Tapestry 5: Java Power, Scripting Ease

Tapestry Templates Login.tml <html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_1_0.xsd"> <body> <h1>Please Login</h1> Login <t:form> <t:label for="userId"/> <t:textfield value="userId"/> <br/> form <t:label for="password"/> <t:passwordfield value="password"/> <br/> label <input type="submit" value="Login"/> </t:form> </html> textﬁeld label passwordﬁeld 12 © 2009 Howard M. Lewis Ship

Page Classes Login.tml <html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_1_0.xsd"> <body> <h1>Please Login</h1> Login.java <t:form> <t:label for="userId"/> public class Login <t:textfield value="userId"/> { <br/> @Property <t:label for="password"/> private String userId; <t:passwordfield value="password"/> <br/> @Property <input type="submit" value="Login"/> private String password; </t:form> </html> Object onSuccess() { … } } 13 © 2009 Howard M. Lewis Ship

Page Flows Login.java UserProﬁle.java public class Login public class UserProfile { { @Property … private String userId; } @Property private String password; void onValidate() { … } Object onSuccess() { … return UserProfile.class; } } 14 © 2009 Howard M. Lewis Ship

Inversion of Control Login.java public class Login Your code { @Property private String userId; @Property private String password; … Inject IoC @Inject Service private Session session; into ﬁeld @CommitAfter Object onSuccess() { … User user = (User) session. … user.setLastLogin(new Date()); } } return UserProfile.class; Tapestry Services 15 © 2009 Howard M. Lewis Ship

Meta-Programming Login.java public class Login Generate getter & setter { @Property private String userId; @Property private String password; @InjectPage private UserProfile userProfilePage; … @Inject private Session session; Commit Hibernate transaction @CommitAfter Object onSuccess() { … User user = (User) session. … user.setLastLogin(new Date()); return userProfilePage; } } 16 © 2009 Howard M. Lewis Ship

State Management UserProﬁle.java public class UserProfile { Shared global value (any page) @Property @SessionState This page only private UserEntity user; @Property @Persist private Date searchStart; } 17 © 2009 Howard M. Lewis Ship

❝Most software today is very much like an Egyptian pyramid with millions of bricks piled on top of each other, with no structural integrity, but just done by brute force and thousands of slaves.❞ Alan Kay, co-designer of the Smalltalk programming language 19 © 2009 Howard M. Lewis Ship

BoardGame.java @Entity public class BoardGame { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @NonVisual private long id; @Validate("required") private String title; private String creator; private String publisher; private Date published; private boolean inPrint; @Validate("required") @Column(nullable = false) private Genre genre; @Validate("required") @Column(nullable = false) private Theme theme; @Validate("min=1") private Integer minPlayers; @Validate("min=1") private Integer maxPlayers; @Validate("min=1,max=5") private Integer rating; @DataType("longtext") private String notes; 27 © 2009 Howard M. Lewis Ship

❝PHP and Rails have taught us that development speed is more important than we thought it was ... you really don’t understand a feature till you’ve built it, so the faster you can build them the faster you understand them.❞ Tim Bray, Director of Web Technologies, Sun Microsystems 32 © 2009 Howard M. Lewis Ship

Index_de.properties page-title=Erstellen Sie eine neue Brettspiel add-game=Spiel hinzufŸgen modern=Modernen Index.tml medieval=Mittelalter bible=Bibel <html t:type="layout" title="message:page-title" abstract=Zusammenfassung xmlns:t="http://tapestry.apache.org/schema/tapestry_5_1_0.xsd" xmlns:p="tapestry:parameter"> war_game=Kriegsspiel card=Karte <t:beaneditform submitlabel="message:add-game" object="game"/> role_playing=Rollenspiele </html> cooperative=Genossenschaft creator-label=Schšpfer publisher-label=Verlag published-label=Veršffentlicht inprint-label=Im Druck theme-label=Thema minplayers-label=Mindest-Spieler maxplayers-label=Maximale Spieler notes-label=Notation 35 © 2009 Howard M. Lewis Ship

Nested Components Layout title : String Layout.tml pageNames : List pageName : String <html xmlns="http://www.w3.org/1999/xhtml" xmlns:t="http://tapestry.apache.org/schema/tapestry_5_1_0.xsd" xmlns:p="tapestry:parameter"> <head> <title>${title}</title> </head> <body> … <div id="menu"> <ul> <li t:type="loop" source="pageNames" value="pageName" class="prop:classForPageName"> <t:pagelink page="prop:pageName">${pageName}</t:pagelink> Index </li> </ul> </div> Layout … Loop PageLink 37 © 2009 Howard M. Lewis Ship

Component Parameters Layout.java public class Layout { /** The page title, for the <title> element and the <h1> element. */ @Property @Parameter(required = true, defaultPrefix = BindingConstants.LITERAL) private String title; @Property @Parameter(defaultPrefix = BindingConstants.LITERAL) private String sidebarTitle; @Property @Parameter(defaultPrefix = BindingConstants.LITERAL) private Block sidebar; @Property private String pageName; 38 © 2009 Howard M. Lewis Ship

Non-Template Components OutputDate.java public class OutputDate { private final DateFormat formatter = DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.MEDIUM); @Parameter(required = true, allowNull = false) private Date date; void beginRender(MarkupWriter writer) { writer.write(formatter.format(date)); } } 39 © 2009 Howard M. Lewis Ship

Image Credits © 2006 Chris Walton http://www.flickr.com/photos/philocrites/245011706/ © 2009 Nataline Fung http://www.flickr.com/photos/metaphora/3384569933/ © 2006 Martino Sabia http://www.flickr.com/photos/ezu/297634534/ © 2008 Alan Grinberg http://www.flickr.com/photos/agrinberg/2465119180/ © 2008 Manu Gómez http://www.flickr.com/photos/manugomi/2884678938/ © 2006 Tom Magliery http://www.flickr.com/photos/mag3737/267638148/ © 2003 A. Lipson http://www.andrewlipson.com/escher/relativity.html © 2009 viernest http://www.flickr.com/photos/viernest/3380560365/ © 2007 Jojo Cence http://www.flickr.com/photos/jojocence/1372693375/ © 2007 Patrick Dirden http://www.flickr.com/photos/sp8254/2052236004/ © 2009 Dani Ihtatho http://www.flickr.com/photos/ihtatho/627226315/ 62 © 2009 Howard M. Lewis Ship

Image Credits © 2008 Christophe Delaere http://www.flickr.com/photos/delaere/2514143242/ © 2007 Marina Campos Vinhal http://www.flickr.com/photos/marinacvinhal/379111290/ © 2006 kris247 http://www.flickr.com/photos/kris247/86924080/ 63 © 2009 Howard M. Lewis Ship

Tapestry 5: Java Power, Scripting Ease

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