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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@ -35,10 +35,10 @@ public class PersistenceQueryDocTest {
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final ActorSystem system = ActorSystem.create();
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final ActorMaterializer mat = ActorMaterializer.create(system);
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static
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//#advanced-journal-query-types
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public class RichEvent {
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public final Set<String >tags;
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public
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// #advanced-journal-query-types
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static class RichEvent {
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public final Set<String> tags;
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public final Object payload;
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public RichEvent(Set<String> tags, Object payload) {
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@ -46,12 +46,12 @@ public class PersistenceQueryDocTest {
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this.payload = payload;
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}
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}
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//#advanced-journal-query-types
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// #advanced-journal-query-types
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static
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//#advanced-journal-query-types
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public
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// #advanced-journal-query-types
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// a plugin can provide:
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public final class QueryMetadata{
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static final class QueryMetadata {
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public final boolean deterministicOrder;
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public final boolean infinite;
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@ -60,11 +60,11 @@ public class PersistenceQueryDocTest {
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this.infinite = infinite;
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}
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}
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//#advanced-journal-query-types
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// #advanced-journal-query-types
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static
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//#my-read-journal
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public class MyReadJournalProvider implements ReadJournalProvider {
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public
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// #my-read-journal
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static class MyReadJournalProvider implements ReadJournalProvider {
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private final MyJavadslReadJournal javadslReadJournal;
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public MyReadJournalProvider(ExtendedActorSystem system, Config config) {
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@ -81,52 +81,54 @@ public class PersistenceQueryDocTest {
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return this.javadslReadJournal;
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}
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}
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//#my-read-journal
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// #my-read-journal
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static
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//#my-read-journal
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public class MyJavadslReadJournal implements
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akka.persistence.query.javadsl.ReadJournal,
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akka.persistence.query.javadsl.EventsByTagQuery,
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akka.persistence.query.javadsl.EventsByPersistenceIdQuery,
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akka.persistence.query.javadsl.PersistenceIdsQuery,
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akka.persistence.query.javadsl.CurrentPersistenceIdsQuery {
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public
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// #my-read-journal
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static class MyJavadslReadJournal
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implements akka.persistence.query.javadsl.ReadJournal,
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akka.persistence.query.javadsl.EventsByTagQuery,
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akka.persistence.query.javadsl.EventsByPersistenceIdQuery,
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akka.persistence.query.javadsl.PersistenceIdsQuery,
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akka.persistence.query.javadsl.CurrentPersistenceIdsQuery {
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private final FiniteDuration refreshInterval;
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public MyJavadslReadJournal(ExtendedActorSystem system, Config config) {
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refreshInterval =
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FiniteDuration.create(config.getDuration("refresh-interval",
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TimeUnit.MILLISECONDS), TimeUnit.MILLISECONDS);
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FiniteDuration.create(
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config.getDuration("refresh-interval", TimeUnit.MILLISECONDS), TimeUnit.MILLISECONDS);
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}
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/**
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* You can use `NoOffset` to retrieve all events with a given tag or retrieve a subset of all
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* events by specifying a `Sequence` `offset`. The `offset` corresponds to an ordered sequence number for
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* the specific tag. Note that the corresponding offset of each event is provided in the
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* [[akka.persistence.query.EventEnvelope]], which makes it possible to resume the
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* stream at a later point from a given offset.
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* events by specifying a `Sequence` `offset`. The `offset` corresponds to an ordered sequence
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* number for the specific tag. Note that the corresponding offset of each event is provided in
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* the [[akka.persistence.query.EventEnvelope]], which makes it possible to resume the stream at
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* a later point from a given offset.
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*
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* The `offset` is exclusive, i.e. the event with the exact same sequence number will not be included
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* in the returned stream. This means that you can use the offset that is returned in `EventEnvelope`
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* as the `offset` parameter in a subsequent query.
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* <p>The `offset` is exclusive, i.e. the event with the exact same sequence number will not be
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* included in the returned stream. This means that you can use the offset that is returned in
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* `EventEnvelope` as the `offset` parameter in a subsequent query.
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*/
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@Override
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public Source<EventEnvelope, NotUsed> eventsByTag(String tag, Offset offset) {
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if(offset instanceof Sequence){
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if (offset instanceof Sequence) {
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Sequence sequenceOffset = (Sequence) offset;
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final Props props = MyEventsByTagPublisher.props(tag, sequenceOffset.value(), refreshInterval);
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return Source.<EventEnvelope>actorPublisher(props).
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mapMaterializedValue(m -> NotUsed.getInstance());
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final Props props =
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MyEventsByTagPublisher.props(tag, sequenceOffset.value(), refreshInterval);
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return Source.<EventEnvelope>actorPublisher(props)
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.mapMaterializedValue(m -> NotUsed.getInstance());
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} else if (offset == NoOffset.getInstance())
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return eventsByTag(tag, Offset.sequence(0L)); //recursive
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return eventsByTag(tag, Offset.sequence(0L)); // recursive
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else
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throw new IllegalArgumentException("MyJavadslReadJournal does not support " + offset.getClass().getName() + " offsets");
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throw new IllegalArgumentException(
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"MyJavadslReadJournal does not support " + offset.getClass().getName() + " offsets");
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}
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@Override
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public Source<EventEnvelope, NotUsed> eventsByPersistenceId(String persistenceId,
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long fromSequenceNr, long toSequenceNr) {
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public Source<EventEnvelope, NotUsed> eventsByPersistenceId(
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String persistenceId, long fromSequenceNr, long toSequenceNr) {
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// implement in a similar way as eventsByTag
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throw new UnsupportedOperationException("Not implemented yet");
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}
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@ -145,24 +147,23 @@ public class PersistenceQueryDocTest {
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// possibility to add more plugin specific queries
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//#advanced-journal-query-definition
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// #advanced-journal-query-definition
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public Source<RichEvent, QueryMetadata> byTagsWithMeta(Set<String> tags) {
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//#advanced-journal-query-definition
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// #advanced-journal-query-definition
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// implement in a similar way as eventsByTag
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throw new UnsupportedOperationException("Not implemented yet");
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}
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}
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//#my-read-journal
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// #my-read-journal
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static
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//#my-read-journal
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public class MyScaladslReadJournal implements
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akka.persistence.query.scaladsl.ReadJournal,
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akka.persistence.query.scaladsl.EventsByTagQuery,
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akka.persistence.query.scaladsl.EventsByPersistenceIdQuery,
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akka.persistence.query.scaladsl.PersistenceIdsQuery,
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akka.persistence.query.scaladsl.CurrentPersistenceIdsQuery {
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public
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// #my-read-journal
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static class MyScaladslReadJournal
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implements akka.persistence.query.scaladsl.ReadJournal,
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akka.persistence.query.scaladsl.EventsByTagQuery,
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akka.persistence.query.scaladsl.EventsByPersistenceIdQuery,
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akka.persistence.query.scaladsl.PersistenceIdsQuery,
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akka.persistence.query.scaladsl.CurrentPersistenceIdsQuery {
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private final MyJavadslReadJournal javadslReadJournal;
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@ -179,8 +180,9 @@ public class PersistenceQueryDocTest {
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@Override
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public akka.stream.scaladsl.Source<EventEnvelope, NotUsed> eventsByPersistenceId(
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String persistenceId, long fromSequenceNr, long toSequenceNr) {
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return javadslReadJournal.eventsByPersistenceId(persistenceId, fromSequenceNr,
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toSequenceNr).asScala();
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return javadslReadJournal
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.eventsByPersistenceId(persistenceId, fromSequenceNr, toSequenceNr)
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.asScala();
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}
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@Override
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@ -200,61 +202,64 @@ public class PersistenceQueryDocTest {
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Set<String> jTags = scala.collection.JavaConverters.setAsJavaSetConverter(tags).asJava();
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return javadslReadJournal.byTagsWithMeta(jTags).asScala();
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}
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}
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//#my-read-journal
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// #my-read-journal
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void demonstrateBasicUsage() {
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final ActorSystem system = ActorSystem.create();
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//#basic-usage
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// #basic-usage
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// obtain read journal by plugin id
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final MyJavadslReadJournal readJournal =
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PersistenceQuery.get(system).getReadJournalFor(MyJavadslReadJournal.class,
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"akka.persistence.query.my-read-journal");
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PersistenceQuery.get(system)
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.getReadJournalFor(
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MyJavadslReadJournal.class, "akka.persistence.query.my-read-journal");
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// issue query to journal
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Source<EventEnvelope, NotUsed> source =
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readJournal.eventsByPersistenceId("user-1337", 0, Long.MAX_VALUE);
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readJournal.eventsByPersistenceId("user-1337", 0, Long.MAX_VALUE);
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// materialize stream, consuming events
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ActorMaterializer mat = ActorMaterializer.create(system);
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source.runForeach(event -> System.out.println("Event: " + event), mat);
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//#basic-usage
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// #basic-usage
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}
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void demonstrateAllPersistenceIdsLive() {
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final MyJavadslReadJournal readJournal =
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PersistenceQuery.get(system).getReadJournalFor(MyJavadslReadJournal.class,
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"akka.persistence.query.my-read-journal");
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PersistenceQuery.get(system)
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.getReadJournalFor(
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MyJavadslReadJournal.class, "akka.persistence.query.my-read-journal");
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//#all-persistence-ids-live
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// #all-persistence-ids-live
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readJournal.persistenceIds();
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//#all-persistence-ids-live
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// #all-persistence-ids-live
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}
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void demonstrateNoRefresh() {
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final ActorSystem system = ActorSystem.create();
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final MyJavadslReadJournal readJournal =
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PersistenceQuery.get(system).getReadJournalFor(MyJavadslReadJournal.class,
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"akka.persistence.query.my-read-journal");
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PersistenceQuery.get(system)
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.getReadJournalFor(
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MyJavadslReadJournal.class, "akka.persistence.query.my-read-journal");
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//#all-persistence-ids-snap
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// #all-persistence-ids-snap
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readJournal.currentPersistenceIds();
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//#all-persistence-ids-snap
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// #all-persistence-ids-snap
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}
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void demonstrateRefresh() {
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final ActorSystem system = ActorSystem.create();
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final MyJavadslReadJournal readJournal =
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PersistenceQuery.get(system).getReadJournalFor(MyJavadslReadJournal.class,
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"akka.persistence.query.my-read-journal");
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PersistenceQuery.get(system)
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.getReadJournalFor(
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MyJavadslReadJournal.class, "akka.persistence.query.my-read-journal");
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//#events-by-persistent-id
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// #events-by-persistent-id
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readJournal.eventsByPersistenceId("user-us-1337", 0L, Long.MAX_VALUE);
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//#events-by-persistent-id
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// #events-by-persistent-id
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}
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void demonstrateEventsByTag() {
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@ -262,58 +267,71 @@ public class PersistenceQueryDocTest {
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final ActorMaterializer mat = ActorMaterializer.create(system);
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final MyJavadslReadJournal readJournal =
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PersistenceQuery.get(system).getReadJournalFor(MyJavadslReadJournal.class,
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"akka.persistence.query.my-read-journal");
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PersistenceQuery.get(system)
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.getReadJournalFor(
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MyJavadslReadJournal.class, "akka.persistence.query.my-read-journal");
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//#events-by-tag
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// #events-by-tag
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// assuming journal is able to work with numeric offsets we can:
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final Source<EventEnvelope, NotUsed> blueThings =
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readJournal.eventsByTag("blue", new Sequence(0L));
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readJournal.eventsByTag("blue", new Sequence(0L));
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// find top 10 blue things:
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final CompletionStage<List<Object>> top10BlueThings =
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blueThings
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.map(EventEnvelope::event)
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.take(10) // cancels the query stream after pulling 10 elements
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.runFold(new ArrayList<>(10), (acc, e) -> {
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acc.add(e);
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return acc;
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}, mat);
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blueThings
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.map(EventEnvelope::event)
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.take(10) // cancels the query stream after pulling 10 elements
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.runFold(
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new ArrayList<>(10),
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(acc, e) -> {
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acc.add(e);
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return acc;
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},
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mat);
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// start another query, from the known offset
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Source<EventEnvelope, NotUsed> blue = readJournal.eventsByTag("blue", new Sequence(10));
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//#events-by-tag
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// #events-by-tag
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}
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void demonstrateMaterializedQueryValues() {
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final ActorSystem system = ActorSystem.create();
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final ActorMaterializer mat = ActorMaterializer.create(system);
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final MyJavadslReadJournal readJournal =
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PersistenceQuery.get(system).getReadJournalFor(MyJavadslReadJournal.class,
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"akka.persistence.query.my-read-journal");
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PersistenceQuery.get(system)
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.getReadJournalFor(
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MyJavadslReadJournal.class, "akka.persistence.query.my-read-journal");
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//#advanced-journal-query-usage
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// #advanced-journal-query-usage
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Set<String> tags = new HashSet<String>();
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tags.add("red");
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tags.add("blue");
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final Source<RichEvent, QueryMetadata> events = readJournal.byTagsWithMeta(tags)
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.mapMaterializedValue(meta -> {
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System.out.println("The query is: " +
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"ordered deterministically: " + meta.deterministicOrder + " " +
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"infinite: " + meta.infinite);
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return meta;
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});
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final Source<RichEvent, QueryMetadata> events =
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readJournal
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.byTagsWithMeta(tags)
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.mapMaterializedValue(
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meta -> {
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System.out.println(
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"The query is: "
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+ "ordered deterministically: "
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+ meta.deterministicOrder
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+ " "
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+ "infinite: "
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+ meta.infinite);
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return meta;
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});
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events.map(event -> {
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System.out.println("Event payload: " + event.payload);
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return event.payload;
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}).runWith(Sink.ignore(), mat);
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events
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.map(
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event -> {
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System.out.println("Event payload: " + event.payload);
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return event.payload;
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})
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.runWith(Sink.ignore(), mat);
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//#advanced-journal-query-usage
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// #advanced-journal-query-usage
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}
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class ReactiveStreamsCompatibleDBDriver {
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@ -327,54 +345,54 @@ public class PersistenceQueryDocTest {
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final ActorMaterializer mat = ActorMaterializer.create(system);
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final MyJavadslReadJournal readJournal =
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PersistenceQuery.get(system).getReadJournalFor(MyJavadslReadJournal.class,
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"akka.persistence.query.my-read-journal");
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PersistenceQuery.get(system)
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.getReadJournalFor(
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MyJavadslReadJournal.class, "akka.persistence.query.my-read-journal");
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//#projection-into-different-store-rs
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// #projection-into-different-store-rs
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final ReactiveStreamsCompatibleDBDriver driver = new ReactiveStreamsCompatibleDBDriver();
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final Subscriber<List<Object>> dbBatchWriter = driver.batchWriter();
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// Using an example (Reactive Streams) Database driver
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readJournal
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.eventsByPersistenceId("user-1337", 0L, Long.MAX_VALUE)
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.map(envelope -> envelope.event())
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.grouped(20) // batch inserts into groups of 20
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.runWith(Sink.fromSubscriber(dbBatchWriter), mat); // write batches to read-side database
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//#projection-into-different-store-rs
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.eventsByPersistenceId("user-1337", 0L, Long.MAX_VALUE)
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.map(envelope -> envelope.event())
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.grouped(20) // batch inserts into groups of 20
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.runWith(Sink.fromSubscriber(dbBatchWriter), mat); // write batches to read-side database
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// #projection-into-different-store-rs
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}
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//#projection-into-different-store-simple-classes
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// #projection-into-different-store-simple-classes
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class ExampleStore {
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CompletionStage<Void> save(Object any) {
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// ...
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//#projection-into-different-store-simple-classes
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// #projection-into-different-store-simple-classes
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return null;
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//#projection-into-different-store-simple-classes
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// #projection-into-different-store-simple-classes
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}
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}
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//#projection-into-different-store-simple-classes
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// #projection-into-different-store-simple-classes
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void demonstrateWritingIntoDifferentStoreWithMapAsync() {
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final ActorSystem system = ActorSystem.create();
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final ActorMaterializer mat = ActorMaterializer.create(system);
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final MyJavadslReadJournal readJournal =
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PersistenceQuery.get(system).getReadJournalFor(MyJavadslReadJournal.class,
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"akka.persistence.query.my-read-journal");
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PersistenceQuery.get(system)
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.getReadJournalFor(
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MyJavadslReadJournal.class, "akka.persistence.query.my-read-journal");
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//#projection-into-different-store-simple
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// #projection-into-different-store-simple
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final ExampleStore store = new ExampleStore();
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readJournal
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.eventsByTag("bid", new Sequence(0L))
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.mapAsync(1, store::save)
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.runWith(Sink.ignore(), mat);
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//#projection-into-different-store-simple
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.eventsByTag("bid", new Sequence(0L))
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.mapAsync(1, store::save)
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.runWith(Sink.ignore(), mat);
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// #projection-into-different-store-simple
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}
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//#projection-into-different-store
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// #projection-into-different-store
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class MyResumableProjection {
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private final String name;
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@ -384,30 +402,30 @@ public class PersistenceQueryDocTest {
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public CompletionStage<Long> saveProgress(Offset offset) {
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// ...
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//#projection-into-different-store
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// #projection-into-different-store
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return null;
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//#projection-into-different-store
|
||||
// #projection-into-different-store
|
||||
}
|
||||
|
||||
public CompletionStage<Long> latestOffset() {
|
||||
// ...
|
||||
//#projection-into-different-store
|
||||
// #projection-into-different-store
|
||||
return null;
|
||||
//#projection-into-different-store
|
||||
// #projection-into-different-store
|
||||
}
|
||||
}
|
||||
//#projection-into-different-store
|
||||
|
||||
// #projection-into-different-store
|
||||
|
||||
void demonstrateWritingIntoDifferentStoreWithResumableProjections() throws Exception {
|
||||
final ActorSystem system = ActorSystem.create();
|
||||
final ActorMaterializer mat = ActorMaterializer.create(system);
|
||||
|
||||
final MyJavadslReadJournal readJournal =
|
||||
PersistenceQuery.get(system).getReadJournalFor(MyJavadslReadJournal.class,
|
||||
"akka.persistence.query.my-read-journal");
|
||||
PersistenceQuery.get(system)
|
||||
.getReadJournalFor(
|
||||
MyJavadslReadJournal.class, "akka.persistence.query.my-read-journal");
|
||||
|
||||
|
||||
//#projection-into-different-store-actor-run
|
||||
// #projection-into-different-store-actor-run
|
||||
final Duration timeout = Duration.ofSeconds(3);
|
||||
|
||||
final MyResumableProjection bidProjection = new MyResumableProjection("bid");
|
||||
|
|
@ -415,19 +433,22 @@ public class PersistenceQueryDocTest {
|
|||
final Props writerProps = Props.create(TheOneWhoWritesToQueryJournal.class, "bid");
|
||||
final ActorRef writer = system.actorOf(writerProps, "bid-projection-writer");
|
||||
|
||||
long startFromOffset = bidProjection.latestOffset().toCompletableFuture().get(3, TimeUnit.SECONDS);
|
||||
long startFromOffset =
|
||||
bidProjection.latestOffset().toCompletableFuture().get(3, TimeUnit.SECONDS);
|
||||
|
||||
readJournal
|
||||
.eventsByTag("bid", new Sequence(startFromOffset))
|
||||
.mapAsync(8, envelope -> {
|
||||
final CompletionStage<Object> f = ask(writer, envelope.event(), timeout);
|
||||
return f.thenApplyAsync(in -> envelope.offset(), system.dispatcher());
|
||||
})
|
||||
.mapAsync(1, offset -> bidProjection.saveProgress(offset))
|
||||
.runWith(Sink.ignore(), mat);
|
||||
.eventsByTag("bid", new Sequence(startFromOffset))
|
||||
.mapAsync(
|
||||
8,
|
||||
envelope -> {
|
||||
final CompletionStage<Object> f = ask(writer, envelope.event(), timeout);
|
||||
return f.thenApplyAsync(in -> envelope.offset(), system.dispatcher());
|
||||
})
|
||||
.mapAsync(1, offset -> bidProjection.saveProgress(offset))
|
||||
.runWith(Sink.ignore(), mat);
|
||||
}
|
||||
|
||||
//#projection-into-different-store-actor-run
|
||||
// #projection-into-different-store-actor-run
|
||||
|
||||
class ComplexState {
|
||||
|
||||
|
|
@ -442,7 +463,7 @@ public class PersistenceQueryDocTest {
|
|||
}
|
||||
}
|
||||
|
||||
//#projection-into-different-store-actor
|
||||
// #projection-into-different-store-actor
|
||||
final class TheOneWhoWritesToQueryJournal extends AbstractActor {
|
||||
private final ExampleStore store;
|
||||
|
||||
|
|
@ -455,23 +476,21 @@ public class PersistenceQueryDocTest {
|
|||
@Override
|
||||
public Receive createReceive() {
|
||||
return receiveBuilder()
|
||||
.matchAny(message -> {
|
||||
state = updateState(state, message);
|
||||
.matchAny(
|
||||
message -> {
|
||||
state = updateState(state, message);
|
||||
|
||||
// example saving logic that requires state to become ready:
|
||||
if (state.readyToSave())
|
||||
store.save(Record.of(state));
|
||||
|
||||
})
|
||||
.build();
|
||||
// example saving logic that requires state to become ready:
|
||||
if (state.readyToSave()) store.save(Record.of(state));
|
||||
})
|
||||
.build();
|
||||
}
|
||||
|
||||
|
||||
ComplexState updateState(ComplexState state, Object msg) {
|
||||
// some complicated aggregation logic here ...
|
||||
return state;
|
||||
}
|
||||
}
|
||||
//#projection-into-different-store-actor
|
||||
// #projection-into-different-store-actor
|
||||
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue