Posts tagged REST
The attraction of APEX has increased tremendously with the recent launch of the Oracle Cloud. APEX already supported departmental development and deployment of business applications with minimal involvement from the IT department (only a database needed be made available). Positioned as the ideal replacement for MS Access, APEX probably has managed better to capture the eye of developers and was used for enterprise application development at least as much as for the kind of tactical applications that Oracle strategically positioned it for.
With APEX as PaaS & DevaaS from the Oracle Cloud, a leap is made to a much higher level of business value. Now the IT department is not even needed to make infrastructure available with a database running on it. All the business needs is a credit card. And the business application that is developed, managed and used from the cloud through a standard browser can now just as easily be accessed by users from around the world as by users from the business department itself. As a bonus – the development of the APEX application is also done in the cloud – with no special demands on the location or the enterprise access privileges of the More >
The show is over, the visitors are on their way home. The process of digesting the announcements, roadmaps and rumors – confirmed or not – can proceed in full swing. What has become of last year’s plans, what are this year’s plans (for next year and beyond) and what has materialized in terms of Oracle’s product portfolio. For everyone, the answers to these questions and the conclusions will be somewhat different – depending on focus, expectations and requirements. However, some conclusions will be shared by most who attended Oracle Open World 2012.
Without a doubt, some of the important themes were and will be: cloud – and at respectable distance – the next generation of database technology (12c) and of engineered systems (Exa… X3-v2), of mobile availability of both standard applications (Fusion Applications and other Oracle Applications products) and custom Portals and applications (through ADF Mobile on iOS and Android)Facts and Opinions
The Facts may seem the easy part – since these are more or less objective – but as soon as interpretation and clarification enter the fray , the absoluteness of the facts is not assured. For example around availability: is the Oracle Cloud More >
Review of Oracle Service Bus 11g Development Cookbook (Packt Publishing) by Edwin Biemond, Guido Schmutz, Eric Elzinga et. al.3
Recently I gained access to an electronic copy of the just released Oracle Service Bus 11g Development Cookbook, written by five authors – all experts on OSB and three personal acquaintances of mine. I was very interested in learning about the final result after hearing many intermediate comments during the writing process as well as reading the occasional remark on Twitter. Knowing Guido, Eric and Edwin and assuming the same expert level for the other two authors, I anticipated a very interesting read.
Below I will share my impressions from browsing through this solid 500+ page volume. Note: the homepage for the book can be found here: http://www.packtpub.com/oracle-service-bus-11g-development-cookbook/book .
No JDBC based data retrieval in Java applications – RESTstyle, JSON formatted HTTP based interaction from Java to Database1
This article demonstrates how Java application can query data from relational databases (well, in this case more specifically the Oracle RDBMS) without the use of plain old JDBC but instead through a simple HTTP interaction with a RESTful service that returns the data in JSON format.
In this way, issues with JDBC drivers, database connections, data sources and firewall and other network complications are avoided and the Java application does not contain a single bit of SQL.
This article will demonstrate how easy it is to set up the RESTful API from the database – using Oracle’s dbms_epg package – and how this API can be accessed from Java using JAX-RS (Jersey) and the json-lib utility library.
This topic is one of many to be discussed in Friday’s (4th February) Masterclass on Leveraging the Oracle Database in Java Application (some seats are available – go to http://www.amis.nl/trainingen/oracle-database-in-java-applications for registration and details).
WebServices are hot. Some more so than others. SOAP based WebServices are frequently seen as not very lean and agile. Robust – perhaps. Widely supported – no doubt about it. Key element of almost any SOA infrastructure – sure. Easy, lightweight to deploy or to program a client against – no, not really. Inituitive? Bookmarkable? Addressable? – none of those. Restful web-services are the easy to use, lightweight, navigation oriented complement to the more heavy weight WS* SOAP based web services. REST is the natural extension of HTTP – leveraging a lot of its potential in a very direct way. REST services focus on Resources – that are searched & retrieved, created, updated and deleted. Resources can refer to each other – through hyperlinks that equal new REST service calls. The representation of Resources – the format of the response received or sent by a client has to be agreed upon; it usually is XHTML, XML or plain text.
Under JSR-311, a formal specification for REST is being developed, with project Jersey – nearing its completion – the reference implementation. An even more mature Java project for RESTful services is RestLet – a fairly easy to use library that allows for easy More >