Articles

Spring Tips: Apache RocketMQ

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Hi, Spring fans! In this installment of Spring Tips, we’re going to look at Alibaba’s Apache RocketMQ. We’ve talked some about Alibaba in Spring Tips before. Check out the earlier Spring Tips installment in which we explore some of Spring Cloud Alibaba.

Running Apache RocketMQ

In order to use Apache RocketMQ, you’ll need to follow the steps in the RocketMQ quickstart. This Spring Tips installment introduces Apache RocketMQ, originally a technology developed and used internally at Alibaba and proven in the forge of 11/11, the famous Chinese sales holiday, sort of like “Cyber Monday,” or “Black Friday,” in the US. Sort of like that, but waaaaaay bigger. In 2019, Alibaba (alone, with no other e-commerce engines involved), made almost $40 billion USD in 24 hours. This required that trillions of messages be sent through something that could scale to meet the demand. RocketMQ is the only thing they could trust.

Source de l’article sur DZONE

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A Simple HTTP Server in Java

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Do you want to implement an HTTP server, but do you not want to take any risk of writing a full-fledged HTTP server? Developing an HTTP server with full capability is not a trivial task. But Java has got a solution to this kind of problem. Java supports an in-built HTTP server. By just writing 100 lines of code, we can develop a somewhat-decent HTTP server that can handle HTT$$anonymous$$ET and POST requests. We can also leverage it to handle other HTTP commands as well.

HTTPServer class

Java SDK provides an in-built server called HttpServer. This class belongs to com.sun.net   package. 

Source de l’article sur DZONE

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All Things Java 8 [Tutorials]

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Java 8
No matter what version of the JDK we are on, Java 8 is not going anywhere.

Java 8 introduced a new era of Java. Everything from lambda expressions and functional programming to Streams and collections — DZone was there to document it all.

So whether you’re migrating over to Java 9 or Java 11, or maybe even Java 13, Java 8 concepts and features are still very much alive in the JDK. And understanding these core concepts can help tremendously when it’s time to move beyond Java 8.

Source de l’article sur DZONE

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