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The Ultimate Guide to Java Virtual Threads

Rock the JVM

Riccardo is a proud alumnus of Rock the JVM, now a senior engineer working on critical systems written in Java, Scala and Kotlin. Version 19 of Java came at the end of 2022, bringing us a lot of exciting stuff. First, we need to use a version of Java that is at least 19. Another tour de force by Riccardo Cardin. getLogger ( App.

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Java Tutorial For Beginners

U-Next

Java-enabled general-purpose computers, mobile devices, and other handheld gadgets are a part of everyone’s daily life now. As a result, we can see that Java is one of the most widely used programming languages today. Therefore, our Java for beginners tutorial is here to educate the audience en masse. . Advantages of Java .

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A guide to UDP in Scala with FS2

Rock the JVM

The UDP header is fixed at 8 bytes and contains a source port, destination port, the checksum used to verify packet integrity by the receiving device, and the length of the packet which equates to the sum of the payload and header. flip () println ( s "[server] I've received ${content.limit()} bytes " + s "from ${clientAddress.toString()}!

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Seeing through hardware counters: a journey to threefold performance increase

Netflix Tech

We decided to move one of our Java microservices?—?let’s We turned to JVM-specific profiling, starting with the basic hotspot stats, and then switching to more detailed JFR (Java Flight Recorder) captures to compare the distribution of the events. The problem It started off as a routine migration. let’s call it GS2?—?to

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Two-Factor Authentication in Scala with Http4s

Rock the JVM

HMAC-based One Time Password (HOTP) The H in HOTP stands for HMAC (Hash-based Message Authentication Code). HOTP scala implementation HOTP generation is quite tedious, therefore for simplicity, we will use a java library, otp-java by Bastiaan Jansen. We can now use hotp to generate the code. val ZxingVersion = "3.5.1"

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Patching the PostgreSQL JDBC Driver

Zalando Engineering

Postgres Logical Replication at Zalando Builders at Zalando have access to a low-code solution that allows them to declare event streams that source from Postgres databases. In our case with a Java application as the end-consumer, the first port-of-call for messages from Postgres was PgJDBC, the Java Driver for Postgres.

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What is an Array? - Introduction with Examples

Knowledge Hut

In Python, the following syntax is used to create an array- Variable _name = array ( type code, [value_list] ) For Example import array as arr myarray = arr. array ( ‘b’, [2, 3, 4, 5, 6] ) In the above code, the letter ‘b’ stands for the type code, and the value is an integer type. and an array acts as an identifier.

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