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I want to learn web programming with Java. I'm using eclipse neon with tomcat 8.5.13. My question is do these tools support asynchronous programming and server push technologies or should I use other tools?
Thanks
Thanks
I downloaded Netty and tried to run an example. So I created a project with the code below(got it from here):DrZoidberg said:There is a simple async API built into Java in the form of AsynchronousSocketChannel and AsynchronousServerSocketChannel. Those are already sufficient to implement server push. But there are also more full featured libraries like e.g. Netty.
//package io.netty.example.discard;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
/**
* Handles a server-side channel.
*/
public class DiscardServerHandler extends ChannelInboundHandlerAdapter { // (1)
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) { // (2)
// Discard the received data silently.
((ByteBuf) msg).release(); // (3)
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) { // (4)
// Close the connection when an exception is raised.
cause.printStackTrace();
ctx.close();
}
}
HTTP Status 404 – Not Found
Type Status Report
Description The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.
Apache Tomcat/8.5.13
The declared package "io.netty.example.discard" does not match the expected package ""
and it worked fine. There must be some error in your tomcat configuration.java -cp .;"E:\netty-4.1.9.Final\jar\all-in-one\netty-all-4.1.9.Final.jar" io.netty.example.discard.DiscardServer
Asynchronous web programming is a programming technique where multiple tasks can be executed simultaneously without waiting for the previous task to finish. This allows for better performance and user experience, as the program can continue to run while waiting for certain tasks to complete.
Java is a popular language for asynchronous web programming because it is a robust and scalable language that can handle multiple tasks and processes efficiently. It also has a large community and a vast array of libraries and frameworks that support asynchronous programming.
One of the main benefits of using asynchronous web programming in Java is improved performance. By allowing tasks to run simultaneously, the program can handle a higher volume of requests and process them more efficiently. This can also lead to a better user experience, as the program can continue to run and respond to user input while completing other tasks.
Some common challenges in asynchronous web programming using Java include managing the flow of data between tasks, handling errors and exceptions, and debugging asynchrony-related issues. It is also important to properly handle thread management and synchronization to avoid potential issues such as race conditions.
There are many resources available to learn about asynchronous web programming using Java, including online tutorials, books, and courses. It is also helpful to practice and experiment with different techniques and frameworks to gain hands-on experience. Additionally, joining online communities or attending meetups and conferences can provide valuable insights and networking opportunities.