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Restart(Source|Flow|Sink): Configurable stream restart deadline (#29591)

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r-glyde 2020-10-05 08:12:15 +01:00 • committed by GitHub
parent 4cc3c58a08
commit a4acf23d05
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22 changed files with 727 additions and 347 deletions
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15
akka-docs/src/test/java/jdocs/stream/RestartDocTest.java
View file

@ -9,6 +9,7 @@ import akka.actor.ActorSystem;
import akka.stream.KillSwitch;
import akka.stream.KillSwitches;
import akka.stream.Materializer;
import akka.stream.RestartSettings;
import akka.stream.javadsl.Keep;
import akka.stream.javadsl.RestartSource;
import akka.stream.javadsl.Sink;
@ -61,12 +62,18 @@ public class RestartDocTest {
public void recoverWithBackoffSource() {
// #restart-with-backoff-source
RestartSettings settings =
RestartSettings.create(
Duration.ofSeconds(3), // min backoff
Duration.ofSeconds(30), // max backoff
0.2 // adds 20% "noise" to vary the intervals slightly
)
.withMaxRestarts(
20, Duration.ofMinutes(5)); // limits the amount of restarts to 20 within 5 minutes
Source<ServerSentEvent, NotUsed> eventStream =
RestartSource.withBackoff(
Duration.ofSeconds(3), // min backoff
Duration.ofSeconds(30), // max backoff
0.2, // adds 20% "noise" to vary the intervals slightly
20, // limits the amount of restarts to 20
settings,
() ->
// Create a source from a future of a source
Source.completionStageSource(

7
akka-docs/src/test/java/jdocs/stream/operators/source/Restart.java
View file

@ -8,6 +8,7 @@ import akka.NotUsed;
import akka.actor.Cancellable;
import akka.japi.Creator;
import akka.stream.KillSwitches;
import akka.stream.RestartSettings;
import akka.stream.UniqueKillSwitch;
import akka.stream.javadsl.Keep;
import akka.stream.javadsl.RestartSource;
@ -34,7 +35,8 @@ public class Restart {
}));
Source<Creator<Integer>, NotUsed> forever =
RestartSource.onFailuresWithBackoff(
Duration.ofSeconds(1), Duration.ofSeconds(10), 0.1, () -> flakySource);
RestartSettings.create(Duration.ofSeconds(1), Duration.ofSeconds(10), 0.1),
() -> flakySource);
forever.runWith(
Sink.foreach((Creator<Integer> nr) -> system.log().info("{}", nr.create())), system);
// logs
@ -99,7 +101,8 @@ public class Restart {
}));
UniqueKillSwitch stopRestarting =
RestartSource.onFailuresWithBackoff(
Duration.ofSeconds(1), Duration.ofSeconds(10), 0.1, () -> flakySource)
RestartSettings.create(Duration.ofSeconds(1), Duration.ofSeconds(10), 0.1),
() -> flakySource)
.viaMat(KillSwitches.single(), Keep.right())
.toMat(Sink.foreach(nr -> System.out.println("nr " + nr.create())), Keep.left())
.run(system);