Getting Started with Janino: Tips, Tricks, and Best Practices

// key = hash(source + signature) if (cache.contains(key)) return cache.get(key); compile source -> compiled; cache.put(key, compiled); return compiled; 

Janino is a pragmatic tool for embedding Java compilation into applications where speed, low overhead, and dynamic execution are required. When used with careful sandboxing, caching, and clear error handling, it enables powerful runtime extensibility without the cost of external compilation processes.