While it is widely reported that Google Web Toolkit does not support Java Threads and multi-threading, a number of aspects of concurrent applications can be emulated in GWT's single thread JavaScript world. The particular features that are relatively easy to emulate are: * Timers * Background Execution * Locks * 'Thread-safe&
Github is an awesome repository to share your source code. Although there are numerous tutorials discussing how to use git and eclipse, I got stuck again today while trying to upload an existing eclipse project to github. This tutorial walks thus through all the steps from signing up for github
A new version for the onedb client libraries (0.0.3) is now available for direct download or as maven dependency. The new versions will work with any API key obtained from www.onedb.de. onedb Java Test Toolkit: <dependency> <groupId>one.test.jre</groupId&
onedb is at its heart a cloud-based platform to connect pieces of information from various applications. These 'pieces of information' are represented and accessed in various ways in the onedb API. The article "onedb Architecture and Design" provides a conceptual definition of most ways in which
I have just uploaded new onedb client libraries with version number 0.0.2. The new client libraries mainly incorporate an advice from Java API expert Lukas Eder (check out JOOQ - a neat way to access SQL databases using a fluent Java API): All callback methods in the core
onedb is the database engine at the heart of the appjangle platform. This tutorial gives an overview of a number of capabilities of the onedb engine. The following topics are discussed in this tutorial: Part I: Set Up 1. Getting an API key 2. Download the client library 3. Linking
Think about getting the persistence back-end of your next web app right ... sharding, replication, mapping, partitioning, consistency, latency, indices, durability, atomicity, isolation ... any terms familiar? Familar maybe, but certainly not pleasant. Modern database systems (e.g. RDMBS/Object DB/Graph DB) are easily one of the most complex aspects of
This article gives a brief overview of a number of key design concepts underlying the onedb service: * Architecture Overview * Core Data Model * Realms * Core Operations * Client Sessions * Synchronization For an introduction to onedb and the motivation for this service, please check the article "Introducing onedb: Connect Small Data in
Data is growing bigger. The increased scale of contemporary applications is often measured in the currencies of terabytes and thousands of transactions per second. An amazing array of tremendous new and old technologies help in dealing with this increased scale: reaching from clouds in various shapes to scalable NoSQL databases
The Problem You would like to be able to create UNIX directories with numerical names, which increase incrementally, for instance: 0000 0001 0002 0003 etc. The Solution Just execute the following bash script in a directory, which contains at least the subdirectory '0000'. The script will create a
Given we have a script test.sh, it is easy to run this script in the background while continuing to work in the current shell session. The most cited way is by adding '&' to the end of the command: ./test.sh & However, this approach has one
Java's non-blocking IO (NIO) is a complex, yet amazingly powerful addition to Java to build scalable and performant network applications. The capabilities of Java NIO are particularly impressive if compared with alternative ways in the JRE to connect to web resources over http. Here is a small collection
