Java tutorial
/* * Copyright (C) 2015-2017 PRIS Quentin * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ package org.phoenicis.javafx; import org.phoenicis.scripts.ui.UiMessageSender; import javafx.application.Platform; import org.apache.commons.lang.mutable.MutableObject; import java.util.concurrent.CountDownLatch; import java.util.function.Supplier; public class UiMessageSenderJavaFXImplementation implements UiMessageSender { @Override public <R> R run(Supplier<R> function) { // runBackground synchronously on JavaFX thread if (Platform.isFxApplicationThread()) { return function.get(); } // queue on JavaFX thread and wait for completion final CountDownLatch doneLatch = new CountDownLatch(1); final MutableObject result = new MutableObject(); Platform.runLater(() -> { try { result.setValue(function.get()); } finally { doneLatch.countDown(); } }); try { doneLatch.await(); } catch (InterruptedException e) { // ignore exception } return (R) result.getValue(); } }