We do not currently support JSP pages as they can be resource hungry and are not viable in a shared hosting environment. We usually recommend that customers wanting to use Java servlets go on their own dedicated server for enhanced reliability and security for their Java environment. You can request a dedicated quote here.

Author: Alex Chaffee (http://www.jguru.com/guru/viewbio.jsp?EID=3) Question originally posed by swati m (http://www.jguru.com/guru/viewbio.jsp?EID=64343 Applets run inside browsers, and servlets run inside servers. So broadly speaking, use applets when you need dynamism on the client side, and use servlets when you need dynamism on the server side. Servlets can produce any HTML (or indeed, any file type), and therefore are much more versatile than applets.

My web application uses JavaMail to attach and send a file that the user specifies, but my application can't find the file.

Latest Answer: JSP vs Servlet1) Servlet is pure java codes, which is used to extend the web server by providing dyn... Latest Answer: Servlet tunneling means when one request from a servlet is passed to another servlet in order to ach...

Servlets are server-side Java applications, as opposed to client-side applets or standalone applications. While servlets are compatible with many different types of servers, typically they are used in web servers, as a replacement for CGI scripts or Active-Server Pages (ASP). Java servlets offer many advantages over other forms of server-side processing.

By default, servlets are multi-threaded. If you specifically require a single-threaded servlet, you should implement the javax.servlet.SingleThreadModel interface. This guarantees that no two threads will be operating on the same instance of the servlet, but still allows concurrent execution of the servlet. The servlet engine will maintain a pool of available threads, and create new instances of the servlet as required.

The servlet HttpSession interface is used to simulate the concept that a person's visit to a Web site is one continuous series of interactions. This is often the case, but the HTTP protocol is basically a request-response mechanism with no necessary connection between one request and the next.

This can be done with optional mod_rewrite module, a a rule-based rewriting engine to rewrite requested URLs on the fly. The idea is to rewrite incoming URL with different Servlet mount points in order to be able to distribute requests on different Apache JServ's. In the following sample, a random load-balancing is performed on 3 servlet engines (but mod_rewrite can make more for you).

A servlet session is created and stored on the server side. The servlet container keeps track of all the sessions it manages and fulfils servlet API requests to get HttpSessions, manipulate object data stored with them and trigger event callbacks. First, it is best to use a single servlet to handle each form submission. A single servlet for all input would be too complicated.

Yes, you can! The complete separation between the web server and the server engine allows you to connect multiple servlet engines to the same web server. If these servlet engines are started in standalone mode using the wrapper with different UID/GID, you end up having multiple secured servlet environments. Of course, this requires a different JVM for each secured servlet environment.

Use the previous sample, and create a "watchdog program", that is able to delete an entry in the load_balancer.txt file. you are trying to connect directly to the port Apache JServ is listening on (usually 8007). Eg. the following is usually wrong: This is doesn't work because Apache JServ is not an HTTP server, but an AJP server (see Apache JServ Protocol for more information) and does not understand HTTP requests on that port.

Gamelan's TechFocus recently published a two-part introductory tutorial on servlets, which I can highly recommend. For more information see http://www.gamelan.com/journal/techworkshop/ I also highly recommend the book, Developing Java Servlets, by James Goodwill. The publisher is Sams, and the ISBN is 0672316005.

To setup servlet, you need to configure servlet into the file web.xml which needs to be placed in /var/www/html/WEB-INF directory. By default all the logging activity will be placed within the /var/log/ directory of your application. If a telnet shell is enabled on your account then 'tailing' the logs can provide a powerful tool in debugging your web application. Viewing the logs is recommended when you suspect that errors are occurring during the loading/reloading of your web application.

Refactoring J2EE components to delegate functionality to other objects that don't have to be run in a J2EE container will improve the design and testability of the software. Cactus is an open source JUnit extension that can be used to test J2EE components in their natural environment.

JSP pages are compiled into servlets, so theoretically you could write servlets to support your web-based applications. However, JSP technology was designed to simplify the process of creating pages by separating web presentation from web content. In many applications, the response sent to the client is a combination of template data and dynamically-generated data. In this situation, it is much easier to work with JSP pages than to do everything with servlets.

Hi..Sir, I want to create a prog. using jdbc,servlets.i.e. when i enter username,password from html that username,password stored in database using servlets. Please be forward.thank you. in web.xml ,we have init-param tag in that we will mention param name and param value ,in b/w the tags strings are written and the are accessed thru servletconfig.getparameter,but while using struts in web.

Yes. By starting OC4J using a JVM executing in debug mode it is possible to remotely debug Servlet code as it executes. To debug applications running on OC4J you must supply the standard JVM debug properties when starting the JVM. java -classic -Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8000 -jar orion.

We currently provide a Unix-only hosting solution. Due to technological limitations these technologies are restricted to Windows platforms only and are not supported by our servers. We do however support many popular alternatives to the above such as MySQL, PHP, Perl and many others.