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    <title>Java 9: Uma visão geral sobre as novas funcionalidades </title>

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        <!--
          === Title ===============================================================================
        -->

        <section>
            <div style="width: 80%; margin: 0 auto">
                <h1 style="margin: 00px 0 80px 0">Java 9</h1>
                <h5><i> Light Talking:</i></h5>
                <h3 style="text-align: left" class="emphasize">Uma visão geral sobre <br/>as novas funcionalidades</h3>
            </div>
                <div id="helpfooter">
                    <code>?</code> para ajuda, <code>espaço</code> para navegar
                    </p>
                </div>
                <div id="version">
                    2017-03-28
                </div>

                <div class="profile" style="position: absolute; top: 150px; left: 800px">
                    <div class="profile-sidebar">
                        <div class="profile-userpic">
                            <img data-src="presentation/img/logo_sou_java.png" class="img-responsive" alt="">
                        </div>
                        <div class="profile-usertitle">
                            <div class="profile-usertitle-name">
                                SouJava
                            </div>
                            <div class="profile-usertitle-job">
                               Grupo de usuários Java
                            </div>
                        </div>
                    </div>
                    <div class="profile-content">
                        <a href="https://twitter.com/soujava">@soujava</a>
                    </div>
                </div>

                <div id="rightsection">
                    <b>Dica: </b><a  class="c-ref" href="#"><code>arquivo</code></a> e <a href="#" class="jep">JEP</a> são links diretos
                </div>

                <div id="licence">
                    <a rel="license" href="https://creativecommons.org/licenses/by-nc-sa/4.0/">
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                    <br/><span xmlns:dct="http://purl.org/dc/terms/"
                               href="http://purl.org/dc/dcmitype/InteractiveResource"
                               property="dct:title" rel="dct:type">Apresentação do Java 9 e uma visão geral sobre os novos recursos</span>
                    por
                    <a xmlns:cc="http://creativecommons.org/ns#" href="https://twitter.com/soujava"
                       property="cc:attributionName" rel="cc:attributionURL">SouJava</a>
                    <br/>licenciado por 
                    <a rel="license" href="https://creativecommons.org/licenses/by-nc-sa/4.0/">
                        Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.</a>.
                    Baseado em partes do trabalho da <a xmlns:dct="http://purl.org/dc/terms/"
                                                          href="http://lab.hakim.se/reveal-js/" rel="dct:source">Reveal.JS</a>.
                </div>
        </section>


        <!--
          === Overview ============================================================================
        -->


        <section>

            <!--<section>-->
            <!--<h1>Java 9</h1>-->
            <!--<h3>in a nutshell</h3>-->
            <!--</section>-->

            <!--<section>-->
            <div>
                <div data-markdown>
                    ## Especificação
                </div>
                <div style="width: 85%; margin: 0 auto;">
                    <div data-markdown class="twocol">
                        ##### Especificação
                        - **82** JEP targeted
                        - GA Release:   <!-- -->
                        ~~2016-09-22~~ **2017-03-23**
                        - Brewing since: 2014-08-11
                    </div>
                    <div data-markdown class="twocol">
                        ##### Destaques
                        - Jigsaw
                        - Tooling
                        - HTTP API
                        - Detalhes da linguagem
                    </div>
                </div>
            </div>
            <!--</section>-->

        </section>

        <!--
          === Tooling =============================================================================
        -->

        <section>


            <section>

                <div data-markdown>
                    # FERRAMENTAS
                </div>
            </section>


            <section>
                <div data-markdown>
                    <script type="text/template">
                        ### REPL: `jshell`

                        ```
                        ⋊> ~ jshell
                        |  Welcome to JShell -- Version 9-ea
                        |  For an introduction type: /help intro

                        jshell> 3 + 4 * 7
                        $1 ==> 31

                        jshell> int add(int a, int b) {
                        ...>   return a+b;
                        ...> }
                        |  created method add(int,int)

                        jshell> add(25, $1)
                        $3 ==> 56
                        ```
                        <!-- .element: class="small" -->

                        Obtenha uma visão geral com `/help` e  `/help shortcuts`
                    </script>
                </div>
            </section>


            <section>
                <div data-markdown class="container">
                    <script type="text/template">
                        ### HTML5 Javadoc
                        - Habilite via parâmetro `-html5` 
                        - Busca capacitada
                        - HTML5 e Doclet API atualizada
                        - DocLint melhorado: <span>`-Xdoclint/package:java.*,javax.*`</span> <!-- .element: class="small" -->
                    </script>
                </div>
            </section>


            <section>
                <h3>Exemplo de uma busca no HTML5 Javadoc</h3>
                <img src="presentation/img/javadoc-html5-example.png" alt="Example Java 9 Javadoc output with HTML5 enabled">
            </section>


            <section>
                <div data-markdown style="width: 60%; margin: 0 auto">
                    <script type="text/template">
                        ### Cross compiling
                        #### e o `javac -release` flag
                        ````
                        javac - release N
                        ````
                        <!-- .element: class="small" -->

                        ...é equivalente a 

                        ````
                        javac -source N -target N –bootclasspath rtN.jar ...
                        ````
                        <!-- .element: class="small" -->
                    </script>
                </div>
            </section>


        </section>


        <section>


            <section>
                <div class="small">
                    <div data-markdown>
                        ## Detalhes da linguagem
                    </div>

                    <div class="twocol">
                        <div data-markdown>
                            <script type="text/template">
                                ##### Processos de controle [`ControlProcess.java`](https://github.com/soujava/java9-em-acao/blob/master/playground/src/main/java/de/exxcellent/java9/process/ControlProcess.java) <!-- .element: class="c-ref" -->
                                - Recuperação e inspeção de processos
                                - Finalização de processos

                                ##### Coleções[`ImmutableCollections.java`](https://github.com/soujava/java9-em-acao/blob/master/playground/src/main/java/de/exxcellent/java9/collections/ImmutableCollections.java) <!-- .element: class="c-ref" -->
                                ```
                                List/Map/Set.of(1, 2, 3);
                                ```

                                ##### Enhanced Deprecado
                                ````java
                                @Deprecated(since ="1.5", forRemoval = true)
                                ````

                            </script>
                        </div>
                    </div>
                    <div class="twocol" data-markdown>
                        <script type="text/template">
                            ##### Stream
                            ```
                            InputStream.transferTo(OutputStream out);
                            ```

                            ##### StackWalker [`StackWalkerExample.java`](https://github.com/soujava/java9-em-acao/blob/master/playground/src/main/java/de/exxcellent/java9/util/StackWalkerExample.java) <!-- .element: class="c-ref" -->

                            ##### Nome de pacote
                            ````
                            this.getClass().getPackageName()
                            ````
                        </script>
                    </div>
                </div>
            </section>


            <section>
                <div data-markdown>
                    ### Controle de Processo
                    ````java
                    <pre>// Obtendo o próprio PIDs ou de processos já iniciados
                    out.println("Your pid is " + ProcessHandle.current().getPid());

                    Process p = Runtime.getRuntime().exec("sleep 1h");
                    ProcessHandle h = ProcessHandle.of(p.getPid())  // Opcional
                            .orElseThrow(IllegalStateException::new);

                    // Fazendo algo ao sair de um processo        // CompletableFuture
                    h.onExit().thenRun( ()-&gt; out.println("Sleeper exited") );

                    // Pegando informação do processo
                    out.printf("[%d] %s - %s\n", h.getPid(),
                               h.info().user().orElse("unknown"),
                               h.info().commandLine().orElse("none"));

                    // Finalizando o processo
                    h.destroy();</pre>
                    ````
                </div>
            </section>


            <section>
                <div data-markdown>
                    ### Fábricas de coleções imutáveis
                    ````java
                    <pre>/* Seções de comentários iriam quebrar ... */
                    List&lt;Integer&gt; listOfNumbers = List.of(1, 2, 3, 4, 5/*, null*/);

                    Set&lt;Integer&gt; setOfNumbers = Set.of(1, 2, 3, 4, 5/*, 1*/);

                    Map&lt;String, String&gt; mapOfString =
                        Map.of("key1", "value1", "key2", "value2");

                    Map&lt;String, String&gt; moreMapOfString =
                        Map.ofEntries(
                            Map.entry("key1", "value1"),
                            Map.entry("key2", "value2")/*,
                            Map.entry("key1", "value3")*/
                    );
                    ````
                </div>
            </section>


            <section>
                <div data-markdown style="font-size: .92em;">
                    ### StackWalker
                    ````java
                    <pre>// retorno de classe/método somente para nossas classes.
                    private static List&lt;String&gt; walkAndFilterStackframe() {
                      return StackWalker.getInstance().walk(s -&gt;
                        s.map( frame-&gt; frame.getClassName()+"/"+frame.getMethodName())
                               .filter(name -&gt; name.startsWith("de.exxcellent"))
                               .limit(10)
                               .collect(Collectors.toList()) );
                    }</pre>
                    ````
                </div>
            </section>


            <section>
                <div data-markdown>
                    ### Novas Utilidades para o Input Stream
                    ````java
                    <pre>// Todos os bytes de um InputStream de uma só vez
                    byte[] result = new ByteArrayInputStream(buf)
                        .readAllBytes();

                    // Diretamente redirecionado de um InputStream para um OutputStream
                    new ByteArrayInputStream(buf)
                        .transferTo(System.out);</pre>
                    ````
                </div>
            </section>


        </section>


        <section>
            <div data-markdown>
                ### HTTP/2 Client
                ````java
                /**
                 * A API HTTP funciona de forma assíncrona e síncrona. No
                 * modo assíncrono, o trabalho é executado em threads (ExecutorService).
                 */
                public static void main(String[] args) throws Exception {
                  HttpClient.getDefault()
                    .request(URI.create("https://www.exxcellent.de"))
                    .GET()
                    .responseAsync() // CompletableFuture :D
                    .thenAccept(httpResponse ->
                        out.println(httpResponse.body(HttpResponse.asString()))
                    );
                  Thread.sleep(999); // Dê algum tempo para a thread trabalhar.
                }
                ````
            </div>
        </section>


        <!--
          === Details =============================================================================
        -->
        <section>


            <section>
                <div data-markdown>
                    # Jigsaw
                </div>
            </section>


            <section>
                <div data-markdown>
                    <script type="text/template">
                        ## Jigsaw [JEP 201](http://openjdk.java.net/jeps/201)<!-- .element: class="jep" -->

                        > Módulos agrupam um ou mais pacotes
                        > e oferecem um encapsulamento melhor do que jars

                        - Permite **diminuir o tempo de execução de um JAR**  &rarr; IoT
                        - **Ponto forte:** Em um módulo: `public` não permanece público para outros
                        - _Sad:_ Não possui módulo de versão

                    </script>
                </div>
            </section>


            <section>
                <div data-markdown>
                    <script type="text/template">
                        ### Como funciona (1)
                       Aqrquivos `module-info.java` declaram dependências

                        ```java
                        module com.mysql.jdbc {
                            // Dependência de móduolo
                            requires java.sql;

                            // pacote exportado de um módulo
                            exports com.mysql.jdbc;

                            // Implementação de um serviço com instância
                            provides java.sql.Driver with com.mysql.jdbc.Driver;
                        }
                        ```
                    </script>
                </div>
            </section>


            <section>
                <div data-markdown class="container">
                    <script type="text/template">
                        ### Como funciona (2)
                        ##### Alterações do `javac` e `java` para usar módulos ao invés de JARs
                        ````
                        javac -mp modulepath ...
                        java  -mp modulepath -m modulename/moduleclass
                        ````

                        ##### Linker
                        `jlink` pode ser utlizado para unir um conjunto de módulos, juntamente com suas dependências transitivas,
                        para criar uma imagem modular de tempo-execução 

                    </script>
                </div>
            </section>


            <section>
                <div data-markdown >
                    <script type="text/template">
                        ### `ServiceLoader` utilizando módulos (1)
                        ````
                        public abstract class BillingService {

                          public static BillingService getInstance() {
                            // Java SPI to find the instance
                            ServiceLoader<BillingServiceProvider> sl =
                               ServiceLoader.load(BillingServiceProvider.class);

                            // Fetch first provider implementation
                            Iterator<BillingServiceProvider> it = sl.iterator();

                            return it.next().buildBillingService();
                          }

                          public abstract String takeMoney();
                        }
                        ````
                    </script>
                </div>
            </section>


            <section>
                <div data-markdown style="font-size: .9em">
                    <script type="text/template">
                        ### `ServiceLoader` usando módulos (2)
                        ````java
                        module anothermodule {
                          exports de.exxcellent.anothermodule;
                          requires de.exxcellent.java9;

                          // Prover uma instância de serviços(SPI com módulos Jigsaw)
                          provides de.exxcellent.java9.jigsaw.spi.BillingServiceProvider
                          with de.exxcellent.anothermodule.spi.MastercardBillingServiceProvider;
                        }
                        ````
                    </script>
                </div>
            </section>


            <section>
                <div data-markdown>
                    <script type="text/template">
                        ### Como funciona (3)
                        ````
                        $ mkdir -p target/module/de.exxcellent.java9
                        $ mkdir -p target/module/anothermodule

                        $ javac $(find playground/src/main/java -name "*.java") \
                                -d target/module/de.exxcellent.java9
                        $ javac $(find playground-dependent/src/main/java -name "*.java")\
                                -d target/module/anothermodule \
                                -modulepath target/module

                        $ java  -modulepath target/module \
                                -m anothermodule/de.exxcellent.anothermodule.TestJigsawSPI
                        Mastercard billed the money!

                        ````
                    </script>
                </div>
            </section>


            <section>
                <div class="container">
                    <div data-markdown>
                        ### Ferramentas
                        - Lista módulos incorporados: `java –listmods`
                        - Buscando dependências: `jdeps –jdkinternals app.jar`
                    </div>
                    <div data-markdown style="margin-top: 60px">
                        ### Recursos
                        - [Breve resumo da JVM ](http://cr.openjdk.java.net/~mr/jigsaw/ea/module-summary.html)
                        - [O estado do módulo de sistema](http://openjdk.java.net/projects/jigsaw/spec/sotms/)
                    </div>
                </div>
            </section>


        </section>


        <section>
            <section>
                <div class="small">
                    <div data-markdown>
                        ## Muitos Detalhes (obscuros) 
                    </div>

                    <div class="twocol" data-markdown>
                        <script type="text/template">
                            ##### Performance
                            - Melhora nos travamentos [JEP 102](http://openjdk.java.net/jeps/143)<!-- .element: class="jep" -->
                            - Cache de código segmentado [JEP 197](http://openjdk.java.net/jeps/197)<!-- .element: class="jep" -->
                            - Compilação Inteligente do Java [JEP 199](http://openjdk.java.net/jeps/199)<!-- .element: class="jep" -->

                            #####  Logging unificado da JVM
                            - Mesmo logging para _toda_ JVM (GC, ...)
                            [JEP 158](http://openjdk.java.net/jeps/158) <!-- .element: class="jep" -->

                            ##### Coisas obscuras
                            - Controle do Compilador JVM [JEP 165](http://openjdk.java.net/jeps/165)<!-- .element: class="jep" -->
                            - Securança UDP (DTLS) [JEP 219](http://openjdk.java.net/jeps/219)<!-- .element: class="jep" -->
                            - Handles Variáveis [JEP 193](http://openjdk.java.net/jeps/193)<!-- .element: class="jep" -->
                            - Remoção de combinações deprecadas do GC
                            [JEP 214](http://openjdk.java.net/jeps/214) <!-- .element: class="jep" -->
                            - Processamento de instruções de importação de forma correta
                            [JEP 216](http://openjdk.java.net/jeps/216) <!-- .element: class="jep" -->

                        </script>
                    </div>

                    <div class="twocol" data-markdown>
                        <script type="text/template">
                            ##### HTTP 2 Client
                            -  Implementações HTTP/2 e WebSocket
                            [JEP 110](http://openjdk.java.net/jeps/110) <!-- .element: class="jep" -->
                            [`HttpClientExample.java`](https://github.com/soujava/java9-em-acao/blob/master/playground/src/main/java/de/exxcellent/java9/http/HttpClientExample.java) <!-- .element: class="c-ref" -->

                            ##### Fixes / Enhancements
                            - Propriedade de Arquivos UTF-8 
                            [JEP 226](http://openjdk.java.net/jeps/226) <!-- .element: class="jep" -->
                            - Gráficos HiDPI no Windows e Linux
                            [JEP 263](http://openjdk.java.net/jeps/263) <!-- .element: class="jep" -->
                            - Milling Project Coin <span>(5 enhancements)</span> <!-- .element: class="decent small" -->
                            [JEP 213](http://openjdk.java.net/jeps/213) <!-- .element: class="jep" -->
                            - Elide Deprecação de Warnings nas Declarações de Importações
                            [JEP 211](http://openjdk.java.net/jeps/211) <!-- .element: class="jep" -->
                            - Resolve Lint e Doclint Warnings
                            [JEP 212](http://openjdk.java.net/jeps/212) <!-- .element: class="jep" -->
                        </script>
                    </div>

                </div>
            </section>


            <section>
                <div data-markdown>
                    <script type="text/template">
                        #### E muito mais!
      Acesse a lista completa no link http://openjdk.java.net/projects/jdk9/
                    </script>
                </div>
            </section>
        </section>
    </div>
</div>

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