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What are the advantages of servlet technology compared to CGI (Common Gateway Interface)?
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Answer from AI
- Efficiency: Servlets run in threads of a single JVM process, avoiding the overhead of creating a new process for each request, as in CGI.
- Loading: Servlets are loaded once when the web server starts and remain in memory, which is much faster than repeatedly running CGI scripts.
- Resource Management: The web server manages the lifecycle of servlets (initialization, processing, destruction), freeing developers from manual management.
- Portability: Servlets written in Java are more platform-independent than CGI scripts, which are often tied to specific languages and operating systems.
- Reliability: The web server can automatically restart faulty servlets. Errors in one servlet are less likely to affect others.
- API: They provide a rich API for handling HTTP requests and responses, working with sessions, cookies, and other web-specific functions.
- Extensibility: Easily integrated with other Java technologies (JSP, EJB, etc.) and frameworks.
- Security: JVM provides more powerful security mechanisms than the CGI script runtime environment.