dsntk | ÐecisionToolkit

The DMN™ specification defines functionality that allows calling externally defined functions, including those implemented in Java. More details can be found in the official specification under the chapter "Externally-defined functions". Since ÐecisionToolkit is implemented in Rust, invoking Java functions requires a Remote Procedure Call (RPC) server. This project provides a Java implementation of such an RPC server.

The RPC server for Java can be downloaded from releases, built from source or run in Docker container.

1. Install Java 21.
2. Install Maven.
3. Clone this repository.
4. Build the server:

mvn package

The server-1.0.0.jar can be found in ./target directory

java -jar server-1.0.0.jar

Docker container can be built and run using prepared script file:

./scripts/container.sh

After building, the new container is started and ready to accept requests. Try:

curl http://127.0.0.1:22023/api/rest/v1/system/info

The output should look like this:

{"data":{"name":"Java RPC server for ÐecisionToolkit","version":"1.0.0"}}

To get a pretty-printed JSON, try:

curl -s http://127.0.0.1:22023/api/rest/v1/system/info | jq

Expected output:

{
  "data": {
    "name": "Java RPC server for ÐecisionToolkit",
    "version": "1.0.0"
  }
}

• GET http://127.0.0.1:22023/api/rest/v1/system/info

  Utility endpoint for verifying connectivity with the running server.

• POST http://127.0.0.1:22023/api/rest/v1/rpc/evaluate

  Endpoint directly used by ÐecisionToolkit to evaluate Java functions in compliance with the DMN™ specification.

Licensed under either of

• MIT license (see LICENSE-MIT) or
• Apache License, Version 2.0 (see LICENSE and NOTICE)

at your option.

Any contributions to dsntk-java-server are greatly appreciated. All contributions intentionally submitted for inclusion in the work by you, shall be dual licensed as above, without any additional terms or conditions.