JSP in Java

How Many Messaging Models do JMS Provide for and what are they

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JMS provide for two messaging models, publish-and-subscribe and point-to-point queuing. Java Message Service (JMS) provides two messaging models: Point-to-Point (P2P) Model: In this model, messages are sent from one producer to one consumer. The messages are placed on a queue, and only one consumer can consume a message. The point-to-point model is typically used for … Read more

The Code in a Finally Clause will Never Fail to Execute, Right

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Using System.exit(1); in try block will not allow finally code to execute The code in a finally clause is designed to execute regardless of whether an exception is thrown or not. However, there are certain situations where the finally block may not execute. Here are a few scenarios: System.exit(): If the JVM exits, the finally … Read more

How can a Servlet Refresh Automatically, If Some New Data has Entered the Database

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You can use a client-side Refresh or Server Push. To automatically refresh a servlet when new data has entered the database, you can consider implementing a mechanism known as “long polling” or using technologies like WebSockets. Here’s a brief explanation of both approaches: Long Polling: In long polling, the client makes a request to the … Read more

Can we Use the Constructor, Instead of init(), to Initialize Servlet

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Yes, of course you can use the constructor instead of init(). There’s nothing to stop you. But you shouldn’t. The original reason for init() was that ancient versions of Java couldn’t dynamically invoke constructors with arguments, so there was no way to give the constructur a ServletConfig. That no longer applies, but servlet containers still … Read more

Is JSP Technology Extensible

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YES. JSP technology is extensible through the development of custom actions, or tags, which are encapsulated in tag libraries. Yes, JavaServer Pages (JSP) technology is extensible. JSP allows developers to create custom tags, known as JSP custom tags or simply custom tags, to encapsulate reusable functionality. This extensibility enables developers to extend the standard JSP … Read more