Project Panama Unleashing Native Libraries
summary
Project Panama lets Java call native libraries without handwritten JNI wrappers by providing FFI and Memory Access APIs that describe native layouts (structs, unions, sequences), manage off‑heap memory with arenas/segments, and create downcall/upcall method handles. The JExtract generator (requires clang) emits bindings and static initializers automatically (Jextract (requires clang)). JDK22 ships the APIs (JExtract remains EA); simple primitive calls match JNI performance, complex by‑value structs cost more. JDK22 GA, JExtract EA
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chapters (15)
- 0:00Introduction
- 1:46Why Project Panama
- 8:49JNI drawbacks
- 15:15Project Panama components
- 16:38Foreign memory access
- 29:21Memory layouts
- 36:12Memory access handles
- 39:42Foreign function support
- 50:02JExtract tool
- 55:11Performance comparison
- 57:21Trivial linker option
- 58:03C++ and Project Panama
- 1:00:14JNI alternatives
- 1:02:03Project history
- 1:03:27Q&A and resources
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