taskbuffer/ts/taskbuffer.classes.taskrunner.ts

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import * as plugins from './taskbuffer.plugins';
import { Task } from './taskbuffer.classes.task';
export class TaskRunner {
public maxParrallelJobs: number = 1;
public status: 'stopped' | 'running' = 'stopped';
public runningTasks: plugins.lik.Objectmap<Task> = new plugins.lik.Objectmap<Task>();
public qeuedTasks: Task[] = [];
constructor() {
this.runningTasks.eventSubject.subscribe(async eventArg => {
this.checkExecution();
});
}
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/**
* adds a task to the qeue
*/
public addTask(taskArg: Task) {
this.qeuedTasks.push(taskArg);
this.checkExecution();
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}
/**
* set amount of parallel tasks
* be careful, you might loose dependability of tasks
*/
public setMaxParallelJobs(maxParrallelJobsArg: number) {
this.maxParrallelJobs = maxParrallelJobsArg;
}
/**
* starts the task queue
*/
public start() {
this.status = 'running';
}
/**
* checks wether execution is on point
*/
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public async checkExecution() {
if (
this.runningTasks.getArray().length < this.maxParrallelJobs &&
this.status === 'running' &&
this.qeuedTasks.length > 0
) {
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const nextJob = this.qeuedTasks.shift();
this.runningTasks.add(nextJob);
await nextJob.trigger();
this.runningTasks.remove(nextJob);
this.checkExecution();
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}
}
/**
* stops the task queue
*/
public stop() {
this.status = 'stopped';
}
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}