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PivotalLabsAndSamples/student-lab-instructions/05-spring-boot-web.html

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  477. .CodeRay .type{font-weight:bold}

  478. .CodeRay .predefined-type{color:inherit}

  479. .CodeRay .reserved,.CodeRay .keyword {color:#000;font-weight:bold}

  480. .CodeRay .key{color:#808}

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  484. .CodeRay .regexp .delimiter{color:#808}

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  508. .CodeRay .change .change{color:#66f}

  509. .CodeRay .head .head{color:#f4f}

  510. </style>

  511. <link rel="stylesheet"

  512.     href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"

  513.     integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u"

  514.     crossorigin="anonymous">

  515. <link rel="stylesheet"

  516.     href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css"

  517.     integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp"

  518.     crossorigin="anonymous">

  519. 

  520. <style>

  521.     .c2cb{

  522.         position: absolute; left: 0; top: 0;

  523.         cursor: pointer

  524.     }

  525.     .c2cb:focus {

  526.         outline: none;

  527.     }

  528.     body {

  529.         font-size: 18px;

  530.     }

  531. 

  532.     p {

  533.         font-size: 18px;

  534.     }

  535. 

  536.     td.content {

  537.         font-size:2.0625rem;

  538.     }

  539. 

  540.     div.title {

  541.         font-size:2.0625rem;

  542.     }

  543. </style>

  544. 

  545. <script src="js/jquery-3.2.1.min.js"></script>

  546. <script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js"></script>

  547. <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

  548. <script>

  549. 

  550.     $(function() {

  551.         var button = $("<div style='padding: 10px;'><button data-toggle='tooltip' placement='right' data-trigger='click' title='Copied!'  class='c2cb glyphicon glyphicon-copy'></button></div>");

  552.         $(".listingblock > .content pre").prepend(button);

  553. 

  554.         $('[data-toggle="tooltip"]').tooltip();

  555. 

  556.         $('[data-toggle="tooltip"]').mouseout(function() {

  557.             $(this).tooltip('hide');

  558.             $(this).trigger('blur');

  559.         });

  560. 

  561.         var clipboard = new Clipboard('.c2cb', {

  562.             target: function(c2cb) {

  563.                         return $(c2cb).parent().siblings("code")[0];

  564.                     }

  565.                 });

  566.             clipboard.on('success', function(e) {

  567.                 e.clearSelection();

  568.             });

  569.     });

  570. 

  571. </script>

  572. </head>

  573. <body class="article toc2 toc-left">

  574. <div id="header">

  575. <h1><a id="spring-boot-web"></a>Spring Boot Web</h1>

  576. <div id="toc" class="toc2">

  577. <div id="toctitle">Labs</div>

  578. <ul class="sectlevel1">

  579. <li><a href="#_code_snippet_manager">Code Snippet Manager</a></li>

  580. <li><a href="#_challenges">Challenges</a>

  581. <ul class="sectlevel2">

  582. <li><a href="#_adding_a_ui_home_page">Adding a UI - Home Page</a></li>

  583. <li><a href="#_rest_api">REST API</a></li>

  584. </ul>

  585. </li>

  586. <li><a href="#__homework">[HOMEWORK]</a></li>

  587. </ul>

  588. </div>

  589. </div>

  590. <div id="content">

  591. <div id="preamble">

  592. <div class="sectionbody">

  593. <div class="paragraph">

  594. <p>Get familiar with the <strong>Spring MVC</strong> and the <strong>Spring Boot Web applications</strong>.</p>

  595. </div>

  596. <div class="paragraph">

  597. <p><strong>Time:</strong> 30 minutes.</p>

  598. </div>

  599. <!-- toc disabled -->

  600. </div>

  601. </div>

  602. <div class="sect1">

  603. <h2 id="_code_snippet_manager">Code Snippet Manager</h2>

  604. <div class="sectionbody">

  605. <div class="paragraph">

  606. <p>As developers normally we require to have some <strong><em>code snippets</em></strong> that help us to code fast and safe.</p>

  607. </div>

  608. <div class="paragraph">

  609. <p>The main idea of this application is to create a site that can manage our <strong>Code Snippets</strong>. We are going to create a <strong>RESTful API</strong> for any external client.</p>

  610. </div>

  611. <div class="olist arabic">

  612. <ol class="arabic">

  613. <li>

  614. <p>Open a browser and hit the url: <a href="http://start.spring.io" class="bare" target="_blank">http://start.spring.io</a></p>

  615. </li>

  616. <li>

  617. <p>Click the <strong><em>Switch to the full version</em></strong> link.</p>

  618. </li>

  619. <li>

  620. <p>Fill out the <strong>Code Snippet Manager</strong> Project metadata with (See Figure 1.0):</p>

  621. <table class="tableblock frame-all grid-all spread">

  622. <caption class="title">Table 1. Code Snippet Manager App - metadata</caption>

  623. <colgroup>

  624. <col style="width: 16.6666%;">

  625. <col style="width: 83.3334%;">

  626. </colgroup>

  627. <thead>

  628. <tr>

  629. <th class="tableblock halign-left valign-top">Property</th>

  630. <th class="tableblock halign-left valign-top">Value</th>

  631. </tr>

  632. </thead>

  633. <tbody>

  634. <tr>

  635. <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>Group</strong>:</p></td>

  636. <td class="tableblock halign-left valign-top"><p class="tableblock"><em>io.pivotal.workshop</em></p></td>

  637. </tr>

  638. <tr>

  639. <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>Artifact</strong>:</p></td>

  640. <td class="tableblock halign-left valign-top"><p class="tableblock"><em>code-snippet-manager</em></p></td>

  641. </tr>

  642. <tr>

  643. <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>Name</strong>:</p></td>

  644. <td class="tableblock halign-left valign-top"><p class="tableblock"><em>code-snippet-manager</em></p></td>

  645. </tr>

  646. <tr>

  647. <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>Package Name</strong>:</p></td>

  648. <td class="tableblock halign-left valign-top"><p class="tableblock"><em>io.pivotal.workshop.snippet</em></p></td>

  649. </tr>

  650. <tr>

  651. <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>Dependencies</strong>:</p></td>

  652. <td class="tableblock halign-left valign-top"><p class="tableblock"><em>Web, DevTools, Groovy Templates</em></p></td>

  653. </tr>

  654. <tr>

  655. <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>Spring Boot</strong>:</p></td>

  656. <td class="tableblock halign-left valign-top"><p class="tableblock"><em>2.0.0.M7</em></p></td>

  657. </tr>

  658. </tbody>

  659. </table>

  660. <div class="paragraph">

  661. <div class="title">Figure 1.0: Spring Initializr - <a href="http://start.spring.io/" class="bare" target="_blank">http://start.spring.io/</a></div>

  662. <p><span class="image"><img src="images/05-spring-boot-web-01.png" alt="SpringInitializr" title="Spring Initializr"></span></p>

  663. </div>

  664. <div class="admonitionblock tip">

  665. <table>

  666. <tr>

  667. <td class="icon">

  668. <div class="title">Tip</div>

  669. </td>

  670. <td class="content">

  671. You can choose either <strong>Maven</strong> or <strong>Gradle</strong> project types.

  672. </td>

  673. </tr>

  674. </table>

  675. </div>

  676. </li>

  677. <li>

  678. <p>Type <strong>Web</strong>, <strong>DevTools</strong>, <strong>Groovy Templates</strong>, in the <strong><em>Dependencies</em></strong> field and press Enter.</p>

  679. </li>

  680. <li>

  681. <p>Click the <strong><em>Generate Project</em></strong> button.</p>

  682. </li>

  683. <li>

  684. <p>Unzip the file in any directory you want.</p>

  685. </li>

  686. <li>

  687. <p>Import your project in any IDE you want.</p>

  688. </li>

  689. <li>

  690. <p>Let&#8217;s start by defining the domain models. Create the following classes:</p>

  691. <div class="listingblock">

  692. <div class="title">io.pivotal.workshop.snippet.domain.Language.java</div>

  693. <div class="content">

  694. <pre class="CodeRay highlight"><code data-lang="java"><span class="keyword">package</span> <span class="namespace">io.pivotal.workshop.snippet.domain</span>;

  695. 

  696. <span class="directive">public</span> <span class="type">class</span> <span class="class">Language</span> {

  697. 

  698.         <span class="directive">private</span> <span class="predefined-type">String</span> id;

  699.         <span class="directive">private</span> <span class="predefined-type">String</span> name;

  700.         <span class="directive">private</span> <span class="predefined-type">String</span> syntax = <span class="string"><span class="delimiter">&quot;</span><span class="content">text</span><span class="delimiter">&quot;</span></span>;

  701. 

  702.         <span class="directive">public</span> Language() {

  703.                 <span class="local-variable">this</span>.id = java.util.UUID.randomUUID().toString().replaceAll(<span class="string"><span class="delimiter">&quot;</span><span class="content">-</span><span class="delimiter">&quot;</span></span>, <span class="string"><span class="delimiter">&quot;</span><span class="delimiter">&quot;</span></span>);;

  704.         }

  705. 

  706.         <span class="directive">public</span> Language(<span class="predefined-type">String</span> name) {

  707.                 <span class="local-variable">this</span>();

  708.                 <span class="local-variable">this</span>.name = name;

  709.         }

  710. 

  711.         <span class="directive">public</span> Language(<span class="predefined-type">String</span> name, <span class="predefined-type">String</span> syntax) {

  712.                 <span class="local-variable">this</span>(name);

  713.                 <span class="local-variable">this</span>.syntax = syntax;

  714.         }

  715. 

  716.         <span class="directive">public</span> <span class="predefined-type">String</span> getId() {

  717.                 <span class="keyword">return</span> id;

  718.         }

  719. 

  720.         <span class="directive">public</span> <span class="type">void</span> setId(<span class="predefined-type">String</span> id) {

  721.                 <span class="local-variable">this</span>.id = id;

  722.         }

  723. 

  724.         <span class="directive">public</span> <span class="predefined-type">String</span> getName() {

  725.                 <span class="keyword">return</span> name;

  726.         }

  727. 

  728.         <span class="directive">public</span> <span class="type">void</span> setName(<span class="predefined-type">String</span> name) {

  729.                 <span class="local-variable">this</span>.name = name;

  730.         }

  731. 

  732.         <span class="directive">public</span> <span class="predefined-type">String</span> getSyntax() {

  733.                 <span class="keyword">return</span> syntax;

  734.         }

  735. 

  736.         <span class="directive">public</span> <span class="type">void</span> setSyntax(<span class="predefined-type">String</span> syntax) {

  737.                 <span class="local-variable">this</span>.syntax = syntax;

  738.         }

  739. }</code></pre>

  740. </div>

  741. </div>

  742. <div class="paragraph">

  743. <p>We can have multiple snippets in different programming languages, that&#8217;s why we have this class. Take a look that also there is a <strong>syntax</strong> field; this field will be use later on for <strong><em>syntax highlight</em></strong>.</p>

  744. </div>

  745. <div class="listingblock">

  746. <div class="title">io.pivotal.workshop.snippet.domain.Code.java</div>

  747. <div class="content">

  748. <pre class="CodeRay highlight"><code data-lang="java"><span class="keyword">package</span> <span class="namespace">io.pivotal.workshop.snippet.domain</span>;

  749. 

  750. <span class="directive">public</span> <span class="type">class</span> <span class="class">Code</span> {

  751.         <span class="directive">private</span> <span class="predefined-type">String</span> id;

  752.         <span class="directive">private</span> <span class="predefined-type">String</span> source;

  753. 

  754.         <span class="directive">public</span> Code() {

  755.                 <span class="local-variable">this</span>.id = java.util.UUID.randomUUID().toString().replaceAll(<span class="string"><span class="delimiter">&quot;</span><span class="content">-</span><span class="delimiter">&quot;</span></span>, <span class="string"><span class="delimiter">&quot;</span><span class="delimiter">&quot;</span></span>);;

  756.         }

  757. 

  758.         <span class="directive">public</span> Code(<span class="predefined-type">String</span> source) {

  759.                 <span class="local-variable">this</span>();

  760.                 <span class="local-variable">this</span>.source = source;

  761.         }

  762. 

  763.         <span class="directive">public</span> <span class="predefined-type">String</span> getId() {

  764.                 <span class="keyword">return</span> id;

  765.         }

  766. 

  767.         <span class="directive">public</span> <span class="type">void</span> setId(<span class="predefined-type">String</span> id) {

  768.                 <span class="local-variable">this</span>.id = id;

  769.         }

  770. 

  771.         <span class="directive">public</span> <span class="predefined-type">String</span> getSource() {

  772.                 <span class="keyword">return</span> source;

  773.         }

  774. 

  775.         <span class="directive">public</span> <span class="type">void</span> setSource(<span class="predefined-type">String</span> source) {

  776.                 <span class="local-variable">this</span>.source = source;

  777.         }

  778. 

  779. }</code></pre>

  780. </div>

  781. </div>

  782. <div class="paragraph">

  783. <p>This class will be use to hold the actual snippet code.</p>

  784. </div>

  785. <div class="listingblock">

  786. <div class="title">io.pivotal.workshop.snippet.domain.Snippet.java</div>

  787. <div class="content">

  788. <pre class="CodeRay highlight"><code data-lang="java"><span class="keyword">package</span> <span class="namespace">io.pivotal.workshop.snippet.domain</span>;

  789. 

  790. <span class="keyword">import</span> <span class="include">java.util.Date</span>;

  791. 

  792. <span class="directive">public</span> <span class="type">class</span> <span class="class">Snippet</span> {

  793. 

  794.         <span class="directive">private</span> <span class="predefined-type">String</span> id;

  795.         <span class="directive">private</span> <span class="predefined-type">String</span> title;

  796.         <span class="directive">private</span> <span class="predefined-type">String</span> keywords;

  797.         <span class="directive">private</span> <span class="predefined-type">String</span> description;

  798.         <span class="directive">private</span> Language lang;

  799.         <span class="directive">private</span> Code code;

  800.         <span class="directive">private</span> <span class="predefined-type">Date</span> created;

  801.         <span class="directive">private</span> <span class="predefined-type">Date</span> modified;

  802. 

  803.         <span class="directive">public</span> Snippet() {

  804.                 <span class="local-variable">this</span>.id = java.util.UUID.randomUUID().toString().replaceAll(<span class="string"><span class="delimiter">&quot;</span><span class="content">-</span><span class="delimiter">&quot;</span></span>, <span class="string"><span class="delimiter">&quot;</span><span class="delimiter">&quot;</span></span>);

  805.                 <span class="local-variable">this</span>.created = <span class="keyword">new</span> <span class="predefined-type">Date</span>();

  806.                 <span class="local-variable">this</span>.modified = <span class="keyword">new</span> <span class="predefined-type">Date</span>();

  807.         }

  808. 

  809.         <span class="directive">public</span> Snippet(<span class="predefined-type">String</span> title, <span class="predefined-type">String</span> keywords, <span class="predefined-type">String</span> description, Language lang, Code code) {

  810.                 <span class="local-variable">this</span>();

  811.                 <span class="local-variable">this</span>.title = title;

  812.                 <span class="local-variable">this</span>.keywords = keywords;

  813.                 <span class="local-variable">this</span>.description = description;

  814.                 <span class="local-variable">this</span>.lang = lang;

  815.                 <span class="local-variable">this</span>.code = code;

  816.         }

  817. 

  818.         <span class="directive">public</span> Snippet(<span class="predefined-type">String</span> title, Language lang, Code code) {

  819.                 <span class="local-variable">this</span>(title, <span class="string"><span class="delimiter">&quot;</span><span class="delimiter">&quot;</span></span>, <span class="string"><span class="delimiter">&quot;</span><span class="delimiter">&quot;</span></span>, lang, code);

  820.         }

  821. 

  822.         <span class="directive">public</span> <span class="predefined-type">String</span> getId() {

  823.                 <span class="keyword">return</span> id;

  824.         }

  825. 

  826.         <span class="directive">public</span> <span class="type">void</span> setId(<span class="predefined-type">String</span> id) {

  827.                 <span class="local-variable">this</span>.id = id;

  828.         }

  829. 

  830.         <span class="directive">public</span> <span class="predefined-type">String</span> getTitle() {

  831.                 <span class="keyword">return</span> title;

  832.         }

  833. 

  834.         <span class="directive">public</span> <span class="type">void</span> setTitle(<span class="predefined-type">String</span> title) {

  835.                 <span class="local-variable">this</span>.title = title;

  836.         }

  837. 

  838.         <span class="directive">public</span> Language getLang() {

  839.                 <span class="keyword">return</span> lang;

  840.         }

  841. 

  842.         <span class="directive">public</span> <span class="type">void</span> setLang(Language lang) {

  843.                 <span class="local-variable">this</span>.lang = lang;

  844.         }

  845. 

  846.         <span class="directive">public</span> <span class="predefined-type">String</span> getDescription() {

  847.                 <span class="keyword">return</span> description;

  848.         }

  849. 

  850.         <span class="directive">public</span> <span class="type">void</span> setDescription(<span class="predefined-type">String</span> description) {

  851.                 <span class="local-variable">this</span>.description = description;

  852.         }

  853. 

  854.         <span class="directive">public</span> <span class="predefined-type">String</span> getKeywords() {

  855.                 <span class="keyword">return</span> keywords;

  856.         }

  857. 

  858.         <span class="directive">public</span> <span class="type">void</span> setKeywords(<span class="predefined-type">String</span> keywords) {

  859.                 <span class="local-variable">this</span>.keywords = keywords;

  860.         }

  861. 

  862.         <span class="directive">public</span> Code getCode() {

  863.                 <span class="keyword">return</span> code;

  864.         }

  865. 

  866.         <span class="directive">public</span> <span class="type">void</span> setCode(Code code) {

  867.                 <span class="local-variable">this</span>.code = code;

  868.         }

  869. 

  870.         <span class="directive">public</span> <span class="predefined-type">Date</span> getCreated() {

  871.                 <span class="keyword">return</span> created;

  872.         }

  873. 

  874.         <span class="directive">public</span> <span class="type">void</span> setCreated(<span class="predefined-type">Date</span> created) {

  875.                 <span class="local-variable">this</span>.created = created;

  876.         }

  877. 

  878.         <span class="directive">public</span> <span class="predefined-type">Date</span> getModified() {

  879.                 <span class="keyword">return</span> modified;

  880.         }

  881. 

  882.         <span class="directive">public</span> <span class="type">void</span> setModified(<span class="predefined-type">Date</span> modified) {

  883.                 <span class="local-variable">this</span>.modified = modified;

  884.         }

  885. }</code></pre>

  886. </div>

  887. </div>

  888. <div class="paragraph">

  889. <p>The above class will be the main reponse.</p>

  890. </div>

  891. </li>

  892. <li>

  893. <p>Next let&#8217;s create a base interface that will be use as main <strong>repository</strong>. In this case we are going to hold all the data in <strong>Memory</strong> using <strong>collections</strong>:</p>

  894. <div class="listingblock">

  895. <div class="title">io.pivotal.workshop.snippet.repository.SimpleRepository.java</div>

  896. <div class="content">

  897. <pre class="CodeRay highlight"><code data-lang="java"><span class="keyword">package</span> <span class="namespace">io.pivotal.workshop.snippet.repository</span>;

  898. 

  899. <span class="keyword">import</span> <span class="include">java.util.Collection</span>;

  900. 

  901. <span class="directive">public</span> <span class="type">interface</span> <span class="class">SimpleRepository</span>&lt;T&gt; {

  902. 

  903.         <span class="predefined-type">Iterable</span>&lt;T&gt; findAll();

  904.         <span class="type">void</span> saveAll(<span class="predefined-type">Collection</span>&lt;T&gt; items);

  905.         T saveAll(T item);

  906.         T findById(<span class="predefined-type">String</span> id);

  907. }</code></pre>

  908. </div>

  909. </div>

  910. <div class="paragraph">

  911. <p>as you can see it has just the most common actions.</p>

  912. </div>

  913. </li>

  914. <li>

  915. <p>Let&#8217;s create now all the Repositories that will be implementing the <strong>SimpleRepository</strong> interface.</p>

  916. <div class="listingblock">

  917. <div class="title">io.pivotal.workshop.snippet.repository.LanguageRepository.java</div>

  918. <div class="content">

  919. <pre class="CodeRay highlight"><code data-lang="java"><span class="keyword">package</span> <span class="namespace">io.pivotal.workshop.snippet.repository</span>;

  920. 

  921. <span class="keyword">import</span> <span class="include">java.util.ArrayList</span>;

  922. <span class="keyword">import</span> <span class="include">java.util.Collection</span>;

  923. <span class="keyword">import</span> <span class="include">java.util.List</span>;

  924. <span class="keyword">import</span> <span class="include">java.util.Optional</span>;

  925. <span class="keyword">import</span> <span class="include">java.util.stream.StreamSupport</span>;

  926. 

  927. <span class="keyword">import</span> <span class="include">org.springframework.stereotype.Repository</span>;

  928. 

  929. <span class="keyword">import</span> <span class="include">io.pivotal.workshop.snippet.domain.Language</span>;

  930. 

  931. <span class="annotation">@Repository</span>

  932. <span class="directive">public</span> <span class="type">class</span> <span class="class">LanguageRepository</span> <span class="directive">implements</span> SimpleRepository&lt;Language&gt;{

  933. 

  934.     <span class="directive">private</span> <span class="predefined-type">List</span>&lt;Language&gt; languages = <span class="keyword">new</span> <span class="predefined-type">ArrayList</span>&lt;&gt;();

  935. 

  936.         <span class="directive">public</span> <span class="predefined-type">Iterable</span>&lt;Language&gt; findAll(){

  937.                 <span class="keyword">return</span> languages;

  938.         }

  939. 

  940.         <span class="directive">public</span> <span class="type">void</span> saveAll(<span class="predefined-type">Collection</span>&lt;Language&gt; languages){

  941.                 <span class="local-variable">this</span>.languages.addAll(languages);

  942.         }

  943. 

  944.         <span class="directive">public</span> Language findById(<span class="predefined-type">String</span> name) {

  945.                 Optional&lt;Language&gt; language = StreamSupport

  946.                         .stream(<span class="local-variable">this</span>.languages.spliterator(), <span class="predefined-constant">false</span>)

  947.                         .filter(lang -&gt; lang.getName().equals(name))

  948.                         .findFirst();

  949. 

  950.                 <span class="keyword">if</span> (language.isPresent()) <span class="keyword">return</span> language.get();

  951. 

  952.                 <span class="keyword">return</span> <span class="predefined-constant">null</span>;

  953.         }

  954. 

  955.         <span class="directive">public</span> Language saveAll(Language item) {

  956.                 <span class="keyword">assert</span> item.getName() != <span class="predefined-constant">null</span>;

  957. 

  958.                 Language language = <span class="local-variable">this</span>.findById(item.getName());

  959. 

  960.                 <span class="keyword">if</span>(language == <span class="predefined-constant">null</span>) {

  961.                         <span class="local-variable">this</span>.languages.add(item);

  962.                         <span class="keyword">return</span> item;

  963.                 }<span class="keyword">else</span> {

  964.                         language.setName(item.getName());

  965.                         language.setSyntax(item.getSyntax());

  966.                         <span class="keyword">return</span> language;

  967.                 }

  968.         }

  969. }</code></pre>

  970. </div>

  971. </div>

  972. <div class="listingblock">

  973. <div class="title">io.pivotal.workshop.snippet.repository.CodeRepository.java</div>

  974. <div class="content">

  975. <pre class="CodeRay highlight"><code data-lang="java"><span class="keyword">package</span> <span class="namespace">io.pivotal.workshop.snippet.repository</span>;

  976. 

  977. <span class="keyword">import</span> <span class="include">java.util.ArrayList</span>;

  978. <span class="keyword">import</span> <span class="include">java.util.Collection</span>;

  979. <span class="keyword">import</span> <span class="include">java.util.List</span>;

  980. <span class="keyword">import</span> <span class="include">java.util.Optional</span>;

  981. 

  982. <span class="keyword">import</span> <span class="include">org.springframework.stereotype.Repository</span>;

  983. 

  984. <span class="keyword">import</span> <span class="include">io.pivotal.workshop.snippet.domain.Code</span>;

  985. 

  986. <span class="annotation">@Repository</span>

  987. <span class="directive">public</span> <span class="type">class</span> <span class="class">CodeRepository</span> <span class="directive">implements</span> SimpleRepository&lt;Code&gt;{

  988. 

  989.         <span class="directive">private</span> <span class="predefined-type">List</span>&lt;Code&gt; codes = <span class="keyword">new</span> <span class="predefined-type">ArrayList</span>&lt;&gt;();

  990. 

  991.         <span class="directive">public</span> <span class="predefined-type">List</span>&lt;Code&gt; findAll() {

  992.                 <span class="keyword">return</span> codes;

  993.         }

  994. 

  995.         <span class="annotation">@Override</span>

  996.         <span class="directive">public</span> <span class="type">void</span> saveAll(<span class="predefined-type">Collection</span>&lt;Code&gt; items) {

  997.                 <span class="local-variable">this</span>.codes.addAll(items);

  998.         }

  999. 

  1000.         <span class="annotation">@Override</span>

  1001.         <span class="directive">public</span> Code saveAll(Code item) {

  1002.                 <span class="keyword">assert</span> item.getSource() != <span class="predefined-constant">null</span>;

  1003. 

  1004.                 Code code = findById(item.getId());

  1005. 

  1006.                 <span class="keyword">if</span>(code == <span class="predefined-constant">null</span>){

  1007.                         <span class="local-variable">this</span>.codes.add(item);

  1008.                         <span class="keyword">return</span> item;

  1009.                 }

  1010.                 <span class="keyword">else</span> {

  1011.                         code.setSource(item.getSource());

  1012.                         <span class="keyword">return</span> code;

  1013.                 }

  1014.         }

  1015. 

  1016.         <span class="annotation">@Override</span>

  1017.         <span class="directive">public</span> Code findById(<span class="predefined-type">String</span> id) {

  1018.                 Optional&lt;Code&gt; code = codes

  1019.                                 .stream()

  1020.                                 .filter(c -&gt; c.getId().equals(id))

  1021.                                 .findFirst();

  1022.                 <span class="keyword">if</span> (code.isPresent()) <span class="keyword">return</span> code.get();

  1023. 

  1024.                 <span class="keyword">return</span> <span class="predefined-constant">null</span>;

  1025.         }

  1026. 

  1027. 

  1028. }</code></pre>

  1029. </div>

  1030. </div>

  1031. <div class="listingblock">

  1032. <div class="title">io.pivotal.workshop.snippet.repository.SnippetRepository.java</div>

  1033. <div class="content">

  1034. <pre class="CodeRay highlight"><code data-lang="java"><span class="keyword">package</span> <span class="namespace">io.pivotal.workshop.snippet.repository</span>;

  1035. 

  1036. <span class="keyword">import</span> <span class="include">java.util.ArrayList</span>;

  1037. <span class="keyword">import</span> <span class="include">java.util.Collection</span>;

  1038. <span class="keyword">import</span> <span class="include">java.util.Date</span>;

  1039. <span class="keyword">import</span> <span class="include">java.util.List</span>;

  1040. <span class="keyword">import</span> <span class="include">java.util.Optional</span>;

  1041. 

  1042. <span class="keyword">import</span> <span class="include">org.springframework.stereotype.Repository</span>;

  1043. 

  1044. <span class="keyword">import</span> <span class="include">io.pivotal.workshop.snippet.domain.Snippet</span>;

  1045. 

  1046. <span class="annotation">@Repository</span>

  1047. <span class="directive">public</span> <span class="type">class</span> <span class="class">SnippetRepository</span> <span class="directive">implements</span> SimpleRepository&lt;Snippet&gt;{

  1048. 

  1049.         <span class="directive">private</span> <span class="predefined-type">List</span>&lt;Snippet&gt; snippets = <span class="keyword">new</span> <span class="predefined-type">ArrayList</span>&lt;&gt;();

  1050. 

  1051.         <span class="annotation">@Override</span>

  1052.         <span class="directive">public</span> Snippet saveAll(Snippet snippet){

  1053.                 <span class="keyword">assert</span> snippet.getTitle() != <span class="predefined-constant">null</span>;

  1054.                 <span class="keyword">assert</span> snippet.getCode() != <span class="predefined-constant">null</span>;

  1055.                 <span class="keyword">assert</span> snippet.getLang() != <span class="predefined-constant">null</span>;

  1056. 

  1057.                 Snippet _snippet =  <span class="predefined-constant">null</span>;

  1058. 

  1059.                 <span class="keyword">if</span> (snippet.getId() == <span class="predefined-constant">null</span>) {

  1060.                         _snippet = <span class="keyword">new</span> Snippet(snippet.getTitle(), snippet.getLang(),snippet.getCode());

  1061. 

  1062.                 } <span class="keyword">else</span> {

  1063.                          _snippet = <span class="local-variable">this</span>.findById(snippet.getId());

  1064.                          <span class="keyword">if</span>(_snippet != <span class="predefined-constant">null</span>){

  1065.                                  _snippet.setTitle(snippet.getTitle());

  1066.                                  _snippet.setCode(snippet.getCode());

  1067.                                  _snippet.setLang(snippet.getLang());

  1068.                                  _snippet.setModified(<span class="keyword">new</span> <span class="predefined-type">Date</span>());

  1069.                          }

  1070.                 }

  1071. 

  1072.                 <span class="keyword">return</span> _snippet;

  1073.         }

  1074. 

  1075.         <span class="annotation">@Override</span>

  1076.         <span class="directive">public</span> <span class="predefined-type">Iterable</span>&lt;Snippet&gt; findAll(){

  1077.                 <span class="keyword">return</span> <span class="local-variable">this</span>.snippets;

  1078.         }

  1079. 

  1080.         <span class="annotation">@Override</span>

  1081.         <span class="directive">public</span> Snippet findById(<span class="predefined-type">String</span> id){

  1082.                 Optional&lt;Snippet&gt; result = snippets.stream()

  1083.                                 .filter(snippet -&gt; snippet.getId().equals(id))

  1084.                                 .findFirst();

  1085. 

  1086.                 <span class="keyword">if</span> (result.isPresent()) <span class="keyword">return</span> result.get();

  1087. 

  1088.                 <span class="keyword">return</span> <span class="predefined-constant">null</span>;

  1089.         }

  1090. 

  1091.         <span class="annotation">@Override</span>

  1092.         <span class="directive">public</span> <span class="type">void</span> saveAll(<span class="predefined-type">Collection</span>&lt;Snippet&gt; items) {

  1093.                 <span class="local-variable">this</span>.snippets.addAll(items);

  1094.         }

  1095. }</code></pre>

  1096. </div>

  1097. </div>

  1098. </li>

  1099. <li>

  1100. <p>Next lets do the main controller that will expose the REST API:</p>

  1101. <div id="snippetController" class="listingblock">

  1102. <div class="title">io.pivotal.workshop.snippet.controller.SnippetController.java</div>

  1103. <div class="content">

  1104. <pre class="CodeRay highlight"><code data-lang="java"><span class="annotation">@RestController</span>

  1105. <span class="directive">public</span> <span class="type">class</span> <span class="class">SnippetController</span> {

  1106. 

  1107. 

  1108.         <span class="directive">private</span> SnippetRepository snippetRepository;

  1109.         <span class="directive">private</span> LanguageRepository languageRepository;

  1110. 

  1111.         <span class="directive">public</span> SnippetController(SnippetRepository snippetRepository,LanguageRepository languageRepository){

  1112.                 <span class="local-variable">this</span>.snippetRepository = snippetRepository;

  1113.                 <span class="local-variable">this</span>.languageRepository = languageRepository;

  1114.         }

  1115. 

  1116.         <span class="annotation">@RequestMapping</span>(<span class="string"><span class="delimiter">&quot;</span><span class="content">/</span><span class="delimiter">&quot;</span></span>)

  1117.         <span class="directive">public</span> ModelAndView home(){

  1118.                 <span class="keyword">assert</span> snippetRepository != <span class="predefined-constant">null</span>;

  1119. 

  1120.                 <span class="predefined-type">Map</span>&lt;<span class="predefined-type">String</span>,<span class="predefined-type">Object</span>&gt; model = <span class="keyword">new</span> <span class="predefined-type">HashMap</span>&lt;<span class="predefined-type">String</span>,<span class="predefined-type">Object</span>&gt;();

  1121.                 model.put(<span class="string"><span class="delimiter">&quot;</span><span class="content">langs</span><span class="delimiter">&quot;</span></span>, languageRepository.findAll());

  1122.                 model.put(<span class="string"><span class="delimiter">&quot;</span><span class="content">snippets</span><span class="delimiter">&quot;</span></span>, snippetRepository.findAll());

  1123. 

  1124.                 <span class="keyword">return</span> <span class="keyword">new</span> ModelAndView(<span class="string"><span class="delimiter">&quot;</span><span class="content">views/home</span><span class="delimiter">&quot;</span></span>,model);

  1125.         }

  1126. 

  1127.         <span class="annotation">@RequestMapping</span>(<span class="string"><span class="delimiter">&quot;</span><span class="content">/snippets</span><span class="delimiter">&quot;</span></span>)

  1128.         <span class="directive">public</span> ResponseEntity&lt;?&gt; snippets(){

  1129.                 <span class="keyword">assert</span> snippetRepository != <span class="predefined-constant">null</span>;

  1130.                 <span class="keyword">return</span> ResponseEntity.ok(snippetRepository.findAll());

  1131.         }

  1132. }</code></pre>

  1133. </div>

  1134. </div>

  1135. </li>

  1136. <li>

  1137. <p>Create a configuration class to initialize your repositories:</p>

  1138. <div class="listingblock">

  1139. <div class="title">io.pivotal.workshop.snippet.config.SnippetConfiguration.java</div>

  1140. <div class="content">

  1141. <pre class="CodeRay highlight"><code data-lang="java"><span class="keyword">package</span> <span class="namespace">io.pivotal.workshop.snippet.config</span>;

  1142. 

  1143. <span class="keyword">import</span> <span class="include">java.nio.file.Files</span>;

  1144. <span class="keyword">import</span> <span class="include">java.nio.file.Paths</span>;

  1145. <span class="keyword">import</span> <span class="include">java.util.ArrayList</span>;

  1146. <span class="keyword">import</span> <span class="include">java.util.List</span>;

  1147. 

  1148. <span class="keyword">import</span> <span class="include">org.springframework.boot.CommandLineRunner</span>;

  1149. <span class="keyword">import</span> <span class="include">org.springframework.context.annotation.Bean</span>;

  1150. <span class="keyword">import</span> <span class="include">org.springframework.context.annotation.Configuration</span>;

  1151. 

  1152. <span class="keyword">import</span> <span class="include">io.pivotal.workshop.snippet.domain.Code</span>;

  1153. <span class="keyword">import</span> <span class="include">io.pivotal.workshop.snippet.domain.Language</span>;

  1154. <span class="keyword">import</span> <span class="include">io.pivotal.workshop.snippet.domain.Snippet</span>;

  1155. <span class="keyword">import</span> <span class="include">io.pivotal.workshop.snippet.repository.SnippetRepository</span>;

  1156. 

  1157. <span class="annotation">@Configuration</span>

  1158. <span class="directive">public</span> <span class="type">class</span> <span class="class">SnippetConfiguration</span> {

  1159. 

  1160.         <span class="annotation">@Bean</span>

  1161.         <span class="directive">public</span> CommandLineRunner runner(SnippetRepository snippetRepo) {

  1162.                 <span class="keyword">return</span> args -&gt; {

  1163.                         <span class="annotation">@SuppressWarnings</span>(<span class="string"><span class="delimiter">&quot;</span><span class="content">serial</span><span class="delimiter">&quot;</span></span>)

  1164.                         <span class="predefined-type">List</span>&lt;Snippet&gt; snippets = <span class="keyword">new</span> <span class="predefined-type">ArrayList</span>&lt;Snippet&gt;() {

  1165.                                 {

  1166.                                         add(<span class="keyword">new</span> Snippet(<span class="string"><span class="delimiter">&quot;</span><span class="content">Hello World</span><span class="delimiter">&quot;</span></span>, <span class="keyword">new</span> Language(<span class="string"><span class="delimiter">&quot;</span><span class="content">HTML</span><span class="delimiter">&quot;</span></span>, <span class="string"><span class="delimiter">&quot;</span><span class="content">xml</span><span class="delimiter">&quot;</span></span>),<span class="keyword">new</span> Code(<span class="keyword">new</span> <span class="predefined-type">String</span>(Files.readAllBytes(Paths.get(<span class="string"><span class="delimiter">&quot;</span><span class="content">code/html-code.txt</span><span class="delimiter">&quot;</span></span>))))));

  1167.                                         add(<span class="keyword">new</span> Snippet(<span class="string"><span class="delimiter">&quot;</span><span class="content">Hello World</span><span class="delimiter">&quot;</span></span>, <span class="keyword">new</span> Language(<span class="string"><span class="delimiter">&quot;</span><span class="content">C#</span><span class="delimiter">&quot;</span></span>, <span class="string"><span class="delimiter">&quot;</span><span class="content">c#</span><span class="delimiter">&quot;</span></span>),<span class="keyword">new</span> Code(<span class="keyword">new</span> <span class="predefined-type">String</span>(Files.readAllBytes(Paths.get(<span class="string"><span class="delimiter">&quot;</span><span class="content">code/cs-code.txt</span><span class="delimiter">&quot;</span></span>))))));

  1168.                                         add(<span class="keyword">new</span> Snippet(<span class="string"><span class="delimiter">&quot;</span><span class="content">Hello World</span><span class="delimiter">&quot;</span></span>, <span class="keyword">new</span> Language(<span class="string"><span class="delimiter">&quot;</span><span class="content">Pascal</span><span class="delimiter">&quot;</span></span>, <span class="string"><span class="delimiter">&quot;</span><span class="content">py</span><span class="delimiter">&quot;</span></span>),<span class="keyword">new</span> Code(<span class="keyword">new</span> <span class="predefined-type">String</span>(Files.readAllBytes(Paths.get(<span class="string"><span class="delimiter">&quot;</span><span class="content">code/pas-code.txt</span><span class="delimiter">&quot;</span></span>))))));

  1169.                                         add(<span class="keyword">new</span> Snippet(<span class="string"><span class="delimiter">&quot;</span><span class="content">Hello World</span><span class="delimiter">&quot;</span></span>, <span class="keyword">new</span> Language(<span class="string"><span class="delimiter">&quot;</span><span class="content">Erlang</span><span class="delimiter">&quot;</span></span>, <span class="string"><span class="delimiter">&quot;</span><span class="content">erl</span><span class="delimiter">&quot;</span></span>),<span class="keyword">new</span> Code(<span class="keyword">new</span> <span class="predefined-type">String</span>(Files.readAllBytes(Paths.get(<span class="string"><span class="delimiter">&quot;</span><span class="content">code/erl-code.txt</span><span class="delimiter">&quot;</span></span>))))));

  1170.                                         add(<span class="keyword">new</span> Snippet(<span class="string"><span class="delimiter">&quot;</span><span class="content">Hello World</span><span class="delimiter">&quot;</span></span>, <span class="keyword">new</span> Language(<span class="string"><span class="delimiter">&quot;</span><span class="content">JavaScript</span><span class="delimiter">&quot;</span></span>, <span class="string"><span class="delimiter">&quot;</span><span class="content">js</span><span class="delimiter">&quot;</span></span>),<span class="keyword">new</span> Code(<span class="keyword">new</span> <span class="predefined-type">String</span>(Files.readAllBytes(Paths.get(<span class="string"><span class="delimiter">&quot;</span><span class="content">code/js-code.txt</span><span class="delimiter">&quot;</span></span>))))));

  1171.                                         add(<span class="keyword">new</span> Snippet(<span class="string"><span class="delimiter">&quot;</span><span class="content">Hello World</span><span class="delimiter">&quot;</span></span>, <span class="keyword">new</span> Language(<span class="string"><span class="delimiter">&quot;</span><span class="content">Groovy</span><span class="delimiter">&quot;</span></span>, <span class="string"><span class="delimiter">&quot;</span><span class="content">groovy</span><span class="delimiter">&quot;</span></span>),<span class="keyword">new</span> Code(<span class="string"><span class="delimiter">&quot;</span><span class="content">println 'Hello World'</span><span class="delimiter">&quot;</span></span>)));

  1172.                                 }

  1173.                         };

  1174. 

  1175.                         snippetRepo.saveAll(snippets);

  1176. 

  1177.                 };

  1178.         }

  1179. }</code></pre>

  1180. </div>

  1181. </div>

  1182. <div class="paragraph">

  1183. <p>as you can see from the above code, we are building up our data.</p>

  1184. </div>

  1185. <div class="paragraph">

  1186. <p>If you take a close look, we are using the <strong>Files.readAllBytes</strong> helper class to read from a file, and this file is located in the <strong>code/</strong> folder.</p>

  1187. </div>

  1188. </li>

  1189. <li>

  1190. <p>Add some code snippets in the <strong>code/</strong> folder.</p>

  1191. <div class="listingblock">

  1192. <div class="title">code/html-code.txt - HTML</div>

  1193. <div class="content">

  1194. <pre class="CodeRay highlight"><code data-lang="java">&lt;html&gt;

  1195.   &lt;body&gt;

  1196.     &lt;h1&gt;Hello World&lt;/h1&gt;

  1197.   &lt;/body&gt;

  1198. &lt;/html&gt;</code></pre>

  1199. </div>

  1200. </div>

  1201. <div class="listingblock">

  1202. <div class="title">code/cs-code.txt - C#</div>

  1203. <div class="content">

  1204. <pre class="CodeRay highlight"><code data-lang="csharp">class Hello {

  1205.  static void Main() {

  1206.   System.Console.Write(&quot;Hello World&quot;);

  1207.  }

  1208. }</code></pre>

  1209. </div>

  1210. </div>

  1211. <div class="listingblock">

  1212. <div class="title">code/pas-code.txt - Pascal</div>

  1213. <div class="content">

  1214. <pre class="CodeRay highlight"><code data-lang="ruby">program <span class="constant">HelloWorld</span>;

  1215. 

  1216. <span class="keyword">begin</span>

  1217.   writeln(<span class="string"><span class="delimiter">'</span><span class="content">Hello World</span><span class="delimiter">'</span></span>);

  1218. <span class="keyword">end</span>.</code></pre>

  1219. </div>

  1220. </div>

  1221. <div class="listingblock">

  1222. <div class="title">code/erl-code.txt - Erlang</div>

  1223. <div class="content">

  1224. <pre class="CodeRay highlight"><code data-lang="ruby"> -<span class="keyword">module</span>(hello).

  1225.  -export([hello_world/<span class="integer">0</span>]).

  1226. 

  1227.  hello_world() -&gt; <span class="key">io</span>:fwrite(<span class="string"><span class="delimiter">&quot;</span><span class="content">hello, world</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>).</code></pre>

  1228. </div>

  1229. </div>

  1230. <div class="listingblock">

  1231. <div class="title">code/js-code.txt - JavaScript</div>

  1232. <div class="content">

  1233. <pre class="CodeRay highlight"><code data-lang="ruby">console.log(<span class="string"><span class="delimiter">&quot;</span><span class="content">Hello World</span><span class="delimiter">&quot;</span></span>);</code></pre>

  1234. </div>

  1235. </div>

  1236. </li>

  1237. <li>

  1238. <p>A lot of code, right? Well now its time to run the application. You can use your IDE or command line. Once running you application, go to your browser and hit: <a href="http://localhost:8080/snippets" class="bare" target="_blank">http://localhost:8080/snippets</a> and you should get the a response like Figure 2.0.</p>

  1239. <div class="paragraph">

  1240. <div class="title">Figure 2.0: Snippet Code Manager - <a href="http://localhost:8080/snippets" class="bare" target="_blank">http://localhost:8080/snippets</a></div>

  1241. <p><span class="image"><img src="images/05-spring-boot-web-02.png" alt="/snippets" title="Snippet Code Manager"></span></p>

  1242. </div>

  1243. </li>

  1244. </ol>

  1245. </div>

  1246. </div>

  1247. </div>

  1248. <div class="sect1">

  1249. <h2 id="_challenges">Challenges</h2>

  1250. <div class="sectionbody">

  1251. <div class="sect2">

  1252. <h3 id="_adding_a_ui_home_page">Adding a UI - Home Page</h3>

  1253. <div class="paragraph">

  1254. <p>You can see that the <a href="#snippetController">io.pivotal.workshop.snippet.controller.SnippetController.java</a> has the <strong><em>home</em></strong>() method, and it returns the view: <strong><em>views/home</em></strong> and the <strong><em>model</em></strong>, a map that contains the languages and the snippets:

  1255. Add the following missing dependencies to your <strong>pom.xml</strong> because you will need them:</p>

  1256. </div>

  1257. <div class="listingblock">

  1258. <div class="content">

  1259. <pre class="CodeRay highlight"><code data-lang="xml"><span class="tag">&lt;dependency&gt;</span>

  1260.     <span class="tag">&lt;groupId&gt;</span>org.webjars<span class="tag">&lt;/groupId&gt;</span>

  1261.         <span class="tag">&lt;artifactId&gt;</span>jquery<span class="tag">&lt;/artifactId&gt;</span>

  1262.         <span class="tag">&lt;version&gt;</span>2.2.4<span class="tag">&lt;/version&gt;</span>

  1263. <span class="tag">&lt;/dependency&gt;</span>

  1264. <span class="tag">&lt;dependency&gt;</span>

  1265.         <span class="tag">&lt;groupId&gt;</span>org.webjars<span class="tag">&lt;/groupId&gt;</span>

  1266.         <span class="tag">&lt;artifactId&gt;</span>bootstrap<span class="tag">&lt;/artifactId&gt;</span>

  1267.         <span class="tag">&lt;version&gt;</span>3.3.6<span class="tag">&lt;/version&gt;</span>

  1268. <span class="tag">&lt;/dependency&gt;</span>

  1269. <span class="tag">&lt;dependency&gt;</span>

  1270.         <span class="tag">&lt;groupId&gt;</span>org.webjars<span class="tag">&lt;/groupId&gt;</span>

  1271.         <span class="tag">&lt;artifactId&gt;</span>angularjs<span class="tag">&lt;/artifactId&gt;</span>

  1272.         <span class="tag">&lt;version&gt;</span>1.5.7<span class="tag">&lt;/version&gt;</span>

  1273. <span class="tag">&lt;/dependency&gt;</span></code></pre>

  1274. </div>

  1275. </div>

  1276. <div class="paragraph">

  1277. <p>Add the following libraries in the <strong>src/main/resources/static/css</strong>:

  1278. <a href="artifacts/spring-boot-web/theme.html" target="_blank">theme.css</a> and <a href="artifacts/spring-boot-web/offcanvas.html" target="_blank">offcanvas.css</a>

  1279. and in the <strong>src/main/resources/static/js</strong> folder add the <a href="artifacts/spring-boot-web/syntaxhighlighter.html" target="_blank">syntaxhighlighter.js</a> script.</p>

  1280. </div>

  1281. <div class="ulist">

  1282. <ul>

  1283. <li>

  1284. <p>Create the necessary layout and home page to have the same as Figure 3.0.</p>

  1285. <div class="paragraph">

  1286. <div class="title">Figure 3.0: Code Snippet Manager - <a href="http://localhost:8080" class="bare" target="_blank">http://localhost:8080</a></div>

  1287. <p><span class="image"><img src="images/05-spring-boot-web-03.png" alt="/" title="Snippet Code Manager"></span></p>

  1288. </div>

  1289. </li>

  1290. </ul>

  1291. </div>

  1292. <div class="admonitionblock tip">

  1293. <table>

  1294. <tr>

  1295. <td class="icon">

  1296. <div class="title">Tip</div>

  1297. </td>

  1298. <td class="content">

  1299. You can take a look at the Groovy Template Engine: <a href="http://docs.groovy-lang.org/next/html/documentation/template-engines.html#_the_markuptemplateengine" class="bare" target="_blank">http://docs.groovy-lang.org/next/html/documentation/template-engines.html#_the_markuptemplateengine</a>

  1300. </td>

  1301. </tr>

  1302. </table>

  1303. </div>

  1304. </div>

  1305. <div class="sect2">

  1306. <h3 id="_rest_api">REST API</h3>

  1307. <div class="ulist">

  1308. <ul>

  1309. <li>

  1310. <p>Complete the RESTful API:</p>

  1311. <div class="ulist">

  1312. <ul>

  1313. <li>

  1314. <p>provide the <strong>/snippets/{id}</strong> path endpoint to search by snippet Id.</p>

  1315. </li>

  1316. <li>

  1317. <p>provide methods to handle the: <strong>POST</strong>, <strong>PUT</strong> for adding a new snippet and updating the snippet.</p>

  1318. </li>

  1319. </ul>

  1320. </div>

  1321. </li>

  1322. <li>

  1323. <p>Make changes to repose either <strong>JSON</strong> or <strong>XML</strong>.</p>

  1324. </li>

  1325. <li>

  1326. <p>When doing a XML response, the snippet code should be in a <strong>CDATA</strong> tag. Modify the code to show a <strong>CDATA</strong> for every source code. (<strong>tip</strong>: <strong><em>@JacksonXmlCData</em></strong>)</p>

  1327. </li>

  1328. </ul>

  1329. </div>

  1330. </div>

  1331. </div>

  1332. </div>

  1333. <div class="sect1">

  1334. <h2 id="__homework">[HOMEWORK]</h2>

  1335. <div class="sectionbody">

  1336. <div class="ulist">

  1337. <ul>

  1338. <li>

  1339. <p>Add validation to the <strong>POST</strong> and <strong>PUT</strong> methods (<strong>tip</strong>: <em>@Valid</em>).</p>

  1340. </li>

  1341. <li>

  1342. <p>Finish up any missing <strong>UI</strong> or <strong>Controller</strong> methods.</p>

  1343. </li>

  1344. </ul>

  1345. </div>

  1346. </div>

  1347. </div>

  1348. </div>

  1349. <div id="footer">

  1350. <div id="footer-text">

  1351. Last updated 2017-11-18 11:05:06 PST

  1352. </div>

  1353. </div>

  1354. </body>

  1355. </html>