JSR-223 Scripting Integration

JSR-223 (Java Specification Request 223) is a specification for the Scripting API for the Java platform. It enables integration of scripting languages into Java applications and offers the following advantages:

Language Independence

Uniform API for various scripting languages (JavaScript, Python, Ruby, Groovy, etc.)

Dynamic Execution

Scripts can be loaded and executed at runtime

Bidirectional Access

Java code can access script objects and vice versa

Standardized Integration

Part of the Java standard since Java 6

Template engines with JSR-223 support can be integrated into various Java applications through this interface without requiring specific adapters. This allows for more flexible integration across different frameworks and use cases.

1. Java Frameworks Supporting JSR-223

1.1. Template Engines

  • FreeMarker - A powerful template engine with MVC pattern focus

  • Velocity - An established Java-based template engine

  • Groovy Templates - Template functionality based on the Groovy scripting language

1.2. Scripting Languages

  • Nashorn - JavaScript engine included in Java (deprecated since Java 11)

  • GraalVM JavaScript - Modern JavaScript implementation for Java

  • Groovy - Dynamic language for the Java platform with scripting capabilities

  • Jython - Python implementation for Java

  • JRuby - Ruby implementation for Java

  • Kotlin Scripting - Script capability for the Kotlin language

1.3. Integration Frameworks

  • Apache Camel - Integration framework with JSR-223 component

  • Spring Framework - Support for JSR-223 in Spring expression language

  • Quarkus - Cloud-native Java framework with GraalVM JavaScript support