial.py
+   :dedent: 0
+   :start-after: [start task_relation_declare]
+   :end-before: [end task_relation_declare]
+
+Please notice that we could grouping some tasks and set dependence if they have
+same downstream or upstream. We declare task `task_child_one` and `task_child_two`
+as a group here, named as `task_group` and set task `task_parent` as upstream of
+both of them. You could see more detail in :ref:`concept:Tasks Dependence` section in concept
+documentation.
+
+Submit Or Run Workflow
+----------------------
+
+Now we finish our workflow definition, with task and task dependence, but all
+these things are in local, we should let Apache DolphinScheduler daemon know what we
+define our workflow. So the last thing we have to do here is submit our workflow to
+Apache DolphinScheduler daemon.
+
+We here in the example using `ProcessDefinition` attribute `run` to submit workflow
+to the daemon, and set the schedule time we just declare in `process definition declaration`_.
+
+Now, we could run the Python code like other Python script, for the basic usage run
+:code:`python tutorial.py` to trigger and run it.
+
+.. literalinclude:: ../../examples/tutorial.py
+   :dedent: 0
+   :start-after: [start submit_or_run]
+   :end-before: [end submit_or_run]
+
+If you not start your Apache DolphinScheduler server, you could find the way in
+:ref:`start:start Python gateway server` and it would have more detail about related server
+start. Beside attribute `run`, we have attribute `submit` for object `ProcessDefinition`
+and it just submit workflow to the daemon but not setting the schedule information. For
+more detail you could see :ref:`concept:process definition`.
+
+DAG Graph After Tutorial Run
+----------------------------
+
+After we run the tutorial code, you could login Apache DolphinScheduler web UI,
+go and see the `DolphinScheduler project page`_. they is a new process definition be
+created and named "Tutorial". It create by *PyDolphinScheduler* and the DAG graph as below
+
+.. literalinclude:: ../../examples/tutorial.py
+   :language: text
+   :lines: 24-28
+
+.. _`DolphinScheduler project page`: https://dolphinscheduler.apache.org/en-us/docs/latest/user_doc/guide/project.html
+.. _`Python context manager`: https://docs.python.org/3/library/stdtypes.html#context-manager-types

dolphinscheduler-python/pydolphinscheduler/examples/task_condition_example.py

@@ -15,6 +15,7 @@
 # specific language governing permissions and limitations
 # under the License.
 
+# [start workflow_declare]
 r"""
 A example workflow for task condition.
 
@@ -31,10 +32,10 @@ pre_task_3 ->                     -> fail_branch
 """
 
 from pydolphinscheduler.core.process_definition import ProcessDefinition
-from pydolphinscheduler.tasks.condition import FAILURE, SUCCESS, And, Conditions
+from pydolphinscheduler.tasks.condition import FAILURE, SUCCESS, And, Condition
 from pydolphinscheduler.tasks.shell import Shell
 
-with ProcessDefinition(name="task_conditions_example", tenant="tenant_exists") as pd:
+with ProcessDefinition(name="task_condition_example", tenant="tenant_exists") as pd:
     pre_task_1 = Shell(name="pre_task_1", command="echo pre_task_1")
     pre_task_2 = Shell(name="pre_task_2", command="echo pre_task_2")
     pre_task_3 = Shell(name="pre_task_3", command="echo pre_task_3")
@@ -48,10 +49,11 @@ with ProcessDefinition(name="task_conditions_example", tenant="tenant_exists") a
     success_branch = Shell(name="success_branch", command="echo success_branch")
     fail_branch = Shell(name="fail_branch", command="echo fail_branch")
 
-    condition = Conditions(
+    condition = Condition(
-        name="conditions",
+        name="condition",
         condition=cond_operator,
         success_task=success_branch,
         failed_task=fail_branch,
     )
     pd.submit()
+# [end workflow_declare]

dolphinscheduler-python/pydolphinscheduler/examples/task_datax_example.py

@@ -15,6 +15,7 @@
 # specific language governing permissions and limitations
 # under the License.
 
+# [start workflow_declare]
 """
 A example workflow for task datax.
 
@@ -24,7 +25,6 @@ You can create data sources `first_mysql` and `first_mysql` through UI.
 It creates a task to synchronize datax from the source database to the target database.
 """
 
-
 from pydolphinscheduler.core.process_definition import ProcessDefinition
 from pydolphinscheduler.tasks.datax import CustomDataX, DataX
 
@@ -92,3 +92,4 @@ with ProcessDefinition(
     # datax job same as task1, transfer record from `first_mysql` to `second_mysql`
     task2 = CustomDataX(name="task_custom_datax", json=str(JSON_TEMPLATE))
     pd.run()
+# [end workflow_declare]

dolphinscheduler-python/pydolphinscheduler/examples/task_dependent_example.py

@@ -15,6 +15,7 @@
 # specific language governing permissions and limitations
 # under the License.
 
+# [start workflow_declare]
 r"""
 A example workflow for task dependent.
 
@@ -70,3 +71,4 @@ with ProcessDefinition(
         ),
     )
     pd.submit()
+# [end workflow_declare]

dolphinscheduler-python/pydolphinscheduler/examples/task_flink_example.py

@@ -15,6 +15,7 @@
 # specific language governing permissions and limitations
 # under the License.
 
+# [start workflow_declare]
 """A example workflow for task flink."""
 
 from pydolphinscheduler.core.process_definition import ProcessDefinition
@@ -29,3 +30,4 @@ with ProcessDefinition(name="task_flink_example", tenant="tenant_exists") as pd:
         deploy_mode=DeployMode.LOCAL,
     )
     pd.run()
+# [end workflow_declare]

dolphinscheduler-python/pydolphinscheduler/examples/task_map_reduce_example.py

@@ -15,6 +15,7 @@
 # specific language governing permissions and limitations
 # under the License.
 
+# [start workflow_declare]
 """A example workflow for task mr."""
 
 from pydolphinscheduler.core.engine import ProgramType
@@ -30,3 +31,4 @@ with ProcessDefinition(name="task_map_reduce_example", tenant="tenant_exists") a
         main_args="/dolphinscheduler/tenant_exists/resources/file.txt /output/ds",
     )
     pd.run()
+# [end workflow_declare]

dolphinscheduler-python/pydolphinscheduler/examples/task_spark_example.py

@@ -15,6 +15,7 @@
 # specific language governing permissions and limitations
 # under the License.
 
+# [start workflow_declare]
 """A example workflow for task spark."""
 
 from pydolphinscheduler.core.process_definition import ProcessDefinition
@@ -29,3 +30,4 @@ with ProcessDefinition(name="task_spark_example", tenant="tenant_exists") as pd:
         deploy_mode=DeployMode.LOCAL,
     )
     pd.run()
+# [end workflow_declare]

dolphinscheduler-python/pydolphinscheduler/examples/task_switch_example.py

@@ -15,6 +15,7 @@
 # specific language governing permissions and limitations
 # under the License.
 
+# [start workflow_declare]
 r"""
 A example workflow for task switch.
 
@@ -47,3 +48,4 @@ with ProcessDefinition(
     switch = Switch(name="switch", condition=switch_condition)
     parent >> switch
     pd.submit()
+# [end workflow_declare]

dolphinscheduler-python/pydolphinscheduler/examples/tutorial.py

@@ -30,23 +30,39 @@ task_parent -->                        -->  task_union
 it will instantiate and run all the task it have.
 """
 
+# [start tutorial]
+# [start package_import]
+# Import ProcessDefinition object to define your workflow attributes
 from pydolphinscheduler.core.process_definition import ProcessDefinition
+
+# Import task Shell object cause we would create some shell tasks later
 from pydolphinscheduler.tasks.shell import Shell
 
+# [end package_import]
+
+# [start workflow_declare]
 with ProcessDefinition(
     name="tutorial",
     schedule="0 0 0 * * ? *",
     start_time="2021-01-01",
     tenant="tenant_exists",
 ) as pd:
+    # [end workflow_declare]
+    # [start task_declare]
     task_parent = Shell(name="task_parent", command="echo hello pydolphinscheduler")
     task_child_one = Shell(name="task_child_one", command="echo 'child one'")
     task_child_two = Shell(name="task_child_two", command="echo 'child two'")
     task_union = Shell(name="task_union", command="echo union")
+    # [end task_declare]
 
+    # [start task_relation_declare]
     task_group = [task_child_one, task_child_two]
     task_parent.set_downstream(task_group)
 
     task_union << task_group
+    # [end task_relation_declare]
 
+    # [start submit_or_run]
     pd.run()
+    # [end submit_or_run]
+# [end tutorial]

dolphinscheduler-python/pydolphinscheduler/requirements_dev.txt

@@ -25,3 +25,6 @@ flake8
 flake8-docstrings
 flake8-black
 isort
+# Document
+sphinx
+sphinx_rtd_theme

dolphinscheduler-python/pydolphinscheduler/src/pydolphinscheduler/core/__init__.py

@@ -16,3 +16,13 @@
 # under the License.
 
 """Init pydolphinscheduler.core package."""
+
+from pydolphinscheduler.core.database import Database
+from pydolphinscheduler.core.process_definition import ProcessDefinition
+from pydolphinscheduler.core.task import Task
+
+__all__ = [
+    "ProcessDefinition",
+    "Task",
+    "Database",
+]

dolphinscheduler-python/pydolphinscheduler/src/pydolphinscheduler/side/__init__.py

@@ -18,5 +18,15 @@
 """Init Side package, Side package keep object related to DolphinScheduler but not in the Core part."""
 
 from pydolphinscheduler.side.project import Project
+from pydolphinscheduler.side.queue import Queue
 from pydolphinscheduler.side.tenant import Tenant
 from pydolphinscheduler.side.user import User
+from pydolphinscheduler.side.worker_group import WorkerGroup
+
+__all__ = [
+    "Project",
+    "Tenant",
+    "User",
+    "Queue",
+    "WorkerGroup",
+]

dolphinscheduler-python/pydolphinscheduler/src/pydolphinscheduler/tasks/__init__.py

@@ -16,3 +16,33 @@
 # under the License.
 
 """Init pydolphinscheduler.tasks package."""
+
+from pydolphinscheduler.tasks.condition import FAILURE, SUCCESS, And, Condition, Or
+from pydolphinscheduler.tasks.datax import CustomDataX, DataX
+from pydolphinscheduler.tasks.dependent import Dependent
+from pydolphinscheduler.tasks.flink import Flink
+from pydolphinscheduler.tasks.http import Http
+from pydolphinscheduler.tasks.map_reduce import MR
+from pydolphinscheduler.tasks.procedure import Procedure
+from pydolphinscheduler.tasks.python import Python
+from pydolphinscheduler.tasks.shell import Shell
+from pydolphinscheduler.tasks.spark import Spark
+from pydolphinscheduler.tasks.sql import Sql
+from pydolphinscheduler.tasks.sub_process import SubProcess
+from pydolphinscheduler.tasks.switch import Branch, Default, Switch, SwitchCondition
+
+__all__ = [
+    "Condition",
+    "DataX",
+    "Dependent",
+    "Flink",
+    "Http",
+    "MR",
+    "Procedure",
+    "Python",
+    "Shell",
+    "Spark",
+    "Sql",
+    "SubProcess",
+    "Switch",
+]

dolphinscheduler-python/pydolphinscheduler/src/pydolphinscheduler/tasks/condition.py

@@ -154,7 +154,7 @@ class Or(ConditionOperator):
         super().__init__(*args)
 
 
-class Conditions(Task):
+class Condition(Task):
     """Task condition object, declare behavior for condition task to dolphinscheduler."""
 
     def __init__(

dolphinscheduler-python/pydolphinscheduler/src/pydolphinscheduler/tasks/shell.py

@@ -24,11 +24,28 @@ from pydolphinscheduler.core.task import Task
 class Shell(Task):
     """Task shell object, declare behavior for shell task to dolphinscheduler.
 
-    TODO maybe we could use instance name to replace attribute `name`
+    :param name: A unique, meaningful string for the shell task.
-    which is simplify as `task_shell = Shell(command = "echo 1")` and
+    :param command: One or more command want to run in this task.
-    task.name assign to `task_shell`
+
+        It could be simply command::
+
+            Shell(name=..., command="echo task shell")
+
+        or maybe same commands trying to do complex task::
+
+            command = '''echo task shell step 1;
+            echo task shell step 2;
+            echo task shell step 3
+            '''
+
+            Shell(name=..., command=command)
+
     """
 
+    # TODO maybe we could use instance name to replace attribute `name`
+    #  which is simplify as `task_shell = Shell(command = "echo 1")` and
+    #  task.name assign to `task_shell`
+
     _task_custom_attr = {
         "raw_script",
     }

dolphinscheduler-python/pydolphinscheduler/tests/example/test_example.py

@@ -19,28 +19,17 @@
 
 import ast
 import importlib
-
-# import os
-# import os
-from pathlib import Path
 from unittest.mock import patch
 
 import pytest
 
+from tests.testing.constants import task_without_example
+from tests.testing.path import get_all_examples, get_tasks
 from tests.testing.task import Task
 
 process_definition_name = set()
 
 
-def get_all_example_define():
-    """Get all examples files in examples directory."""
-    return (
-        path
-        for path in Path(__file__).parent.parent.parent.joinpath("examples").iterdir()
-        if path.is_file()
-    )
-
-
 def import_module(script_name, script_path):
     """Import and run example module in examples directory."""
     spec = importlib.util.spec_from_file_location(script_name, script_path)
@@ -49,6 +38,27 @@ def import_module(script_name, script_path):
     return module
 
 
+def test_task_without_example():
+    """Test task which without example.
+
+    Avoiding add new type of tasks but without adding example describe how to use it.
+    """
+    # We use example/tutorial.py as shell task example
+    ignore_name = {"__init__.py", "shell.py"}
+    all_tasks = {task.stem for task in get_tasks(ignore_name=ignore_name)}
+
+    have_example_tasks = set()
+    start = "task_"
+    end = "_example"
+    for ex in get_all_examples():
+        stem = ex.stem
+        if stem.startswith(start) and stem.endswith(end):
+            task_name = stem.replace(start, "").replace(end, "")
+            have_example_tasks.add(task_name)
+
+    assert all_tasks.difference(have_example_tasks) == task_without_example
+
+
 @pytest.fixture
 def setup_and_teardown_for_stuff():
     """Fixture of py.test handle setup and teardown."""
@@ -80,7 +90,7 @@ def test_example_basic():
     * All example except `tutorial.py` is end with keyword "_example"
     * All example must have not empty `__doc__`.
     """
-    for ex in get_all_example_define():
+    for ex in get_all_examples():
         # All files in example is python script
         assert (
             ex.suffix == ".py"
@@ -121,7 +131,7 @@ def test_example_process_definition_without_same_name(
     Our process definition would compete with others if we have same process definition name. It will make
     different between actually workflow and our workflow-as-code file which make users feel strange.
     """
-    for ex in get_all_example_define():
+    for ex in get_all_examples():
         # We use side_effect `submit_check_without_same_name` overwrite :func:`submit`
         # and check whether it have duplicate name or not
         import_module(ex.name, str(ex))
@@ -148,7 +158,7 @@ def test_file_name_in_process_definition(mock_code_version, mock_submit, mock_st
     more than one process definition.
     """
     global process_definition_name
-    for ex in get_all_example_define():
+    for ex in get_all_examples():
         # Skip bulk_create_example check, cause it contain multiple workflow and
         # without one named bulk_create_example
         if ex.stem == "bulk_create_example":

dolphinscheduler-python/pydolphinscheduler/tests/tasks/test_condition.py

@@ -27,8 +27,8 @@ from pydolphinscheduler.tasks.condition import (
     FAILURE,
     SUCCESS,
     And,
+    Condition,
     ConditionOperator,
-    Conditions,
     Or,
     Status,
 )
@@ -321,7 +321,7 @@ def test_condition_operator_set_define_attr_mix_operator(
     return_value=(12345, 1),
 )
 @patch(
-    "pydolphinscheduler.tasks.condition.Conditions.gen_code_and_version",
+    "pydolphinscheduler.tasks.condition.Condition.gen_code_and_version",
     return_value=(123, 1),
 )
 def test_condition_get_define(mock_condition_code_version, mock_task_code_version):
@@ -388,7 +388,7 @@ def test_condition_get_define(mock_condition_code_version, mock_task_code_versio
         "timeout": 0,
     }
 
-    task = Conditions(
+    task = Condition(
         name, condition=cond_operator, success_task=common_task, failed_task=common_task
     )
     assert task.get_define() == expect
@@ -414,7 +414,7 @@ def test_condition_set_dep_workflow(mock_task_code_version):
         success_branch = Task(name="success_branch", task_type=TEST_TYPE)
         fail_branch = Task(name="fail_branch", task_type=TEST_TYPE)
 
-        condition = Conditions(
+        condition = Condition(
             name="conditions",
             condition=cond_operator,
             success_task=success_branch,

dolphinscheduler-python/pydolphinscheduler/tests/test_docs.py

@@ -0,0 +1,59 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file 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.
+
+"""Test pydolphinscheduler docs."""
+
+import re
+
+from tests.testing.constants import task_without_example
+from tests.testing.path import get_doc_tasks, get_tasks
+
+ignore_code_file = {"__init__.py"}
+ignore_doc_file = {"index.rst"}
+
+
+def test_without_missing_task_rst():
+    """Test without missing any task document by compare filename.
+
+    Avoiding add new type of tasks but without adding document about it.
+    """
+    code_files = {p.stem for p in get_tasks(ignore_name=ignore_code_file)}
+    doc_files = {p.stem for p in get_doc_tasks(ignore_name=ignore_doc_file)}
+    assert code_files == doc_files
+
+
+def test_task_without_example():
+    """Test task document which without example.
+
+    Avoiding add new type of tasks but without adding example content describe how to use it.
+    """
+    task_without_example_detected = set()
+    pattern = re.compile("Example\n-------")
+
+    for doc in get_doc_tasks(ignore_name=ignore_doc_file):
+        search_result = pattern.search(doc.read_text())
+        if not search_result:
+            task_without_example_detected.add(doc.stem)
+    assert task_without_example == task_without_example_detected
+
+
+def test_doc_automodule_directive_name():
+    """Test task document with correct name in directive automodule."""
+    pattern = re.compile(".. automodule:: (.*)")
+    for doc in get_doc_tasks(ignore_name=ignore_doc_file):
+        match_string = pattern.search(doc.read_text()).group(1)
+        assert f"pydolphinscheduler.tasks.{doc.stem}" == match_string

dolphinscheduler-python/pydolphinscheduler/tests/testing/constants.py

@@ -0,0 +1,28 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file 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.
+
+"""Constants variables for test module."""
+
+# Record some task without example in directory `example`. Some of them maybe can not write example,
+# but most of them just without adding by mistake, and we should add it later.
+task_without_example = {
+    "sql",
+    "http",
+    "sub_process",
+    "python",
+    "procedure",
+}

dolphinscheduler-python/pydolphinscheduler/tests/testing/path.py

@@ -0,0 +1,54 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file 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.
+
+"""Handle path related issue in test module."""
+
+from pathlib import Path
+from typing import Any, Generator
+
+path_code_tasks = Path(__file__).parent.parent.parent.joinpath(
+    "src", "pydolphinscheduler", "tasks"
+)
+path_example = Path(__file__).parent.parent.parent.joinpath("examples")
+path_doc_tasks = Path(__file__).parent.parent.parent.joinpath("docs", "source", "tasks")
+
+
+def get_all_examples() -> Generator[Path, Any, None]:
+    """Get all examples files path in examples directory."""
+    return (ex for ex in path_example.iterdir() if ex.is_file())
+
+
+def get_tasks(ignore_name: set = None) -> Generator[Path, Any, None]:
+    """Get all tasks files path in src/pydolphinscheduler/tasks directory."""
+    if not ignore_name:
+        ignore_name = set()
+    return (
+        ex
+        for ex in path_code_tasks.iterdir()
+        if ex.is_file() and ex.name not in ignore_name
+    )
+
+
+def get_doc_tasks(ignore_name: set = None) -> Generator[Path, Any, None]:
+    """Get all tasks document path in docs/source/tasks directory."""
+    if not ignore_name:
+        ignore_name = set()
+    return (
+        ex
+        for ex in path_doc_tasks.iterdir()
+        if ex.is_file() and ex.name not in ignore_name
+    )