pekko/akka-docs/rst/java/code/docs/http/javadsl/server/HighLevelServerExample.java

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Java

/*
* Copyright (C) 2009-2016 Lightbend Inc. <http://www.lightbend.com>
*/
package docs.http.javadsl.server;
//#high-level-server-example
import akka.actor.ActorSystem;
import akka.http.javadsl.model.ContentTypes;
import akka.http.javadsl.model.MediaTypes;
import akka.http.javadsl.server.*;
import akka.http.javadsl.server.values.Parameters;
import java.io.IOException;
public class HighLevelServerExample extends HttpApp {
public static void main(String[] args) throws IOException {
// boot up server using the route as defined below
ActorSystem system = ActorSystem.create();
// HttpApp.bindRoute expects a route being provided by HttpApp.createRoute
new HighLevelServerExample().bindRoute("localhost", 8080, system);
System.out.println("Type RETURN to exit");
System.in.read();
system.terminate();
}
// A RequestVal is a type-safe representation of some aspect of the request.
// In this case it represents the `name` URI parameter of type String.
private RequestVal<String> name = Parameters.stringValue("name").withDefault("Mister X");
@Override
public Route createRoute() {
// This handler generates responses to `/hello?name=XXX` requests
Route helloRoute =
handleWith1(name,
// in Java 8 the following becomes simply
// (ctx, name) -> ctx.complete("Hello " + name + "!")
new Handler1<String>() {
@Override
public RouteResult apply(RequestContext ctx, String name) {
return ctx.complete("Hello " + name + "!");
}
});
return
// here the complete behavior for this server is defined
route(
// only handle GET requests
get(
// matches the empty path
pathSingleSlash().route(
// return a constant string with a certain content type
complete(ContentTypes.TEXT_HTML_UTF8,
"<html><body>Hello world!</body></html>")
),
path("ping").route(
// return a simple `text/plain` response
complete("PONG!")
),
path("hello").route(
// uses the route defined above
helloRoute
)
)
);
}
}
//#high-level-server-example