70 lines
1.7 KiB
TypeScript
70 lines
1.7 KiB
TypeScript
import * as plugins from './taskbuffer.plugins.js';
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import { Task } from './taskbuffer.classes.task.js';
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import { logger } from './taskbuffer.logging.js';
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export class TaskRunner {
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public maxParallelJobs: number = 1;
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public status: 'stopped' | 'running' = 'stopped';
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public runningTasks: plugins.lik.ObjectMap<Task> =
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new plugins.lik.ObjectMap<Task>();
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public queuedTasks: Task[] = [];
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constructor() {
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this.runningTasks.eventSubject.subscribe(async (eventArg) => {
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this.checkExecution();
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});
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}
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/**
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* adds a task to the queue
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*/
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public addTask(taskArg: Task) {
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this.queuedTasks.push(taskArg);
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this.checkExecution();
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}
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/**
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* set amount of parallel tasks
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* be careful, you might lose dependability of tasks
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*/
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public setMaxParallelJobs(maxParallelJobsArg: number) {
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this.maxParallelJobs = maxParallelJobsArg;
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}
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/**
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* starts the task queue
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*/
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public async start() {
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this.status = 'running';
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}
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/**
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* checks whether execution is on point
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*/
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public async checkExecution() {
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if (
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this.runningTasks.getArray().length < this.maxParallelJobs &&
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this.status === 'running' &&
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this.queuedTasks.length > 0
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) {
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const nextJob = this.queuedTasks.shift();
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this.runningTasks.add(nextJob);
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try {
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await nextJob.trigger();
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} catch (err) {
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logger.log('error', `TaskRunner: task "${nextJob.name || 'unnamed'}" failed: ${err instanceof Error ? err.message : String(err)}`);
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}
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this.runningTasks.remove(nextJob);
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this.checkExecution();
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}
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}
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/**
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* stops the task queue
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*/
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public async stop() {
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this.status = 'stopped';
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}
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}
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