Displaying 1 to 20 from 95 results

Cache using Hazelcast InMemory Data Grid

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Hazelcast is an open source In-Memory Data Grid (IMDG). It provides elastically scalable distributed In-Memory computing, widely recognized as the fastest and most scalable approach to application performance. Hazelcast makes distributed computing simple by offering distributed implementations of many developer-friendly interfaces from Java such as Map, Queue, ExecutorService, Lock and JCache.

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Light4j Cookbook - Rest API, CORS and RDBMS

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Light 4j is a fast, lightweight and cloud-native microservices framework. In this article, we will see what and how hybrid framework works and integrate with RDMS databases like MySQL, also built in option of CORS handler for in-flight request.

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Caching using Ehcache Java Library

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Ehcache from Terracotta is one of Java's most widely used Cache. It is concurrent and highly scalable. It has small footprint with SL4J as the only dependencies. It supports multiple strategies like Expiration policies, Eviction policies. It supports three storage tiers, heap, off-heap, disk storage. There are very few caching products supports multiple tier storage. If you want to scale, you cannot store all items in heap there should be support for off-heap and disk storage. Ehcache is licensed under Apache 2.0. In this article, we can see about basic usage of Ehcache.

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Getting Started on Undertow Server

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Undertow is a high performing web server which can be used for both blocking and non-blocking tasks. It is extermely flexible as application can assemble the parts in whatever way it would make sense. It also supports Servlet 4.0, JSR-356 compliant web socket implementation. Undertow is licensed under Apache License, Version 2.0.

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Thymeleaf - Text display, Iteration and Conditionals

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Thymeleaf is a server-side Java template engine for both web and standalone environments. It is a better alternative to JavaServer Pages (JSP). Spring MVC and Thymeleaf compliment each other if chosen for web application development. In this article, we will discuss how to use Thymeleaf.

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How to install and setup Redis

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Redis is an open source (BSD licensed), in-memory data structure store, used also as a database cache and message broker. It is written in ANSI C and works in all the operating systems. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs, geospatial indexes with radius queries and streams. This article explains about how to install Redis.

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Introduction to Light 4J Microservices Framework

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Light 4j is fast, lightweight, secure and cloud native microservices platform written in Java 8. It is based on pure HTTP server without Java EE platform. It is hosted by server UnderTow. Light-4j and related frameworks are released under the Apache 2.0 license.

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8 Reasons Why Python Scores Over PHP for Web Development

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PHP, the general-purpose scripting language has been used since decades for socket programming and web development. But in recent times, Python has become the most sought after programming language. This all-purpose programming language is attracting more developers in the industry owing to its highly dynamic and extensible nature. Let's see how Python is winning over age-old PHP.

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Why Corporates should contribute to open source?

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Open source is leading innovation in all technological areas. Open source awareness has spread around the world. Schools and Colleges students speak about it. Government organization think about it. Corporates relay on open source technological stack to build their enterprise or cloud products.

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Advanced Programming Guide in Redis using Jedis

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Redis is an in-memory data structure store, used as a database, cache and message broker. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs, geospatial indexes with radius queries and streams. This blog covers the advanced concepts like cluster, publish and subscribe, pipeling concepts of Redis using Jedis Java library.

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Best open source Text Editors

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Text editors are mainly used by programmers and developers for manipulating plain text source code, editing configuration files or preparing documentation and even viewing error logs. Text editors is a piece of software which enables to create, modify and delete files that a programmer is using while creating website or mobile app.In this article, we will discuss about top 7 all-round performing text editors which is highly supportive for programmers.

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Introduction to Apache Cassandra

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Apache Cassandra was designed by Facebook and was open-sourced in July 2008. It is regarded as perfect choice when the users demand scalability and high availability without any impact towards performance. Apache Cassandra is highly scalable, high-performance distributed database designed to handle large voluminous amounts of data across many commodity servers with no failure.

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Holistic usage guide for OpenSSL

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OpenSSL is a general purpose cryptographty toolkit that provides an open source implementation of Transport Layer Security(TLS) and Secure Socket Layer(SSL) protocols. It is written in C,assembly and Perl language but wrappers are available in all languages. This article explains about OpenSSL commands.

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Quick Start Programming Guide for redis using java client Jedis

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Redis is an open source (BSD licensed), in-memory data structure store, used also as a database cache and message broker. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs, geospatial indexes with radius queries and streams. This article explains about how to communicate with Redis using Java client Jedis.

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PySpark: Installation, RDDs, MLib, Broadcast and Accumulator

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We knew that Apace Spark- the most famous parallel computing model or processing the massive data set is written in Scala programming language. The Apace foundation offered a tool to support the Python in Spark which was named PySpark. The PySpark allows us to use RDDs in Python programming language through a library called Py4j. This article provides basic introduction about PySpark, RDD, MLib, Broadcase and Accumulator.

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Connect to MongoDB and Perform CRUD using Java

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MongoDB is a popular and widely used open source NoSQL database. MongoDB is a distributed database at its core, so high availability, horizontal scaling, and geographic distribution is quite possible. It is licensed under Server Side Public License. Recently they moved to Server Side Public License, before that MongoDB was released under AGPL. This article will provide basic example to connect and work with MongoDB using Java.

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Read and Write PDF using OpenPDF

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OpenPDF is based on a fork of iText version 4. iText is a widely used PDF library but they changed their license and moved to AGPL. In this article, we can see how to read and write to PDF, How to extract text from PDF and How to create password protected PDF.

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mkcert - No config certificate authority tool

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Mkcert is go-lang project, which is super easy tool to setup certificate authority without any configuration. Using certificates are inevitable these days, data should be transferred in a secure communication channel. Buying a certificate is expensive and mostly companies buy certificates only for production systems. In Dev setup, if we use self-signed certificate then there will be trust errors. mkcert automatically creates and installs a local CA in the system root store, and generates locally-trusted certificates.

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Top 3 color quantization algorithms

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I have been writing on the desktop image processing application. At the version 1.0, I use the octree color quantization algorithm to reduce image to 256 colors, which is highly memory efficient with each pixel assigned the color at the center of the octree bin in which it falls. On the other hand, generates the palette using the distribution of colors in the image, but it does not consider the frequency of color. This means that if an image is composed of similar colors overall but has many different low-frequency colors or noise, octree's results can be very poor.

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Compress files faster using Snappy

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Snappy is the fast compression/decompression library from Google. It does not target to reduce compression size but it does faster compression. Most of the open source products use Snappy.

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