HOW MUCH DIFFER SERVLET FROM CGI?

Rajesh Goswami

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Points:203
Posted by  Rajesh Goswami
Java 
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which types of benifits come in servlet instead of cgi?
  1. Awadhendra Tiwari

    Post:126

    Points:882
    Re: how much differ servlet from cgi?

    Servlets have a number of advantages over CGI and other API's. They are:

    1. Platform Independence
      Servlets are written entirely in java so these are platform independent. Servlets can run on any Servlet enabled web server. For example if you develop an web application in windows machine running Java web server, you can easily run the same on apache web server (if Apache Serve is installed) without modification or compilation of code. Platform independency of servlets provide a great advantages over alternatives of servlets.
    2. Performance
      Due to interpreted nature of java, programs written in java are slow. But the java servlets runs very fast. These are due to the way servlets run on web server. For any program initialization takes significant amount of time. But in case of servlets initialization takes place first time it receives a request and remains in memory till times out or server shut downs. After servlet is loaded, to handle a new request it simply creates a new thread and runs service method of servlet. In comparison to traditional CGI scripts which creates a new process to serve the request.
    3. Extensibility
      Java Servlets are developed in java which is robust, well-designed and object oriented language which can be extended or polymorphed into new objects. So the java servlets take all these advantages and can be extended from existing class to provide the ideal solutions.
    4. Safety
      Java provides very good safety features like memory management, exception handling etc. Servlets inherits all these features and emerged as a very powerful web server extension.
    5. Secure
      Servlets are server side components, so it inherits the security provided by the web server. Servlets are also benefited with Java Security Manager.

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