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Apache Zeppelin 0.10.1 Documentation: Apache Groovy Interpreter for Apache Zeppelin
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Apache Zeppelin 0.10.1 Documentation: Apache Groovy Interpreter for Apache Zeppelin</title> <meta name="description" content="Apache Groovy is a powerful, optionally typed and dynamic language, with static-typing and static compilation capabilities, for the Java platform aimed at improving developer productivity thanks to a concise, familiar and easy to learn syntax."> <meta name="author" content="The Apache Software Foundation"> <!-- Enable responsive viewport --> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- Le HTML5 shim, for IE6-8 support of HTML elements --> <!--[if lt IE 9]> <script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script> <![endif]--> <link href="//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" rel="stylesheet"> <!-- Le styles --> <link href="/docs/0.10.1/assets/themes/zeppelin/bootstrap/css/bootstrap.css" rel="stylesheet"> <link 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</ul> </li> <li> <a href="#" data-toggle="dropdown" class="dropdown-toggle">More<b class="caret"></b></a> <ul class="dropdown-menu scrollable-menu" style="right: 0; left: auto;"> <li class="title"><span>Extending Zeppelin</span></li> <li><a href="/docs/0.10.1/development/writing_zeppelin_interpreter.html">Writing Zeppelin Interpreter</a></li> <li role="separator" class="divider"></li> <li class="title"><span>Helium (Experimental)</span></li> <li><a href="/docs/0.10.1/development/helium/overview.html">Overview</a></li> <li><a href="/docs/0.10.1/development/helium/writing_application.html">Writing Helium Application</a></li> <li><a href="/docs/0.10.1/development/helium/writing_spell.html">Writing Helium Spell</a></li> <li><a href="/docs/0.10.1/development/helium/writing_visualization_basic.html">Writing Helium Visualization: Basics</a></li> <li><a href="/docs/0.10.1/development/helium/writing_visualization_transformation.html">Writing Helium Visualization: Transformation</a></li> <li role="separator" class="divider"></li> <li class="title"><span>Contributing to Zeppelin</span></li> <li><a href="/docs/0.10.1/setup/basics/how_to_build.html">How to Build Zeppelin</a></li> <li><a href="/docs/0.10.1/development/contribution/useful_developer_tools.html">Useful Developer Tools</a></li> <li><a href="/docs/0.10.1/development/contribution/how_to_contribute_code.html">How to Contribute (code)</a></li> <li><a href="/docs/0.10.1/development/contribution/how_to_contribute_website.html">How to Contribute (website)</a></li> <li role="separator" class="divider"></li> <li class="title"><span>External Resources</span></li> <li><a target="_blank" rel="noopener noreferrer" href="https://zeppelin.apache.org/community.html">Mailing List</a></li> <li><a target="_blank" rel="noopener noreferrer" href="https://cwiki.apache.org/confluence/display/ZEPPELIN/Zeppelin+Home">Apache Zeppelin Wiki</a></li> <li><a target="_blank" rel="noopener noreferrer" href="http://stackoverflow.com/questions/tagged/apache-zeppelin">Stackoverflow Questions about Zeppelin</a></li> </ul> </li> <li> <a href="/docs/0.10.1/search.html" class="nav-search-link"> <span class="fa fa-search nav-search-icon"></span> </a> </li> </ul> </nav><!--/.navbar-collapse --> </div> </div> <div class="content"> <!--<div class="hero-unit Apache Groovy Interpreter for Apache Zeppelin"> <h1></h1> </div> --> <div class="row"> <div class="col-md-12"> <!-- Licensed 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. --> <h1>Groovy Interpreter for Apache Zeppelin</h1> <h3>Samples</h3> <div class="highlight"><pre><code class="groovy language-groovy" data-lang="groovy"><span class="o">%</span><span class="n">groovy</span> <span class="c1">//get a parameter defined as z.angularBind('ngSearchParam', value, 'paragraph_id')</span> <span class="c1">//g is a context object for groovy to avoid mix with z object</span> <span class="kt">def</span> <span class="n">param</span> <span class="o">=</span> <span class="n">g</span><span class="o">.</span><span class="na">angular</span><span class="o">(</span><span class="s1">'ngSearchParam'</span><span class="o">)</span> <span class="c1">//send request https://www.googleapis.com/customsearch/v1?q=ngSearchParam_value</span> <span class="kt">def</span> <span class="n">r</span> <span class="o">=</span> <span class="n">HTTP</span><span class="o">.</span><span class="na">get</span><span class="o">(</span> <span class="c1">//assume you defined the groovy interpreter property</span> <span class="c1">// `search_baseurl`='https://www.googleapis.com/customsearch/v1'</span> <span class="c1">//in groovy object o.getProperty('A') == o.'A' == o.A == o['A']</span> <span class="n">url</span> <span class="o">:</span> <span class="n">g</span><span class="o">.</span><span class="na">search_baseurl</span><span class="o">,</span> <span class="nl">query:</span> <span class="o">[</span> <span class="nl">q:</span> <span class="n">param</span> <span class="o">],</span> <span class="nl">headers:</span> <span class="o">[</span> <span class="s1">'Accept'</span><span class="o">:</span><span class="s1">'application/json'</span><span class="o">,</span> <span class="c1">//'Authorization:' : g.getProperty('search_auth'),</span> <span class="o">],</span> <span class="n">ssl</span> <span class="o">:</span> <span class="n">g</span><span class="o">.</span><span class="na">getProperty</span><span class="o">(</span><span class="s1">'search_ssl'</span><span class="o">)</span> <span class="c1">// assume groovy interpreter property search_ssl = HTTP.getNaiveSSLContext()</span> <span class="o">)</span> <span class="c1">//check response code</span> <span class="k">if</span><span class="o">(</span> <span class="n">r</span><span class="o">.</span><span class="na">response</span><span class="o">.</span><span class="na">code</span><span class="o">==</span><span class="mi">200</span> <span class="o">)</span> <span class="o">{</span> <span class="n">g</span><span class="o">.</span><span class="na">html</span><span class="o">().</span><span class="na">with</span><span class="o">{</span> <span class="c1">//g.html() renders %angular to output and returns groovy.xml.MarkupBuilder</span> <span class="n">h2</span><span class="o">(</span><span class="s2">"the response ${r.response.code}"</span><span class="o">)</span> <span class="n">span</span><span class="o">(</span> <span class="n">r</span><span class="o">.</span><span class="na">response</span><span class="o">.</span><span class="na">body</span> <span class="o">)</span> <span class="n">h2</span><span class="o">(</span><span class="s2">"headers"</span><span class="o">)</span> <span class="n">pre</span><span class="o">(</span> <span class="n">r</span><span class="o">.</span><span class="na">response</span><span class="o">.</span><span class="na">headers</span><span class="o">.</span><span class="na">join</span><span class="o">(</span><span class="s1">'\n'</span><span class="o">)</span> <span class="o">)</span> <span class="o">}</span> <span class="o">}</span> <span class="k">else</span> <span class="o">{</span> <span class="c1">//just to show that it's possible to use println with multiline groovy string to render output</span> <span class="n">println</span><span class="o">(</span><span class="s2">"""%angular</span> <span class="s2"> <script> alert ("</span><span class="n">code</span><span class="o">=</span><span class="n">$</span><span class="o">{</span><span class="n">r</span><span class="o">.</span><span class="na">response</span><span class="o">.</span><span class="na">code</span><span class="o">}</span> <span class="err">\</span><span class="n">n</span> <span class="n">msg</span><span class="o">=</span><span class="n">$</span><span class="o">{</span><span class="n">r</span><span class="o">.</span><span class="na">response</span><span class="o">.</span><span class="na">message</span><span class="o">}</span><span class="s2">") </script></span> <span class="s2"> """</span><span class="o">)</span> <span class="o">}</span> </code></pre></div><div class="highlight"><pre><code class="groovy language-groovy" data-lang="groovy"><span class="o">%</span><span class="n">groovy</span> <span class="c1">//renders a table with headers a, b, c and two rows</span> <span class="n">g</span><span class="o">.</span><span class="na">table</span><span class="o">(</span> <span class="o">[</span> <span class="o">[</span><span class="s1">'a'</span><span class="o">,</span><span class="s1">'b'</span><span class="o">,</span><span class="s1">'c'</span><span class="o">],</span> <span class="o">[</span><span class="s1">'a1'</span><span class="o">,</span><span class="s1">'b1'</span><span class="o">,</span><span class="s1">'c1'</span><span class="o">],</span> <span class="o">[</span><span class="s1">'a2'</span><span class="o">,</span><span class="s1">'b2'</span><span class="o">,</span><span class="s1">'c2'</span><span class="o">],</span> <span class="o">]</span> <span class="o">)</span> </code></pre></div> <h3>the <code>g</code> object</h3> <ul> <li><p><code>g.angular(String name)</code></p> <p>Returns angular object by name. Look up notebook scope first and then global scope.</p></li> <li><p><code>g.angularBind(String name, Object value)</code></p> <p>Assign a new <code>value</code> into angular object <code>name</code></p></li> <li><p><code>java.util.Properties g.getProperties()</code></p> <p>returns all properties defined for this interpreter</p></li> <li><p><code>String g.getProperty('PROPERTY_NAME')</code> </p> <div class="highlight"><pre><code class="groovy language-groovy" data-lang="groovy"><span class="n">g</span><span class="o">.</span><span class="na">PROPERTY_NAME</span> <span class="n">g</span><span class="o">.</span><span class="s1">'PROPERTY_NAME'</span> <span class="n">g</span><span class="o">[</span><span class="s1">'PROPERTY_NAME'</span><span class="o">]</span> <span class="n">g</span><span class="o">.</span><span class="na">getProperties</span><span class="o">().</span><span class="na">getProperty</span><span class="o">(</span><span class="s1">'PROPERTY_NAME'</span><span class="o">)</span> </code></pre></div> <p>All above the accessor to named property defined in groovy interpreter. In this case with name <code>PROPERTY_NAME</code></p></li> <li><p><code>groovy.xml.MarkupBuilder g.html()</code></p> <p>Starts or continues rendering of <code>%angular</code> to output and returns <a href="http://groovy-lang.org/processing-xml.html#_markupbuilder">groovy.xml.MarkupBuilder</a> MarkupBuilder is usefull to generate html (xml)</p></li> <li><p><code>void g.table(obj)</code></p> <p>starts or continues rendering table rows.</p> <p>obj: List(rows) of List(columns) where first line is a header </p></li> <li><p><code>g.input(name, value )</code></p> <p>Creates <code>text</code> input with value specified. The parameter <code>value</code> is optional.</p></li> <li><p><code>g.select(name, default, Map<Object, String> options)</code></p> <p>Creates <code>select</code> input with defined options. The parameter <code>default</code> is optional.</p> <p><code>g.select('sex', 'm', ['m':'man', 'w':'woman'])</code></p></li> <li><p><code>g.checkbox(name, Collection checked, Map<Object, String> options)</code></p> <p>Creates <code>checkbox</code> input.</p></li> <li><p><code>g.get(name, default)</code></p> <p>Returns interpreter-based variable. Visibility depends on interpreter scope. The parameter <code>default</code> is optional.</p></li> <li><p><code>g.put(name, value)</code></p> <p>Stores new value into interpreter-based variable. Visibility depends on interpreter scope.</p></li> </ul> </div> </div> <hr> <footer> <!-- <p>© 2022 The Apache Software Foundation</p>--> </footer> </div> <script type="text/javascript"> (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) })(window,document,'script','//www.google-analytics.com/analytics.js','ga'); ga('create', 'UA-45176241-5', 'zeppelin.apache.org'); ga('require', 'linkid', 'linkid.js'); ga('send', 'pageview'); </script> </body> </html>