Downloaded 21 times
![Java vs. Scala DSL public class JavaFXEEDemo extends Application { object ConferenceUI extends JFXApp { val model = ConferenceModel public static void main(String[] args) { stage = new Stage { launch(JavaFXEEDemo.class, args); width = 625 } height = 700 scene = new Scene(new StackPane()) { private SpeakerModel speakerModel = getInstance(); fill = "#fcfcfc" private TextField filter; children = Seq( private ChoiceBox<String> items; new VBox { children = Seq( @Override new ImageView { public void start(Stage primaryStage) { image = new Image(getClass().getResourceAsStream("JavaOneLogo.png")) primaryStage.setTitle("JavaOne Speaker List"); }, speakerModel.load(); new Rectangle { EventHandler<ActionEvent> filterAction = new EventHandler<ActionEvent>() { width = 625 public void handle(ActionEvent event) { height = 50 String field = items.selectionModelProperty().getValue().getSelectedItem(); fill = new LinearGradient( String text = filter.getText(); endX = 0, speakerModel.filter(field, text); stops = Stops(WHITE, "#d0cbc8") } ) }; } primaryStage.setScene(SceneBuilder.create() ) .width(625) }, .height(700) new VBox { .fill(Color.web("#fcfcfc")) padding = Insets(100, 20, 20, 20) .root(StackPaneBuilder.create().children( spacing = 30 // Background image and gradient children = Seq( VBoxBuilder.create().children( new HBox { ImageViewBuilder.create() val filter = new TextField(); 83 Lines 88 Lines .image(new Image(getClass().getResourceAsStream("JavaOneLogo.png"))).build(), val items = new ChoiceBox[ruco.TextField[Speaker]]() { RectangleBuilder.create().width(625).height(50).fill(LinearGradientBuilder.create().endX(0).stops( items = ObservableBuffer(Speaker.firstName, Speaker.lastName, Speaker.jobTitle, Speaker.company) StopBuilder.create().color(Color.WHITE).offset(0).build(), converter = StringConverter.toStringConverter({s:ruco.TextField[Speaker] => s.name}) StopBuilder.create().color(Color.web("#d0cbc8")).offset(1).build() } ).build()).build() alignment = Pos.BASELINE_LEFT ).build(), spacing = 15 // Foreground controls children = Seq( VBoxBuilder.create() items, 2622 Characters 1452 Characters .padding(new Insets(100, 20, 20, 20)) filter, .spacing(30) new Button("Filter") { .children(HBoxBuilder.create() onAction = { e:ActionEvent => .alignment(Pos.BASELINE_LEFT) model.filter(items.selectionModel().getSelectedItem(), filter.text()) .spacing(15) } .children( }, items = new ChoiceBox<String>( new Button("Clear") { FXCollections.observableArrayList(FIRST_NAME, LAST_NAME, JOB_TITLE, COMPANY) onAction = { e:ActionEvent => ), filter.text = "" filter = TextFieldBuilder.create().prefColumnCount(20).onAction(filterAction).build(), model.clear() ButtonBuilder.create().text("Filter").onAction(filterAction).build(), } ButtonBuilder.create().text("Clear").onAction(new EventHandler<ActionEvent>() { }, public void handle(ActionEvent event) { new Button("Reload") { speakerModel.clearFilter(); onAction = { e:ActionEvent => } filter.text = "" }).build(), model.load() ButtonBuilder.create().text("Reload").onAction(new EventHandler<ActionEvent>() { } public void handle(ActionEvent event) { } speakerModel.load(); ) } items.selectionModel().selectFirst() }).build() }, ).build(), new TableView[Speaker](model.filteredSpeakers) { TableViewBuilder.<Speaker>create().items(speakerModel.getFilteredData()).prefHeight(1000).columns( columns = Seq( TableColumnBuilder.<Speaker, String>create() new TableColumn[Speaker, String] { .text(FIRST_NAME) text = "First Name" .cellValueFactory(new PropertyValueFactory<Speaker, String>(FIRST_NAME_FIELD)).build(), converter = {_.firstName()} TableColumnBuilder.<Speaker, String>create() }, .text(LAST_NAME) new TableColumn[Speaker, String] { .cellValueFactory(new PropertyValueFactory<Speaker, String>(LAST_NAME_FIELD)).build(), text = "Last Name" TableColumnBuilder.<Speaker, String>create() converter = {_.lastName()} .text(JOB_TITLE) }, .prefWidth(200) new TableColumn[Speaker, String] { .cellValueFactory(new PropertyValueFactory<Speaker, String>(JOB_TITLE_FIELD)).build(), text = "Job Title" TableColumnBuilder.<Speaker, String>create() converter = {_.jobTitle()} .text(COMPANY) prefWidth = 200 .prefWidth(212) }, .cellValueFactory(new PropertyValueFactory<Speaker, String>(COMPANY_FIELD)).build() new TableColumn[Speaker, String] { ).build() text = "Company" ).build() converter = {_.company()} ).build() prefWidth = 212 ).build() } ); ) items.getSelectionModel().selectFirst(); prefHeight = 1000 primaryStage.show(); } } ) } } ) } onCloseRequest = {_:Any => Platform.exit} } }](https://image.slidesharecdn.com/javafxandscalainthecloud-120714224007-phpapp01/75/JavaFX-and-Scala-in-the-Cloud-17-2048.jpg)
 { columns = Seq( new TableColumn[Speaker, String] { text = "First Name" converter = {_.firstName()} }, new TableColumn[Speaker, String] { text = "Last Name" converter = {_.lastName()} } … ) prefHeight = 1000 }](https://image.slidesharecdn.com/javafxandscalainthecloud-120714224007-phpapp01/75/JavaFX-and-Scala-in-the-Cloud-21-2048.jpg)
![DATABASE By RRZEicons (Own work) [CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons](https://image.slidesharecdn.com/javafxandscalainthecloud-120714224007-phpapp01/75/JavaFX-and-Scala-in-the-Cloud-22-2048.jpg)
![Speaker Domain Object class Speaker extends Record[String, Speaker] { val id = "id".VARCHAR(255).NOT_NULL val company = "company".VARCHAR(255) val firstName = "firstName".VARCHAR(255) val jobTitle = "jobTitle".VARCHAR(255) val lastName = "lastName".VARCHAR(255) def PRIMARY_KEY = id def relation = Speaker } object Speaker extends Speaker with Table[String, Speaker]](https://image.slidesharecdn.com/javafxandscalainthecloud-120714224007-phpapp01/75/JavaFX-and-Scala-in-the-Cloud-26-2048.jpg)
![Query the Database def clear() { val speakers = Speaker.criteria.list() filteredSpeakers.setAll(speakers) } def filter(field: TextField[Speaker], filterString: String) { val speakers = Speaker.criteria.add( field LIKE "%" + filterString + "%").list() filteredSpeakers.setAll(speakers) }](https://image.slidesharecdn.com/javafxandscalainthecloud-120714224007-phpapp01/75/JavaFX-and-Scala-in-the-Cloud-27-2048.jpg)
![Cloud Access in Scala val context = ContextBuilder.newBuilder("aws-s3") .credentials("identity", "secret") .buildView(classOf[BlobStoreContext]) def loadFromCloud(container:String, resource:String):InputStream = { val blobStore = context.getBlobStore val blob = blobStore.getBlob(container, resource) blob.getPayload.getInput } def close() { context.close() }](https://image.slidesharecdn.com/javafxandscalainthecloud-120714224007-phpapp01/75/JavaFX-and-Scala-in-the-Cloud-34-2048.jpg)
Uploaded byStephen Chin
JavaFX and Scala in the Cloud
The document discusses the advantages of cloud data architectures, highlighting features like offline operation, high availability, and cost-effectiveness, particularly for applications with a limited user view of data. It also examines the benefits of using JavaFX and Scala for developing responsive applications, showcasing their integration and support for immersive experiences. Additionally, it introduces the jclouds API for cloud access, emphasizing its portability and compatibility with multiple providers.
JavaFX and Scala in the Cloud
- 1. Stephen Chin |Oracle @steveonjava Andrew Phillips | jclouds @jclouds JavaFX and Scala in the Cloud
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- 3. Heaven Photo by AlbertoFernandez Fernandez
- 6. When This Architecture Makes Sense • Data is mostly read-only – Transactional updates still require a server (but can be simpler/smaller) • User's view of data is small to medium – Initial DB download of < 10K records is reasonable – Not total DB size, but subset of data visible to user Conference App has 3K large records and compresses to only 330KB DB size
- 7. Cloud Data Advantages •Offline Operation – Once DB is cached, application works 100% offline • Responsive Client Performance – All DB queries are fast and local • High Availability & Scalability – 99.99% Availability – Easily scales up to 100s of requests per second But, with proper hashes scales up to millions of requests per second!
- 8. Cloud Data Advantages(continued) • Insanely cheap server costs! Number of Users Monthly Cost* 3,000 Free (S3 free tier) 10,000 $0.28 100,000 $3.84 1,000,000 $39.48 * For 330KB of hosted data in Amazon S3
- 9. Cloud Data Advantages(continued) • Insanely cheap server costs! Number of Users Monthly Cost* 3,000 Free (S3 free tier) 10,000 $0.28 100,000 $3.84 1,000,000 $39.48 * For 330KB of hosted data in Amazon S3
- 10. Cloud Data Advantages(continued) • Insanely cheap server costs! Number of Users Monthly Cost* 3,000 Free (S3 free tier) 10,000 $0.28 100,000 $3.84 1,000,000 $39.48 * For 330KB of hosted data in Amazon S3
- 11. Cloud Data Advantages(continued) • Insanely cheap server costs! Number of Users Monthly Cost* 3,000 Free (S3 free tier) 10,000 $0.28 100,000 $3.84 1,000,000 $39.48 * For 330KB of hosted data in Amazon S3
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- 13. JavaFX 2.0 Platform ImmersiveApplication Experience Leverage your Java skills with modern JavaFX APIs • Cross-platform Animation, Video, Charting • Integrate Java, JavaScript, and HTML5 in the same application • New graphics stack takes advantage of hardware acceleration for 2D and 3D applications • Use your favorite IDE: NetBeans, Eclipse, IntelliJ, etc.
- 14. What is Scala 2001 2006 • Scala Started • Scala v2.0 2003/2004 2011 • Scala v1.0 • Scala 2.9.2 (latest) • Started in 2001 by Martin Odersky • Compiles to Java bytecodes • Pure object-oriented language • Also a functional programming language
- 15. Why Scala? • Sharesmany language features with JavaFX Script that make GUI programming easier: – Static Type Checking – Catch your errors at compile time – Closures – Wrap behavior and pass it by reference – Declarative – Express the UI by describing what it should look like
- 16. Why Scala? (continued) • Scala also supports Type Safe DSLs! – Implicit Conversions – type safe class extension – Operator Overloading – with standard precedence rules – DelayedInit / @specialized – advanced language features
- 17. Java vs. ScalaDSL public class JavaFXEEDemo extends Application { object ConferenceUI extends JFXApp { val model = ConferenceModel public static void main(String[] args) { stage = new Stage { launch(JavaFXEEDemo.class, args); width = 625 } height = 700 scene = new Scene(new StackPane()) { private SpeakerModel speakerModel = getInstance(); fill = "#fcfcfc" private TextField filter; children = Seq( private ChoiceBox<String> items; new VBox { children = Seq( @Override new ImageView { public void start(Stage primaryStage) { image = new Image(getClass().getResourceAsStream("JavaOneLogo.png")) primaryStage.setTitle("JavaOne Speaker List"); }, speakerModel.load(); new Rectangle { EventHandler<ActionEvent> filterAction = new EventHandler<ActionEvent>() { width = 625 public void handle(ActionEvent event) { height = 50 String field = items.selectionModelProperty().getValue().getSelectedItem(); fill = new LinearGradient( String text = filter.getText(); endX = 0, speakerModel.filter(field, text); stops = Stops(WHITE, "#d0cbc8") } ) }; } primaryStage.setScene(SceneBuilder.create() ) .width(625) }, .height(700) new VBox { .fill(Color.web("#fcfcfc")) padding = Insets(100, 20, 20, 20) .root(StackPaneBuilder.create().children( spacing = 30 // Background image and gradient children = Seq( VBoxBuilder.create().children( new HBox { ImageViewBuilder.create() val filter = new TextField(); 83 Lines 88 Lines .image(new Image(getClass().getResourceAsStream("JavaOneLogo.png"))).build(), val items = new ChoiceBox[ruco.TextField[Speaker]]() { RectangleBuilder.create().width(625).height(50).fill(LinearGradientBuilder.create().endX(0).stops( items = ObservableBuffer(Speaker.firstName, Speaker.lastName, Speaker.jobTitle, Speaker.company) StopBuilder.create().color(Color.WHITE).offset(0).build(), converter = StringConverter.toStringConverter({s:ruco.TextField[Speaker] => s.name}) StopBuilder.create().color(Color.web("#d0cbc8")).offset(1).build() } ).build()).build() alignment = Pos.BASELINE_LEFT ).build(), spacing = 15 // Foreground controls children = Seq( VBoxBuilder.create() items, 2622 Characters 1452 Characters .padding(new Insets(100, 20, 20, 20)) filter, .spacing(30) new Button("Filter") { .children(HBoxBuilder.create() onAction = { e:ActionEvent => .alignment(Pos.BASELINE_LEFT) model.filter(items.selectionModel().getSelectedItem(), filter.text()) .spacing(15) } .children( }, items = new ChoiceBox<String>( new Button("Clear") { FXCollections.observableArrayList(FIRST_NAME, LAST_NAME, JOB_TITLE, COMPANY) onAction = { e:ActionEvent => ), filter.text = "" filter = TextFieldBuilder.create().prefColumnCount(20).onAction(filterAction).build(), model.clear() ButtonBuilder.create().text("Filter").onAction(filterAction).build(), } ButtonBuilder.create().text("Clear").onAction(new EventHandler<ActionEvent>() { }, public void handle(ActionEvent event) { new Button("Reload") { speakerModel.clearFilter(); onAction = { e:ActionEvent => } filter.text = "" }).build(), model.load() ButtonBuilder.create().text("Reload").onAction(new EventHandler<ActionEvent>() { } public void handle(ActionEvent event) { } speakerModel.load(); ) } items.selectionModel().selectFirst() }).build() }, ).build(), new TableView[Speaker](model.filteredSpeakers) { TableViewBuilder.<Speaker>create().items(speakerModel.getFilteredData()).prefHeight(1000).columns( columns = Seq( TableColumnBuilder.<Speaker, String>create() new TableColumn[Speaker, String] { .text(FIRST_NAME) text = "First Name" .cellValueFactory(new PropertyValueFactory<Speaker, String>(FIRST_NAME_FIELD)).build(), converter = {_.firstName()} TableColumnBuilder.<Speaker, String>create() }, .text(LAST_NAME) new TableColumn[Speaker, String] { .cellValueFactory(new PropertyValueFactory<Speaker, String>(LAST_NAME_FIELD)).build(), text = "Last Name" TableColumnBuilder.<Speaker, String>create() converter = {_.lastName()} .text(JOB_TITLE) }, .prefWidth(200) new TableColumn[Speaker, String] { .cellValueFactory(new PropertyValueFactory<Speaker, String>(JOB_TITLE_FIELD)).build(), text = "Job Title" TableColumnBuilder.<Speaker, String>create() converter = {_.jobTitle()} .text(COMPANY) prefWidth = 200 .prefWidth(212) }, .cellValueFactory(new PropertyValueFactory<Speaker, String>(COMPANY_FIELD)).build() new TableColumn[Speaker, String] { ).build() text = "Company" ).build() converter = {_.company()} ).build() prefWidth = 212 ).build() } ); ) items.getSelectionModel().selectFirst(); prefHeight = 1000 primaryStage.show(); } } ) } } ) } onCloseRequest = {_:Any => Platform.exit} } }
- 18. ScalaFX Application object ConferenceUIextends JFXApp { val model = ConferenceModel stage = new Stage { width = 625 height = 700 scene = new Scene(new StackPane()) { fill = "#fcfcfc" children = Seq( // create background // create foreground ) } } }
- 19. Loading Images new ImageView{ image = new Image( getClass().getResourceAsStream( "JavaOneLogo.png" ) ) }
- 20. Creating Buttons new Button("Filter"){ onAction = { e:ActionEvent => model.filter(items.selectionModel().getSelectedItem(), filter.text()) } } new Button("Clear") { onAction = { e:ActionEvent => filter.text = "" model.clear() } }
- 21. ScalaFX Table Construction newTableView[Speaker](model.filteredSpeakers) { columns = Seq( new TableColumn[Speaker, String] { text = "First Name" converter = {_.firstName()} }, new TableColumn[Speaker, String] { text = "Last Name" converter = {_.lastName()} } … ) prefHeight = 1000 }
- 22. DATABASE By RRZEicons (Ownwork) [CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
- 23. Java DB /Apache Derby • Embedded Database • Small Footprint (2.7MB) • Standards Based (Java, JDBC, SQL) • Extremely Easy to Configure – With JDBC 4 / SE 6, just drop in the jar!
- 24. Circumflex ORM • Scala-basedORM (Object-Relational Mapping) • SQL-based Query Syntax • DSL for Domain Object Definition • Lazy and Eager Fetch Strategies
- 25. Embedded DB Config orm.connection.driver= org.apache.derby.jdbc.EmbeddedDriver orm.connection.url=jdbc:derby:conferenceData orm.connection.username=user1 orm.connection.password=user1 orm.defaultSchema=APP
- 26. Speaker Domain Object class Speaker extends Record[String, Speaker] { val id = "id".VARCHAR(255).NOT_NULL val company = "company".VARCHAR(255) val firstName = "firstName".VARCHAR(255) val jobTitle = "jobTitle".VARCHAR(255) val lastName = "lastName".VARCHAR(255) def PRIMARY_KEY = id def relation = Speaker } object Speaker extends Speaker with Table[String, Speaker]
- 27. Query the Database defclear() { val speakers = Speaker.criteria.list() filteredSpeakers.setAll(speakers) } def filter(field: TextField[Speaker], filterString: String) { val speakers = Speaker.criteria.add( field LIKE "%" + filterString + "%").list() filteredSpeakers.setAll(speakers) }
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- 29. An OSSM PersistenceStore • On-demand • Self-service • Scalable • Measurable • ™ Dave Nielsen, CloudCamp @jclouds
- 30. open source simple: feelslike java (and clojure)unit testable tested across multiple clouds vibrant community
- 31. Portable APIs BlobStore LoadBalancer What do you Compute want? Provider-Specific Hooks Embeddable github jclouds-examples
- 32. Anatomy of aBlobStore Project 1.Create context 2.Get BlobStore API 3.Do stuff 4.Close context @jclouds
- 33. jclouds modularity APIs aresoftware focused Providers are offering focused API + location + defaults = Provider
- 34. Cloud Access inScala val context = ContextBuilder.newBuilder("aws-s3") .credentials("identity", "secret") .buildView(classOf[BlobStoreContext]) def loadFromCloud(container:String, resource:String):InputStream = { val blobStore = context.getBlobStore val blob = blobStore.getBlob(container, resource) blob.getPayload.getInput } def close() { context.close() }
- 35. Why jclouds? • DataPortability o APIs are not as compatible as they might appear • Code Portability o Currently 33 cloud providers • Enterprise-grade o Move petabytes of data • Parallel operations without threading concerns o Outperforms many native SDKs o GAE compatible o Many tuning options @jclouds
- 36. Why jclouds? • OSGicompatible • Clojure binding • “Invented” many standard SDK features o e.g. sync/async APIs • Tested! o “official” TCK for a number of cloud providers o also supports offline/local testing @jclouds
- 37. Why jclouds? • Locationmetadata o Don’t get locked in to a provider’s deployment policy • Does the hard work so you don’t have to o Multi-part in native SDKs vs. .multipart() in jclouds • Strong & active community o ~65 contributors, commercial support @jclouds
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- 39. Stephen Chin <stephen.chin@oracle.com>| Oracle @steveonjava Andrew Phillips <andrew@jclouds.org> | jclouds @jclouds Thank You!
Editor's Notes
- #18 Stage.add??