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Introduce the Publish/Subscribe pattern to provide a flexible event-handling system.
The Publish/Subscribe pattern is a messaging paradigm used in software architecture with several key points:
* De…
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### Describe what you want
Like the LISTEN/NOTIFY function in postgres
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I have to following problem: During an implementation of "lock" function, I am using subscribe/unsubscribe/publish method, not to pull continuously the state of the lock.
What I experience, that I re…
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### Is there an existing issue for the same feature request?
- [X] I have checked the existing issues.
### Is your feature request related to a problem?
_No response_
### Describe the feature you'…
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I can't get en event to fire when a client subscribe a topic but only when on that topic a message is received. Like if on('subscribe') acts more like on ('publish'). Is there an event that fires just…
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This stuff is pretty important part of Redis, people will have difficulties adopting your technology if migrating from Redis to SSDB involves giving up features.
You went so far doing a great job wit…
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### What happened?
We have an emqx cluster, the version is Version:5.0.20.
Deployed in two data centers, each with 3 core nodes + 8 repl nodes.
This cluster has been running stably for more than…
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## Bug report
**Required Info:**
- Operating System:
- Ubuntu 22.04
- Installation type:
- ros2-humble from binaries
- Version or commit hash:
- N/A
- DDS implementation:
- De…
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This has been tested on both, a local and remote system setting, with ROS2 Humble.
**Occasionally**, the publisher's frequency of publishing images will drop from 30FPS to ~15FPS and lower dependi…