GWTCon 2015 Keynote

7/24/2019 GWTCon 2015 Keynote

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C

GWTCon 2015 Keynote

11/11/2015

+JulienD@jDrama
https://twitter.com/jDramaixhttp://plus.google.com/+JulienDramaix


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Last Year at GWTCon...


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Interop with JavaScript

Compile

Web componentssupport

Java8 support

Google Closure Style

Source mapping IDE integr

many more


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Progress since last ye


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Compile


Java8 support



many more


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GSS: status

Stable and not experimental anymore.


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GSS: status

Stable and not experimental anymore.Used in production at Google.


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GSS: status

Stable and not experimental anymore.Used in production at Google.Old CssResource deprecated


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GSS: status


Not turned on by default.


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GSS: status


Not turned on by default.Simpler and smoother transition to GWT 2.8!


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GSS: status


Used in production at Google.Old CssResource deprecated


Improve CSS of your application


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GSS: status




Improve CSS of your applicationDetect css errors sooner and reduce the size of your application CSS.


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GSS: status




Improve CSS of your applicationDetect css errors sooner and reduce the size of your application CSS.

You need to migrate now!


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GSS: GWT 2.8 new features

For loop@for$i from1to 12{

.col-$i {

width:mult(100%,divide($i,12));

}

@for$j from1to $i {

.col-$i .col-$j {

width:mult(100%,divide($j,$i));

}

}

}


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For loop@for$i from1to 12{

.col-$i {

width:mult(100%,divide($i,12));

}

@for$j from1to $i {

.col-$i .col-$j {

width:mult(100%,divide($j,$i));

}

}

}

generates

.col-1{ width:8.333333%}

.col-1.col-1{ width:100%}

.col-2{ width:16.666667%}



.col-3{ width:25%}

.col-3.col-1{ width:33.333333%}

...


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concat() function@defHOST foo.bar.com

.img {

background-image:url(

concat('//',HOST,'/image.png')

);

}


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concat() function

@defHOST foo.bar.com

.img {

background-image:url(

concat('//',HOST,'/image.png')

);

}

.img {

background-image:url('//foo.ba

}


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@gen-webkit-keyframes annotation/* @gen-webkit-keyframes */

@keyframesmyframe {

from{

top:0px;

}

to{

top:200px; }

}


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@gen-webkit-keyframes annotation/* @gen-webkit-keyframes */

@keyframesmyframe {

from{

top:0px;

}

to{

top:200px; }

}

generates

@keyframesmyframe {

0%{ top:0

}

to{

top:200px

}

}

@-webkit-keyframesm

0%{ top:0

}

to{

top:200px

}

}


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Compile


Java8 support



many more


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Compile


Java8 support



many more


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Faster super dev mode with Incremental compilati

6-7x faster for average app.


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Faster super dev mode.

Speedup of 6-7x for average app!

100% of GWT apps at Google use SDM with incremecompilation!If you have opted out, its time to use it.


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Production compilation improved

Compilation speed improvement: 20% faster for bigapplication.


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Production compilation improved

Compilation speed improvement: 20% faster for bigapplication.

More optimal and smaller code.


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Compile


Java8 support



many more


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Compile


Java8 support



many more


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JsInterop: New simpler specification


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packagefoo;

@JsType

publicclassBar{

publicbooleanbool=true;

publicBar(){}

publicStringfoo(){return"Hello GWTCon!";}

}

Java

Expose your ObJavaScript wor


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packagefoo;

@JsType

publicclassBar{

publicbooleanbool=true;

publicBar(){}

publicStringfoo(){return"Hello GWTCon!";}

}

varbar =newfoo.Bar();

if(bar.bool){

alert(bar.foo());

}

JavaScript

Expose your ObJavaScript wor

JavaScript canAPI of exposed

Java


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@JsType(isNative =true)

publicabstractclassJQuery{@JsMethod(namespace=GLOBAL)

publicnativestaticJQuery$(Stringselector);

publicnativeJQuerycss(Stringprop,Stringval);

publicnativeJQueryattr(Stringname,Stringval);

}

Java

Use native JsTyexisting JavaSc


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@JsType(isNative =true)

publicabstractclassJQuery{@JsMethod(namespace=GLOBAL)

publicnativestaticJQuery$(Stringselector);

publicnativeJQuerycss(Stringprop,Stringval);

publicnativeJQueryattr(Stringname,Stringval);

}

importstaticjquery.JQuery.$;

// ...

$("ul > li").css("color","red").attr("data-level","first");

Java

Java

Use native JsTyexisting JavaSc

Use it like Java


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Want to know more ?

I t ith J S i t


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Compile


Java8 support



many more

I t ith J S i t


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Compile


Java8 support



many more

I t ith J S i t


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Compile


Java8 support



many more

Interop ith Ja aScript


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Compile


Java8 support



many more



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Compile


Java8 support



many more



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Compile


Java8 support



many more



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Compile


Java8 support



many more


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Compile


Java8 support



many more



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Compile


Java8 support



many more


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Runtime performance improved

HashMapPut operations are 2.8x faster.

LongDivision are 5x faster.

Double/Boolean are not boxed anymore.


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Generic Accessor for GWT Properties

Access any cbinding propetime.

if("true".equals(System.getProperty("foo.bar")) &&"ie8".equals(System.getProperty("user.agent"))){

// do something

}

.gwt.xml

java


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GWT 2.8


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GWT 2.8 Beta release


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GWT 2.8 Beta releasePlease test and report bugs


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GWT 2.8 Beta releasePlease test and report bugsEspecially for JsInterop!


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Expect Official release

month if everything looks


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The future


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GWT has a lot of burde


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GWT is...

10 years old

GWT i


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GWT is...

10 years oldDecisions made at that time are not longer ideal

GWT i


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GWT is...


doing too much

GWT i


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GWT is...


doing too muchPermutations, generators, optimisations, changed file tracking, servlet hosting, custom terunner, dependency injection, huge library space

GWT i


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GWT is...

10 years oldDecisions made at that time are no longer ideal

doing too muchPermutations, generators, optimisations, changed file tracking, servlet hosting, custom terunner, dependency injection, huge library space

Others actors of the development stack can nowmanage these responsibilities.


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GWT is loved for itsperformance but hated f

development slownes


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Google is developing a

Java-to-JavaScript trans


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J2CLpronounced Jackal


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J2CLpronounced Jackal

"Canis mesom

Licensed und

J2CL is


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J2CL is...

source to source transpiler,Takes Java 8 code as input and outputs readable ECMAScript 6 with JsDoc Closure style

targeting Modern Js features,

blazing fast,

fully integrated with Closure compiler.Optimizations will be made by Closure compiler.

J2CL is


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notan optimizer or linker,Rely on Closure compiler.

nota dependency injector,Rely on user land (Dagger2, )

notproprietary generators,Rely on APT

nota web toolkit,Rely on JsInterop and third-party libraries

J2CL is...


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No roadmap available y


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Dont take it wrong:GWT is not dead!


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GWT is a mature framew


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GWT 2.8 will be a lonmaintenance release


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GWT 3.0: What, When, H


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GWT 3.0: What, When, HWe dont know yet.


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GWT can still survive tonext 10 years.


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How to prepare your app

the future?


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Use JsInterop instead

JSNI/JSO


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Use APT instead of GW

generators.


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Use Dagger instead Gin/G


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Use modern framework in

of classic gwt libs.


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THANKYOU

+JulienD@jDrama
http://plus.google.com/+JulienDramaixhttps://twitter.com/jDramaixhttp://plus.google.com/+JulienDramaix


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QUESTIONS ?

+JulienD@jDrama
http://plus.google.com/+JulienDramaixhttps://twitter.com/jDramaixhttp://plus.google.com/+JulienDramaix

GWTCon 2015 Keynote

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