Crate scientific_workflow

Expand description

Rust primitives for reproducible scientific workflows.

scientific-workflow provides the data and execution foundations needed to describe scientific systems, record their evolution, and organize scoped computational work. The crate is intentionally divided by responsibility: state representation, in-memory state time series, storage, orchestration, and language bridges remain separate modules rather than accumulating behind one monolithic interface.

§Current modules

configuration provides the standard config/{fixed,sweep,paths}.json project layout, deterministic Cartesian or explicit-case task expansion, complete cheap task-configuration handles, exact sweep-value selection, named path resolution, and byte-exact source export. project combines task configuration with either a project-owned config/state.json schema or a canonical schema supplied by a fixed-model crate as one immutable project::ScientificProject. execution creates collision-resistant or caller-named execution scopes and deterministic task recording paths without taking ownership away from storage writers. artifact atomically publishes and verifies content-addressed immutable bytes while leaving their scientific representation to consumer crates. runtime provides phase-based bounded scheduling and one process-wide human-facing display for registered tasks. Task workloads retain ownership of all scientific I/O. rng_record provides only validated, persisted RNG provenance records; random generation remains an application responsibility.

system_state provides:

JSON-defined, immutable field layouts;
optional natural-language field descriptions without persisted Rust types;
heterogeneous concrete Rust payloads behind a typed API;
clone-free payload insertion, mutation, and extraction;
explicit per-payload cloning of complete states;
mutable, checked time-point progression.

Type erasure and boxing remain internal to that module. Consumer crates work with their original concrete payload types.

time_series provides the in-memory analysis collection for complete, ordered states. It enforces shared-layout identity and increasing simulation indices, offers a lightweight borrowed view, and permits field-level mutation without exposing mutable state time. It deliberately performs no serialization, chunking, or filesystem IO.

storage provides named partial-state streams with writer-owned sampling intervals, borrowed JSON encoding only when due, bounded asynchronous persistence through one worker per recording, byte-targeted chunking, atomic recording metadata, automatic operational timing, terminal summaries, name-selected payload decoders, and verified full-series or latest-state reconstruction. Import prelude::basics for these scientific primitives and prelude::runtime only at orchestration boundaries.

§Basic use

use scientific_workflow::prelude::basics::*;

let spec = SystemStateSchema::load_json_template("state.json")?;
let mut state = spec.create_empty_state(SimulationTime::from_iteration(0));

assert!(
    state
        .insert_payload("population", vec![10_u64, 20, 30])?
        .is_none()
);
state
    .payload_mut::<Vec<u64>>("population")?
    .push(40);
let time = state.advance_simulation_time(None)?;
assert_eq!(time.iteration(), 1);
let population = state.take_payload::<Vec<u64>>("population")?;

assert_eq!(population, vec![10, 20, 30, 40]);

Future orchestration-layer features will organize scoped workflow execution without changing the public state-value ownership or storage contracts.

Modules§

artifact: Generic content-addressed input artifacts inside an execution scope.
configuration: Standard JSON configuration for scientific projects and parameter sweeps.
execution: Execution scope management for scientific workflows.
prelude: Narrow end-user imports grouped by responsibility.
project: Conventional immutable definition of one scientific project.
rng_record: Lightweight provenance records for application-owned random number generators.
runtime: Phase-based scheduling and centralized runtime display.
storage: Recording persistence and reconstruction for scientific state samples.
system_state: Template-defined, heterogeneous scientific system states.
time_series: In-memory collections of ordered scientific system states.