ability to start jobs individually

lib/services/jobs/run-state.js

@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2025 by Christian Kellner.
+ * Licensed under Apache-2.0 with Commons Clause and Attribution/Naming Clause
+ */
+
+/**
+ * Simple in-memory running state registry for jobs.
+ * Prevents concurrent execution of the same job within a single process.
+ * This registry is reset on process restart.
+ * @type {Set<string>}
+ */
+const running = new Set();
+
+/**
+ * Check if a job is currently marked as running.
+ * @param {string} jobId
+ * @returns {boolean}
+ */
+export function isRunning(jobId) {
+  return running.has(jobId);
+}
+
+/**
+ * Try to mark a job as running.
+ * If it was already running, returns false and does not modify the set.
+ * @param {string} jobId
+ * @returns {boolean} true if the job was successfully marked as running
+ */
+export function markRunning(jobId) {
+  if (running.has(jobId)) return false;
+  running.add(jobId);
+  return true;
+}
+
+/**
+ * Mark a job as finished (remove from the running registry).
+ * @param {string} jobId
+ * @returns {void}
+ */
+export function markFinished(jobId) {
+  running.delete(jobId);
+}
+
+/**
+ * Retrieve all currently running job IDs.
+ * @returns {string[]}
+ */
+export function getRunningJobIds() {
+  return Array.from(running);
+}