Skip to main content
View by: Most Recent | Topic | Community | Webloggers   
Monthly Archives:    

Blogs by topic: Databases

• Accessibility • Ajax • Blogging • Business • Community 
• Databases • Deployment • Distributed • Eclipse • Education 
• EJB • Extreme Programming • Games • GlassFish • Grid 
• GUI • IDE • Instant Messaging • J2EE • J2ME 
• J2SE • Jakarta • JavaFX • JavaOne • Jini 
• JSP • JSR • JXTA • LDAP • Linux 
• Mobility • NetBeans • Open Source • OpenSolaris • OSGi 
• P2P • Patterns • Performance • Porting • Programming 
• Research • RMI • RSS Feeds • Search • Security 
• Servlets • Struts • Swing • Testing • Tools 
• Virtual Machine • Web Applications • Web Design • Web Development Tools • Web Services and XML 


Community

R and Streaming by Alex Holmes, author of Hadoop in Practice A data scientist needs a way to be able to use R in conjunction with Hadoop and bridge the gap between Hadoop and the huge database of learnings that exist in R. In this article, based on chapter 8 of Hadoop in Practice, author Alex Holmes shows how you can use R in combination with Hadoop Streaming. With Hadoop Streaming, you can...
on Oct 10, 2012
Creating a Reusable Service (by Jos Dirksen, Author of "SOA Governance") August 29, 2012 Manning Publications Co. Having a standard-based search engine as an access point to your service is a good way to improve the reusability of your service. In this article based on chapter 4 of SOA Governance in Action, author Jos Dirksen presents you with a couple of guidelines that can help you in...
on Sep 5, 2012
Our Java application supports my company's (Amway Corp) Customer and Sales Compensation areas. This is a very unique and complex part the Amway's business model. The application requires a large database to store business-related data. The database consists of dozens of tables and millions of rows. It contains transactional data and summarized data. The size of the database grows daily. Database...
on Jun 18, 2012
Release the newest version of the framework to persist objects in Apache Cassandra in easy way. Among improvement is the JPA annotations, also JPQL.   JCassandra jCassandra=persistence.createJCassandra("select * from Person"); List<Person> persons=jCassandra.getResultList(); table 1: sample using JPQL in Easy-Cassandra This version has the improvements below: Supporting...
on May 26, 2012
  Running the new version of the Easy-Cassandra framework it main objective is making it easy the communication between Apache Cassandra and your application in java. With it you able create, update, retrieve, delete the java's objects in easy way and simple, for this you must add some annotation in Class and fields.   Characteristics     An ORM easy to use in Cassandra...
on Mar 17, 2012
    Nowadays the Enterprise applications beyond persist String and number also can save file. Persist this information is very interesting, for example, a civil process there are information about the process (name of author, date, number of protocol) and the document which represents, or a twett with an image. In Apache Cassandra, you can save file, but for large file you should use...
on Feb 1, 2012
In JUG-AFRICA we started an Open Source project to manage the BIG ANNUAL EVENTS for our JUGs. The first release will be available in the early second half of January. The application will provide all services bellow via the REST Web services :     - Appointment Manager - Conference Manager - Paper reviews and approval Manager - Profile Manager - Registration Manager - Sponsorship...
on Jan 2, 2011

Databases

        Launched the latest Easy-cassandra version, that come with improvements to manage multi-nodes. Use many node is very usefully in Cassandra because avoid bottlenecks, fault tolerance, elasticity.     After have multi-nodes in Cassandra, the next step is divide task between their. Secondly join the databases like only one ( reply all information among their...
on Oct 3, 2012
by Raymond Roestenburg and Rob Bakker, authors of Akka in Action Save 40% on Akka in Action and other selected books. ScalaTest is a xUnit style testing framework. An actor is an object that can be reached through an address, processes messages from a mailbox and sends messages to other actors using the same type of addresses. An actor encapsulates state; it does not share this state with...
on Sep 28, 2012
by Florian Müller, Jay Brown, and Jeff Potts, authors of CMIS and Apache Chemistry in Action Save 40% on CMIS and Apache Chemistry in Action. Use promo code 12netja when you check out at manning.com Enterprise Content Management (ECM) repositories often have a lot of types defined, sometimes hundreds in extreme cases. This means that there needs to be a way to organize and retrieve them in a...
on Sep 19, 2012
by Dan McCreary and Ann Kelly, Authors of Making Sense of NoSQL Bigtable systems are important NoSQL data architecture patterns because they can quickly scale to manage large data volumes. They are also known to be closely tied with many MapReduce systems. In this article from Making Sense of NoSQL, the authors discuss how Bigtable systems store data using row and column keys and how they...
on Sep 10, 2012
Release the newest version of the framework to persist objects in Apache Cassandra in easy way. Among improvement is the JPA annotations, also JPQL.   JCassandra jCassandra=persistence.createJCassandra("select * from Person"); List<Person> persons=jCassandra.getResultList(); table 1: sample using JPQL in Easy-Cassandra Easy-Cassandra 1.0.8 Easy-Cassandra 1.0...
on Apr 21, 2012
Sometimes we use caches for speeding up by alleviating database load. And the Memcached is the bestknown in-memory key-value store(cache). For using Memcached, you need clients and many clients already exist. You can also find Memcached clients based on Java. Though there are already good Memcached clients which have optimized Memcached operations a long time, I would like to introduce...
on Mar 2, 2012
I'm at Strata Santa Clara again this year.  I'll post my raw notes.  Hope you find them helpful.
on Feb 28, 2012
 Tonight I bundled the cassandra command-line interface (CLI) into virgil. Since the CLI uses the thrift-based CassandraDaemon, the main method now starts a thrift server along side the REST server.     Now, when you (or your application) issues commands through the REST interface, you can verify that they worked through the command-line interface. For more information, check...
on Oct 24, 2011
Love Cassandra? Love REST? Wish you could have both at the same time? Now you can. After much discussion, I'm happy to announce the birth of a new project, Virgil. The project will provide a GUI and a services layer on top of Cassandra, exposing data and services via REST. Virgil already has a REST layer for CRUD operations against keyspaces, column families, and data. We hope to quickly...
on Oct 22, 2011
A few months ago James Gosling turned up at Liquid Robotics. Liquid Robotics designs robots called Wave Gliders that collect sensor data while wandering the seas. Rowboat sized, they raft along on the surface propelled by an underwater sled which translates vertical wave action into thrust. Solar powered, they are self-sufficient and able travel thousands of miles while transmitting data....
on Sep 22, 2011
The movement towards digital records is generating exponential amounts of data, tremendously valuable data. But building a system to manage that data and extract value from it requires acceptance of a paradox; the system needs to be flexible and tolerant, while simultaneously enforcing structure and standards. This is hard. Many of us have felt the pain of Master Data Management (MDM). In large...
on Sep 9, 2011
in JPA it is possible to map String-data to enumerated values. But you are limited to Strings that are legal to be used in enum-types. E.g. using '-' or plain numbers will not work. An enum using such characters will not compile: public enum ThisWillNotCompile {   VALUE,   123,   hello-world;} Thus JPA doesn't allow to map such values to enum-types (in fact it's not...
on Aug 24, 2011
Accessing MySQL from Embedded GlassFish .ln { color: rgb(0,0,0); font-weight: normal; font-style: normal; } .s0 { color: rgb(128,128,128); } .s1 { } .s2 { color: rgb(0,0,255); } .s3 { color: rgb(128,128,128); font-weight: bold; } .s4 { color: rgb(255,0,255); } .s5 { color: rgb(0,0,128); } Using MySQL database with GlassFish is nothing new. However I just wanted to share a small note on how I...
on Apr 4, 2011