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Restlet + GWT StockWatcher sample integration
How to host GWT Retrieving JSON Data example on Restlet?
Refer to the followings:
Serving Static Files
Getting Parameter Values
Now here's StockResource.
Code:
import java.util.Random; | |
import org.restlet.data.Form; | |
import org.restlet.data.Parameter; | |
import org.restlet.resource.Get; | |
import org.restlet.resource.ServerResource; | |
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public class StockResource extends ServerResource { | |
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private static final double MAX_PRICE = 100.0; // $100.00 | |
private static final double MAX_PRICE_CHANGE = 0.02; // +/- 2% | |
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@Get | |
public String browse(){ | |
StringBuilder sb = new StringBuilder(); | |
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Random rnd = new Random(); | |
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sb.append('['); | |
Form form = getRequest().getResourceRef().getQueryAsForm(); | |
for (Parameter parameter : form) { | |
if(parameter.getName().equals("q")){ | |
String[] stockSymbols = parameter.getValue().split(" "); | |
for (String stockSymbol : stockSymbols) { | |
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double price = rnd.nextDouble() * MAX_PRICE; | |
double change = price * MAX_PRICE_CHANGE * (rnd.nextDouble() * 2f - 1f); | |
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sb.append(" {"); | |
sb.append(" \"symbol\": \""); | |
sb.append(stockSymbol); | |
sb.append("\","); | |
sb.append(" \"price\": "); | |
sb.append(price); | |
sb.append(','); | |
sb.append(" \"change\": "); | |
sb.append(change); | |
sb.append(" },"); | |
} | |
} | |
} | |
sb.append(']'); | |
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return sb.toString(); | |
} | |
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} |
And Restlet application.
Code:
import org.restlet.Application; | |
import org.restlet.Restlet; | |
import org.restlet.resource.Directory; | |
import org.restlet.routing.Router; | |
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public class MyApplication extends Application { | |
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private static final String ROOT_URI = "file:///PathToGWTWar/"; // e.g. file:///Users/Me/workspace/war | |
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@Override | |
public Restlet createInboundRoot() { | |
Router router = new Router(); | |
// Attach the resource. | |
router.attach("/testFileUpload", MyResource.class); | |
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router.attach("/stockwatcher/stockPrices", StockResource.class); | |
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Directory dir = new Directory(getContext(), ROOT_URI); | |
router.attach("/", dir); | |
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return router; | |
} | |
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} |
In this case, I added to fileUpload sample. And war folder where GWT generates js and other static files is put at ROOT_URI.
The point is the order to attach resources to Router. Try to see what happens when you attach StockResource at last.
As always, Restlet allows us to get a task done easily.
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12.9.2010
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