Event driven web applications in Java?

Question

Is it correct to assume that event driven web applications are currently not practical in Java, or is there a framework or techniques that make this practical in java.

It seems to me that it is not possible, but maybe I am missing something.

• JDBC drivers (and JDBC itself) assume thread based/blocking interactions.
• Jetty/Tomcat and other app servers assume Servlets block until the results are ready.

I know Cassandra has "execAsync()" modes, which is promising, but over all it seems like an uphill (impractical) proposition.

Answer 1

This question is very similar to: Nonblocking io webserver/framework for java

Some options are:

• Grizzly
• Deft

These solutions are based off the NIO functionality add in Java 1.4