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We will send mail once in a week about latest updates on open source tools and technologies. subscribe our newsletterMongoDB 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.
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.
RESTEasy is a JBoss project that provides various frameworks to help you build RESTful Web Services and RESTful Java applications. It is a fully certified and portable implementation of the JAX-RS 2.1 specification, a JCP specification that provides a Java API for RESTful Web Services over the HTTP protocol. It is licensed under the Apache 2.0 license.
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.
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.
In our work there will be situation where we need to resize the image, generate thumbnails and so on. Users need to have little bit of image processing knowledge to achieve it. We have Java ImageIO APIs to achieve these functionalities. As said, we need to be aware of or spend time in learning these APIs. To help us, Thumbnailator library provides easy fluent style API and generates thumbnail in simple three lines of code.
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.
RESTEasy is JAX-RS 2.1 compliant framework for developing rest applications. It is a JBoss project that provides various frameworks to help you build RESTful Web Services and RESTful Java applications. It is a fully certified and portable implementation of the JAX-RS 2.1 specification, a JCP specification that provides a Java API for RESTful Web Services over the HTTP protocol.
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.
The Apache OpenNLP library is a machine learning based toolkit for the processing of natural language text. OpenNLP also includes entropy and perceptron based machine learning. . It contains several components for natural language processing pipeline like sentence detector, tokenizer, name finder, document categorizer, part-of-speech tagger, chunker, parser, co-reference resolution.
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.
Json Web Token shortly called as JWT becomes defacto standard for authenticating REST API. In a traditional web application, once the user login credentials are validated, loggedin user object will be stored in session. Till user logs out, session will remain and user can work on the web application without any issues. Rest world is stateless, it is difficult to identify whether the user is already authenticated. One way is to use authenticate every API but that would be too expensive task as the client has to provide credentials in every API. Another approach is to use token.
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.
RESTEasy is a JBoss project that provides various frameworks to help you build RESTful Web Services and RESTful Java applications. It comprises of frameworks for mock, embeddable server, rest client, proxy servers, logging and so on.In this article, we will walk-through ETag implementation and show the behaviour related to ETag done by rest easy framework. Example is developed using RESTEasy 3.7 and deployed in tomcat as RESTEasy framework is portable.
LogicalDOC is both a document management and a collaboration system. The software is loaded with many functions and allows organizing, indexing, retrieving, controlling and distributing important business documents securely and safely for any organization and individual.
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.
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.
This is the most frequently asked questions in the interview. Googling will throw many links related to this topic. How to learn the implementation of hash map? My style of learning using open source learning technique.
In any project there will be a need to send mail out to users. It could be an alert mail, forget password or authentication related mail. Mail is the default communication between the software and the users. As a developer, we can write code, to send out a mail but we need to make sure whether it got successfully received and how the body of mail, Is it the same like what we have sent. GreenMail is a Email test framework which helps to send and receive mails. It is a test framework which supports SMTP, POP3, IMAP including SSL.
Spring Boot is a microservice-based Java framework used to create web application. WebSocket API is an advanced technology that provides full-duplex communication channels over a single TCP connection. This article explains about how to implement WebSocket using Spring Boot.
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