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| <h1>Source code for airflow.models.variable</h1><div class="highlight"><pre> |
| <span></span><span class="c1"># -*- coding: utf-8 -*-</span> |
| <span class="c1">#</span> |
| <span class="c1"># Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="c1"># or more contributor license agreements. See the NOTICE file</span> |
| <span class="c1"># distributed with this work for additional information</span> |
| <span class="c1"># regarding copyright ownership. The ASF licenses this file</span> |
| <span class="c1"># to you under the Apache License, Version 2.0 (the</span> |
| <span class="c1"># "License"); you may not use this file except in compliance</span> |
| <span class="c1"># with the License. You may obtain a copy of the License at</span> |
| <span class="c1">#</span> |
| <span class="c1"># http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="c1">#</span> |
| <span class="c1"># Unless required by applicable law or agreed to in writing,</span> |
| <span class="c1"># software distributed under the License is distributed on an</span> |
| <span class="c1"># "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span> |
| <span class="c1"># KIND, either express or implied. See the License for the</span> |
| <span class="c1"># specific language governing permissions and limitations</span> |
| <span class="c1"># under the License.</span> |
| |
| <span class="kn">import</span> <span class="nn">json</span> |
| <span class="kn">from</span> <span class="nn">builtins</span> <span class="kn">import</span> <span class="nb">bytes</span> |
| <span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">Any</span> |
| |
| <span class="kn">from</span> <span class="nn">sqlalchemy</span> <span class="kn">import</span> <span class="n">Column</span><span class="p">,</span> <span class="n">Integer</span><span class="p">,</span> <span class="n">String</span><span class="p">,</span> <span class="n">Text</span><span class="p">,</span> <span class="n">Boolean</span> |
| <span class="kn">from</span> <span class="nn">sqlalchemy.ext.declarative</span> <span class="kn">import</span> <span class="n">declared_attr</span> |
| <span class="kn">from</span> <span class="nn">sqlalchemy.orm</span> <span class="kn">import</span> <span class="n">synonym</span> |
| |
| <span class="kn">from</span> <span class="nn">airflow.models.base</span> <span class="kn">import</span> <span class="n">Base</span><span class="p">,</span> <span class="n">ID_LEN</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.crypto</span> <span class="kn">import</span> <span class="n">get_fernet</span><span class="p">,</span> <span class="n">InvalidFernetToken</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.db</span> <span class="kn">import</span> <span class="n">provide_session</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.log.logging_mixin</span> <span class="kn">import</span> <span class="n">LoggingMixin</span> |
| |
| |
| <div class="viewcode-block" id="Variable"><a class="viewcode-back" href="../../../_api/airflow/models/variable/index.html#airflow.models.Variable">[docs]</a><span class="k">class</span> <span class="nc">Variable</span><span class="p">(</span><span class="n">Base</span><span class="p">,</span> <span class="n">LoggingMixin</span><span class="p">):</span> |
| <div class="viewcode-block" id="Variable.__tablename__"><a class="viewcode-back" href="../../../_api/airflow/models/variable/index.html#airflow.models.Variable.__tablename__">[docs]</a> <span class="n">__tablename__</span> <span class="o">=</span> <span class="s2">"variable"</span></div> |
| <div class="viewcode-block" id="Variable.__NO_DEFAULT_SENTINEL"><a class="viewcode-back" href="../../../_api/airflow/models/variable/index.html#airflow.models.Variable.__NO_DEFAULT_SENTINEL">[docs]</a> <span class="n">__NO_DEFAULT_SENTINEL</span> <span class="o">=</span> <span class="nb">object</span><span class="p">()</span></div> |
| |
| <div class="viewcode-block" id="Variable.id"><a class="viewcode-back" href="../../../_api/airflow/models/variable/index.html#airflow.models.Variable.id">[docs]</a> <span class="nb">id</span> <span class="o">=</span> <span class="n">Column</span><span class="p">(</span><span class="n">Integer</span><span class="p">,</span> <span class="n">primary_key</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span></div> |
| <div class="viewcode-block" id="Variable.key"><a class="viewcode-back" href="../../../_api/airflow/models/variable/index.html#airflow.models.Variable.key">[docs]</a> <span class="n">key</span> <span class="o">=</span> <span class="n">Column</span><span class="p">(</span><span class="n">String</span><span class="p">(</span><span class="n">ID_LEN</span><span class="p">),</span> <span class="n">unique</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span></div> |
| <div class="viewcode-block" id="Variable._val"><a class="viewcode-back" href="../../../_api/airflow/models/variable/index.html#airflow.models.Variable._val">[docs]</a> <span class="n">_val</span> <span class="o">=</span> <span class="n">Column</span><span class="p">(</span><span class="s1">'val'</span><span class="p">,</span> <span class="n">Text</span><span class="p">)</span></div> |
| <div class="viewcode-block" id="Variable.is_encrypted"><a class="viewcode-back" href="../../../_api/airflow/models/variable/index.html#airflow.models.Variable.is_encrypted">[docs]</a> <span class="n">is_encrypted</span> <span class="o">=</span> <span class="n">Column</span><span class="p">(</span><span class="n">Boolean</span><span class="p">,</span> <span class="n">unique</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="Variable.__repr__"><a class="viewcode-back" href="../../../_api/airflow/models/variable/index.html#airflow.models.Variable.__repr__">[docs]</a> <span class="k">def</span> <span class="fm">__repr__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="c1"># Hiding the value</span> |
| <span class="k">return</span> <span class="s1">'</span><span class="si">{}</span><span class="s1"> : </span><span class="si">{}</span><span class="s1">'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">key</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">_val</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="Variable.get_val"><a class="viewcode-back" href="../../../_api/airflow/models/variable/index.html#airflow.models.Variable.get_val">[docs]</a> <span class="k">def</span> <span class="nf">get_val</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="n">log</span> <span class="o">=</span> <span class="n">LoggingMixin</span><span class="p">()</span><span class="o">.</span><span class="n">log</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_val</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_encrypted</span><span class="p">:</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="n">fernet</span> <span class="o">=</span> <span class="n">get_fernet</span><span class="p">()</span> |
| <span class="k">return</span> <span class="n">fernet</span><span class="o">.</span><span class="n">decrypt</span><span class="p">(</span><span class="nb">bytes</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_val</span><span class="p">,</span> <span class="s1">'utf-8'</span><span class="p">))</span><span class="o">.</span><span class="n">decode</span><span class="p">()</span> |
| <span class="k">except</span> <span class="n">InvalidFernetToken</span><span class="p">:</span> |
| <span class="n">log</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s2">"Can't decrypt _val for key=</span><span class="si">{}</span><span class="s2">, invalid token "</span> |
| <span class="s2">"or value"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">key</span><span class="p">))</span> |
| <span class="k">return</span> <span class="kc">None</span> |
| <span class="k">except</span> <span class="ne">Exception</span><span class="p">:</span> |
| <span class="n">log</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s2">"Can't decrypt _val for key=</span><span class="si">{}</span><span class="s2">, FERNET_KEY "</span> |
| <span class="s2">"configuration missing"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">key</span><span class="p">))</span> |
| <span class="k">return</span> <span class="kc">None</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_val</span></div> |
| |
| <div class="viewcode-block" id="Variable.set_val"><a class="viewcode-back" href="../../../_api/airflow/models/variable/index.html#airflow.models.Variable.set_val">[docs]</a> <span class="k">def</span> <span class="nf">set_val</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span> |
| <span class="k">if</span> <span class="n">value</span><span class="p">:</span> |
| <span class="n">fernet</span> <span class="o">=</span> <span class="n">get_fernet</span><span class="p">()</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_val</span> <span class="o">=</span> <span class="n">fernet</span><span class="o">.</span><span class="n">encrypt</span><span class="p">(</span><span class="nb">bytes</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="s1">'utf-8'</span><span class="p">))</span><span class="o">.</span><span class="n">decode</span><span class="p">()</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">is_encrypted</span> <span class="o">=</span> <span class="n">fernet</span><span class="o">.</span><span class="n">is_encrypted</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_val</span> <span class="o">=</span> <span class="kc">None</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">is_encrypted</span> <span class="o">=</span> <span class="kc">False</span></div> |
| |
| <span class="nd">@declared_attr</span> |
| <div class="viewcode-block" id="Variable.val"><a class="viewcode-back" href="../../../_api/airflow/models/variable/index.html#airflow.models.Variable.val">[docs]</a> <span class="k">def</span> <span class="nf">val</span><span class="p">(</span><span class="bp">cls</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">synonym</span><span class="p">(</span><span class="s1">'_val'</span><span class="p">,</span> |
| <span class="n">descriptor</span><span class="o">=</span><span class="nb">property</span><span class="p">(</span><span class="bp">cls</span><span class="o">.</span><span class="n">get_val</span><span class="p">,</span> <span class="bp">cls</span><span class="o">.</span><span class="n">set_val</span><span class="p">))</span></div> |
| |
| <span class="nd">@classmethod</span> |
| <div class="viewcode-block" id="Variable.setdefault"><a class="viewcode-back" href="../../../_api/airflow/models/variable/index.html#airflow.models.Variable.setdefault">[docs]</a> <span class="k">def</span> <span class="nf">setdefault</span><span class="p">(</span><span class="bp">cls</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">default</span><span class="p">,</span> <span class="n">deserialize_json</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Like a Python builtin dict object, setdefault returns the current value</span> |
| <span class="sd"> for a key, and if it isn't there, stores the default value and returns it.</span> |
| |
| <span class="sd"> :param key: Dict key for this Variable</span> |
| <span class="sd"> :type key: str</span> |
| <span class="sd"> :param default: Default value to set and return if the variable</span> |
| <span class="sd"> isn't already in the DB</span> |
| <span class="sd"> :type default: Mixed</span> |
| <span class="sd"> :param deserialize_json: Store this as a JSON encoded value in the DB</span> |
| <span class="sd"> and un-encode it when retrieving a value</span> |
| <span class="sd"> :return: Mixed</span> |
| <span class="sd"> """</span> |
| <span class="n">obj</span> <span class="o">=</span> <span class="n">Variable</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">default_var</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">deserialize_json</span><span class="o">=</span><span class="n">deserialize_json</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">obj</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">if</span> <span class="n">default</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">Variable</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">default</span><span class="p">,</span> <span class="n">serialize_json</span><span class="o">=</span><span class="n">deserialize_json</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">default</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'Default Value must be set'</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">obj</span></div> |
| |
| <span class="nd">@classmethod</span> |
| <span class="nd">@provide_session</span> |
| <div class="viewcode-block" id="Variable.get"><a class="viewcode-back" href="../../../_api/airflow/models/variable/index.html#airflow.models.Variable.get">[docs]</a> <span class="k">def</span> <span class="nf">get</span><span class="p">(</span> |
| <span class="bp">cls</span><span class="p">,</span> |
| <span class="n">key</span><span class="p">,</span> <span class="c1"># type: str</span> |
| <span class="n">default_var</span><span class="o">=</span><span class="n">__NO_DEFAULT_SENTINEL</span><span class="p">,</span> <span class="c1"># type: Any</span> |
| <span class="n">deserialize_json</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="c1"># type: bool</span> |
| <span class="n">session</span><span class="o">=</span><span class="kc">None</span> |
| <span class="p">):</span> |
| <span class="n">obj</span> <span class="o">=</span> <span class="n">session</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="bp">cls</span><span class="p">)</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="bp">cls</span><span class="o">.</span><span class="n">key</span> <span class="o">==</span> <span class="n">key</span><span class="p">)</span><span class="o">.</span><span class="n">first</span><span class="p">()</span> |
| <span class="k">if</span> <span class="n">obj</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">if</span> <span class="n">default_var</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">cls</span><span class="o">.</span><span class="n">__NO_DEFAULT_SENTINEL</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">default_var</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">KeyError</span><span class="p">(</span><span class="s1">'Variable </span><span class="si">{}</span><span class="s1"> does not exist'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">key</span><span class="p">))</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">if</span> <span class="n">deserialize_json</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">json</span><span class="o">.</span><span class="n">loads</span><span class="p">(</span><span class="n">obj</span><span class="o">.</span><span class="n">val</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">obj</span><span class="o">.</span><span class="n">val</span></div> |
| |
| <span class="nd">@classmethod</span> |
| <span class="nd">@provide_session</span> |
| <div class="viewcode-block" id="Variable.set"><a class="viewcode-back" href="../../../_api/airflow/models/variable/index.html#airflow.models.Variable.set">[docs]</a> <span class="k">def</span> <span class="nf">set</span><span class="p">(</span> |
| <span class="bp">cls</span><span class="p">,</span> |
| <span class="n">key</span><span class="p">,</span> <span class="c1"># type: str</span> |
| <span class="n">value</span><span class="p">,</span> <span class="c1"># type: Any</span> |
| <span class="n">serialize_json</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="c1"># type: bool</span> |
| <span class="n">session</span><span class="o">=</span><span class="kc">None</span> |
| <span class="p">):</span> |
| |
| <span class="k">if</span> <span class="n">serialize_json</span><span class="p">:</span> |
| <span class="n">stored_value</span> <span class="o">=</span> <span class="n">json</span><span class="o">.</span><span class="n">dumps</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="n">indent</span><span class="o">=</span><span class="mi">2</span><span class="p">,</span> <span class="n">separators</span><span class="o">=</span><span class="p">(</span><span class="s1">','</span><span class="p">,</span> <span class="s1">': '</span><span class="p">))</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">stored_value</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="n">value</span><span class="p">)</span> |
| |
| <span class="n">Variable</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">session</span><span class="o">=</span><span class="n">session</span><span class="p">)</span> |
| <span class="n">session</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">Variable</span><span class="p">(</span><span class="n">key</span><span class="o">=</span><span class="n">key</span><span class="p">,</span> <span class="n">val</span><span class="o">=</span><span class="n">stored_value</span><span class="p">))</span> <span class="c1"># type: ignore</span> |
| <span class="n">session</span><span class="o">.</span><span class="n">flush</span><span class="p">()</span></div> |
| |
| <span class="nd">@classmethod</span> |
| <span class="nd">@provide_session</span> |
| <div class="viewcode-block" id="Variable.delete"><a class="viewcode-back" href="../../../_api/airflow/models/variable/index.html#airflow.models.Variable.delete">[docs]</a> <span class="k">def</span> <span class="nf">delete</span><span class="p">(</span><span class="bp">cls</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">session</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="n">session</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="bp">cls</span><span class="p">)</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="bp">cls</span><span class="o">.</span><span class="n">key</span> <span class="o">==</span> <span class="n">key</span><span class="p">)</span><span class="o">.</span><span class="n">delete</span><span class="p">()</span></div> |
| |
| <div class="viewcode-block" id="Variable.rotate_fernet_key"><a class="viewcode-back" href="../../../_api/airflow/models/variable/index.html#airflow.models.Variable.rotate_fernet_key">[docs]</a> <span class="k">def</span> <span class="nf">rotate_fernet_key</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="n">fernet</span> <span class="o">=</span> <span class="n">get_fernet</span><span class="p">()</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_val</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_encrypted</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_val</span> <span class="o">=</span> <span class="n">fernet</span><span class="o">.</span><span class="n">rotate</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_val</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s1">'utf-8'</span><span class="p">))</span><span class="o">.</span><span class="n">decode</span><span class="p">()</span></div></div> |
| </pre></div> |
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