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System wide materializer (#27491)

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Introduces a materializer started through an extension and then an implicit
conversion for Scala turning an implicitly available ActorSystem into a
materializer. The Java APIs has been ammended with run-methods accepting
an ActorSystem.
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Johan Andrén 2019-08-23 18:19:27 +02:00 • committed by GitHub
parent 77d1d33dbc
commit 45c826a218
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196 changed files with 1148 additions and 1129 deletions
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34
akka-docs/src/test/java/jdocs/stream/FlowErrorDocTest.java
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@ -20,8 +20,6 @@ import org.junit.BeforeClass;
import org.junit.Test;
import akka.actor.ActorSystem;
import akka.stream.ActorMaterializer;
import akka.stream.ActorMaterializerSettings;
import akka.stream.Materializer;
import akka.stream.Supervision;
import akka.stream.javadsl.Flow;
@ -48,14 +46,13 @@ public class FlowErrorDocTest extends AbstractJavaTest {
@Test(expected = ExecutionException.class)
public void demonstrateFailStream() throws Exception {
// #stop
final Materializer mat = ActorMaterializer.create(system);
final Source<Integer, NotUsed> source =
Source.from(Arrays.asList(0, 1, 2, 3, 4, 5)).map(elem -> 100 / elem);
final Sink<Integer, CompletionStage<Integer>> fold =
Sink.<Integer, Integer>fold(0, (acc, elem) -> acc + elem);
final CompletionStage<Integer> result = source.runWith(fold, mat);
final CompletionStage<Integer> result = source.runWith(fold, system);
// division by zero will fail the stream and the
// result here will be a Future completed with Failure(ArithmeticException)
// result here will be a CompletionStage failed with ArithmeticException
// #stop
result.toCompletableFuture().get(3, TimeUnit.SECONDS);
@ -69,15 +66,14 @@ public class FlowErrorDocTest extends AbstractJavaTest {
if (exc instanceof ArithmeticException) return Supervision.resume();
else return Supervision.stop();
};
final Materializer mat =
ActorMaterializer.create(
ActorMaterializerSettings.create(system).withSupervisionStrategy(decider), system);
final Source<Integer, NotUsed> source =
Source.from(Arrays.asList(0, 1, 2, 3, 4, 5)).map(elem -> 100 / elem);
Source.from(Arrays.asList(0, 1, 2, 3, 4, 5))
.map(elem -> 100 / elem)
.withAttributes(ActorAttributes.withSupervisionStrategy(decider));
final Sink<Integer, CompletionStage<Integer>> fold = Sink.fold(0, (acc, elem) -> acc + elem);
final CompletionStage<Integer> result = source.runWith(fold, mat);
final CompletionStage<Integer> result = source.runWith(fold, system);
// the element causing division by zero will be dropped
// result here will be a Future completed with Success(228)
// result here will be a CompletionStage completed with 228
// #resume
assertEquals(Integer.valueOf(228), result.toCompletableFuture().get(3, TimeUnit.SECONDS));
@ -86,7 +82,6 @@ public class FlowErrorDocTest extends AbstractJavaTest {
@Test
public void demonstrateResumeSectionStream() throws Exception {
// #resume-section
final Materializer mat = ActorMaterializer.create(system);
final Function<Throwable, Supervision.Directive> decider =
exc -> {
if (exc instanceof ArithmeticException) return Supervision.resume();
@ -100,9 +95,9 @@ public class FlowErrorDocTest extends AbstractJavaTest {
final Source<Integer, NotUsed> source = Source.from(Arrays.asList(0, 1, 2, 3, 4, 5)).via(flow);
final Sink<Integer, CompletionStage<Integer>> fold =
Sink.<Integer, Integer>fold(0, (acc, elem) -> acc + elem);
final CompletionStage<Integer> result = source.runWith(fold, mat);
final CompletionStage<Integer> result = source.runWith(fold, system);
// the elements causing division by zero will be dropped
// result here will be a Future completed with Success(150)
// result here will be a Future completed with 150
// #resume-section
assertEquals(Integer.valueOf(150), result.toCompletableFuture().get(3, TimeUnit.SECONDS));
@ -111,7 +106,6 @@ public class FlowErrorDocTest extends AbstractJavaTest {
@Test
public void demonstrateRestartSectionStream() throws Exception {
// #restart-section
final Materializer mat = ActorMaterializer.create(system);
final Function<Throwable, Supervision.Directive> decider =
exc -> {
if (exc instanceof IllegalArgumentException) return Supervision.restart();
@ -128,10 +122,10 @@ public class FlowErrorDocTest extends AbstractJavaTest {
.withAttributes(ActorAttributes.withSupervisionStrategy(decider));
final Source<Integer, NotUsed> source = Source.from(Arrays.asList(1, 3, -1, 5, 7)).via(flow);
final CompletionStage<List<Integer>> result =
source.grouped(1000).runWith(Sink.<List<Integer>>head(), mat);
source.grouped(1000).runWith(Sink.<List<Integer>>head(), system);
// the negative element cause the scan stage to be restarted,
// i.e. start from 0 again
// result here will be a Future completed with Success(List(0, 1, 4, 0, 5, 12))
// result here will be a Future completed with List(0, 1, 4, 0, 5, 12)
// #restart-section
assertEquals(
@ -141,7 +135,6 @@ public class FlowErrorDocTest extends AbstractJavaTest {
@Test
public void demonstrateRecover() {
// #recover
final Materializer mat = ActorMaterializer.create(system);
Source.from(Arrays.asList(0, 1, 2, 3, 4, 5, 6))
.map(
n -> {
@ -149,7 +142,7 @@ public class FlowErrorDocTest extends AbstractJavaTest {
else throw new RuntimeException("Boom!");
})
.recover(new PFBuilder().match(RuntimeException.class, ex -> "stream truncated").build())
.runForeach(System.out::println, mat);
.runForeach(System.out::println, system);
// #recover
/*
@ -168,7 +161,6 @@ public class FlowErrorDocTest extends AbstractJavaTest {
@Test
public void demonstrateRecoverWithRetries() {
// #recoverWithRetries
final Materializer mat = ActorMaterializer.create(system);
Source<String, NotUsed> planB = Source.from(Arrays.asList("five", "six", "seven", "eight"));
Source.from(Arrays.asList(0, 1, 2, 3, 4, 5, 6))
@ -180,7 +172,7 @@ public class FlowErrorDocTest extends AbstractJavaTest {
.recoverWithRetries(
1, // max attempts
new PFBuilder().match(RuntimeException.class, ex -> planB).build())
.runForeach(System.out::println, mat);
.runForeach(System.out::println, system);
// #recoverWithRetries
/*