Formatting java codes with sbt-java-formatter.
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hepin1989
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401 changed files with 19750 additions and 17450 deletions
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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));
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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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// #merge
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}
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void mergeSortedExample() {
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//#merge-sorted
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Source<Integer, NotUsed> sourceA = Source.from(Arrays.asList(1, 3, 5, 7));
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Source<Integer, NotUsed> sourceB = Source.from(Arrays.asList(2, 4, 6, 8));
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sourceA.mergeSorted(sourceB, Comparator.<Integer>naturalOrder()).runWith(Sink.foreach(System.out::print), materializer);
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//prints 1, 2, 3, 4, 5, 6, 7, 8
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// #merge-sorted
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Source<Integer, NotUsed> sourceA = Source.from(Arrays.asList(1, 3, 5, 7));
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Source<Integer, NotUsed> sourceB = Source.from(Arrays.asList(2, 4, 6, 8));
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sourceA
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.mergeSorted(sourceB, Comparator.<Integer>naturalOrder())
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.runWith(Sink.foreach(System.out::print), materializer);
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// prints 1, 2, 3, 4, 5, 6, 7, 8
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Source<Integer, NotUsed> sourceC = Source.from(Arrays.asList(20, 1, 1, 1));
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sourceA.mergeSorted(sourceC, Comparator.<Integer>naturalOrder()).runWith(Sink.foreach(System.out::print), materializer);
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//prints 1, 3, 5, 7, 20, 1, 1, 1
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//#merge-sorted
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Source<Integer, NotUsed> sourceC = Source.from(Arrays.asList(20, 1, 1, 1));
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sourceA
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.mergeSorted(sourceC, Comparator.<Integer>naturalOrder())
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.runWith(Sink.foreach(System.out::print), materializer);
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// prints 1, 3, 5, 7, 20, 1, 1, 1
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// #merge-sorted
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}
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void orElseExample() {
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//#or-else
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Source<String, NotUsed> source1 = Source.from(Arrays.asList("First source"));
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Source<String, NotUsed> source2 = Source.from(Arrays.asList("Second source"));
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Source<String, NotUsed> emptySource = Source.empty();
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// #or-else
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Source<String, NotUsed> source1 = Source.from(Arrays.asList("First source"));
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Source<String, NotUsed> source2 = Source.from(Arrays.asList("Second source"));
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Source<String, NotUsed> emptySource = Source.empty();
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source1.orElse(source2).runWith(Sink.foreach(System.out::print), materializer);
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// this will print "First source"
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source1.orElse(source2).runWith(Sink.foreach(System.out::print), materializer);
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// this will print "First source"
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emptySource.orElse(source2).runWith(Sink.foreach(System.out::print), materializer);
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// this will print "Second source"
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emptySource.orElse(source2).runWith(Sink.foreach(System.out::print), materializer);
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// this will print "Second source"
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//#or-else
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// #or-else
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}
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void conflateExample() {
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//#conflate
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// #conflate
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Source.cycle(() -> Arrays.asList(1, 10, 100).iterator())
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.throttle(10, Duration.ofSeconds(1)) // fast upstream
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.conflate((Integer acc, Integer el) -> acc + el)
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.throttle(1, Duration.ofSeconds(1)); // slow downstream
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//#conflate
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// #conflate
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}
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void scanExample() {
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//#scan
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// #scan
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Source<Integer, NotUsed> source = Source.range(1, 5);
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source.scan(0, (acc, x) -> acc + x).runForeach(System.out::println, materializer);
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// 0 (= 0)
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@ -182,10 +183,10 @@ class SourceOrFlow {
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// 6 (= 0 + 1 + 2 + 3)
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// 10 (= 0 + 1 + 2 + 3 + 4)
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// 15 (= 0 + 1 + 2 + 3 + 4 + 5)
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//#scan
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// #scan
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}
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static //#conflateWithSeed-type
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static // #conflateWithSeed-type
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class Summed {
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private final Integer el;
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@ -198,15 +199,15 @@ class SourceOrFlow {
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return new Summed(this.el + other.el);
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}
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}
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//#conflateWithSeed-type
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// #conflateWithSeed-type
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void conflateWithSeedExample() {
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//#conflateWithSeed
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// #conflateWithSeed
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Source.cycle(() -> Arrays.asList(1, 10, 100).iterator())
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.throttle(10, Duration.ofSeconds(1)) // fast upstream
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.conflateWithSeed(Summed::new, (Summed acc, Integer el) -> acc.sum(new Summed(el)))
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.throttle(1, Duration.ofSeconds(1)); // slow downstream
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//#conflateWithSeed
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// #conflateWithSeed
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}
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}
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