java-tutorials/play-framework/introduction/app/controllers/HomeController.java

69 lines
1.9 KiB
Java
Raw Normal View History

package controllers;
import play.libs.concurrent.HttpExecutionContext;
import play.mvc.*;
import play.twirl.api.Html;
import javax.inject.Inject;
import java.util.concurrent.CompletionStage;
import static java.util.concurrent.CompletableFuture.supplyAsync;
/**
* This controller contains an action to handle HTTP requests
* to the application's home page.
*/
public class HomeController extends Controller {
private HttpExecutionContext ec;
@Inject
public HomeController(HttpExecutionContext ec) {
this.ec = ec;
}
/**
* An action that renders an HTML page with a welcome message.
* The configuration in the <code>routes</code> file means that
* this method will be called when the application receives a
* <code>GET</code> request with a path of <code>/</code>.
*/
public Result index() {
return ok(views.html.index.render());
}
public Result applyHtml() {
return ok(Html.apply("<h1>This text will appear as a heading 1</h1>"));
}
public Result badRequestPage() {
return badRequest("Your request data has issues.");
}
public Result notFoundPage() {
return notFound("Could not find the page you requested.");
}
public Result customContentType() {
return ok("This is some text content").as("text/html");
}
public CompletionStage<Result> asyncOperation() {
return supplyAsync(() -> {
return longRunningTask();
}, ec.current())
.thenApplyAsync(s -> {
return ok("Got result -> " + s);
}, ec.current());
}
private String longRunningTask() {
return "Long running task has completed";
}
public Result setHeaders() {
return ok("This is some text content")
.as("text/html")
.withHeader("Header-Key", "Some value");
}
}