<p>Yes -- you can pub/sub to clients, but those still have to be <em>Redis</em> clients that <em>also know about pub/sub</em>.  Per your account handle, you probably need to look for a simple-but-sufficient Java library.</p>
<p>I wrote about a simple application I create for my own use:  a listener process fetches market data (for less than a handful of contracts) and <em>publishes</em> them to Redis from where clients (in a different process and/or on a different machine) can subscribe.  Works <em>great</em>. I do this in R because I had already written a (C++ based) client for R (around hiredis) to which we then added pub/sub.</p>
<p>The blog post is <a href="https://dirk.eddelbuettel.com/blog/2022/02/23/#036_pub_sub_for_market_monitoring_with_r_and_redis" rel="nofollow noreferrer">here</a>, and I also wrote about Redis for market monitoring in this <a href="https://arxiv.org/abs/2203.08323" rel="nofollow noreferrer">short arXiv paper</a> -- and there is a corresponding <a href="https://arxiv.org/abs/2203.06559" rel="nofollow noreferrer">short arXiv paper introducing Redis</a>.</p>
Publish message from Redis / redis stream to a micro service
<p>I have a scenario like I would be storing details on the redis-database and this would publish messages to external API's.</p>
<p><strong>Question:</strong></p>
<ol>
<li>Is that feasible to publish message from Redis to outside world? - All pub/sub I have seen are within <strong>redis-cli</strong>.</li>
</ol>
<p><a href="https://i.stack.imgur.com/ixiPR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ixiPR.png" alt="enter image description here" /></a></p>