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
}
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!")
}));
}