20 Database Design Best Practices - Java Code Geeks
Cagdas BasaranerFebruary 3rd, 2012Last Updated: December 29th, 2012 Use well defined and consistent names for tables and columns (e.g. School, StudentCourse, CourseID …).Use singular for table names (i.e. use StudentCourse instead of StudentCourses). Table represents a collection of entities, there is no need for plural names.Don’t use spaces for table names. Otherwise you will have to use ‘{‘, ‘[
5 Error Tracking Tools Java Developers Should Know
Alex ZhitnitskySeptember 23rd, 2014Last Updated: September 30th, 2014 Raygun, Stack Hunter, Sentry, Takipi and Airbrake: Modern developer tools to help you crush bugs before bugs crush your app! With the Java ecosystem going forward, web applications serving growing numbers of requests and users’ demand for high performance – comes a new breed of modern development tools. A fast paced environment
Benchmarking SQS
SQS, Simple Message Queue, is a message-queue-as-a-service offering from Amazon Web Services. It supports only a handful of messaging operations, far from the complexity of e.g. AMQP, but thanks to the easy to understand interfaces, and the as-a-service nature, it is very useful in a number of situations. But how fast is SQS? How does it scale? Is it useful only for low-volume messaging, or can it
Off Heap concurrent counter
Concurrent counter are part of almost every system, it is used to collect data, thread synchronization etc. Java has good support of heap based counter. There could be use case when you need counter that can be shared between processor. How to build inter process countersDatabaseThis is first option that comes to mind, database sequence is counter that can be used by multiple process. All concurre
The power of PROC file system in Linux
Saurab ParakhFebruary 3rd, 2014Last Updated: February 3rd, 2014 The Linux kernel has two primary functions: to control access to physical devices on the computer and to schedule when and how processes interact with these devices. The /proc/ directory — also called the proc file system — contains a hierarchy of special files which represent the current state of the kernel — allowing applications an
Log4j 2: Performance close to insane
Recently a respected member of the Apache community tried Log4j 2 and wrote on Twitter: @TheASF #log4j2 rocks big times! Performance is close to insane ^^ http://t.co/04K6F4Xkaa — Mark Struberg (@struberg) May 7, 2013 (Quote from Mark Struberg: @TheASF #log4j2 rocks big times! Performance is close to insane ^^ http://logging.apache.org/log4j/2.x/ ) It happened shortly after Remko Popma contributed
Serialization in java
Java provides mechanism called serialization to persists java objects in a form of ordered or sequence of bytes that includes the object’s data as well as information about the object’s type and the types of data stored in the object. So if we have serialize any object then it can be read and deserialize it using object’s type and other information so we can retrieve original object. Classes Objec
Erlang vs Java memory architecture - Java Code Geeks
I read a really, really interesting article on memory management strategies for the Erlang VM. It was written as a thesis by Jesper Wilhelmsson I thought it might be nice to discuss the differences between Erlang‘s memory setup and Oracle’s Java VM. As a real short introduction for those who have never heard of Erlang; it is a functional language that uses asynchronous message passing as its basis
Java Tools: Source Code Optimization and Analysis - Java Code Geeks
Below is a list of some tools that can help you examine your Java source code for potential problems: 1. PMD from http://pmd.sourceforge.net/ License: PMD is licensed under a “BSD-style” license PMD scans Java source code and looks for potential problems like: * Possible bugs – empty try/catch/finally/switch statements * Dead code – unused local variables, parameters and private methods * Suboptim
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