Weekly Challenge #10
The Weekly Programming Challenge : http://weblog.jamisbuck.org/2016/10/1/weekly-programming-challenge-10.html
Installation
Requires Leiningen to build:
lein uberjasrUsage
To start the server:
$ java -jar target/uberjar/weekly-ten-0.1.0-SNAPSHOT-standalone.jar --server <port>
To launch a client that will send a query to the server:
$ java -jar target/uberjar/weekly-ten-0.1.0-SNAPSHOT-standalone.jar --client <host> <port> <query>
The query engine is really simple - it simply returns the query reversed.
The Phteven Variant
$ java -jar target/uberjar/weekly-ten-0.1.0-SNAPSHOT-standalone.jar --pherver <port>
This starts a server that will delegate queries to Phteven.IO :-)
Use it like so:
$ java -jar target/uberjar/weekly-ten-0.1.0-SNAPSHOT-standalone.jar --client <host> <port> "Hello, Steven" > Querying server localhost:9999 : Hello, Steven => > Hello, Phteven
Design
The server is built in a way that allows a custom ‘handler’ to be defined. When launching from the command-line the simple-protocol-handler is used.
The server uses good old threads to support multiple concurrent clients.
The simple-protocol-handler defines the protocol described in the challenge.
The server can be started in embedded mode like so:
(weekly-ten.server/start-server handler-function port)where the handler-function is a function that takes two parameters: a java.io.InputStream (for reading from the client) and a java.io.OutputStream (for writing to the client). The accepting connections, managing resources etc. is handled outside of this.
So - in theory - implementing the HTTP server should be possible by simple adding another “handler function”.
Due to lack of time I decided to skip the HTTP client/server challenge. Instead I decided to implement a simple HTTP POST client, and to implement a query-handler that send the query to Phteven.IO to get a phtevenized response :-).
Bugs
Most likely.
License
Copyright © 2016
Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.