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| <h1>Getting Started with Codewind in CodeReady Workspaces</h1> |
| <!--<p>20 Oct 2020</p>--> |
| <p>Use CodeReady Workspaces to develop cloud-native applications from an OpenShift cluster.</p> |
| <h2>Objectives</h2> |
| <ul> |
| |
| <li> |
| Install CodeReady Workspaces and Codewind. |
| </li> |
| |
| <li> |
| Create a Codewind workspace within CodeReady Workspaces. |
| </li> |
| |
| <li> |
| Develop a simple microservice with the Codewind workspace. |
| </li> |
| |
| </ul> |
| |
| <div role="main"><h2 id="overview">Overview</h2> |
| <p>Use Eclipse Codewind to develop microservice applications from application stacks in an integrated developer environment (IDE). CodeReady Workspaces provides a containerized IDE for cloud-native application development on an OpenShift cluster.</p> |
| |
| <h2 id="developing-with-codeready-workspaces">Developing with CodeReady Workspaces</h2> |
| <p>CodeReady Workspaces uses Kubernetes and containers to provide a preconfigured environment. Use CodeReady Workspaces to create, build, and test your code in OpenShift containers but feel like you are working on an IDE on your local machine.</p> |
| |
| <h3 id="prerequisite">Prerequisite</h3> |
| <p>Before you can use Codewind with CodeReady Workspaces, you must have an OpenShift cluster available. To install OpenShift clusters, see <a href="https://code-ready.github.io/crc/">CodeReady Containers</a>.</p> |
| |
| <p>CodeReady Workspaces require at least two 5Gi ReadWriteOnce (RWO) persistent volumes on the cluster to install and a 5Gi RWO volume for each created workspace.</p> |
| |
| <p>Each Codewind workspace also requires at least one 5Gi ReadWriteMany (RWX) persistent volume.</p> |
| |
| <h3 id="installing-codeready-workspaces">Installing CodeReady Workspaces</h3> |
| <p>1. Log in to your OpenShift cluster’s dashboard.</p> |
| |
| <p>2. From the sidebar, click <strong>Operators</strong> then <strong>OperatorHub</strong>.</p> |
| |
| <p>3. Search for <code class="highlighter-rouge">CodeReady Workspaces</code>.</p> |
| |
| <p>4. Select <strong>Red Hat CodeReady Workspaces</strong>:</p> |
| |
| <p><img src="./images/codereadyworkspaces-images/CRW-OperatorHub.png" alt="Subscribe to OperatorHub" width="900" />.</p> |
| |
| <p>5. Click <strong>Install</strong>:</p> |
| |
| <p><img src="./images/codereadyworkspaces-images/CRW-Install.png" alt="Install CodeReady Workspaces" width="800" />.</p> |
| |
| <p>After you install the operator, continue to install CodeReady Workspaces:</p> |
| |
| <p>1. From the OpenShift dashboard, go to <code class="highlighter-rouge">Operators</code>><code class="highlighter-rouge">Installed Operators</code>.</p> |
| |
| <p>2. Select <strong>CodeReady Workspaces</strong>.</p> |
| |
| <p>3. Select the <strong>CodeReady Workspaces</strong> cluster then <strong>Create CheCluster</strong>.</p> |
| |
| <p>4. Configure the fields, like <strong>tlsSupport</strong>, as needed.</p> |
| |
| <p>5. Copy and paste the following yaml into the provided text box:</p> |
| |
| <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">apiVersion</span><span class="pi">:</span> <span class="s">org.eclipse.che/v1</span> |
| <span class="na">kind</span><span class="pi">:</span> <span class="s">CheCluster</span> |
| <span class="na">metadata</span><span class="pi">:</span> |
| <span class="na">name</span><span class="pi">:</span> <span class="s">codeready-workspaces</span> |
| <span class="na">spec</span><span class="pi">:</span> |
| <span class="na">server</span><span class="pi">:</span> |
| <span class="na">cheImageTag</span><span class="pi">:</span> <span class="s1">'</span><span class="s">'</span> |
| <span class="na">cheFlavor</span><span class="pi">:</span> <span class="s">codeready</span> |
| <span class="na">devfileRegistryImage</span><span class="pi">:</span> <span class="s1">'</span><span class="s">'</span> |
| <span class="na">pluginRegistryImage</span><span class="pi">:</span> <span class="s1">'</span><span class="s">'</span> |
| <span class="na">tlsSupport</span><span class="pi">:</span> <span class="no">true</span> |
| <span class="na">selfSignedCert</span><span class="pi">:</span> <span class="no">true</span> |
| <span class="na">cheWorkspaceClusterRole</span><span class="pi">:</span> <span class="s1">'</span><span class="s">eclipse-codewind'</span> |
| <span class="na">customCheProperties</span><span class="pi">:</span> |
| <span class="na">CHE_INFRA_KUBERNETES_WORKSPACE__START__TIMEOUT__MIN</span><span class="pi">:</span> <span class="s2">"</span><span class="s">15"</span> |
| <span class="na">CHE_LIMITS_WORKSPACE_IDLE_TIMEOUT</span><span class="pi">:</span> <span class="s2">"</span><span class="s">0"</span> |
| <span class="na">CHE_WORKSPACE_PLUGIN__BROKER_WAIT__TIMEOUT__MIN</span><span class="pi">:</span> <span class="s2">"</span><span class="s">15"</span> |
| <span class="na">database</span><span class="pi">:</span> |
| <span class="na">externalDb</span><span class="pi">:</span> <span class="no">false</span> |
| <span class="na">chePostgresHostName</span><span class="pi">:</span> <span class="s1">'</span><span class="s">'</span> |
| <span class="na">chePostgresPort</span><span class="pi">:</span> <span class="s1">'</span><span class="s">'</span> |
| <span class="na">chePostgresUser</span><span class="pi">:</span> <span class="s1">'</span><span class="s">'</span> |
| <span class="na">chePostgresPassword</span><span class="pi">:</span> <span class="s1">'</span><span class="s">'</span> |
| <span class="na">chePostgresDb</span><span class="pi">:</span> <span class="s1">'</span><span class="s">'</span> |
| <span class="na">auth</span><span class="pi">:</span> |
| <span class="na">openShiftoAuth</span><span class="pi">:</span> <span class="no">false</span> |
| <span class="na">identityProviderImage</span><span class="pi">:</span> <span class="s1">'</span><span class="s">'</span> |
| <span class="na">externalIdentityProvider</span><span class="pi">:</span> <span class="no">false</span> |
| <span class="na">identityProviderURL</span><span class="pi">:</span> <span class="s1">'</span><span class="s">'</span> |
| <span class="na">identityProviderRealm</span><span class="pi">:</span> <span class="s1">'</span><span class="s">'</span> |
| <span class="na">identityProviderClientId</span><span class="pi">:</span> <span class="s1">'</span><span class="s">'</span> |
| <span class="na">storage</span><span class="pi">:</span> |
| <span class="na">pvcStrategy</span><span class="pi">:</span> <span class="s">per-workspace</span> |
| <span class="na">pvcClaimSize</span><span class="pi">:</span> <span class="s">1Gi</span> |
| <span class="na">preCreateSubPaths</span><span class="pi">:</span> <span class="no">true</span> |
| </code></pre></div></div> |
| |
| <p><img src="./images/codereadyworkspaces-images/CRW-CheCluster.png" alt="Install CheCluster" width="900" />.</p> |
| |
| <ul> |
| <li><strong>Note:</strong> If you install CodeReady Workspaces on an OpenShift cluster with publicly signed certificates, such as on IBM Cloud, set <strong>selfSignedCert</strong> to <strong>false</strong>.</li> |
| </ul> |
| |
| <p>6. After CodeReady Workspaces installs, click the <strong>CodeReady Workspaces URL</strong>.</p> |
| |
| <p>7. A new window appears that prompts you to log in. If you have not made a CodeReady Workspaces account, do so by clicking <strong>Register</strong>:</p> |
| |
| <p><img src="./images/codereadyworkspaces-images/CRW-Register.png" alt="Register an account" width="900" />.</p> |
| |
| <p>8. After you make a CodeReady Workspaces account, you can start to create a Codewind workspace.</p> |
| |
| <h3 id="setting-up-codewind">Setting up Codewind</h3> |
| <p>Because of its dependency on <code class="highlighter-rouge">buildah</code>, Codewind needs to run as root and privileged. To enable Codewind, run the following commands from your command line:</p> |
| <ul> |
| <li><code class="highlighter-rouge">oc adm policy add-scc-to-user anyuid system:serviceaccounts:<namespace where you installed CodeReady Workspaces>:che-workspace</code></li> |
| <li><code class="highlighter-rouge">oc adm policy add-scc-to-user privileged system:serviceaccounts:<namespace where you installed CodeReady Workspaces>:che-workspace</code></li> |
| </ul> |
| |
| <p>CodeReady Workspaces starts Codewind and installs the Codewind plug-ins. This process might take a couple of minutes for all of the necessary components to be pulled and started.</p> |
| |
| <h3 id="creating-the-codewind-workspace">Creating the Codewind workspace</h3> |
| <p>After you set up Codewind, log in to your CodeReady Workspaces account and create a Codewind workspace from the Codewind devfile:</p> |
| |
| <p>1. Log in to CodeReady Workspaces.</p> |
| |
| <p>2. Go to <strong>Workspaces</strong> then click <strong>Add Workspace</strong>.</p> |
| |
| <p>3. Click <strong>Import Devfile</strong>.</p> |
| |
| <p>4. From <strong>Source</strong>, click <strong>YAML</strong>.</p> |
| |
| <p>5. Go to the link, <a href="https://raw.githubusercontent.com/eclipse/codewind-che-plugin/0.14.1/devfiles/0.14.1/devfile.yaml">codewind-che-plugin/0.14.1/devfile.yaml</a>, then copy and paste the contents into the YAML text box in your Codewind workspace.</p> |
| |
| <p>6. Click <strong>Create & Open</strong>.</p> |
| |
| <h3 id="configuring-codewind-to-use-application-stacks">Configuring Codewind to use application stacks</h3> |
| <p>Configure Codewind to use Appsody templates so you can focus exclusively on your code. Complete the following steps to select the Appsody templates:</p> |
| |
| <ol> |
| <li>Select <strong>Codewind</strong>.</li> |
| <li>Right-click <strong>Projects</strong>.</li> |
| <li>Select <strong>Template Source Manager</strong>.</li> |
| <li>Enable <strong>Appsody Stacks - incubator</strong> and <strong>Default templates</strong>.</li> |
| </ol> |
| |
| <p>After you configured Codewind to use Appsody templates, continue to develop your microservice within Codewind.</p> |
| |
| <h3 id="creating-an-appsody-project">Creating an Appsody project</h3> |
| <p>Throughout the application lifestyle, Appsody helps you develop containerized applications and maximize containers curated for your usage.</p> |
| |
| <ol> |
| <li>Under the Explorer pane, select <strong>Codewind</strong>.</li> |
| <li>Expand <strong>Codewind</strong> by clicking the drop-down arrow.</li> |
| <li>Hover over the <strong>Projects</strong> entry underneath Codewind in the Explorer pane, and press the <strong>+</strong> icon to create a project. |
| <ul> |
| <li><strong>Note:</strong> Make sure that Docker is running. Otherwise, you get an error.</li> |
| </ul> |
| </li> |
| <li>Choose the <strong>Appsody Open Liberty default template (Appsody Stacks - incubator)</strong>.</li> |
| <li>Name your project <strong>appsody-calculator</strong>. |
| <ul> |
| <li>If you don’t see Appsody templates, find and select <strong>Template Source Manager</strong> and enable <strong>Appsody Stacks - incubator</strong>.</li> |
| <li>The templates are refreshed, and the Appsody templates are available.</li> |
| </ul> |
| </li> |
| <li>Press <strong>Enter</strong>. |
| <ul> |
| <li>To monitor your project’s progress, right-click your project, and select <strong>Show all logs</strong>. Then, an <strong>Output</strong> tab is displayed where you see your project’s build logs.</li> |
| </ul> |
| </li> |
| </ol> |
| |
| <p>Your project is complete when you see that your application status is running and your build status is successful.</p> |
| |
| <h3 id="accessing-the-application-endpoint-in-a-browser">Accessing the application endpoint in a browser</h3> |
| <ol> |
| <li>Return to your project under the <strong>Explorer</strong> pane.</li> |
| <li>Select the Open App icon next to your project’s name, or right-click your project and select <strong>Open App</strong>.</li> |
| </ol> |
| |
| <p>Your application is now opened in a browser, showing the welcome to your Appsody microservice page.</p> |
| |
| <h3 id="adding-a-rest-service-to-your-application">Adding a REST service to your application</h3> |
| <ol> |
| <li>Go to your project’s workspace under the <strong>Explorer</strong> pane.</li> |
| <li>Go to <code class="highlighter-rouge">src</code>><code class="highlighter-rouge">main</code>><code class="highlighter-rouge">java</code>><code class="highlighter-rouge">dev</code>><code class="highlighter-rouge">appsody</code>><code class="highlighter-rouge">starter</code>.</li> |
| <li>Right-click <strong>starter</strong> and select <strong>New File</strong>.</li> |
| <li>Create a file, name it <code class="highlighter-rouge">Calculator.java</code>, and press <strong>Enter</strong>. This file is your JAX-RS resource.</li> |
| <li>Before you input any code, make sure that the file is empty.</li> |
| <li>Populate the file with the following code and then <strong>save</strong> the file:</li> |
| </ol> |
| |
| <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">package</span> <span class="n">dev</span><span class="o">.</span><span class="na">appsody</span><span class="o">.</span><span class="na">starter</span><span class="o">;</span> |
| |
| <span class="kn">import</span> <span class="nn">javax.ws.rs.core.Application</span><span class="o">;</span> |
| <span class="kn">import</span> <span class="nn">javax.ws.rs.GET</span><span class="o">;</span> |
| <span class="kn">import</span> <span class="nn">javax.ws.rs.Path</span><span class="o">;</span> |
| <span class="kn">import</span> <span class="nn">javax.ws.rs.Produces</span><span class="o">;</span> |
| <span class="kn">import</span> <span class="nn">javax.ws.rs.core.MediaType</span><span class="o">;</span> |
| <span class="kn">import</span> <span class="nn">javax.ws.rs.core.Response</span><span class="o">;</span> |
| |
| <span class="kn">import</span> <span class="nn">javax.ws.rs.PathParam</span><span class="o">;</span> |
| |
| <span class="nd">@Path</span><span class="o">(</span><span class="s">"/calculator"</span><span class="o">)</span> |
| <span class="kd">public</span> <span class="kd">class</span> <span class="nc">Calculator</span> <span class="kd">extends</span> <span class="nc">Application</span> <span class="o">{</span> |
| |
| <span class="nd">@GET</span> |
| <span class="nd">@Path</span><span class="o">(</span><span class="s">"/aboutme"</span><span class="o">)</span> |
| <span class="nd">@Produces</span><span class="o">(</span><span class="nc">MediaType</span><span class="o">.</span><span class="na">TEXT_PLAIN</span><span class="o">)</span> |
| <span class="kd">public</span> <span class="nc">String</span> <span class="nf">aboutme</span><span class="o">()</span> <span class="o">{</span> |
| <span class="k">return</span> <span class="s">"You can add (+), subtract (-), and multiply (*) with this simple calculator."</span><span class="o">;</span> |
| <span class="o">}</span> |
| |
| <span class="nd">@GET</span> |
| <span class="nd">@Path</span><span class="o">(</span><span class="s">"/{op}/{a}/{b}"</span><span class="o">)</span> |
| <span class="nd">@Produces</span><span class="o">(</span><span class="nc">MediaType</span><span class="o">.</span><span class="na">TEXT_PLAIN</span><span class="o">)</span> |
| <span class="kd">public</span> <span class="nc">Response</span> <span class="nf">calculate</span><span class="o">(</span><span class="nd">@PathParam</span><span class="o">(</span><span class="s">"op"</span><span class="o">)</span> <span class="nc">String</span> <span class="n">op</span><span class="o">,</span> <span class="nd">@PathParam</span><span class="o">(</span><span class="s">"a"</span><span class="o">)</span> <span class="nc">String</span> <span class="n">a</span><span class="o">,</span> <span class="nd">@PathParam</span><span class="o">(</span><span class="s">"b"</span><span class="o">)</span> <span class="nc">String</span> <span class="n">b</span><span class="o">)</span> <span class="o">{</span> |
| <span class="kt">int</span> <span class="n">numA</span> <span class="o">=</span> <span class="nc">Integer</span><span class="o">.</span><span class="na">parseInt</span><span class="o">(</span><span class="n">a</span><span class="o">);</span> |
| <span class="kt">int</span> <span class="n">numB</span> <span class="o">=</span> <span class="nc">Integer</span><span class="o">.</span><span class="na">parseInt</span><span class="o">(</span><span class="n">b</span><span class="o">);</span> |
| |
| <span class="k">switch</span> <span class="o">(</span><span class="n">op</span><span class="o">)</span> <span class="o">{</span> |
| <span class="k">case</span> <span class="s">"+"</span><span class="o">:</span> |
| <span class="k">return</span> <span class="nc">Response</span><span class="o">.</span><span class="na">ok</span><span class="o">(</span><span class="n">a</span> <span class="o">+</span> <span class="s">"+"</span> <span class="o">+</span> <span class="n">b</span> <span class="o">+</span> <span class="s">"="</span> <span class="o">+</span> <span class="o">(</span><span class="nc">Integer</span><span class="o">.</span><span class="na">toString</span><span class="o">((</span><span class="n">numA</span> <span class="o">+</span> <span class="n">numB</span><span class="o">)))).</span><span class="na">build</span><span class="o">();</span> |
| |
| <span class="k">case</span> <span class="s">"-"</span><span class="o">:</span> |
| <span class="k">return</span> <span class="nc">Response</span><span class="o">.</span><span class="na">ok</span><span class="o">(</span><span class="n">a</span> <span class="o">+</span> <span class="s">"-"</span> <span class="o">+</span> <span class="n">b</span> <span class="o">+</span> <span class="s">"="</span> <span class="o">+</span> <span class="o">(</span><span class="nc">Integer</span><span class="o">.</span><span class="na">toString</span><span class="o">((</span><span class="n">numA</span> <span class="o">-</span> <span class="n">numB</span><span class="o">)))).</span><span class="na">build</span><span class="o">();</span> |
| |
| <span class="k">case</span> <span class="s">"*"</span><span class="o">:</span> |
| <span class="k">return</span> <span class="nc">Response</span><span class="o">.</span><span class="na">ok</span><span class="o">(</span><span class="n">a</span> <span class="o">+</span> <span class="s">"*"</span> <span class="o">+</span> <span class="n">b</span> <span class="o">+</span> <span class="s">"="</span> <span class="o">+</span> <span class="o">(</span><span class="nc">Integer</span><span class="o">.</span><span class="na">toString</span><span class="o">((</span><span class="n">numA</span> <span class="o">*</span> <span class="n">numB</span><span class="o">)))).</span><span class="na">build</span><span class="o">();</span> |
| |
| <span class="k">default</span><span class="o">:</span> |
| <span class="k">return</span> <span class="nc">Response</span><span class="o">.</span><span class="na">ok</span><span class="o">(</span><span class="s">"Invalid operation. Please Try again"</span><span class="o">).</span><span class="na">build</span><span class="o">();</span> |
| <span class="o">}</span> |
| <span class="o">}</span> |
| <span class="o">}</span> |
| </code></pre></div></div> |
| |
| <p>Any changes that you make to your code are automatically built and redeployed by Codewind, and you can view them in your browser.</p> |
| |
| <h3 id="working-with-the-example-calculator-microservice">Working with the example calculator microservice</h3> |
| <p>You now can work with the example calculator microservice.</p> |
| |
| <ol> |
| <li>Use the URL that you saw when you first opened the application.</li> |
| <li>Make sure to remove the <code class="highlighter-rouge">< ></code> symbol in the URL.</li> |
| <li><code class="highlighter-rouge"><url>/starter/calculator/aboutme</code></li> |
| <li>You see the following response:</li> |
| </ol> |
| |
| <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>You can add (+), subtract (-), and multiply (*) with this simple calculator. |
| </code></pre></div></div> |
| |
| <p>You can also try a few of the sample calculator functions:</p> |
| |
| <ul> |
| <li><code class="highlighter-rouge"><url>/starter/calculator/{op}/{a}/{b}</code>, where you can input one of the available operations <code class="highlighter-rouge">(+, _, *)</code>, and an integer a, and an integer b.</li> |
| <li>So for <code class="highlighter-rouge"><url>/starter/calculator/+/10/3</code> you see: <code class="highlighter-rouge">10+3=13</code>.</li> |
| </ul> |
| |
| <h2 id="what-you-have-learned">What you have learned</h2> |
| <p>Now that you have completed this quick guide, you have learned to:</p> |
| |
| <ol> |
| <li>Install CodeReady Workspaces and Codewind.</li> |
| <li>Create a Codewind workspace within CodeReady Workspaces.</li> |
| <li>Develop a simple microservice with the Codewind workspace.</li> |
| </ol> |
| |
| <h2 id="next-steps">Next Steps</h2> |
| <p>See other quick guides to learn how to develop with Codewind:</p> |
| |
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| <li><a href="codewind-eclipse-quick-guide.html">Codewind in Eclipse</a></li> |
| <li><a href="https://www.eclipse.org/codewind/codewind-vscode-quick-guide.html">Codewind in VS Code</a></li> |
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