Apache Geronimo

Apache Geronimo is an open-source project under the Apache Software Foundation that provides a suite of Java EE/Jakarta EE libraries and MicroProfile implementations. Originally known for its fully certified Java EE application server, Geronimo has evolved into a modular platform focused on delivering reusable components and integrations for enterprise Java development. While the traditional Geronimo Application Server is no longer actively maintained, the project continues to support a range of tools and libraries that are widely used and actively developed.

Features

• Java EE/Jakarta EE Libraries: Implements core specifications such as Servlet, JSP, EJB, JPA, and more.
• MicroProfile Implementations: Includes modules for Config, Fault Tolerance (Safeguard), JWT Auth, OpenTracing, Health, Metrics, and OpenAPI.
• OSGi Metadata Support: Provides OSGi bundle metadata for modular deployment.
• Plugin-Based Architecture (XBean): Enables dynamic discovery and installation of server plugins, similar to Eclipse's plugin model.
• Spring Integration: Offers robust support for Spring-based applications.
• Batch Processing (BatchEE): Implements JSR-352 (JBatch) with extensions for integration with technologies like Camel, Jackson, Hazelcast, and Groovy.
• Native Compilation (Arthur): Facilitates GraalVM-based native image generation with Maven plugin support and Docker integration.

Capabilities

• Modular Runtime: Allows developers to build lightweight, customized server runtimes using only the components they need.
• MicroProfile Aggregator: Provides a single dependency setup for a ready-to-use MicroProfile 2.0 server.
• Flexible IoC Support: Compatible with multiple Inversion of Control systems or can run without one.
• Lifecycle and Class Loader Management: Advanced control over application lifecycle and class loading.
• REST and CLI Interfaces: BatchEE includes web UI and REST/CLI interfaces for job management and integration with schedulers.
• GraalVM Integration: Arthur simplifies the process of compiling Java applications into native binaries.

Benefits

• Open Source and Community Driven: Fully open development model with accessible source code, mailing lists, and issue tracking.
• Enterprise Ready: Designed to meet the needs of enterprise developers with support for modern Java standards.
• Customizable and Lightweight: Build only what you need, reducing overhead and improving performance.
• Cloud and Production Friendly: MicroProfile extensions enhance readiness for cloud-native deployments.
• Developer Productivity: Tools like Arthur and BatchEE streamline development and deployment workflows.