为Android应用开发服务端实时用户在线状态检测器

Hey Joshua, let's walk through each option and figure out which fits your game's needs best—since you're focused on real-time user visibility, chat/question interactions, and no persistent state (no chat logs, no stored online status), each tool has clear pros and cons:

1. ejabberd #

• Why it fits: Built on XMPP, it's designed for real-time communication and online presence out of the box. The best part? You can fully configure it to avoid any data persistence—disable message archiving, turn off database storage for online status, and set sessions to vanish when users disconnect. It’s lightweight, handles concurrent users well, and scales nicely if your game grows.
• Catch: You’ll need to manage your own server, so there’s a small learning curve if you’re new to XMPP server admin. But the documentation is solid, and you can get a minimal, stateless setup up quickly.

2. OpenFire #

• Why it fits: Another XMPP-based server, but with a super intuitive web admin panel that makes setup a breeze. Like ejabberd, you can disable all persistent storage for chats and online status to match your stateless requirement. It’s great for small to mid-sized user bases and has a strong community for troubleshooting.
• Catch: Performance can lag a bit under heavy high-concurrency loads compared to ejabberd. If you expect massive numbers of simultaneous users, you might need extra optimization work down the line.

3. FCM (formerly GCM) #

• Why it doesn’t fit well: FCM is a push notification service, not a dedicated real-time communication framework. To build online user lists and bidirectional chat, you’d need a separate backend to track presence—but you explicitly don’t want to store that state. Even if you work around it, FCM has variable message latency, which hurts real-time interaction quality. Plus, building peer-to-peer chat via FCM requires clunky client-side logic that’s way more complex than using a purpose-built IM server.

Final Recommendation #

If you’re okay managing your own server, ejabberd is your best bet—it’s performant, highly configurable, and checks all your stateless boxes perfectly. If you want something easier to set up and manage without deep server admin knowledge, go with OpenFire. Skip FCM entirely here—it’s not built for what you’re trying to do, and you’ll end up fighting against its core design.

内容的提问来源于stack exchange，提问作者Joshua Majebi