phixjDSL

phixjDSL is a domain-specific language designed to describe data processing workflows within the PhixJ platform. It provides a declarative syntax for defining data sources, transformation steps, and destinations, enabling repeatable and portable pipelines that can be compiled and executed by the PhixJ runtime.

The language emphasizes safety, determinism, and composability. Pipelines are built from modular components such as sources, transforms, and sinks, which can be parameterized and composed to form complex data flows. phixjDSL supports typing, error handling, and simple scheduling, helping to ensure predictable behavior and easier maintenance. It is designed to be embeddable in host environments that expose JavaScript-based APIs, allowing integration with common data stores, message buses, and HTTP services.

Core concepts include sources (data inputs), transforms (data processing steps), sinks (outputs), and pipelines (the overall flow). Users can express filtering, mapping, and aggregation operations, as well as conditional branching and error handling. The language aims for readability and portability across environments, with a focus on clear separation between configuration and runtime concerns.

Example:

pipeline "tempProcessing" {

source "sensorA" from "mqtt://broker.local/sensors/temp"

transform "toCelsius" using map { celsius = (value - 32) * 5/9 }

filter { celsius > 0 }

sink "db" to "timeseries" table "sensor_readings"

}

Tools and ecosystem: phixjDSL is accompanied by a compiler or interpreter that emits an intermediate representation for the PhixJ runtime, along with basic linting and validation tools. It supports host function bindings for external services and can be used within Node.js projects. Limitations include a developing ecosystem and learning curve for new users.