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The clustering regulates high scalability and availability. The basic considerations for servlet clustering are:
1. Objects opened in a session could be serializable to support in-memory replication of sessions. Also consider the problem of serializing very big objects. Test the performance to make sure it is running.
2. Design for idempotence. Failure of an impatient or a request users clicking again may result in duplicate requests being given. So the Servlets could be relay to tolerate duplicate requests.
3. Avoid using static and instance variables in write and read mode because different instances can exist on different JVMs or on different operating system. Any state could be held in an external instance such as a database.
4. Avoid sending values in a ServletContext. It is not serializable and also the different resources may exist in different JVMs.
5. Avoid using java.io.* because the files cannot exist on all backend machines #question..
Suppose we have a big project. Draw hierarchy of the people involved in the project? Executive Team CEO, COO, CMSO Quality Architecture Team Business Development Team Technolog
We want the best java programmer available. Project Description: Java | Portlets| JSF Liferay (not essential but is preferable) Big Data and User online tools. Multilin
how to quit from unlimitedly executing applet
JavaServer Faces(JSF) is a framework for building web-based user interface in Java. Unlike Swing, JSF provides widgets like buttons, hyperlinks, checkboxes, etc. in dissimilar ways
How are this () and super() used with constructors? this() Constructors: is used to pointing current class instance. Can be used with methods or variables. Used to call
Illustrate the parser method The below table summarizes the parser methods available to a java programmer.
Write HTML and JavaScript code for the needs shown in the diagram below? When ConvertoUpperCase button is pressed then the entered text is converted to upper case and result is
Determine about the runtime Security Manager Java also has a runtime Security Manager can check which operations a specific piece of code is allowed to do. Consequently, java c
Write a CGI program in R, accessible through the class web server, that performs an analysis or creates a graph. You can provide a separate HTML page that displays the initial form
What is bandwidth? In a general way Bandwidth is a capacity of communication channel of carrying data.
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