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WebSphere Liberty: What's New in Version 23.0.0.4 and How to Download It


Download Was Liberty: How to Install and Use IBM WebSphere Liberty




If you are looking for a fast, flexible, and developer-friendly Java EE application server, you might want to consider IBM WebSphere Liberty. In this article, we will explain what WebSphere Liberty is, why you should choose it, how to download it, how to install it, and how to use it. By the end of this article, you will have a clear understanding of how to get started with WebSphere Liberty and how to leverage its features and capabilities.




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What is WebSphere Liberty?




WebSphere Liberty is a lightweight and modular Java EE application server that supports a variety of web-based applications, microservices, and cloud-native applications. It is based on open standards and provides a flexible and extensible platform for developing, deploying, and managing applications.


A lightweight and flexible Java EE application server




WebSphere Liberty is designed to be fast, agile, and efficient. It has a fast startup time and a low memory footprint, which makes it ideal for development, testing, and production environments. It also has a dynamic feature loading mechanism that allows it to load only the features that are required by the applications, which reduces the server size and improves performance. WebSphere Liberty supports multiple Java versions (Java SE 8, 11, 17) and Java EE standards (Java EE 7, 8), as well as Jakarta EE 9. It also supports various web frameworks, such as Spring Boot, MicroProfile, Open Liberty, etc.


A modular and extensible platform for microservices and cloud-native applications




WebSphere Liberty is built on a modular architecture that enables it to run on different platforms and environments, such as Windows, Linux, MacOS, AIX, z/OS, Docker, Kubernetes, IBM Cloud Private, etc. It also supports various deployment models, such as standalone servers, clusters, collectives, etc. WebSphere Liberty provides a rich set of features and APIs that enable developers to create microservices and cloud-native applications that are scalable, resilient, secure, and portable. Some of these features include:


  • Admin Center: A web-based user interface that allows administrators to configure and manage WebSphere Liberty servers and clusters.



  • Collective Controller: A feature that enables the creation and management of collectives, which are groups of WebSphere Liberty servers that can be managed as a single entity.



  • MicroProfile: A set of specifications that define a standard for developing microservices with Java EE technologies.



  • Open Liberty: An open source version of WebSphere Liberty that provides the same core features and capabilities.



  • Security: A feature that provides various security mechanisms, such as authentication, authorization, encryption, SSL, etc.



Why choose WebSphere Liberty?




WebSphere Liberty is a powerful and versatile Java EE application server that offers many benefits for developers and administrators. Here are some of the reasons why you should choose WebSphere Liberty:


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Benefits of WebSphere Liberty




Fast startup and low memory footprint




WebSphere Liberty has a fast startup time of less than 2 seconds and a low memory footprint of less than 100 MB. This means that you can start and stop your servers quickly and easily, and run more instances of WebSphere Liberty on the same hardware. This also improves the responsiveness and availability of your applications, as well as the efficiency and productivity of your development and testing cycles.


Dynamic feature loading and configuration




WebSphere Liberty has a dynamic feature loading mechanism that allows it to load only the features that are required by the applications, which reduces the server size and improves performance. You can also add or remove features dynamically without restarting the server, which simplifies the configuration and maintenance of your servers. WebSphere Liberty uses an XML-based configuration file (server.xml) that allows you to specify the features, properties, and resources for your server. You can also use variables, overrides, and includes to customize your configuration for different environments.


Developer-friendly tools and APIs




WebSphere Liberty provides a rich set of tools and APIs that enable developers to create, test, debug, and deploy applications on WebSphere Liberty. Some of these tools and APIs include:


  • wlp/bin: A command-line interface that allows you to perform various tasks on your WebSphere Liberty servers, such as starting, stopping, installing features, creating servers, etc.



  • Admin Center: A web-based user interface that allows you to configure and manage your WebSphere Liberty servers and clusters.



  • Eclipse IDE plugin: A plugin that integrates WebSphere Liberty with Eclipse IDE, which allows you to create, run, debug, and deploy applications on WebSphere Liberty from within Eclipse.



  • Maven or Gradle dependency: A dependency that allows you to use Maven or Gradle to build and deploy applications on WebSphere Liberty.



  • Docker or Podman container: A container that allows you to run WebSphere Liberty as a Docker or Podman image, which simplifies the deployment and portability of your applications.



  • MicroProfile: A set of specifications that define a standard for developing microservices with Java EE technologies.



  • Open Liberty: An open source version of WebSphere Liberty that provides the same core features and capabilities.



Support for multiple Java versions and standards




WebSphere Liberty supports multiple Java versions (Java SE 8, 11, 17) and Java EE standards (Java EE 7, 8), as well as Jakarta EE 9. This means that you can run applications that use different Java versions and standards on the same WebSphere Liberty server. This also gives you the flexibility to choose the Java version and standard that best suits your needs and preferences. You can also migrate your applications from older Java versions and standards to newer ones with minimal changes.


Comparison with WebSphere Application Server traditional




If you are familiar with WebSphere Application Server traditional (WAS), you might wonder how WebSphere Liberty compares with it. Here are some of the similarities and differences between them:


Similarities and differences




AspectWebSphere Application Server traditionalWebSphere Liberty


TypeA full-profile Java EE application serverA lightweight and modular


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