Question 1

How do I use Apache Fory for cross-language serialization between Java and Python?

Accepted Answer

Set both languages to XLANG mode, register types with consistent IDs or names (e.g., fory.register(Person.class, 1) in Java and fory.register::<Person>(1) in Rust), and use only cross-language compatible types. See the cross-language guide for examples with circular references.

Question 2

Is Apache Fory faster than Protocol Buffers or Avro?

Accepted Answer

Yes, benchmarks show Apache Fory can be up to 170x faster due to JIT compilation and zero-copy techniques. However, Protocol Buffers and Avro offer more mature ecosystems and guaranteed binary compatibility, which Fory lacks between major versions.

Question 3

How to handle schema evolution with Apache Fory?

Accepted Answer

Enable compatible mode using withCompatibleMode(CompatibleMode.COMPATIBLE) in Java or compatible=True in Python to support forward/backward compatibility. This allows independent field changes without coordinated service upgrades, though it adds slight serialization overhead.

Question 4

Can Apache Fory replace pickle in Python for better security?

Accepted Answer

Yes, Python native mode offers a high-performance, secure alternative with whitelist-based class registration by default. However, it requires explicit type registration and doesn't support all Python dynamic features out-of-the-box.

Question 5

How to install Apache Fory for a Rust project?

Accepted Answer

Add 'fory = "0.16"' to your Cargo.toml, use the #[derive(ForyObject)] macro on structs, and register them with IDs for cross-language use. Reuse the Fory instance across serializations for optimal performance, as noted in the Rust guide.

Question 6

What's the performance trade-off between native and xlang mode in Apache Fory?

Accepted Answer

Native mode is optimized for single-language use with no cross-language metadata, offering peak performance. Xlang mode adds overhead for compatibility and restricts types, so always prefer native mode when cross-language exchange isn't needed.

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