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In its simplest form, a deployable plugin consists of the following components packaged in a single JAR file:
Fortunately, you don't have to try to develop these by hand. You can create them using the Atlassian Plugin SDK. Before starting, please make sure that you have set up your development environment and installed the Atlassian Plugin SDK, as described in the installation guide. Now you can start building your plugin. This page is for you if:
If you don't feel ready to proceed, please check our guide to starting with the Atlassian Plugin SDK.
Atlassian applications require Java 1.5 or higher.
Atlassian products provide a plugin system which allows developers to extend or alter the product:
For more information on the plugin framework, see its home page.
Each product exposes a number of plugin modules; some defined by the plugin framework (and thus common to all Atlassian products) and some defined by the product itself. (For example, all products support a servlet plugin module, which allows developers to write a JEE servlet and have it hosted by the product when the plugin is installed. Confluence alone provides a macro plugin module, which allows developers to create custom wiki markup/XHTML elements that will be rendered at page display time.) It is also possible to create your own plugin modules.
All plugin modules are listed in the Plugin Module Index, which will give you an idea of what is possible with the builtin plugin modules and direct you to detailed instructions on how to write with them.
It is easy to overlook vulnerabilities in your code if this is the first time you write a plugin. These, in turn, can introduce security vulnerabilities into the product you plug into.
We have created several APIs to be used for securing your plugins. See this AtlasCamp 2010 presentation for advice on how to use these APIs and practices.
You can find information on our Javadoc here.
We've collected a page of best practices for plugin developers. Everybody should know these important tips.
Have a problem you just can't explain? Find some likely solutions here.
After getting acquainted with cross-product development information here, see product-specific information at the respective product development hub:
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