How to Download and Use the Eclipse Liberty Plugin
If you are a Java developer looking for a fast and easy way to create cloud-native applications with Open Liberty or WebSphere Liberty, you might want to try the Eclipse Liberty plugin. This plugin provides a rich set of features for developing, testing, and deploying applications with Liberty servers in the Eclipse IDE.
In this article, you will learn what the Eclipse Liberty plugin is, why you should use it, and how to download, install, and use it in your Eclipse environment. You will also learn how to configure your Liberty server, run your application in dev mode, and use MicroProfile and Jakarta EE APIs with code assistance.
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What is Eclipse Liberty Plugin and Why Use It
The Eclipse Liberty plugin is an extension for the Eclipse IDE that allows you to work with Open Liberty and WebSphere Liberty servers. Open Liberty is an open source application server that supports MicroProfile and Jakarta EE standards, while WebSphere Liberty is a commercial version that offers additional features and support from IBM.
With the Eclipse Liberty plugin, you can:
Create and manage Liberty servers in the Eclipse Servers view
Start and stop your application in dev mode, which automatically detects and applies code changes without restarting the server
Run tests and view test reports in the Liberty Dashboard
Edit your server configuration files with auto-complete, validation, and hover-over descriptions
Develop applications with MicroProfile and Jakarta EE APIs with code blocks, auto-complete, and real-time syntax validation
The Eclipse Liberty plugin is designed to make your development process faster, easier, and more productive. You can focus on writing your code while the plugin takes care of the server configuration, deployment, testing, and debugging.
Prerequisites
Before you can use the Eclipse Liberty plugin, you need to have the following prerequisites installed on your machine:
A Java Development Kit (JDK) version 8 or higher. You can download it from .
An Eclipse IDE version 2020-09 (4.17) or higher. You can download it from .
A Liberty profile version 8.5.5.6 or higher. You can download it from .
How to Download and Install Eclipse Liberty Plugin
There are two ways to download and install the Eclipse Liberty plugin: using the Eclipse Marketplace or using the External Install Button.
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Using Eclipse Marketplace
The Eclipse Marketplace is a convenient way to find and install plugins for your Eclipse IDE. To install the Eclipse Liberty plugin using the Eclipse Marketplace:
Open your Eclipse IDE and go to Help > Eclipse Marketplace.
Type "Liberty" in the search box and hit Enter.
In the result list, find "IBM Liberty Developer Tools" or "Liberty Tools" (the latter is an early release of the next-generation tools).
Click the Install button to start the installation.
Follow the instructions on the screen to complete the installation.
Restart your Eclipse IDE when prompted.
Using External Install Button
The External Install Button is a drag-and-drop feature that allows you to install plugins from external websites. To install the Eclipse Liberty plugin using the External Install Button:The External Install Button is a drag-and-drop feature that allows you to install plugins from external websites. To install the Eclipse Liberty plugin using the External Install Button:
Go to and find the "IBM Liberty Developer Tools" or "Liberty Tools" section.
Drag the Install button to your Eclipse IDE and drop it on the toolbar or the main window.
A dialog box will appear asking you to confirm the installation.
Click OK to start the installation.
Follow the instructions on the screen to complete the installation.
Restart your Eclipse IDE when prompted.
How to Create and Run a Liberty Server in Eclipse
Once you have installed the Eclipse Liberty plugin, you can create and run a Liberty server in your Eclipse IDE. There are two ways to do this: using the Liberty Dashboard or using the New Server Wizard.
Using Liberty Dashboard
The Liberty Dashboard is a view that shows all your Liberty servers and applications in one place. You can use it to create, start, stop, and manage your Liberty servers and applications. To use the Liberty Dashboard:
Open your Eclipse IDE and go to Window > Show View > Other.
Type "Liberty" in the search box and select "Liberty Dashboard".
Click Open to open the Liberty Dashboard view.
In the Liberty Dashboard view, click the New Server button to create a new Liberty server.
A dialog box will appear asking you to select a server type and a runtime environment.
Select "WebSphere Application Server Liberty" as the server type and browse to your Liberty profile installation directory as the runtime environment.
Click Next to continue.
A dialog box will appear asking you to name your server and select a configuration template.
Type a name for your server and select a configuration template that suits your needs. You can choose from default, webProfile, javaee, microProfile, or custom templates.
Click Finish to create your server.
Your new server will appear in the Liberty Dashboard view. You can right-click on it and select Start, Stop, Restart, or Delete actions.
Using New Server Wizard
The New Server Wizard is a tool that allows you to create a new server in the Eclipse Servers view. You can use it to create a Liberty server with more options and settings. To use the New Server Wizard:
Open your Eclipse IDE and go to Window > Show View > Servers.
In the Servers view, right-click on an empty area and select New > Server.
A dialog box will appear asking you to select a server type and a runtime environment.
Select "WebSphere Application Server Liberty" as the server type and browse to your Liberty profile installation directory as the runtime environment.
Click Next to continue.
A dialog box will appear asking you to name your server and select a configuration template.
Type a name for your server and select a configuration template that suits your needs. You can choose from default, webProfile, javaee, microProfile, or custom templates.
Click Next to continue.
A dialog box will appear asking you to add or remove projects from your server.
Select the projects that you want to deploy on your server and click Finish to create your server.
Your new server will appear in the Servers view. You can double-click on it to open its overview page, where you can modify its settings and launch modes.
How to Configure and Develop Applications with Eclipse Liberty Plugin
The Eclipse Liberty plugin provides several features that help you configure and develop applications with Liberty servers. You can use the server configuration editor, dev mode, test features, MicroProfile and Jakarta EE support, and more.
Using Server Configuration Editor
The server configuration editor is a tool that allows you to edit your server.xml file with auto-complete, validation, and hover-over descriptions. You can use it to modify your server settings, features, variables, SSL certificates, data sources, logging levels, etc. To use the server configuration editor:
In your Eclipse IDE, go to either the Liberty Dashboard view or the Servers view and select your Liberty server.
Right-click on your server and select Open Server Configuration File (server.xml).
The server.xml file will open in the editor. You can edit it as you wish with syntax highlighting, auto-complete, validation, and hover-over descriptions for each element and attribute. You can also use the Design tab to view and edit your server configuration in a graphical way.
When you are done editing, save your file and restart your server to apply the changes.
Using Dev Mode and Test Features
Dev mode is a feature that allows you to start and run your application in development mode, which automatically detects and applies code changes without restarting the server. You can also run tests and view test reports in the Liberty Dashboard. To use dev mode and test features:
In your Eclipse IDE, go to either the Liberty Dashboard view or the Servers view and select your Liberty server.
Right-click on your server and select Run As > Run on Server.
A dialog box will appear asking you to select a launch mode. Select Development Mode and click OK.
Your server will start in dev mode and your application will be deployed on it. You can see the output in the Console view.
Now you can make changes to your code and see them reflected in your application without restarting the server. You can also add or remove features from your server.xml file and they will be installed or uninstalled automatically.
To run tests, go to the Liberty Dashboard view and click the Test button. A dialog box will appear asking you to select a test type. You can choose from Unit Test, Integration Test, or All Tests.
Click OK to run the tests. The test results will be displayed in the Liberty Dashboard view. You can see the number of tests passed, failed, or skipped, as well as the test duration and coverage.
You can also click on each test result to see more details, such as the test name, class, method, message, stack trace, etc.
Using MicroProfile and Jakarta EE Support
The Eclipse Liberty plugin provides support for developing applications with MicroProfile and Jakarta EE APIs. MicroProfile is a set of specifications that define a standard for building cloud-native applications with Java EE technologies, while Jakarta EE is the successor of Java EE that provides a platform for enterprise applications. With the Eclipse Liberty plugin, you can:
Create a MicroProfile or Jakarta EE project using a wizard that guides you through the steps.
Add or remove MicroProfile or Jakarta EE features from your server.xml file with auto-complete and validation.
Use code blocks to insert snippets of code for common tasks, such as creating a REST endpoint, injecting a bean, or adding a metric.
Use auto-complete and real-time syntax validation for MicroProfile and Jakarta EE annotations and APIs.
Use hover-over descriptions to see the documentation for each annotation and API.
Conclusion
The Eclipse Liberty plugin is a powerful tool that helps you create, run, test, and deploy applications with Open Liberty or WebSphere Liberty servers in the Eclipse IDE. It offers a rich set of features that make your development process faster, easier, and more productive. You can download and install it from the Eclipse Marketplace or using the External Install Button. You can also use it to configure your server settings, run your application in dev mode, run tests and view test reports, and use MicroProfile and Jakarta EE APIs with code assistance.
If you want to learn more about the Eclipse Liberty plugin, you can visit to get involved in the development and feedback of the project. Happy coding!
FAQs
Q: How do I update the Eclipse Liberty plugin?
A: You can update the Eclipse Liberty plugin using the Eclipse Update Manager. Go to Help > Check for Updates and follow the instructions on the screen.
Q: How do I uninstall the Eclipse Liberty plugin?
A: You can uninstall the Eclipse Liberty plugin using the Eclipse Installation Details dialog. Go to Help > About Eclipse IDE > Installation Details. Select "IBM Liberty Developer Tools" or "Liberty Tools" from the list and click Uninstall.
Q: How do I debug my application with the Eclipse Liberty plugin?
A: You can debug your application with the Eclipse Liberty plugin using the Debug As > Debug on Server option. This will start your server in debug mode and attach a debugger to it. You can then set breakpoints, inspect variables, step through code, etc.
Q: How do I deploy my application to a remote Liberty server with the Eclipse Liberty plugin?A: You can deploy your application to a remote Liberty server with the Eclipse Liberty plugin using the Remote Server Support feature. You need to have a remote server configured in your server.xml file and a secure connection to it. You can then use the Remote Server view to manage your remote server and applications.
Q: How do I use Docker with the Eclipse Liberty plugin?
A: You can use Docker with the Eclipse Liberty plugin using the Docker Tools feature. You need to have Docker installed and running on your machine. You can then use the Docker Explorer view to create, run, stop, and remove Docker containers with Liberty servers and applications.
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