Why is an application server required
What is an application server?
The application server is part of a so-called client-server network. Various application programs, such as Microsoft Excel, Microsoft Word, but also, for example, the company calendar, address management, etc., which the client can access and use directly, are usually installed on the application server. Furthermore, the application server enables users to carry out transactions and is significantly involved in the authentication process that users have to complete in order to gain access to databases and directories with company-sensitive data.
WORTH KNOWING: THE APPLICATION SERVER IS BASED ON EITHER THE APACHE, .NET OR JEE, SAP WEB APPLICATION SERVER, ETC. . THE APPLICATIONS TO BE INSTALLED MUST ALWAYS BE RUNNING ON THE RELEVANT SERVER TYPE.
The properties of the application server
The application server provides a runtime environment for the server-side part of an application within the client-server network. The application server has special implicit and explicit properties.
- Software lifecycle management or application lifecycle management (delivery, deployment, patches, upgrade)
- Monitoring function
- Management function
- Logging function
- Calibration options
It is not necessary to modify the applications here because the application server can be scaled.
- Preservation of persistence
- Transaction processing
- Asynchronous communication and connection of higher quality services
- Directory services
- Standardized options for connecting databases
There are different versions of the application servers, each with its own application area.
What does a Java application server do?
The possible uses of a Java application server are determined by the core set of the API and its functions. Usually, a Java EE infrastructure is always divided into several containers.
- EJB container: The Enterprise JavaBeans Container is used to manage transactions. In addition to the declared transaction management and the scalability of the applications, these modular server components also offer a large number of other functions.
- Web container: The web modules include servlets and JavaServer Pages (JSP).
- JCA container (Java EE Connector Architecture)
- JMS provider (Java Message Service)
WORTH KNOWING: WITH SOME JAVA APPLICATION SERVERN JAVA EE FUNCTIONS SUCH AS EJB, JAVA MESSAGE SERVICE (JMS) OR JETTY MAY COMPLETELY MISSING. THE FOCAL POINT OF THOSE ARE GENERALLY MORE ON JAVA SERVLETS OR JAVA SERVER PAGES.
THERE ARE MANY OPEN SOURCE JAVA APPLICATION SERVERS THAT SUPPORT JAVA EE, INCLUDING JONAS FROM OBJECT WEB, WILDFLY (FORMERLY JBOSS AS) FROM JBOSS (DIVISION OF RED HAT), GERONIMO FROM APACHE CAUCHO TECHNOLOGY, BLAZIX FROM DESIDERATA SOFTWARE, ENHYDRA SERVER FROM ENHYDRA.ORG, GLASSFISH FROM ORACLE AND PAYARA SERVER FROM C2B2.
When will PHP application servers
PHP application servers are used for the operation and administration of PHP applications.
Which PHP application servers are there?
- The Zend Server, developed by Zend Technologies, offers application server functionality for PHP-based applications.
- appserver.io, developed by TechDivision GmbH, is a multithreaded application server for PHP.
What is a mobile application server?
A mobile app server is a mobile middleware that makes backend systems accessible for mobile applications in order to support the development of mobile applications. Similar to a web server that stores, processes and delivers websites to customers, a mobile app server closes the gap between an existing infrastructure and mobile devices.
Why is a mobile application server necessary?
Although most standards-based infrastructures (including SOAs) are designed to connect to any vendor, product, or technology, most organizations struggle to connect back-end systems to mobile applications because mobile devices pose the following technological challenges :
- Limited resources: Mobile devices have limited performance and bandwidth.
- Intermittent connectivity: Cellular communications and WiFi are often discontinuous.
- Difficult to secure: Mobility and BYOD make it difficult to secure mobile devices.
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