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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..
Messaging is a method of communication among software components or applications. A messaging system is a peer-to-peer facility: A messaging client can send messages to, and receiv
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can you explain me the er diagram for the online doctor system
What are the role of Keywords in java? Keywords are identifiers such as public, static and class in which have a special meaning inside Java source code and outside of comments
Write a Java application to simulate a bank system. In the system, customers can open new bank accounts with the bank, and register/use an online account to manage their bank accou
Remote Method Invocation (RMI) is the process of activating a method on a remotely running object. RMI offers location transparency in the sense that it gives the feel that a metho
What is the name of the services you have chosen? What do they do? What is the name of the publisher? Provide details if you are developing your own service(s). There are variou
Are constructors inherited ? Can a subclass call the parent class constructor and When?
Separating your business logic with other functionality such as services, Loggers etc, making classess more cohesive.
how to solve this error
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