Write a simple Confluence blueprint plugin

Before you begin

To complete this tutorial, you should:

• Work through the Atlassian Plugin SDK tutorial.

Plugin source

If you want to skip ahead or check your work when you finish, you can find the plugin source code on Atlassian Bitbucket. Alternatively, you can download the source as a ZIP archive.  To clone the repository, issue the following command:

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git clone https://bitbucket.org/atlassian_tutorial/confluence-simple-blueprint.git

Step 1. Create the plugin project and prune the skeleton

In this step, you'll generate skeleton code for your plugin.  Since you won't need many of the skeleton files, you also delete those unused files in this step. 

1. Open a Terminal on your machine and navigate to directory where you normally keep your plugin code.

2. To create a plugin skeleton, run the following command:

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   atlas-create-confluence-plugin

   The atlas- commands are part of the Atlassian Plugin SDK, and automate some of the work of plugin development for you.  

3. To identify your plugin enter the following information:

   group-id	com.example.plugins.tutorial.confluence.simplebp
   artifact-id	simplebp
   version	1.0-SNAPSHOT
   package	com.example.plugins.tutorial.confluence.simplebp

4. Confirm your entries when prompted.
   The SDK creates your project skeleton and puts it in a simplebp directory. 

5. Navigate to the simplebp directory created in the previous step.

6. Delete the test directories.

   Setting up blueprint testing is not part of this tutorial. Use the following command to delete the generated test skeleton:

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   rm -rf ./src/test/java
   rm -rf ./src/test/resources/

7. Delete the unneeded Java class files.

   A basic blueprint doesn't require you to write any Java code. Use the following command to delete the generated Java class skeleton:

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   rm -rf ./src/main/java/com/example/plugins/tutorial/confluence/simplebp/*

8. Import the project into your favorite IDE

Step 2. Run your plugin 

At this point, you haven't actually done anything but create a skeleton plugin.  You can run that skeleton in Confluence anyway.  In this step, you do just that.  

1. To start a local Confluence instance, run the following command:

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   atlas-run

   This command takes a minute or so to run. It builds your plugin code, starts a Confluence instance, and installs your plugin. When the process has finished, you see many status lines on your screen concluding with something like the following:

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   [INFO] [talledLocalContainer] INFO: Starting Coyote HTTP/1.1 on http-1990
   [INFO] [talledLocalContainer] Tomcat 8.x started on port [1990]
   [INFO] confluence started successfully in 132s at http://localhost:1990/confluence
   [INFO] Type Ctrl-D to shutdown gracefully
   [INFO] Type Ctrl-C to exit

   You'll see the output includes a URL for the Confluence instance.

2. Log into the instance as user admin using a password of admin.
   The Confluence Dashboard appears.

3. Leave Confluence running in your browser.
    

Step 3. Create some page content for your template

A template is an XML file that describes a page using Confluence source format. The simplest blueprints need only an XHTML template to do something cool.
In this step, use Confluence to design a simple template, and then use the Confluence Source Editor add-on to copy the source format.
In your browser where Confluence is running do the following:

1. In the Confluence header click Spaces > Demonstration Space.
2. At the top of the page, click Create The system displays the Create dialog. It is this dialog you customize by adding your own blueprint to it. 
    
3. Click the Blank page item, and then click the Create button.
   The system puts you in a new page. 

4. Add a two column table to the page.

   Name	Date
   Enter your name here.	Enter today's date here.

5. Enter a title of your page Template Content, and then click Save.

6. Go to > View Storage Format.  

7. The storage format of the page opens in a new browser window. It should look like:

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   <p class="auto-cursor-target"><br/></p>
      <table>
          <colgroup>
              <col/>
              <col/>
          </colgroup>
          <tbody>
              <tr>
                  <th>Name</th>
                  <th>Date</th>
              </tr>
              <tr>
                  <td>Enter your name here.</td>
                  <td>Enter today’s date here.</td>
              </tr>
          </tbody>
      </table>
      <p><br/></p>

   Leave it open for now. 

Step 4. Create a template for your project

Your plugin must include the template file in its directory structure. By convention, a template is a plugin resource so a good place to store your template is in the resource directory. At this point, you have Confluence with the source content displayed. So, open a second Terminal window on your local machine and do the following:

1. Navigate to the root of your simplebp project directory.

2. Create a templates subdirectory in resources.

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   mkdir src/main/resources/templates

3. Create a mytemplate.xml file in your newly created templates directory. 

4. Open the mytemplate.xml file for editing.
5. Open the browser window with the source content.

6. Copy the storage format into the mytemplate.xml file and close the browser window.

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   <table>
     <tbody>
       <tr>
         <th>Name</th>
         <th>Date</th>
       </tr>
       <tr>
         <td>Enter your name here</td>
         <td>Enter today's date here</td>
       </tr>
     </tbody>
   </table>

7. Save and close the mytemplate.xml file.

Step 5. Add additional resources to your project

In this step, you'll modify the generated simplebp.properties file that supports internationalization. You'll also add an image to your project to represent your blueprint in the Create dialog. In your Terminal, do the following:

1. Edit your project's src/main/resources/simplebp.properties file

2. Replace the auto-generated properties with following:

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   my.blueprint.name=Example Blueprint
   my.blueprint.title=Sample Template
   my.create-link.title=My Sample Template
   my.create-link.description=Create a new SimpleBP template

   You can change the title of the template or the description to anything you want.

3. Save and close the simplebp.properties file.

4. Save myblueprint.png image to your project's src/main/resources/images directory.
   

5. Check your work.
   At this point, your project's src/main/resources directory should contain the following files:

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   |____atlassian-plugin.xml
   |____css
   | |____simplebp.css
   |____images
   | |____myblueprint.png
   | |____pluginIcon.png
   | |____pluginLogo.png
   |____js
   | |____simplebp.js
   |____simplebp.properties
   |____templates
   | |____mytemplate.xml

Step 6. Add the modules to the atlassian-plugin.xml file

Each blueprint relies on three component modules:

To add the modules to the file, on your plugin project root, do the following:

1. Edit the src/main/resources/atlassian-plugin.xml file.

2. Add a content-template module for your template.

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   <!-- Template for Blueprint -->
      <content-template key="simplebp-template" i18n-name-key="my.blueprint.title">
          <resource name="template" type="download" location="/templates/mytemplate.xml" />
      </content-template>

3. Add a blueprint module for your template.
    

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``` xml
<!-- Blueprint -->
<blueprint key="my-blueprint" content-template-key="simplebp-template" index-key="my-index" i18n-name-key="my.blueprint.name"/>
```

1. Add a link for your template to the Create dialog.

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    <!-- Add to the Create Menu -->
   <web-item key="create-by-sample-template" i18n-name-key="my.create-link.title" section="system.create.dialog/content">
       <description key="my.create-link.description" />
       <resource name="icon" type="download" location="/images/myblueprint.png" />
       <param name="blueprintKey" value="my-blueprint" />
    </web-item>

2. Check your work.

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   <atlassian-plugin key="${atlassian.plugin.key}" name="${project.name}" plugins-version="2">
       <plugin-info>
           <description>${project.description}</description>
           <version>${project.version}</version>
           <vendor name="${project.organization.name}" url="${project.organization.url}" />
           <param name="plugin-icon">images/pluginIcon.png</param>
           <param name="plugin-logo">images/pluginLogo.png</param>
       </plugin-info>
       <!-- add our i18n resource -->
       <resource type="i18n" name="i18n" location="simplebp"/>
   
       <!-- add our web resources -->
       <web-resource key="simplebp-resources" name="simplebp Web Resources">
           <dependency>com.atlassian.auiplugin:ajs</dependency>
   
           <resource type="download" name="simplebp.css" location="/css/simplebp.css"/>
           <resource type="download" name="simplebp.js" location="/js/simplebp.js"/>
           <resource type="download" name="images/" location="/images"/>
           <context>simplebp</context>
       </web-resource>
   
       <!-- Template for Blueprint -->
       <content-template key="simplebp-template" i18n-name-key="my.blueprint.title">
           <resource name="template" type="download" location="/templates/mytemplate.xml" />
       </content-template>
   
       <!-- Add to the Create Menu -->
       <web-item key="create-by-sample-template" i18n-name-key="my.create-link.title" section="system.create.dialog/content">
           <description key="my.create-link.description" />
           <resource name="icon" type="download" location="/images/myblueprint.png" />
           <param name="blueprintKey" value="my-blueprint" />
        </web-item>
   
       <!-- Blueprint -->
       <blueprint key="my-blueprint" content-template-key="simplebp-template" index-key="my-index" i18n-name-key="my.blueprint.name"/>      
   
   </atlassian-plugin>

3. Save and close your atlassian-plugin.xml file.

Step 7. Build your changes and see your plugin in action

Now, you are ready to build your plugin and see it in action.

1. Rebuild your plugin from the command line using the following command that triggers QuickReload.

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   atlas-package

2. Make sure you are still in the Demonstration Space.

3. Click Create. The Create dialog appears and now contains your blueprint entry.
    
4. Click the My Sample Template option.
   The system creates a new page using your template.

Next steps

Now that you know how to create blueprint plugin you’re ready to take it to the next level. Check out the tutorial for building an intermediate blueprint plugin or try to write a Confluence Space blueprint.