ErrorHandler.java

package tmp;

import play.http.HttpErrorHandler;
import play.mvc.*;
import play.mvc.Http.*;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;
import javax.inject.Singleton;

@Singleton
public class ErrorHandler implements HttpErrorHandler {
	public CompletionStage<Result> onClientError(RequestHeader request, int statusCode, String message) {
		System.err.println("message " + message);

		return CompletableFuture.completedFuture(
				Results.status(statusCode, "A client error occurred: " + message)
		);
	}

	public CompletionStage<Result> onServerError(RequestHeader request, Throwable exception) {
		System.err.println("message " + exception.getMessage());

		return CompletableFuture.completedFuture(
				Results.internalServerError("A server error occurred: " + exception.getMessage())
		);
	}
}