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+            
+  <div class="section" id="module-aria.orchestrator.workflows.builtin">
+<span id="aria-orchestrator-workflows-builtin"></span><h1><a class="reference 
internal" href="#module-aria.orchestrator.workflows.builtin" 
title="aria.orchestrator.workflows.builtin"><code class="xref py py-mod 
docutils literal"><span 
class="pre">aria.orchestrator.workflows.builtin</span></code></a><a 
class="headerlink" href="#module-aria.orchestrator.workflows.builtin" 
title="Permalink to this headline">¶</a></h1>
+<p>Built-in workflows.</p>
+<dl class="function">
+<dt id="aria.orchestrator.workflows.builtin.install">
+<code class="descclassname">aria.orchestrator.workflows.builtin.</code><code 
class="descname">install</code><span class="sig-paren">(</span><em>ctx</em>, 
<em>**workflow_parameters</em><span class="sig-paren">)</span><a 
class="headerlink" href="#aria.orchestrator.workflows.builtin.install" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Built-in install workflow.</p>
+</dd></dl>
+
+<dl class="function">
+<dt id="aria.orchestrator.workflows.builtin.uninstall">
+<code class="descclassname">aria.orchestrator.workflows.builtin.</code><code 
class="descname">uninstall</code><span class="sig-paren">(</span><em>ctx</em>, 
<em>**workflow_parameters</em><span class="sig-paren">)</span><a 
class="headerlink" href="#aria.orchestrator.workflows.builtin.uninstall" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Built-in uninstall workflow.</p>
+</dd></dl>
+
+<dl class="function">
+<dt id="aria.orchestrator.workflows.builtin.start">
+<code class="descclassname">aria.orchestrator.workflows.builtin.</code><code 
class="descname">start</code><span class="sig-paren">(</span><em>ctx</em>, 
<em>**workflow_parameters</em><span class="sig-paren">)</span><a 
class="headerlink" href="#aria.orchestrator.workflows.builtin.start" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Built-in start workflow.</p>
+</dd></dl>
+
+<dl class="function">
+<dt id="aria.orchestrator.workflows.builtin.stop">
+<code class="descclassname">aria.orchestrator.workflows.builtin.</code><code 
class="descname">stop</code><span class="sig-paren">(</span><em>ctx</em>, 
<em>**workflow_parameters</em><span class="sig-paren">)</span><a 
class="headerlink" href="#aria.orchestrator.workflows.builtin.stop" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Built-in stop workflow.</p>
+</dd></dl>
+
+<div class="section" 
id="module-aria.orchestrator.workflows.builtin.execute_operation">
+<span id="aria-orchestrator-workflows-builtin-execute-operation"></span><h2><a 
class="reference internal" 
href="#module-aria.orchestrator.workflows.builtin.execute_operation" 
title="aria.orchestrator.workflows.builtin.execute_operation"><code class="xref 
py py-mod docutils literal"><span 
class="pre">aria.orchestrator.workflows.builtin.execute_operation</span></code></a><a
 class="headerlink" 
href="#module-aria.orchestrator.workflows.builtin.execute_operation" 
title="Permalink to this headline">¶</a></h2>
+<p>Built-in operation execution Workflow.</p>
+<dl class="function">
+<dt 
id="aria.orchestrator.workflows.builtin.execute_operation.execute_operation">
+<code 
class="descclassname">aria.orchestrator.workflows.builtin.execute_operation.</code><code
 class="descname">execute_operation</code><span 
class="sig-paren">(</span><em>ctx</em>, <em>**workflow_parameters</em><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.builtin.execute_operation.execute_operation" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Built-in operation execution Workflow.</p>
+<table class="docutils field-list" frame="void" rules="none">
+<col class="field-name" />
+<col class="field-body" />
+<tbody valign="top">
+<tr class="field-odd field"><th class="field-name">Parameters:</th><td 
class="field-body"><ul class="first simple">
+<li><strong>workflow_context</strong> – workflow context</li>
+<li><strong>graph</strong> – graph which will describe the workflow</li>
+<li><strong>operation</strong> – operation name to execute</li>
+<li><strong>operation_kwargs</strong> – </li>
+<li><strong>run_by_dependency_order</strong> – </li>
+<li><strong>type_names</strong> – </li>
+<li><strong>node_template_ids</strong> – </li>
+<li><strong>node_ids</strong> – </li>
+<li><strong>kwargs</strong> – </li>
+</ul>
+</td>
+</tr>
+<tr class="field-even field"><th class="field-name">Returns:</th><td 
class="field-body"><p class="first last"></p>
+</td>
+</tr>
+</tbody>
+</table>
+</dd></dl>
+
+</div>
+<div class="section" id="module-aria.orchestrator.workflows.builtin.heal">
+<span id="aria-orchestrator-workflows-builtin-heal"></span><h2><a 
class="reference internal" 
href="#module-aria.orchestrator.workflows.builtin.heal" 
title="aria.orchestrator.workflows.builtin.heal"><code class="xref py py-mod 
docutils literal"><span 
class="pre">aria.orchestrator.workflows.builtin.heal</span></code></a><a 
class="headerlink" href="#module-aria.orchestrator.workflows.builtin.heal" 
title="Permalink to this headline">¶</a></h2>
+<p>Built-in heal workflow.</p>
+<dl class="function">
+<dt id="aria.orchestrator.workflows.builtin.heal.heal">
+<code 
class="descclassname">aria.orchestrator.workflows.builtin.heal.</code><code 
class="descname">heal</code><span class="sig-paren">(</span><em>ctx</em>, 
<em>**workflow_parameters</em><span class="sig-paren">)</span><a 
class="headerlink" href="#aria.orchestrator.workflows.builtin.heal.heal" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Built-in heal workflow..</p>
+<table class="docutils field-list" frame="void" rules="none">
+<col class="field-name" />
+<col class="field-body" />
+<tbody valign="top">
+<tr class="field-odd field"><th class="field-name">Parameters:</th><td 
class="field-body"><ul class="first simple">
+<li><strong>ctx</strong> – workflow context</li>
+<li><strong>graph</strong> – graph which will describe the workflow.</li>
+<li><strong>node_id</strong> – ID of the node to heal</li>
+</ul>
+</td>
+</tr>
+<tr class="field-even field"><th class="field-name">Returns:</th><td 
class="field-body"><p class="first last"></p>
+</td>
+</tr>
+</tbody>
+</table>
+</dd></dl>
+
+<dl class="function">
+<dt id="aria.orchestrator.workflows.builtin.heal.heal_install">
+<code 
class="descclassname">aria.orchestrator.workflows.builtin.heal.</code><code 
class="descname">heal_install</code><span 
class="sig-paren">(</span><em>ctx</em>, <em>**workflow_parameters</em><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.builtin.heal.heal_install" title="Permalink 
to this definition">¶</a></dt>
+<dd><p>Install phase of the heal mechanism.</p>
+<table class="docutils field-list" frame="void" rules="none">
+<col class="field-name" />
+<col class="field-body" />
+<tbody valign="top">
+<tr class="field-odd field"><th class="field-name">Parameters:</th><td 
class="field-body"><ul class="first last simple">
+<li><strong>ctx</strong> – workflow context</li>
+<li><strong>graph</strong> – task graph to edit.</li>
+<li><strong>failing_nodes</strong> – failing nodes to heal</li>
+<li><strong>targeted_nodes</strong> – targets of the relationships where the 
failing node are</li>
+</ul>
+</td>
+</tr>
+</tbody>
+</table>
+</dd></dl>
+
+<dl class="function">
+<dt id="aria.orchestrator.workflows.builtin.heal.heal_uninstall">
+<code 
class="descclassname">aria.orchestrator.workflows.builtin.heal.</code><code 
class="descname">heal_uninstall</code><span 
class="sig-paren">(</span><em>ctx</em>, <em>**workflow_parameters</em><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.builtin.heal.heal_uninstall" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Uninstall phase of the heal mechanism.</p>
+<table class="docutils field-list" frame="void" rules="none">
+<col class="field-name" />
+<col class="field-body" />
+<tbody valign="top">
+<tr class="field-odd field"><th class="field-name">Parameters:</th><td 
class="field-body"><ul class="first last simple">
+<li><strong>ctx</strong> – workflow context</li>
+<li><strong>graph</strong> – task graph to edit</li>
+<li><strong>failing_nodes</strong> – failing nodes to heal</li>
+<li><strong>targeted_nodes</strong> – targets of the relationships where the 
failing node are</li>
+</ul>
+</td>
+</tr>
+</tbody>
+</table>
+</dd></dl>
+
+</div>
+<div class="section" id="aria-orchestrator-workflows-builtin-install">
+<h2><a class="reference internal" 
href="#module-aria.orchestrator.workflows.builtin.install" 
title="aria.orchestrator.workflows.builtin.install"><code class="xref py py-mod 
docutils literal"><span 
class="pre">aria.orchestrator.workflows.builtin.install</span></code></a><a 
class="headerlink" href="#aria-orchestrator-workflows-builtin-install" 
title="Permalink to this headline">¶</a></h2>
+<span class="target" 
id="module-aria.orchestrator.workflows.builtin.install"></span><p>Built-in 
install workflow.</p>
+<dl class="function">
+<dt id="aria.orchestrator.workflows.builtin.install.install">
+<code 
class="descclassname">aria.orchestrator.workflows.builtin.install.</code><code 
class="descname">install</code><span class="sig-paren">(</span><em>ctx</em>, 
<em>**workflow_parameters</em><span class="sig-paren">)</span><a 
class="headerlink" href="#aria.orchestrator.workflows.builtin.install.install" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Built-in install workflow.</p>
+</dd></dl>
+
+</div>
+<div class="section" id="aria-orchestrator-workflows-builtin-start">
+<h2><a class="reference internal" 
href="#module-aria.orchestrator.workflows.builtin.start" 
title="aria.orchestrator.workflows.builtin.start"><code class="xref py py-mod 
docutils literal"><span 
class="pre">aria.orchestrator.workflows.builtin.start</span></code></a><a 
class="headerlink" href="#aria-orchestrator-workflows-builtin-start" 
title="Permalink to this headline">¶</a></h2>
+<span class="target" 
id="module-aria.orchestrator.workflows.builtin.start"></span><p>Built-in start 
workflow.</p>
+<dl class="function">
+<dt id="aria.orchestrator.workflows.builtin.start.start">
+<code 
class="descclassname">aria.orchestrator.workflows.builtin.start.</code><code 
class="descname">start</code><span class="sig-paren">(</span><em>ctx</em>, 
<em>**workflow_parameters</em><span class="sig-paren">)</span><a 
class="headerlink" href="#aria.orchestrator.workflows.builtin.start.start" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Built-in start workflow.</p>
+</dd></dl>
+
+</div>
+<div class="section" id="aria-orchestrator-workflows-builtin-stop">
+<h2><a class="reference internal" 
href="#module-aria.orchestrator.workflows.builtin.stop" 
title="aria.orchestrator.workflows.builtin.stop"><code class="xref py py-mod 
docutils literal"><span 
class="pre">aria.orchestrator.workflows.builtin.stop</span></code></a><a 
class="headerlink" href="#aria-orchestrator-workflows-builtin-stop" 
title="Permalink to this headline">¶</a></h2>
+<span class="target" 
id="module-aria.orchestrator.workflows.builtin.stop"></span><p>Built-in stop 
workflow.</p>
+<dl class="function">
+<dt id="aria.orchestrator.workflows.builtin.stop.stop">
+<code 
class="descclassname">aria.orchestrator.workflows.builtin.stop.</code><code 
class="descname">stop</code><span class="sig-paren">(</span><em>ctx</em>, 
<em>**workflow_parameters</em><span class="sig-paren">)</span><a 
class="headerlink" href="#aria.orchestrator.workflows.builtin.stop.stop" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Built-in stop workflow.</p>
+</dd></dl>
+
+</div>
+<div class="section" id="aria-orchestrator-workflows-builtin-uninstall">
+<h2><a class="reference internal" 
href="#module-aria.orchestrator.workflows.builtin.uninstall" 
title="aria.orchestrator.workflows.builtin.uninstall"><code class="xref py 
py-mod docutils literal"><span 
class="pre">aria.orchestrator.workflows.builtin.uninstall</span></code></a><a 
class="headerlink" href="#aria-orchestrator-workflows-builtin-uninstall" 
title="Permalink to this headline">¶</a></h2>
+<span class="target" 
id="module-aria.orchestrator.workflows.builtin.uninstall"></span><p>Built-in 
uninstall workflow.</p>
+<dl class="function">
+<dt id="aria.orchestrator.workflows.builtin.uninstall.uninstall">
+<code 
class="descclassname">aria.orchestrator.workflows.builtin.uninstall.</code><code
 class="descname">uninstall</code><span class="sig-paren">(</span><em>ctx</em>, 
<em>**workflow_parameters</em><span class="sig-paren">)</span><a 
class="headerlink" 
href="#aria.orchestrator.workflows.builtin.uninstall.uninstall" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Built-in uninstall workflow.</p>
+</dd></dl>
+
+</div>
+<div class="section" id="module-aria.orchestrator.workflows.builtin.workflows">
+<span id="aria-orchestrator-workflows-builtin-workflows"></span><h2><a 
class="reference internal" 
href="#module-aria.orchestrator.workflows.builtin.workflows" 
title="aria.orchestrator.workflows.builtin.workflows"><code class="xref py 
py-mod docutils literal"><span 
class="pre">aria.orchestrator.workflows.builtin.workflows</span></code></a><a 
class="headerlink" href="#module-aria.orchestrator.workflows.builtin.workflows" 
title="Permalink to this headline">¶</a></h2>
+<p>TSOCA normative lifecycle workflows.</p>
+<dl class="function">
+<dt id="aria.orchestrator.workflows.builtin.workflows.install_node">
+<code 
class="descclassname">aria.orchestrator.workflows.builtin.workflows.</code><code
 class="descname">install_node</code><span 
class="sig-paren">(</span><em>ctx</em>, <em>**workflow_parameters</em><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.builtin.workflows.install_node" 
title="Permalink to this definition">¶</a></dt>
+<dd></dd></dl>
+
+<dl class="function">
+<dt id="aria.orchestrator.workflows.builtin.workflows.uninstall_node">
+<code 
class="descclassname">aria.orchestrator.workflows.builtin.workflows.</code><code
 class="descname">uninstall_node</code><span 
class="sig-paren">(</span><em>ctx</em>, <em>**workflow_parameters</em><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.builtin.workflows.uninstall_node" 
title="Permalink to this definition">¶</a></dt>
+<dd></dd></dl>
+
+<dl class="function">
+<dt id="aria.orchestrator.workflows.builtin.workflows.start_node">
+<code 
class="descclassname">aria.orchestrator.workflows.builtin.workflows.</code><code
 class="descname">start_node</code><span 
class="sig-paren">(</span><em>ctx</em>, <em>**workflow_parameters</em><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.builtin.workflows.start_node" 
title="Permalink to this definition">¶</a></dt>
+<dd></dd></dl>
+
+<dl class="function">
+<dt id="aria.orchestrator.workflows.builtin.workflows.stop_node">
+<code 
class="descclassname">aria.orchestrator.workflows.builtin.workflows.</code><code
 class="descname">stop_node</code><span class="sig-paren">(</span><em>ctx</em>, 
<em>**workflow_parameters</em><span class="sig-paren">)</span><a 
class="headerlink" 
href="#aria.orchestrator.workflows.builtin.workflows.stop_node" 
title="Permalink to this definition">¶</a></dt>
+<dd></dd></dl>
+
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http://git-wip-us.apache.org/repos/asf/incubator-ariatosca-website/blob/4c010d53/_site/docs/html/aria.orchestrator.workflows.executor.html
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diff --git a/_site/docs/html/aria.orchestrator.workflows.executor.html 
b/_site/docs/html/aria.orchestrator.workflows.executor.html
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class="pre">aria.orchestrator.workflows</span></code></a></li>
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class="pre">aria.orchestrator.workflows.api</span></code></a></li>
+<li class="toctree-l1"><a class="reference internal" 
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class="pre">aria.orchestrator.workflows.builtin</span></code></a></li>
+<li class="toctree-l1 current"><a class="current reference internal" 
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class="pre">aria.orchestrator.workflows.executor</span></code></a><ul>
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literal"><span 
class="pre">aria.orchestrator.workflows.executor.base</span></code></a></li>
+<li class="toctree-l2"><a class="reference internal" 
href="#module-aria.orchestrator.workflows.executor.celery"><code 
class="docutils literal"><span 
class="pre">aria.orchestrator.workflows.executor.celery</span></code></a></li>
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literal"><span 
class="pre">aria.orchestrator.workflows.executor.dry</span></code></a></li>
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href="#module-aria.orchestrator.workflows.executor.process"><code 
class="docutils literal"><span 
class="pre">aria.orchestrator.workflows.executor.process</span></code></a></li>
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href="#module-aria.orchestrator.workflows.executor.thread"><code 
class="docutils literal"><span 
class="pre">aria.orchestrator.workflows.executor.thread</span></code></a></li>
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class="pre">aria.parser</span></code></a></li>
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class="pre">aria.parser.consumption</span></code></a></li>
+<li class="toctree-l1"><a class="reference internal" 
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class="pre">aria.parser.loading</span></code></a></li>
+<li class="toctree-l1"><a class="reference internal" 
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class="pre">aria.parser.modeling</span></code></a></li>
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class="pre">aria.parser.presentation</span></code></a></li>
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class="pre">aria.parser.validation</span></code></a></li>
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class="pre">aria.storage</span></code></a></li>
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class="pre">aria.utils</span></code></a></li>
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+<ul>
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literal"><span 
class="pre">aria_extension_tosca.simple_v1_0</span></code></a></li>
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literal"><span 
class="pre">aria_extension_tosca.simple_v1_0.modeling</span></code></a></li>
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class="pre">aria_extension_tosca.simple_v1_0.presentation</span></code></a></li>
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literal"><span 
class="pre">aria_extension_tosca.simple_nfv_v1_0</span></code></a></li>
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itemtype="http://schema.org/Article";>
+           <div itemprop="articleBody">
+            
+  <div class="section" id="module-aria.orchestrator.workflows.executor">
+<span id="aria-orchestrator-workflows-executor"></span><h1><a class="reference 
internal" href="#module-aria.orchestrator.workflows.executor" 
title="aria.orchestrator.workflows.executor"><code class="xref py py-mod 
docutils literal"><span 
class="pre">aria.orchestrator.workflows.executor</span></code></a><a 
class="headerlink" href="#module-aria.orchestrator.workflows.executor" 
title="Permalink to this headline">¶</a></h1>
+<p>Task executors.</p>
+<div class="section" id="module-aria.orchestrator.workflows.executor.base">
+<span id="aria-orchestrator-workflows-executor-base"></span><h2><a 
class="reference internal" 
href="#module-aria.orchestrator.workflows.executor.base" 
title="aria.orchestrator.workflows.executor.base"><code class="xref py py-mod 
docutils literal"><span 
class="pre">aria.orchestrator.workflows.executor.base</span></code></a><a 
class="headerlink" href="#module-aria.orchestrator.workflows.executor.base" 
title="Permalink to this headline">¶</a></h2>
+<p>Base class for task executors.</p>
+<dl class="class">
+<dt id="aria.orchestrator.workflows.executor.base.BaseExecutor">
+<em class="property">class </em><code 
class="descclassname">aria.orchestrator.workflows.executor.base.</code><code 
class="descname">BaseExecutor</code><span 
class="sig-paren">(</span><em>*args</em>, <em>**kwargs</em><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.executor.base.BaseExecutor" title="Permalink 
to this definition">¶</a></dt>
+<dd><p>Bases: <a class="reference internal" 
href="aria.html#aria.logger.LoggerMixin" title="aria.logger.LoggerMixin"><code 
class="xref py py-class docutils literal"><span 
class="pre">aria.logger.LoggerMixin</span></code></a></p>
+<p>Base class for task executors.</p>
+<dl class="method">
+<dt id="aria.orchestrator.workflows.executor.base.BaseExecutor.close">
+<code class="descname">close</code><span class="sig-paren">(</span><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.executor.base.BaseExecutor.close" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Closes the executor.</p>
+</dd></dl>
+
+<dl class="method">
+<dt id="aria.orchestrator.workflows.executor.base.BaseExecutor.execute">
+<code class="descname">execute</code><span 
class="sig-paren">(</span><em>ctx</em><span class="sig-paren">)</span><a 
class="headerlink" 
href="#aria.orchestrator.workflows.executor.base.BaseExecutor.execute" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Executes a task.</p>
+<table class="docutils field-list" frame="void" rules="none">
+<col class="field-name" />
+<col class="field-body" />
+<tbody valign="top">
+<tr class="field-odd field"><th class="field-name">Parameters:</th><td 
class="field-body"><strong>task</strong> – task to execute</td>
+</tr>
+</tbody>
+</table>
+</dd></dl>
+
+<dl class="method">
+<dt id="aria.orchestrator.workflows.executor.base.BaseExecutor.terminate">
+<code class="descname">terminate</code><span 
class="sig-paren">(</span><em>ctx</em><span class="sig-paren">)</span><a 
class="headerlink" 
href="#aria.orchestrator.workflows.executor.base.BaseExecutor.terminate" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Terminate the executing task
+:return:</p>
+</dd></dl>
+
+</dd></dl>
+
+<dl class="class">
+<dt id="aria.orchestrator.workflows.executor.base.StubTaskExecutor">
+<em class="property">class </em><code 
class="descclassname">aria.orchestrator.workflows.executor.base.</code><code 
class="descname">StubTaskExecutor</code><span 
class="sig-paren">(</span><em>*args</em>, <em>**kwargs</em><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.executor.base.StubTaskExecutor" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Bases: <a class="reference internal" 
href="#aria.orchestrator.workflows.executor.base.BaseExecutor" 
title="aria.orchestrator.workflows.executor.base.BaseExecutor"><code 
class="xref py py-class docutils literal"><span 
class="pre">aria.orchestrator.workflows.executor.base.BaseExecutor</span></code></a></p>
+<dl class="method">
+<dt id="aria.orchestrator.workflows.executor.base.StubTaskExecutor.execute">
+<code class="descname">execute</code><span 
class="sig-paren">(</span><em>ctx</em>, <em>*args</em>, <em>**kwargs</em><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.executor.base.StubTaskExecutor.execute" 
title="Permalink to this definition">¶</a></dt>
+<dd></dd></dl>
+
+</dd></dl>
+
+</div>
+<div class="section" id="module-aria.orchestrator.workflows.executor.celery">
+<span id="aria-orchestrator-workflows-executor-celery"></span><h2><a 
class="reference internal" 
href="#module-aria.orchestrator.workflows.executor.celery" 
title="aria.orchestrator.workflows.executor.celery"><code class="xref py py-mod 
docutils literal"><span 
class="pre">aria.orchestrator.workflows.executor.celery</span></code></a><a 
class="headerlink" href="#module-aria.orchestrator.workflows.executor.celery" 
title="Permalink to this headline">¶</a></h2>
+<p>Celery task executor.</p>
+<dl class="class">
+<dt id="aria.orchestrator.workflows.executor.celery.CeleryExecutor">
+<em class="property">class </em><code 
class="descclassname">aria.orchestrator.workflows.executor.celery.</code><code 
class="descname">CeleryExecutor</code><span 
class="sig-paren">(</span><em>app</em>, <em>*args</em>, <em>**kwargs</em><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.executor.celery.CeleryExecutor" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Bases: <a class="reference internal" 
href="#aria.orchestrator.workflows.executor.base.BaseExecutor" 
title="aria.orchestrator.workflows.executor.base.BaseExecutor"><code 
class="xref py py-class docutils literal"><span 
class="pre">aria.orchestrator.workflows.executor.base.BaseExecutor</span></code></a></p>
+<p>Celery task executor.</p>
+<dl class="method">
+<dt id="aria.orchestrator.workflows.executor.celery.CeleryExecutor.close">
+<code class="descname">close</code><span class="sig-paren">(</span><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.executor.celery.CeleryExecutor.close" 
title="Permalink to this definition">¶</a></dt>
+<dd></dd></dl>
+
+</dd></dl>
+
+</div>
+<div class="section" id="module-aria.orchestrator.workflows.executor.dry">
+<span id="aria-orchestrator-workflows-executor-dry"></span><h2><a 
class="reference internal" 
href="#module-aria.orchestrator.workflows.executor.dry" 
title="aria.orchestrator.workflows.executor.dry"><code class="xref py py-mod 
docutils literal"><span 
class="pre">aria.orchestrator.workflows.executor.dry</span></code></a><a 
class="headerlink" href="#module-aria.orchestrator.workflows.executor.dry" 
title="Permalink to this headline">¶</a></h2>
+<p>Dry task executor.</p>
+<dl class="class">
+<dt id="aria.orchestrator.workflows.executor.dry.DryExecutor">
+<em class="property">class </em><code 
class="descclassname">aria.orchestrator.workflows.executor.dry.</code><code 
class="descname">DryExecutor</code><span 
class="sig-paren">(</span><em>*args</em>, <em>**kwargs</em><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.executor.dry.DryExecutor" title="Permalink 
to this definition">¶</a></dt>
+<dd><p>Bases: <a class="reference internal" 
href="#aria.orchestrator.workflows.executor.base.BaseExecutor" 
title="aria.orchestrator.workflows.executor.base.BaseExecutor"><code 
class="xref py py-class docutils literal"><span 
class="pre">aria.orchestrator.workflows.executor.base.BaseExecutor</span></code></a></p>
+<p>Dry task executor: prints task information without causing any side 
effects.</p>
+<dl class="method">
+<dt id="aria.orchestrator.workflows.executor.dry.DryExecutor.execute">
+<code class="descname">execute</code><span 
class="sig-paren">(</span><em>ctx</em><span class="sig-paren">)</span><a 
class="headerlink" 
href="#aria.orchestrator.workflows.executor.dry.DryExecutor.execute" 
title="Permalink to this definition">¶</a></dt>
+<dd></dd></dl>
+
+</dd></dl>
+
+</div>
+<div class="section" id="module-aria.orchestrator.workflows.executor.process">
+<span id="aria-orchestrator-workflows-executor-process"></span><h2><a 
class="reference internal" 
href="#module-aria.orchestrator.workflows.executor.process" 
title="aria.orchestrator.workflows.executor.process"><code class="xref py 
py-mod docutils literal"><span 
class="pre">aria.orchestrator.workflows.executor.process</span></code></a><a 
class="headerlink" href="#module-aria.orchestrator.workflows.executor.process" 
title="Permalink to this headline">¶</a></h2>
+<p>Sub-process task executor.</p>
+<dl class="class">
+<dt id="aria.orchestrator.workflows.executor.process.ProcessExecutor">
+<em class="property">class </em><code 
class="descclassname">aria.orchestrator.workflows.executor.process.</code><code 
class="descname">ProcessExecutor</code><span 
class="sig-paren">(</span><em>plugin_manager=None</em>, 
<em>python_path=None</em>, <em>*args</em>, <em>**kwargs</em><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.executor.process.ProcessExecutor" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Bases: <a class="reference internal" 
href="#aria.orchestrator.workflows.executor.base.BaseExecutor" 
title="aria.orchestrator.workflows.executor.base.BaseExecutor"><code 
class="xref py py-class docutils literal"><span 
class="pre">aria.orchestrator.workflows.executor.base.BaseExecutor</span></code></a></p>
+<p>Sub-process task executor.</p>
+<dl class="method">
+<dt id="aria.orchestrator.workflows.executor.process.ProcessExecutor.close">
+<code class="descname">close</code><span class="sig-paren">(</span><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.executor.process.ProcessExecutor.close" 
title="Permalink to this definition">¶</a></dt>
+<dd></dd></dl>
+
+<dl class="method">
+<dt 
id="aria.orchestrator.workflows.executor.process.ProcessExecutor.terminate">
+<code class="descname">terminate</code><span 
class="sig-paren">(</span><em>task_id</em><span class="sig-paren">)</span><a 
class="headerlink" 
href="#aria.orchestrator.workflows.executor.process.ProcessExecutor.terminate" 
title="Permalink to this definition">¶</a></dt>
+<dd></dd></dl>
+
+</dd></dl>
+
+</div>
+<div class="section" id="module-aria.orchestrator.workflows.executor.thread">
+<span id="aria-orchestrator-workflows-executor-thread"></span><h2><a 
class="reference internal" 
href="#module-aria.orchestrator.workflows.executor.thread" 
title="aria.orchestrator.workflows.executor.thread"><code class="xref py py-mod 
docutils literal"><span 
class="pre">aria.orchestrator.workflows.executor.thread</span></code></a><a 
class="headerlink" href="#module-aria.orchestrator.workflows.executor.thread" 
title="Permalink to this headline">¶</a></h2>
+<p>Thread task executor.</p>
+<dl class="class">
+<dt id="aria.orchestrator.workflows.executor.thread.ThreadExecutor">
+<em class="property">class </em><code 
class="descclassname">aria.orchestrator.workflows.executor.thread.</code><code 
class="descname">ThreadExecutor</code><span 
class="sig-paren">(</span><em>pool_size=1</em>, <em>*args</em>, 
<em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.executor.thread.ThreadExecutor" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Bases: <a class="reference internal" 
href="#aria.orchestrator.workflows.executor.base.BaseExecutor" 
title="aria.orchestrator.workflows.executor.base.BaseExecutor"><code 
class="xref py py-class docutils literal"><span 
class="pre">aria.orchestrator.workflows.executor.base.BaseExecutor</span></code></a></p>
+<p>Thread task executor.</p>
+<p>It’s easier writing tests using this executor rather than the full-blown 
sub-process executor.</p>
+<p>Note: This executor is incapable of running plugin operations.</p>
+<dl class="method">
+<dt id="aria.orchestrator.workflows.executor.thread.ThreadExecutor.close">
+<code class="descname">close</code><span class="sig-paren">(</span><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.executor.thread.ThreadExecutor.close" 
title="Permalink to this definition">¶</a></dt>
+<dd></dd></dl>
+
+</dd></dl>
+
+</div>
+</div>
+
+
+           </div>
+           <div class="articleComments">
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http://git-wip-us.apache.org/repos/asf/incubator-ariatosca-website/blob/4c010d53/_site/docs/html/aria.orchestrator.workflows.html
----------------------------------------------------------------------
diff --git a/_site/docs/html/aria.orchestrator.workflows.html 
b/_site/docs/html/aria.orchestrator.workflows.html
new file mode 100644
index 0000000..0e962ac
--- /dev/null
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+</ul>
+<ul class="current">
+<li class="toctree-l1"><a class="reference internal" href="aria.html"><code 
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+<li class="toctree-l1"><a class="reference internal" 
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class="pre">aria.cli</span></code></a></li>
+<li class="toctree-l1"><a class="reference internal" 
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class="pre">aria.modeling</span></code></a></li>
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class="pre">aria.orchestrator.context</span></code></a></li>
+<li class="toctree-l1"><a class="reference internal" 
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literal"><span 
class="pre">aria.orchestrator.execution_plugin</span></code></a></li>
+<li class="toctree-l1"><a class="reference internal" 
href="aria.orchestrator.execution_plugin.ctx_proxy.html"><code class="docutils 
literal"><span 
class="pre">aria.orchestrator.execution_plugin.ctx_proxy</span></code></a></li>
+<li class="toctree-l1"><a class="reference internal" 
href="aria.orchestrator.execution_plugin.ssh.html"><code class="docutils 
literal"><span 
class="pre">aria.orchestrator.execution_plugin.ssh</span></code></a></li>
+<li class="toctree-l1 current"><a class="current reference internal" 
href="#"><code class="docutils literal"><span 
class="pre">aria.orchestrator.workflows</span></code></a><ul>
+<li class="toctree-l2"><a class="reference internal" 
href="#module-aria.orchestrator.workflows.events_logging"><code class="docutils 
literal"><span 
class="pre">aria.orchestrator.workflows.events_logging</span></code></a></li>
+<li class="toctree-l2"><a class="reference internal" 
href="#module-aria.orchestrator.workflows.exceptions"><code class="docutils 
literal"><span 
class="pre">aria.orchestrator.workflows.exceptions</span></code></a></li>
+<li class="toctree-l2"><a class="reference internal" 
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literal"><span 
class="pre">aria.orchestrator.workflows.core</span></code></a></li>
+<li class="toctree-l2"><a class="reference internal" 
href="#module-aria.orchestrator.workflows.core.graph_compiler"><code 
class="docutils literal"><span 
class="pre">aria.orchestrator.workflows.core.graph_compiler</span></code></a></li>
+<li class="toctree-l2"><a class="reference internal" 
href="#module-aria.orchestrator.workflows.core.engine"><code class="docutils 
literal"><span 
class="pre">aria.orchestrator.workflows.core.engine</span></code></a></li>
+<li class="toctree-l2"><a class="reference internal" 
href="#module-aria.orchestrator.workflows.core.events_handler"><code 
class="docutils literal"><span 
class="pre">aria.orchestrator.workflows.core.events_handler</span></code></a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" 
href="aria.orchestrator.workflows.api.html"><code class="docutils 
literal"><span 
class="pre">aria.orchestrator.workflows.api</span></code></a></li>
+<li class="toctree-l1"><a class="reference internal" 
href="aria.orchestrator.workflows.builtin.html"><code class="docutils 
literal"><span 
class="pre">aria.orchestrator.workflows.builtin</span></code></a></li>
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href="aria.orchestrator.workflows.executor.html"><code class="docutils 
literal"><span 
class="pre">aria.orchestrator.workflows.executor</span></code></a></li>
+<li class="toctree-l1"><a class="reference internal" 
href="aria.parser.html"><code class="docutils literal"><span 
class="pre">aria.parser</span></code></a></li>
+<li class="toctree-l1"><a class="reference internal" 
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class="pre">aria.parser.consumption</span></code></a></li>
+<li class="toctree-l1"><a class="reference internal" 
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class="pre">aria.parser.loading</span></code></a></li>
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class="pre">aria.parser.modeling</span></code></a></li>
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class="pre">aria.parser.presentation</span></code></a></li>
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class="pre">aria.parser.reading</span></code></a></li>
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class="pre">aria.storage</span></code></a></li>
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href="aria.utils.html"><code class="docutils literal"><span 
class="pre">aria.utils</span></code></a></li>
+</ul>
+<ul>
+<li class="toctree-l1"><a class="reference internal" 
href="aria_extension_tosca.simple_v1_0.html"><code class="docutils 
literal"><span 
class="pre">aria_extension_tosca.simple_v1_0</span></code></a></li>
+<li class="toctree-l1"><a class="reference internal" 
href="aria_extension_tosca.simple_v1_0.modeling.html"><code class="docutils 
literal"><span 
class="pre">aria_extension_tosca.simple_v1_0.modeling</span></code></a></li>
+<li class="toctree-l1"><a class="reference internal" 
href="aria_extension_tosca.simple_v1_0.presentation.html"><code class="docutils 
literal"><span 
class="pre">aria_extension_tosca.simple_v1_0.presentation</span></code></a></li>
+<li class="toctree-l1"><a class="reference internal" 
href="aria_extension_tosca.simple_nfv_v1_0.html"><code class="docutils 
literal"><span 
class="pre">aria_extension_tosca.simple_nfv_v1_0</span></code></a></li>
+</ul>
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+          
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+            
+  <div class="section" id="module-aria.orchestrator.workflows">
+<span id="aria-orchestrator-workflows"></span><h1><a class="reference 
internal" href="#module-aria.orchestrator.workflows" 
title="aria.orchestrator.workflows"><code class="xref py py-mod docutils 
literal"><span class="pre">aria.orchestrator.workflows</span></code></a><a 
class="headerlink" href="#module-aria.orchestrator.workflows" title="Permalink 
to this headline">¶</a></h1>
+<p>Workflows package.</p>
+<div class="section" id="module-aria.orchestrator.workflows.events_logging">
+<span id="aria-orchestrator-workflows-events-logging"></span><h2><a 
class="reference internal" 
href="#module-aria.orchestrator.workflows.events_logging" 
title="aria.orchestrator.workflows.events_logging"><code class="xref py py-mod 
docutils literal"><span 
class="pre">aria.orchestrator.workflows.events_logging</span></code></a><a 
class="headerlink" href="#module-aria.orchestrator.workflows.events_logging" 
title="Permalink to this headline">¶</a></h2>
+<p>Workflow event logging.</p>
+</div>
+<div class="section" id="module-aria.orchestrator.workflows.exceptions">
+<span id="aria-orchestrator-workflows-exceptions"></span><h2><a 
class="reference internal" 
href="#module-aria.orchestrator.workflows.exceptions" 
title="aria.orchestrator.workflows.exceptions"><code class="xref py py-mod 
docutils literal"><span 
class="pre">aria.orchestrator.workflows.exceptions</span></code></a><a 
class="headerlink" href="#module-aria.orchestrator.workflows.exceptions" 
title="Permalink to this headline">¶</a></h2>
+<p>Workflow exceptions.</p>
+<dl class="exception">
+<dt id="aria.orchestrator.workflows.exceptions.AriaEngineError">
+<em class="property">exception </em><code 
class="descclassname">aria.orchestrator.workflows.exceptions.</code><code 
class="descname">AriaEngineError</code><a class="headerlink" 
href="#aria.orchestrator.workflows.exceptions.AriaEngineError" title="Permalink 
to this definition">¶</a></dt>
+<dd><p>Bases: <a class="reference internal" 
href="aria.html#aria.exceptions.AriaError" 
title="aria.exceptions.AriaError"><code class="xref py py-class docutils 
literal"><span class="pre">aria.exceptions.AriaError</span></code></a></p>
+<p>Raised by the workflow engine.</p>
+</dd></dl>
+
+<dl class="exception">
+<dt id="aria.orchestrator.workflows.exceptions.ExecutorException">
+<em class="property">exception </em><code 
class="descclassname">aria.orchestrator.workflows.exceptions.</code><code 
class="descname">ExecutorException</code><a class="headerlink" 
href="#aria.orchestrator.workflows.exceptions.ExecutorException" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Bases: <a class="reference internal" 
href="aria.html#aria.exceptions.AriaError" 
title="aria.exceptions.AriaError"><code class="xref py py-class docutils 
literal"><span class="pre">aria.exceptions.AriaError</span></code></a></p>
+<p>General executor exception.</p>
+</dd></dl>
+
+<dl class="exception">
+<dt id="aria.orchestrator.workflows.exceptions.OperationNotFoundException">
+<em class="property">exception </em><code 
class="descclassname">aria.orchestrator.workflows.exceptions.</code><code 
class="descname">OperationNotFoundException</code><a class="headerlink" 
href="#aria.orchestrator.workflows.exceptions.OperationNotFoundException" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Bases: <a class="reference internal" 
href="#aria.orchestrator.workflows.exceptions.TaskCreationException" 
title="aria.orchestrator.workflows.exceptions.TaskCreationException"><code 
class="xref py py-class docutils literal"><span 
class="pre">aria.orchestrator.workflows.exceptions.TaskCreationException</span></code></a></p>
+<p>Could not find an operation on the node or relationship.</p>
+</dd></dl>
+
+<dl class="exception">
+<dt id="aria.orchestrator.workflows.exceptions.PluginNotFoundException">
+<em class="property">exception </em><code 
class="descclassname">aria.orchestrator.workflows.exceptions.</code><code 
class="descname">PluginNotFoundException</code><a class="headerlink" 
href="#aria.orchestrator.workflows.exceptions.PluginNotFoundException" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Bases: <a class="reference internal" 
href="#aria.orchestrator.workflows.exceptions.TaskCreationException" 
title="aria.orchestrator.workflows.exceptions.TaskCreationException"><code 
class="xref py py-class docutils literal"><span 
class="pre">aria.orchestrator.workflows.exceptions.TaskCreationException</span></code></a></p>
+<p>Could not find a plugin matching the plugin specification.</p>
+</dd></dl>
+
+<dl class="exception">
+<dt id="aria.orchestrator.workflows.exceptions.ProcessException">
+<em class="property">exception </em><code 
class="descclassname">aria.orchestrator.workflows.exceptions.</code><code 
class="descname">ProcessException</code><span 
class="sig-paren">(</span><em>command</em>, <em>stderr=None</em>, 
<em>stdout=None</em>, <em>return_code=None</em><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.exceptions.ProcessException" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Bases: <a class="reference internal" 
href="#aria.orchestrator.workflows.exceptions.ExecutorException" 
title="aria.orchestrator.workflows.exceptions.ExecutorException"><code 
class="xref py py-class docutils literal"><span 
class="pre">aria.orchestrator.workflows.exceptions.ExecutorException</span></code></a></p>
+<p>Raised when subprocess execution fails.</p>
+<p>Process class Exception
+:param list command: child process command
+:param str message: custom message
+:param str stderr: child process stderr
+:param str stdout: child process stdout
+:param int return_code: child process exit code</p>
+<dl class="attribute">
+<dt id="aria.orchestrator.workflows.exceptions.ProcessException.explanation">
+<code class="descname">explanation</code><a class="headerlink" 
href="#aria.orchestrator.workflows.exceptions.ProcessException.explanation" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Describes the error in detail</p>
+</dd></dl>
+
+</dd></dl>
+
+<dl class="exception">
+<dt id="aria.orchestrator.workflows.exceptions.TaskCreationException">
+<em class="property">exception </em><code 
class="descclassname">aria.orchestrator.workflows.exceptions.</code><code 
class="descname">TaskCreationException</code><a class="headerlink" 
href="#aria.orchestrator.workflows.exceptions.TaskCreationException" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Bases: <a class="reference internal" 
href="#aria.orchestrator.workflows.exceptions.TaskException" 
title="aria.orchestrator.workflows.exceptions.TaskException"><code class="xref 
py py-class docutils literal"><span 
class="pre">aria.orchestrator.workflows.exceptions.TaskException</span></code></a></p>
+<p>Could not create the task.</p>
+</dd></dl>
+
+<dl class="exception">
+<dt id="aria.orchestrator.workflows.exceptions.TaskException">
+<em class="property">exception </em><code 
class="descclassname">aria.orchestrator.workflows.exceptions.</code><code 
class="descname">TaskException</code><a class="headerlink" 
href="#aria.orchestrator.workflows.exceptions.TaskException" title="Permalink 
to this definition">¶</a></dt>
+<dd><p>Bases: <a class="reference internal" 
href="aria.html#aria.exceptions.AriaError" 
title="aria.exceptions.AriaError"><code class="xref py py-class docutils 
literal"><span class="pre">aria.exceptions.AriaError</span></code></a></p>
+<p>Raised by the task.</p>
+</dd></dl>
+
+</div>
+<div class="section" id="module-aria.orchestrator.workflows.core">
+<span id="aria-orchestrator-workflows-core"></span><h2><a class="reference 
internal" href="#module-aria.orchestrator.workflows.core" 
title="aria.orchestrator.workflows.core"><code class="xref py py-mod docutils 
literal"><span class="pre">aria.orchestrator.workflows.core</span></code></a><a 
class="headerlink" href="#module-aria.orchestrator.workflows.core" 
title="Permalink to this headline">¶</a></h2>
+<p>Workflow core.</p>
+</div>
+<div class="section" 
id="module-aria.orchestrator.workflows.core.graph_compiler">
+<span id="aria-orchestrator-workflows-core-graph-compiler"></span><h2><a 
class="reference internal" 
href="#module-aria.orchestrator.workflows.core.graph_compiler" 
title="aria.orchestrator.workflows.core.graph_compiler"><code class="xref py 
py-mod docutils literal"><span 
class="pre">aria.orchestrator.workflows.core.graph_compiler</span></code></a><a 
class="headerlink" 
href="#module-aria.orchestrator.workflows.core.graph_compiler" title="Permalink 
to this headline">¶</a></h2>
+<dl class="class">
+<dt id="aria.orchestrator.workflows.core.graph_compiler.GraphCompiler">
+<em class="property">class </em><code 
class="descclassname">aria.orchestrator.workflows.core.graph_compiler.</code><code
 class="descname">GraphCompiler</code><span 
class="sig-paren">(</span><em>ctx</em>, <em>default_executor</em><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.core.graph_compiler.GraphCompiler" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Bases: <a class="reference external" 
href="https://docs.python.org/2.7/library/functions.html#object"; title="(in 
Python v2.7)"><code class="xref py py-class docutils literal"><span 
class="pre">object</span></code></a></p>
+<dl class="method">
+<dt id="aria.orchestrator.workflows.core.graph_compiler.GraphCompiler.compile">
+<code class="descname">compile</code><span 
class="sig-paren">(</span><em>task_graph</em>, 
<em>start_stub_type='start_workflow'</em>, 
<em>end_stub_type='end_workflow'</em>, <em>depends_on=()</em><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.core.graph_compiler.GraphCompiler.compile" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Translates the user graph to the execution graph
+:param task_graph: The user’s graph
+:param start_stub_type: internal use
+:param end_stub_type: internal use
+:param depends_on: internal use</p>
+</dd></dl>
+
+</dd></dl>
+
+</div>
+<div class="section" id="module-aria.orchestrator.workflows.core.engine">
+<span id="aria-orchestrator-workflows-core-engine"></span><h2><a 
class="reference internal" 
href="#module-aria.orchestrator.workflows.core.engine" 
title="aria.orchestrator.workflows.core.engine"><code class="xref py py-mod 
docutils literal"><span 
class="pre">aria.orchestrator.workflows.core.engine</span></code></a><a 
class="headerlink" href="#module-aria.orchestrator.workflows.core.engine" 
title="Permalink to this headline">¶</a></h2>
+<p>Workflow execution.</p>
+<dl class="class">
+<dt id="aria.orchestrator.workflows.core.engine.Engine">
+<em class="property">class </em><code 
class="descclassname">aria.orchestrator.workflows.core.engine.</code><code 
class="descname">Engine</code><span 
class="sig-paren">(</span><em>executors</em>, <em>**kwargs</em><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.core.engine.Engine" title="Permalink to this 
definition">¶</a></dt>
+<dd><p>Bases: <a class="reference internal" 
href="aria.html#aria.logger.LoggerMixin" title="aria.logger.LoggerMixin"><code 
class="xref py py-class docutils literal"><span 
class="pre">aria.logger.LoggerMixin</span></code></a></p>
+<p>Executes workflows.</p>
+<dl class="staticmethod">
+<dt id="aria.orchestrator.workflows.core.engine.Engine.cancel_execution">
+<em class="property">static </em><code 
class="descname">cancel_execution</code><span 
class="sig-paren">(</span><em>ctx</em><span class="sig-paren">)</span><a 
class="headerlink" 
href="#aria.orchestrator.workflows.core.engine.Engine.cancel_execution" 
title="Permalink to this definition">¶</a></dt>
+<dd><p>Send a cancel request to the engine. If execution already started, 
execution status
+will be modified to <code class="docutils literal"><span 
class="pre">cancelling</span></code> status. If execution is in pending mode, 
execution status
+will be modified to <code class="docutils literal"><span 
class="pre">cancelled</span></code> directly.</p>
+</dd></dl>
+
+<dl class="method">
+<dt id="aria.orchestrator.workflows.core.engine.Engine.execute">
+<code class="descname">execute</code><span 
class="sig-paren">(</span><em>ctx</em>, <em>resuming=False</em><span 
class="sig-paren">)</span><a class="headerlink" 
href="#aria.orchestrator.workflows.core.engine.Engine.execute" title="Permalink 
to this definition">¶</a></dt>
+<dd><p>Executes the workflow.</p>
+</dd></dl>
+
+</dd></dl>
+
+</div>
+<div class="section" 
id="module-aria.orchestrator.workflows.core.events_handler">
+<span id="aria-orchestrator-workflows-core-events-handler"></span><h2><a 
class="reference internal" 
href="#module-aria.orchestrator.workflows.core.events_handler" 
title="aria.orchestrator.workflows.core.events_handler"><code class="xref py 
py-mod docutils literal"><span 
class="pre">aria.orchestrator.workflows.core.events_handler</span></code></a><a 
class="headerlink" 
href="#module-aria.orchestrator.workflows.core.events_handler" title="Permalink 
to this headline">¶</a></h2>
+<p>Workflow event handling.</p>
+</div>
+</div>
+
+
+           </div>
+           <div class="articleComments">
+            
+           </div>
+          </div>
+          <footer>
+  
+    <div class="rst-footer-buttons" role="navigation" aria-label="footer 
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