Group items tagged

There are many approaches available to scale PostgreSQL beyond running on a single server. An outline of the terminology and basic technologies involved is at High Availability and Load Balancing. There is a presentation covering some of these solutions. There is no one-size fits all replication software. You have to understand your requirements and how various approaches fit into that. For example, here are two extremes in the replication problem space: You have a few servers connected to a local network you want to always keep current for failover and load-balancing purposes. Here you would be considering solutions that are synchronous, eager, and therefore conflict-free. Your users take a local copy of the database with them on laptops when they leave the office, make changes while they are away, and need to merge those with the main database when they return. Here you'd want an asynchronous, lazy replication approach, and will be forced to consider how to handle conflicts in cases where the same record has been modified both on the master server and on a local copy. These are both database replication problems, but the best way to solve them is very different. And as you can see from these examples, replication has a lot of specific terminology that you'll have to understand to figure out what class of solution makes sense for your requirements. A great source for this background is in the Postgres-R Terms and Definitions for Database Replication. The main theoretical topic it doesn't mention is how to resolve conflict resolution in lazy replication cases like the laptop situation, which involves voting and similar schemes.

"EMF URI handler implementation that can persist EMF object instances to MongoDB. "

"A better way to build. Project automation is essential to the success of software projects. It should be straight-forward, easy and fun to implement. There is no one-size-fits-all process for builds. Therefore Gradle does not impose a rigid process over people. Yet we think finding and describing YOUR process is very important. And so, Gradle has the very best support for describing it. We don't believe in tools that save people from themselves. Gradle gives you all the freedom you need. Using Gradle you can create declarative, maintainable, concise and high-performance builds. "

"Hibernate OGM is an attempt to store data in a NoSQL data grid using he Hibernate Core engine rather than rewriting a JPA engine from scratch. The benefits are fairly obvious: reimplementing the complex JPA specification is a lot of work a new implementation would mature at a rather slow rate and risk of bugs would be high Hibernate is familiar to many people Earlier designs for this feature in Infinispan can be found on http://community.jboss.org/wiki/DesignofJPA-likeAPIandNewFineGrainedreplication"

"Blueprint provides a dependency injection framework for OSGi and was standardized by the OSGi Alliance in OSGi Compendium R4.2. It is designed to deal with the dynamic nature of OSGi, where services can become available and unavailable at any time. The specification is also designed to work with plain old Java objects (POJOs) enabling simple components to be written and unit tested in a JSE environment without needing to be aware of how they are assembled. The Blueprint XML files that define and describe the assembly of various components are key to the Blueprint programming model. The specification describes how the components get instantiated and wired together to form a running module. The following documentation covers the 80:20 usage of Blueprint. For further details, please refer to the OSGi Compendium R4.2 specification."

"The Open Services for Lifecycle Collaboration (OSLC) is an open (creative commons) REST based service specification aimed at improving/simplifying Application Lifecycle Management (ALM) system integration. A number of aspects of ALM integration are covered by OSLC ranging from Requirements Management to Automation(Build/Deploy). The OSLC Change Management (CM) spec outlines a standard for creating, modifying, and querying for change requests (tasks) from OSLC based service providers. A goal of the Mylyn project is to implement a client for OSLC-CM (see [1]). Additionally, support for both OSLC Automation and OSLC SCM are part of the Mylyn restructuring proposal: http://www.eclipse.org/project-slides/mylyn-restructuring-review.html Once these plans have solidified, we can begin to fill out the roadmaps for each specification. "

"Jsvc is a set of libraries and applications for making Java applications run on UNIX more easily. Jsvc allows the application (e.g. Tomcat) to perform some privileged operations as root (e.g. bind to a port < 1024), and then switch identity to a non-privileged user. It can run on Win32 via the Cygwin emulation layer (see Cygwin for more information), however Win32 users may prefer to use procrun instead, which allows the application to run as a Windows Service. The sources are located in the src/native/unix subdirectory. In the future APR may be used to provide more portable platform support. "

"Short screencasts that outlines features of applause, a domain-specific language (DSL) and code generator to produce native apps for iPhone, Android and BlackBerry. You can find this open-source project at code.google.com/​p/​applause"

"The general architecture of Jackrabbit can be described in three Layers: A Content Application Layer, an API Layer and a Content Repository Implementation Layer."

This page contains the latest compiled builds of Pentaho Data Integration (Kettle) community edition.  The builds are based on source code downloaded daily from SVN. Why download these snapshot builds? You want the latest version - to get the latest features in PDI. You want a more stable version - PDI point releases (e.g. 4.0.1) can include important bug fixes - see the PDI JIRA system for a full list of known issues. You need a bug fixed - You're struggling with a critical bug which has been fixed in a more recent version. To save time - You haven't got the time and/or inclination to learn about how to download PDI from SVN and build your own version.

" Openbravo ERP REST consists of a framework offering security and exception services and a data access REST web service implementation. The data access (DAL) REST web services provide a CRUD-like web service so that external applications can retrieve, update, create and delete business objects through standard HTTP requests. "

"I encourage (actually I dare you) to those who have never even touched a portal to take the JBoss Portlet Bridge for a test drive. It takes 1 download (GateIn bundled with JBoss) and one maven archetype to get started. You can choose from any combination of plain JSF, Richfaces, and Seam with mvn archetype:generate -DarchetypeCatalog=http://bit.ly/jbossportletbridge from the command line."

Each node in a Jackrabbit workspace tree has a node type that defines the child nodes and properties it may (or must) have. Developers can use node types to define a custom content model for their application domain and have Jackrabbit enforce the constraints of that model at the repository level.

Apache Shiro (pronounced "shee-roh", the Japanese word for 'castle') is a powerful and easy-to-use Java security framework that performs authentication, authorization, cryptography, and session management and can be used to secure any application - from the command line applications, mobile applications to the largest web and enterprise applications. Shiro provides the application security API to perform the following aspects (I like to call these the 4 cornerstones of application security): Authentication - proving user identity, often called user 'login'. Authorization - access control Cryptography - protecting or hiding data from prying eyes Session Management - per-user time-sensitive state Shiro also supports some auxiliary features, such as web application security, unit testing, and multithreading support, but these exist to reinforce the above four primary concerns.

"The PHP/Java Bridge is an implementation of a streaming, XML-based network protocol, which can be used to connect a native script engine, for example PHP, Scheme or Python, with a Java virtual machine. It is up to 50 times faster than local RPC via SOAP, requires less resources on the web-server side. It is faster and more reliable than direct communication via the Java Native Interface, and it requires no additional components to invoke Java procedures from PHP or PHP procedures from Java. "

" Xtext has been released as a part of the Eclipse Galileo release train on June 24th, 2009. Xtext is a framework for building DLSs (domain specific languages). In fact, it can be seen as a DSL for defining DSLs. In this article, we will develop a small DSL for defining entities."