I can understand the purpose of an actual physical server which has the purpose of running applications, but that is more of a hardware thing. It seems Java has a variety of software applications that are classified as application servers, like TomCat and GlassFish. What is the purpose of these programs?What is the purpose of a Java Application Server?
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The purpose of an App Server is to provide basic services that are needed by most applicationss.
For example, most applications need to make more than one connection to a database. But creating connections is expensive, so a instead of creating a new connection each time, it is better to have a pool of connections from which an App can grab an unused connection. Thus, database connection pooling is a basic service that is provided by an app server.
Other services include: security, logging, monitoring, deployment management, and transaction managementt.What is the purpose of a Java Application Server?
Basically servers that support J2EE container, this includes tomcat, glassfish, jboss, weblogic (oracle), weblogic (ibm), and others. Apache HTTP server does not support J2EE therefore it cannot run servlets, web services, or other components of J2EE. Hope this help.
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