Formatting java codes with sbt-java-formatter.
This commit is contained in:
hepin1989
parent
27500001ea
commit
998c5a9285
401 changed files with 19750 additions and 17450 deletions
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@ -11,9 +11,9 @@ import akka.stream.ActorMaterializer;
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import akka.stream.Materializer;
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import akka.stream.javadsl.Sink;
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import akka.stream.javadsl.Source;
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//#takeLast-operator-example
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// #takeLast-operator-example
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import akka.japi.Pair;
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//#takeLast-operator-example
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// #takeLast-operator-example
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import java.util.*;
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import java.util.concurrent.CompletionStage;
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import java.util.concurrent.ExecutionException;
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@ -21,60 +21,68 @@ import java.util.concurrent.TimeoutException;
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public class SinkDocExamples {
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private final static ActorSystem system = ActorSystem.create("SourceFromExample");
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private final static Materializer materializer = ActorMaterializer.create(system);
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private static final ActorSystem system = ActorSystem.create("SourceFromExample");
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private static final Materializer materializer = ActorMaterializer.create(system);
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static void reduceExample() throws InterruptedException, ExecutionException, TimeoutException {
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static void reduceExample() throws InterruptedException, ExecutionException, TimeoutException {
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//#reduce-operator-example
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Source<Integer, NotUsed> ints = Source.from(Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10));
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CompletionStage<Integer> sum = ints.runWith(Sink.reduce((a, b) -> a + b), materializer);
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sum.thenAccept(System.out::println);
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// 55
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//#reduce-operator-example
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}
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// #reduce-operator-example
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Source<Integer, NotUsed> ints = Source.from(Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10));
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CompletionStage<Integer> sum = ints.runWith(Sink.reduce((a, b) -> a + b), materializer);
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sum.thenAccept(System.out::println);
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// 55
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// #reduce-operator-example
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}
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static void takeLastExample() throws InterruptedException, ExecutionException, TimeoutException {
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//#takeLast-operator-example
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// pair of (Name, GPA)
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List<Pair> sortedStudents = Arrays.asList(new Pair<>("Benita", 2.1), new Pair<>("Adrian", 3.1),
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new Pair<>("Alexis", 4), new Pair<>("Kendra", 4.2), new Pair<>("Jerrie", 4.3), new Pair<>("Alison", 4.7));
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static void takeLastExample() throws InterruptedException, ExecutionException, TimeoutException {
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// #takeLast-operator-example
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// pair of (Name, GPA)
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List<Pair> sortedStudents =
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Arrays.asList(
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new Pair<>("Benita", 2.1),
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new Pair<>("Adrian", 3.1),
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new Pair<>("Alexis", 4),
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new Pair<>("Kendra", 4.2),
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new Pair<>("Jerrie", 4.3),
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new Pair<>("Alison", 4.7));
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Source<Pair, NotUsed> studentSource = Source.from(sortedStudents);
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Source<Pair, NotUsed> studentSource = Source.from(sortedStudents);
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CompletionStage<List<Pair>> topThree = studentSource.runWith(Sink.takeLast(3), materializer);
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CompletionStage<List<Pair>> topThree = studentSource.runWith(Sink.takeLast(3), materializer);
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topThree.thenAccept(result -> {
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System.out.println("#### Top students ####");
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for (int i = result.size() - 1; i >= 0; i--) {
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Pair<String, Double> s = result.get(i);
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System.out.println("Name: " + s.first() + ", " + "GPA: " + s.second());
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}
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topThree.thenAccept(
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result -> {
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System.out.println("#### Top students ####");
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for (int i = result.size() - 1; i >= 0; i--) {
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Pair<String, Double> s = result.get(i);
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System.out.println("Name: " + s.first() + ", " + "GPA: " + s.second());
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}
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});
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/*
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#### Top students ####
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Name: Alison, GPA: 4.7
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Name: Jerrie, GPA: 4.3
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Name: Kendra, GPA: 4.2
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*/
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//#takeLast-operator-example
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}
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/*
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#### Top students ####
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Name: Alison, GPA: 4.7
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Name: Jerrie, GPA: 4.3
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Name: Kendra, GPA: 4.2
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*/
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// #takeLast-operator-example
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}
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static void lastExample() throws InterruptedException, ExecutionException, TimeoutException {
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//#last-operator-example
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Source<Integer, NotUsed> source = Source.from(Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10));
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CompletionStage<Integer> result = source.runWith(Sink.last(), materializer);
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result.thenAccept(System.out::println);
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// 10
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//#last-operator-example
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}
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static void lastExample() throws InterruptedException, ExecutionException, TimeoutException {
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// #last-operator-example
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Source<Integer, NotUsed> source = Source.from(Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10));
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CompletionStage<Integer> result = source.runWith(Sink.last(), materializer);
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result.thenAccept(System.out::println);
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// 10
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// #last-operator-example
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}
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static void lastOptionExample() throws InterruptedException, ExecutionException, TimeoutException {
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//#lastOption-operator-example
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Source<Integer, NotUsed> source = Source.empty();
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CompletionStage<Optional<Integer>> result = source.runWith(Sink.lastOption(), materializer);
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result.thenAccept(System.out::println);
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// Optional.empty
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//#lastOption-operator-example
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}
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}
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static void lastOptionExample()
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throws InterruptedException, ExecutionException, TimeoutException {
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// #lastOption-operator-example
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Source<Integer, NotUsed> source = Source.empty();
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CompletionStage<Optional<Integer>> result = source.runWith(Sink.lastOption(), materializer);
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result.thenAccept(System.out::println);
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// Optional.empty
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// #lastOption-operator-example
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}
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}
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@ -4,84 +4,84 @@
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package jdocs.stream.operators;
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//#imports
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//#range-imports
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// #imports
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// #range-imports
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import akka.NotUsed;
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import akka.actor.ActorSystem;
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import akka.stream.ActorMaterializer;
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import akka.stream.Materializer;
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import akka.stream.javadsl.Source;
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//#range-imports
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// #range-imports
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//#actor-ref-imports
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// #actor-ref-imports
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import akka.actor.ActorRef;
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import akka.actor.Status.Success;
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import akka.stream.OverflowStrategy;
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import akka.stream.javadsl.Sink;
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//#actor-ref-imports
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// #actor-ref-imports
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import java.util.Arrays;
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//#imports
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// #imports
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public class SourceDocExamples {
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public static void fromExample() {
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//#source-from-example
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final ActorSystem system = ActorSystem.create("SourceFromExample");
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final Materializer materializer = ActorMaterializer.create(system);
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public static void fromExample() {
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// #source-from-example
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final ActorSystem system = ActorSystem.create("SourceFromExample");
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final Materializer materializer = ActorMaterializer.create(system);
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Source<Integer, NotUsed> ints = Source.from(Arrays.asList(0, 1, 2, 3, 4, 5));
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ints.runForeach(System.out::println, materializer);
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Source<Integer, NotUsed> ints = Source.from(Arrays.asList(0, 1, 2, 3, 4, 5));
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ints.runForeach(System.out::println, materializer);
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String text = "Perfection is finally attained not when there is no longer more to add," +
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"but when there is no longer anything to take away.";
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Source<String, NotUsed> words = Source.from(Arrays.asList(text.split("\\s")));
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words.runForeach(System.out::println, materializer);
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//#source-from-example
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}
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String text =
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"Perfection is finally attained not when there is no longer more to add,"
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+ "but when there is no longer anything to take away.";
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Source<String, NotUsed> words = Source.from(Arrays.asList(text.split("\\s")));
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words.runForeach(System.out::println, materializer);
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// #source-from-example
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}
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static void rangeExample() {
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static void rangeExample() {
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final ActorSystem system = ActorSystem.create("Source");
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final Materializer materializer = ActorMaterializer.create(system);
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final ActorSystem system = ActorSystem.create("Source");
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final Materializer materializer = ActorMaterializer.create(system);
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//#range
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// #range
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Source<Integer, NotUsed> source = Source.range(1, 100);
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Source<Integer, NotUsed> source = Source.range(1, 100);
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//#range
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// #range
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//#range
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Source<Integer, NotUsed> sourceStepFive = Source.range(1, 100, 5);
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// #range
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Source<Integer, NotUsed> sourceStepFive = Source.range(1, 100, 5);
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//#range
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// #range
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//#range
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Source<Integer, NotUsed> sourceStepNegative = Source.range(100, 1, -1);
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//#range
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// #range
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Source<Integer, NotUsed> sourceStepNegative = Source.range(100, 1, -1);
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// #range
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//#run-range
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source.runForeach(i -> System.out.println(i), materializer);
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//#run-range
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}
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// #run-range
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source.runForeach(i -> System.out.println(i), materializer);
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// #run-range
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}
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static void actorRef() {
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//#actor-ref
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static void actorRef() {
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// #actor-ref
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final ActorSystem system = ActorSystem.create();
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final Materializer materializer = ActorMaterializer.create(system);
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final ActorSystem system = ActorSystem.create();
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final Materializer materializer = ActorMaterializer.create(system);
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int bufferSize = 100;
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Source<Object, ActorRef> source = Source.actorRef(bufferSize, OverflowStrategy.dropHead());
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int bufferSize = 100;
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Source<Object, ActorRef> source = Source.actorRef(bufferSize, OverflowStrategy.dropHead());
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ActorRef actorRef = source.to(Sink.foreach(System.out::println)).run(materializer);
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actorRef.tell("hello", ActorRef.noSender());
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actorRef.tell("hello", ActorRef.noSender());
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// The stream completes successfully with the following message
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actorRef.tell(new Success("completes stream"), ActorRef.noSender());
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//#actor-ref
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}
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ActorRef actorRef = source.to(Sink.foreach(System.out::println)).run(materializer);
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actorRef.tell("hello", ActorRef.noSender());
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actorRef.tell("hello", ActorRef.noSender());
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// The stream completes successfully with the following message
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actorRef.tell(new Success("completes stream"), ActorRef.noSender());
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// #actor-ref
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}
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}
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@ -10,170 +10,171 @@ import akka.stream.javadsl.Flow;
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import akka.NotUsed;
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import akka.japi.function.Function2;
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//#zip
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//#zip-with
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//#zip-with-index
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//#or-else
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//#prepend
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//#concat
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//#interleave
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//#merge
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//#merge-sorted
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// #zip
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// #zip-with
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// #zip-with-index
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// #or-else
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// #prepend
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// #concat
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// #interleave
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// #merge
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// #merge-sorted
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import akka.stream.javadsl.Source;
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import akka.stream.javadsl.Sink;
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import java.util.Arrays;
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//#merge-sorted
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//#merge
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//#interleave
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//#concat
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//#prepend
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//#or-else
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//#zip-with-index
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//#zip-with
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//#zip
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// #merge-sorted
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// #merge
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// #interleave
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// #concat
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// #prepend
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// #or-else
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// #zip-with-index
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// #zip-with
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// #zip
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//#log
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// #log
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import akka.stream.Attributes;
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import akka.stream.javadsl.Source;
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//#log
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// #log
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import java.time.Duration;
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import java.util.Arrays;
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import java.util.Comparator;
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class SourceOrFlow {
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private static Materializer materializer = null;
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void logExample() {
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Flow.of(String.class)
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//#log
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// #log
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.log("myStream")
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.addAttributes(Attributes.createLogLevels(
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Attributes.logLevelOff(), // onElement
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Attributes.logLevelError(), // onFailure
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Attributes.logLevelInfo())) // onFinish
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//#log
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.addAttributes(
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Attributes.createLogLevels(
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Attributes.logLevelOff(), // onElement
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Attributes.logLevelError(), // onFailure
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Attributes.logLevelInfo())) // onFinish
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// #log
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;
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}
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void zipWithIndexExample() {
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Materializer materializer = null;
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//#zip-with-index
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// #zip-with-index
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Source.from(Arrays.asList("apple", "orange", "banana"))
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.zipWithIndex()
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.runWith(Sink.foreach(System.out::print), materializer);
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.zipWithIndex()
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.runWith(Sink.foreach(System.out::print), materializer);
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// this will print ('apple', 0), ('orange', 1), ('banana', 2)
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//#zip-with-index
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// #zip-with-index
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}
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void zipExample() {
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//#zip
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// #zip
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Source<String, NotUsed> sourceFruits = Source.from(Arrays.asList("apple", "orange", "banana"));
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Source<String, NotUsed> sourceFirstLetters = Source.from(Arrays.asList("A", "O", "B"));
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sourceFruits.zip(sourceFirstLetters).runWith(Sink.foreach(System.out::print), materializer);
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// this will print ('apple', 'A'), ('orange', 'O'), ('banana', 'B')
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//#zip
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// #zip
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}
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void zipWithExample() {
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//#zip-with
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// #zip-with
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Source<String, NotUsed> sourceCount = Source.from(Arrays.asList("one", "two", "three"));
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Source<String, NotUsed> sourceFruits = Source.from(Arrays.asList("apple", "orange", "banana"));
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sourceCount.zipWith(
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sourceCount
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.zipWith(
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sourceFruits,
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(Function2<String, String, String>) (countStr, fruitName) -> countStr + " " + fruitName
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).runWith(Sink.foreach(System.out::print), materializer);
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(Function2<String, String, String>) (countStr, fruitName) -> countStr + " " + fruitName)
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.runWith(Sink.foreach(System.out::print), materializer);
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// this will print 'one apple', 'two orange', 'three banana'
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//#zip-with
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// #zip-with
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}
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void prependExample() {
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//#prepend
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Source<String, NotUsed> ladies = Source.from(Arrays.asList("Emma", "Emily"));
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Source<String, NotUsed> gentlemen = Source.from(Arrays.asList("Liam", "William"));
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gentlemen.prepend(ladies).runWith(Sink.foreach(System.out::print), materializer);
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// this will print "Emma", "Emily", "Liam", "William"
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// #prepend
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Source<String, NotUsed> ladies = Source.from(Arrays.asList("Emma", "Emily"));
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Source<String, NotUsed> gentlemen = Source.from(Arrays.asList("Liam", "William"));
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gentlemen.prepend(ladies).runWith(Sink.foreach(System.out::print), materializer);
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// this will print "Emma", "Emily", "Liam", "William"
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//#prepend
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// #prepend
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}
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void concatExample() {
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//#concat
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Source<Integer, NotUsed> sourceA = Source.from(Arrays.asList(1, 2, 3, 4));
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Source<Integer, NotUsed> sourceB = Source.from(Arrays.asList(10, 20, 30, 40));
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sourceA.concat(sourceB).runWith(Sink.foreach(System.out::print), materializer);
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//prints 1, 2, 3, 4, 10, 20, 30, 40
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// #concat
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Source<Integer, NotUsed> sourceA = Source.from(Arrays.asList(1, 2, 3, 4));
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Source<Integer, NotUsed> sourceB = Source.from(Arrays.asList(10, 20, 30, 40));
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sourceA.concat(sourceB).runWith(Sink.foreach(System.out::print), materializer);
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// prints 1, 2, 3, 4, 10, 20, 30, 40
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//#concat
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// #concat
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}
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void interleaveExample() {
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//#interleave
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Source<Integer, NotUsed> sourceA = Source.from(Arrays.asList(1, 2, 3, 4));
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Source<Integer, NotUsed> sourceB = Source.from(Arrays.asList(10, 20, 30, 40));
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sourceA.interleave(sourceB, 2).runWith(Sink.foreach(System.out::print), materializer);
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//prints 1, 2, 10, 20, 3, 4, 30, 40
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// #interleave
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Source<Integer, NotUsed> sourceA = Source.from(Arrays.asList(1, 2, 3, 4));
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Source<Integer, NotUsed> sourceB = Source.from(Arrays.asList(10, 20, 30, 40));
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sourceA.interleave(sourceB, 2).runWith(Sink.foreach(System.out::print), materializer);
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// prints 1, 2, 10, 20, 3, 4, 30, 40
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//#interleave
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// #interleave
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}
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void mergeExample() {
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//#merge
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Source<Integer, NotUsed> sourceA = Source.from(Arrays.asList(1, 2, 3, 4));
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Source<Integer, NotUsed> sourceB = Source.from(Arrays.asList(10, 20, 30, 40));
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sourceA.merge(sourceB).runWith(Sink.foreach(System.out::print), materializer);
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// merging is not deterministic, can for example print 1, 2, 3, 4, 10, 20, 30, 40
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// #merge
|
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Source<Integer, NotUsed> sourceA = Source.from(Arrays.asList(1, 2, 3, 4));
|
||||
Source<Integer, NotUsed> sourceB = Source.from(Arrays.asList(10, 20, 30, 40));
|
||||
sourceA.merge(sourceB).runWith(Sink.foreach(System.out::print), materializer);
|
||||
// merging is not deterministic, can for example print 1, 2, 3, 4, 10, 20, 30, 40
|
||||
|
||||
//#merge
|
||||
// #merge
|
||||
}
|
||||
|
||||
|
||||
void mergeSortedExample() {
|
||||
//#merge-sorted
|
||||
Source<Integer, NotUsed> sourceA = Source.from(Arrays.asList(1, 3, 5, 7));
|
||||
Source<Integer, NotUsed> sourceB = Source.from(Arrays.asList(2, 4, 6, 8));
|
||||
sourceA.mergeSorted(sourceB, Comparator.<Integer>naturalOrder()).runWith(Sink.foreach(System.out::print), materializer);
|
||||
//prints 1, 2, 3, 4, 5, 6, 7, 8
|
||||
// #merge-sorted
|
||||
Source<Integer, NotUsed> sourceA = Source.from(Arrays.asList(1, 3, 5, 7));
|
||||
Source<Integer, NotUsed> sourceB = Source.from(Arrays.asList(2, 4, 6, 8));
|
||||
sourceA
|
||||
.mergeSorted(sourceB, Comparator.<Integer>naturalOrder())
|
||||
.runWith(Sink.foreach(System.out::print), materializer);
|
||||
// prints 1, 2, 3, 4, 5, 6, 7, 8
|
||||
|
||||
Source<Integer, NotUsed> sourceC = Source.from(Arrays.asList(20, 1, 1, 1));
|
||||
sourceA.mergeSorted(sourceC, Comparator.<Integer>naturalOrder()).runWith(Sink.foreach(System.out::print), materializer);
|
||||
//prints 1, 3, 5, 7, 20, 1, 1, 1
|
||||
//#merge-sorted
|
||||
Source<Integer, NotUsed> sourceC = Source.from(Arrays.asList(20, 1, 1, 1));
|
||||
sourceA
|
||||
.mergeSorted(sourceC, Comparator.<Integer>naturalOrder())
|
||||
.runWith(Sink.foreach(System.out::print), materializer);
|
||||
// prints 1, 3, 5, 7, 20, 1, 1, 1
|
||||
// #merge-sorted
|
||||
}
|
||||
|
||||
void orElseExample() {
|
||||
//#or-else
|
||||
Source<String, NotUsed> source1 = Source.from(Arrays.asList("First source"));
|
||||
Source<String, NotUsed> source2 = Source.from(Arrays.asList("Second source"));
|
||||
Source<String, NotUsed> emptySource = Source.empty();
|
||||
// #or-else
|
||||
Source<String, NotUsed> source1 = Source.from(Arrays.asList("First source"));
|
||||
Source<String, NotUsed> source2 = Source.from(Arrays.asList("Second source"));
|
||||
Source<String, NotUsed> emptySource = Source.empty();
|
||||
|
||||
source1.orElse(source2).runWith(Sink.foreach(System.out::print), materializer);
|
||||
// this will print "First source"
|
||||
source1.orElse(source2).runWith(Sink.foreach(System.out::print), materializer);
|
||||
// this will print "First source"
|
||||
|
||||
emptySource.orElse(source2).runWith(Sink.foreach(System.out::print), materializer);
|
||||
// this will print "Second source"
|
||||
emptySource.orElse(source2).runWith(Sink.foreach(System.out::print), materializer);
|
||||
// this will print "Second source"
|
||||
|
||||
//#or-else
|
||||
// #or-else
|
||||
}
|
||||
|
||||
void conflateExample() {
|
||||
//#conflate
|
||||
// #conflate
|
||||
Source.cycle(() -> Arrays.asList(1, 10, 100).iterator())
|
||||
.throttle(10, Duration.ofSeconds(1)) // fast upstream
|
||||
.conflate((Integer acc, Integer el) -> acc + el)
|
||||
.throttle(1, Duration.ofSeconds(1)); // slow downstream
|
||||
//#conflate
|
||||
// #conflate
|
||||
}
|
||||
|
||||
void scanExample() {
|
||||
//#scan
|
||||
// #scan
|
||||
Source<Integer, NotUsed> source = Source.range(1, 5);
|
||||
source.scan(0, (acc, x) -> acc + x).runForeach(System.out::println, materializer);
|
||||
// 0 (= 0)
|
||||
|
|
@ -182,10 +183,10 @@ class SourceOrFlow {
|
|||
// 6 (= 0 + 1 + 2 + 3)
|
||||
// 10 (= 0 + 1 + 2 + 3 + 4)
|
||||
// 15 (= 0 + 1 + 2 + 3 + 4 + 5)
|
||||
//#scan
|
||||
// #scan
|
||||
}
|
||||
|
||||
static //#conflateWithSeed-type
|
||||
static // #conflateWithSeed-type
|
||||
class Summed {
|
||||
|
||||
private final Integer el;
|
||||
|
|
@ -198,15 +199,15 @@ class SourceOrFlow {
|
|||
return new Summed(this.el + other.el);
|
||||
}
|
||||
}
|
||||
//#conflateWithSeed-type
|
||||
// #conflateWithSeed-type
|
||||
|
||||
void conflateWithSeedExample() {
|
||||
//#conflateWithSeed
|
||||
// #conflateWithSeed
|
||||
|
||||
Source.cycle(() -> Arrays.asList(1, 10, 100).iterator())
|
||||
.throttle(10, Duration.ofSeconds(1)) // fast upstream
|
||||
.conflateWithSeed(Summed::new, (Summed acc, Integer el) -> acc.sum(new Summed(el)))
|
||||
.throttle(1, Duration.ofSeconds(1)); // slow downstream
|
||||
//#conflateWithSeed
|
||||
// #conflateWithSeed
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue