84 lines
3.4 KiB
Markdown
84 lines
3.4 KiB
Markdown
## toad-java
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This repo contains the Java & Scala APIs for the [toad](https://github.com/toad-lib/toad) CoAP network runtime.
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### Developing
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#### Developing - Clone
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```sh
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> git clone git@github.com:toad-lib/toad-java toad-java
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> cd toad-java
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```
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#### Developing - Tooling
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##### Developing - Tooling - System
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If on a minimal os (ex. bare debian image) install if not present:
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- a C compiler, examples:
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- [debian `apt install gcc`](https://packages.debian.org/stable/devel/gcc)
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- [macos `brew install gcc`](https://formulae.brew.sh/formula/gcc)
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- [macos - xcode commandline tools](https://developer.apple.com/xcode/resources/)
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- openssl, examples:
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- [debian `apt install libssl-dev`](https://packages.debian.org/stable/devel/gcc)
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- [macos `brew install openssl`](https://formulae.brew.sh/formula/gcc)
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- (debian only) `apt install pkg-config`
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##### Developing - Tooling - asdf
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this repo is configured to use asdf for managing versions of rust, the JVM, and coursier
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used by this project.
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To use it follow the [asdf installation guide](https://asdf-vm.com/guide/getting-started.html#official-download)
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then run the following in bash or zsh in the directory you cloned the repo to:
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```sh
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> asdf install
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> asdf plugin add java # skip if you have system install of JDK version 20
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> asdf plugin add rust # skip if you have system install of Rust
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> asdf plugin add coursier # skip if you have system install of coursier
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```
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##### Developing - Tooling - Non-asdf
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NOTE: skip this section if you are using asdf for tooling version management.
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- install [openjdk](https://jdk.java.net/20/) _or equivalent_ version 20 or higher
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- after installing, ensure that `$JAVA_HOME` correctly refers to JDK 20 (`java -version` should output `openjdk version "20" 202x-xx-xx`)
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- install [coursier](https://get-coursier.io/docs/cli-install)
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- install [rust](https://rustup.rs)
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##### Developing - Tooling - sbt
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After following the above steps, add coursier-installed binaries to your PATH, ex with:
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```sh
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> echo 'export PATH=$PATH:/root/.local/share/coursier/bin' >> ~/.zshrc
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```
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Then install `sbt`
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```sh
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> coursier install sbt
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```
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#### Developing - Rust
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There is a non-trivial amount of code necessary to support the interop between
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`toad` (a rust library) and `toad-java` (a java project).
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There is a published library [`toad-jni`](https://github.com/toad-lib/toad/tree/main/toad-jni) which contains
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general abstractions that are useful for this project and may be useful to others.
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Separately is a rust project in this repository, `./glue/`.
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This is *not* a published crate and is instead source code for a
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shared library specifically to implement native java methods in this java project.
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Development tips specific to the glue lib can be found in `./glue/README.md`.
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#### Developing - Build
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the sbt command `compile` (`sbt compile` or `compile` in the `sbt` shell)
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is the only required build step for this project.
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`sbt compile` can be broken into the following steps:
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1. run `javac` to generate C headers for java files with `native` function requirements
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1. dump the headers into `./target/native/debug/`
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- _(dual purpose; a native interface available to manually cross-check against the hard rust implementation, as well as providing an interface to the built library artifact)_
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1. run `cargo build` within `./glue/` (builds to `./target/native/`)
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1. run `cargo test` within `./glue/`
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1. build java & scala sources to `./target/`
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### Tests
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todo
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