Passion of IT

Posts in category Software engineering, architectures and distribuited systems (16)

Data types to exchange information

xml
There are a lot of ways to exchange information between two systems written in different technologies. The first way is using CSV (comma separated values): it is a simple text file (in windows is opened by excel) that contains a table having fields split by a fixed character specified before than this file is written. There are a lot of libra [...]

Enterprise Java Beans and all J2EE

container-ejb
This is a schema of a simple java application     1 Presentation layer The presentation layer is the software to show web pages and to allow the user interaction it is a http client called browser (for example mozila firefox or google chrome or microsoft internet explorer) this software executes a http request and processes the res [...]

Remote Method Invocation

RMI Project
The first way invented to allow at computer client to call a remote method present on the computer server was RMI, after was created the middleware CORBA and now the most used way to make the communication between client and server is web services.   A middleware is another layer of iso-osi that is over the fourth layer (transport) and h [...]

JMS and JNDI

jms-programmingModel
The most largely used architecture for web applications is “Client server” and the communication between both participants is the following: Client sends a request to the server which will process this data and sends the response Typical Example is google: when you search a word, the server answers to your question and sends the r [...]

JPA, REST and SOAP

WebService
Yesterday I added to my Java project (temporany name: “AffittaVetrina”) three important technologies: JPA (Java persistence API)  is a specific ORM (object relational mapping) for JAVA this technology is used for mapping the table of DB in java classes that are also serializable, for these reasons jpa is used with web services. Th [...]

How to make your dreams tue?

images8K2OPJA8
I think that a goal is a dream with a deadline. when you have a dream and you want to make it true, the best way to act is to  transform the dream in a target, then it’s necessary to write a plan with all the intermediate objectives and the final expiration date. In this way you write the project to make your dream true. For example if [...]

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