Ristretto ClassLoader

Implementation of a JVM Class Loader that is used to load Java classes. Classes can be loaded from the file system or from a URL; jar and modules are supported. A runtime Java class loader can be created from any version of AWS Corretto. The runtime class loader will download and install the requested version of Corretto and create a class loader that can be used to load Java classes.

The AWS Corretto runtime is installed in the following directory:

• Unix: $HOME/.ristretto/<version>
• Windows: %USERPROFILE%\.ristretto\<version>

Examples

use ristretto_classloader::{ClassLoader, ClassPath, JavaStr, Result};
use std::sync::Arc;

fn main() -> Result<()> {
    fn main() -> Result<()> {
        let (version, class_loader) = runtime::class_loader("21")?;
        let class_name = "java.util.HashMap";
        println!("Loading {class_name} from Java runtime {version}");
        let class = class_loader.load(JavaStr::try_from_str(class_name)?)?;
        println!("{class:?}");
        Ok(())
    }
}

Feature flags

The following features are available: