{
  "id": 17623267,
  "title": "Building a Waitlist with Automatic Promotion in Spring Boot (and Keeping the Queue Gap-Free)",
  "url": "https://urgent.news/2026/11/01/building-a-waitlist-with-automatic-promotion-in-spring-boot-and",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-11-01T15:15:51.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/joao_abreu/building-a-waitlist-with-automatic-promotion-in-spring-boot-and-keeping-the-queue-gap-free-3fk"
  },
  "original_language": "en",
  "account": "The challenge lies in sessions that have a limited number of spots. In the tutoring management system built using Java, Spring Boot, and PostgreSQL, students can become tutors for a subject and open sessions with a limited number of spots. This led to the question of what happens when a session is full. The reporter wanted an optional waitlist feature, which allows students to be added to a queue if there are no spots available. The first student in line gets promoted automatically when a confirmed student cancels, and the queue is renumbered without any gaps.",
  "summary": "🇺🇸 English version (🇧🇷 versão em português logo abaixo) The problem: sessions with limited spots I'm building a tutoring management system with Java, Spring Boot and PostgreSQL. Students can become tutors for a subject, and tutors open sessions with a limited number of spots. That raised a real business question: what happens when a session is full? I didn't want to just return \"Session is…",
  "key_points": [
    "Java, Spring Boot, and PostgreSQL used for tutoring management system",
    "Waitlist feature implemented for sessions with limited spots",
    "Automatic promotion and renumbering of queue without gaps"
  ],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}