コード例 #1
0
    public void run(final Materializer mat)
        throws TimeoutException, InterruptedException, ExecutionException {
      // #backpressure-by-readline
      final CompletionStage<Done> completion =
          Source.from(Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10))
              .map(
                  i -> {
                    System.out.println("map => " + i);
                    return i;
                  })
              .runForeach(
                  i ->
                      System.console()
                          .readLine("Element = %s continue reading? [press enter]\n", i),
                  mat);

      completion.toCompletableFuture().get(1, TimeUnit.SECONDS);
      // #backpressure-by-readline
    }
コード例 #2
0
  abstract static class Model {
    // #model
    public static class Author {
      public final String handle;

      public Author(String handle) {
        this.handle = handle;
      }

      // ...

      // #model

      @Override
      public String toString() {
        return "Author(" + handle + ")";
      }

      @Override
      public boolean equals(Object o) {
        if (this == o) {
          return true;
        }
        if (o == null || getClass() != o.getClass()) {
          return false;
        }

        Author author = (Author) o;

        if (handle != null ? !handle.equals(author.handle) : author.handle != null) {
          return false;
        }

        return true;
      }

      @Override
      public int hashCode() {
        return handle != null ? handle.hashCode() : 0;
      }
      // #model
    }
    // #model

    // #model

    public static class Hashtag {
      public final String name;

      public Hashtag(String name) {
        this.name = name;
      }

      // ...
      // #model

      @Override
      public int hashCode() {
        return name.hashCode();
      }

      @Override
      public boolean equals(Object obj) {
        if (this == obj) return true;
        if (obj == null) return false;
        if (getClass() != obj.getClass()) return false;
        Hashtag other = (Hashtag) obj;
        return name.equals(other.name);
      }

      @Override
      public String toString() {
        return "Hashtag(" + name + ")";
      }
      // #model
    }
    // #model

    // #model

    public static class Tweet {
      public final Author author;
      public final long timestamp;
      public final String body;

      public Tweet(Author author, long timestamp, String body) {
        this.author = author;
        this.timestamp = timestamp;
        this.body = body;
      }

      public Set<Hashtag> hashtags() {
        return Arrays.asList(body.split(" "))
            .stream()
            .filter(a -> a.startsWith("#"))
            .map(a -> new Hashtag(a))
            .collect(Collectors.toSet());
      }

      // ...
      // #model

      @Override
      public String toString() {
        return "Tweet(" + author + "," + timestamp + "," + body + ")";
      }

      // #model
    }
    // #model

    // #model

    public static final Hashtag AKKA = new Hashtag("#akka");
    // #model

    public static final Source<Tweet, NotUsed> tweets =
        Source.from(
            Arrays.asList(
                new Tweet[] {
                  new Tweet(new Author("rolandkuhn"), System.currentTimeMillis(), "#akka rocks!"),
                  new Tweet(new Author("patriknw"), System.currentTimeMillis(), "#akka !"),
                  new Tweet(new Author("bantonsson"), System.currentTimeMillis(), "#akka !"),
                  new Tweet(new Author("drewhk"), System.currentTimeMillis(), "#akka !"),
                  new Tweet(
                      new Author("ktosopl"), System.currentTimeMillis(), "#akka on the rocks!"),
                  new Tweet(new Author("mmartynas"), System.currentTimeMillis(), "wow #akka !"),
                  new Tweet(new Author("akkateam"), System.currentTimeMillis(), "#akka rocks!"),
                  new Tweet(new Author("bananaman"), System.currentTimeMillis(), "#bananas rock!"),
                  new Tweet(new Author("appleman"), System.currentTimeMillis(), "#apples rock!"),
                  new Tweet(
                      new Author("drama"),
                      System.currentTimeMillis(),
                      "we compared #apples to #oranges!")
                }));
  }