A Java 8+ optimized, memory-efficient, and speedy template engine that compiles templates into statically typed Java classes.
Rocker is a Java template engine that compiles HTML templates into statically typed Java classes during the build phase. It solves the problem of slow, reflection-based template engines by generating optimized Java code that runs with minimal memory overhead and no warm-up time.
Java developers building web applications or any system requiring dynamic HTML generation, especially those prioritizing performance, type safety, and seamless integration with existing Java tooling.
Developers choose Rocker for its exceptional speed and memory efficiency due to zero-copy rendering, along with compile-time type safety that catches errors early and integrates naturally with IDEs.
Java 8 optimized, memory efficient, speedy template engine producing statically typed, plain java objects
Open-Awesome is built by the community, for the community. Submit a project, suggest an awesome list, or help improve the catalog on GitHub.
Reuses static byte arrays for template content, drastically reducing memory usage and CPU overhead by avoiding repeated conversions and copies, as highlighted in the performance benchmark.
Compiles templates into Java classes, enabling IDE support, compile-time checks, and easy debugging without runtime reflection, ensuring type safety from the start.
Offers two flavors of hot reloading during development, allowing rapid iteration without JVM restarts, though it requires additional setup with the rocker-compiler dependency.
Seamlessly works with popular Java frameworks like Ninja, Jooby, Spark, and Micronaut, providing ready-to-use bindings for easier adoption in existing projects.
Requires integration with Maven or Gradle plugins for template compilation, adding complexity to the build configuration compared to simpler, runtime-only engines.
Uses a tagless syntax with Java expressions, which may be unfamiliar to developers accustomed to HTML-like templating languages, potentially slowing initial adoption.
Hot reloading's flavor two sacrifices compile-time type safety and incurs a performance penalty for dynamic interface support, as admitted in the README.