| Re: [orion-dev] server architecture |
| You don't need the entire set of Restlet bundles. You must have the following bundles: org.restlet.jar 664K org.restlet.ext.servlet.jar 25K org.eclipselabs.restlet.jar 4K org.eclipselabs.restlet.servlet.jar 8K for a total of 701K. Restlet provides a very simple way to create resources, and handle representations such as XML, JSON, and handle security. Here's an example resource that interfaces to MongoDB using the URI pattern http://host:port/{database}/{collection} public class MongoResource extends ServerResource { @Get public JSONObject getJSON() throws MongoException, UnknownHostException { DBCollection collection = getCollection(); DBObject dbObject = collection.findOne(new BasicDBObject("_id", new ObjectId((String) getRequestAttributes().get("id")))); if (dbObject != null) return new JSONObject(dbObject.toMap()); else { getResponse().setStatus(Status.CLIENT_ERROR_NOT_FOUND); return null; } } @Post public String add(JsonRepresentation representation) throws JSONException, UnknownHostException { JSONObject json = representation.getJsonObject(); DBCollection collection = getCollection(); DBObject dbObject = (DBObject) JSON.parse(json.toString()); collection.insert(dbObject); return getReference().toString() + dbObject.get("_id").toString(); } @Put public void update(JsonRepresentation representation) throws JSONException, UnknownHostException { JSONObject json = representation.getJsonObject(); DBCollection collection = getCollection(); DBObject dbObject = (DBObject) JSON.parse(json.toString()); if (collection.findAndModify(new BasicDBObject("_id", new ObjectId((String) getRequestAttributes().get("id"))), dbObject) == null) getResponse().setStatus(Status.CLIENT_ERROR_NOT_FOUND); } @Delete public void remove() throws UnknownHostException { DBCollection collection = getCollection(); collection.remove(new BasicDBObject("_id", new ObjectId((String) getRequestAttributes().get("id")))); } private DBCollection getCollection() throws UnknownHostException { IMongoDB mongoDB = Activator.getInstance().getMongoDB(); Mongo mongo = mongoDB.getMongo(new MongoURI("mongodb://localhost")); DB db = mongo.getDB((String) getRequestAttributes().get("database")); DBCollection collection = db.getCollection((String) getRequestAttributes().get("collection")); return collection; } } The only other piece of code you have to write is the provider to register the resource: public class MongoResourceProvider implements IResourceProvider { @Override public String getApplicationAlias() { return "/"; } @Override public String[] getPaths() { return new String[] { "/mongo/{database}/{collection}/", "/mongo/{database}/{collection}/{id}" }; } @Override public Finder getFinder() { return finder; } private Finder finder = new Finder(null, MongoResource.class);; } The code fully supports hot-swap, so the bundle providing the resource can be updated live. Bryan On Feb 2, 2011, at 10:32 AM, John Arthorne wrote: We have been trying to keep the initial server implementation minimal and avoid too many technology dependencies. What's the big advantage of restlet over servlets? I just glanced at the download for restlet and it seems to be 20MB, which is bigger than our entire M5 download at the moment. I'm somewhat skeptical that something so big could indeed simplify our server, but I'm open to looking at it. |