jrudolph / Pooling-web-server

A simple pooling webserver
==========================

Features:
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 * Pooling using java.util.concurrent.Executor
 * Static file serving
 * Http Keep-alive handling
 * Experimental implementation using pooling and nio

Architecture:
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This contains two implementations of a pooling webserver:

SimplePooledWebServer:
The main thread waits and accepts connections and then schedules processing of
the connection with the executor. If keep-alive is enabled the thread keeps waiting
for requests for a certain time.

NioPooledWebServer:
NioPooledWebServer is an experimental implementation, which uses java.nio to manage the currently idle
keep-alive connections along with new connections in the main thread. See the source code for more explanation
how this works.

Classes:
--------
SimplePooledWebServer - The main class accepting connections and scheduling processing of requests
Settings - Global configuration
Handler - An abstraction of a component handling incoming requests in their own thread.
HttpHandler - An abstract handler doing basic Http Request/Response handling
StaticHttpFileHandler - A HttpHandler serving static files from the file-system
PingHandler - An example handler echoing requests directly back to the client

NioPooledWebServer - A more sophisticated web server using both pools and java.nio to 
                     manage keep-alive connections in the main thread.

Notes:
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This is a proof of concept of a pooling web server. The real work is finding out the best settings
for pooling and timeouts. 

In a productive environment you would probably use existing solutions for pooling and socket handling. E.g.
the Jetty webserver or Apache MINA.

Run
---
With Maven installed, use `mvn exec:java` to run the simple webserver. Edit the pom.xml if you want to run the
Nio-version.