Define the considerations for servlet clustering? , JAVA Programming

Assignment Help:

 

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..

 


Related Discussions:- Define the considerations for servlet clustering?

What types of new jobs are created because of computing, What types of new ...

What types of new jobs are created because of computing? And that old professions are being eliminated? Because of computing whereas people are getting benefits from automated

What is includeaction, The IncludeAction class is useful when you require t...

The IncludeAction class is useful when you require to integrate Struts into an application that uses Servlets. Use the IncludeAction class to contain another resource in the respon

How to returning multiple values from methods, How to Returning Multiple Va...

How to Returning Multiple Values From Methods ? It is not probable to return more than one value from techniques. You cannot, for example, return the licensePlate, speed and m

Difference between an interface and an abstract class, What is the differen...

What is the difference between an Interface and an Abstract class? An abstract class can have instance methods that execute a default behavior. An Interface can only declare co

How to loading images in java, How to Loading Images in JAVA? Polygons,...

How to Loading Images in JAVA? Polygons, ovals, lines and text cover a lot of ground. The residual graphic object you need is an image. Images in Java are bitmapped GIF or JPEG

Polymorphism, Polymorphism - defines the ability of a single variable of ...

Polymorphism - defines the ability of a single variable of a provided type to be used to reference objects of different types, and automatically call the method that is specific

What is static in java, What is static in java? Static means one per cl...

What is static in java? Static means one per class, not one for each object no matter how many example of a class might exist. This means that you can use them without making a

Statements and operators, Operator Functionality E x...

Operator Functionality E x ample/Explanation = Sets one value equal to another counter=0  Sets the counter to equivale

Difference among microprocessors and microcontrollers, What is the differen...

What is the difference among microprocessors and microcontrollers? Give one example of both? The microprocessor is electronic equipment that can perform various functions and a

Enumerate the java program development and execution steps, Java Program De...

Java Program Development and Execution Steps Java program normally go through five phases. These are 1. Edit, 2. Compile, 3. Load, 4. Verify and 5. Execute Co

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd