com.hazelcast.jet.Util.mapPutEvents()方法的使用及代码示例

x33g5p2x  于2022-02-01 转载在 其他  
字(7.9k)|赞(0)|评价(0)|浏览(200)

本文整理了Java中com.hazelcast.jet.Util.mapPutEvents()方法的一些代码示例，展示了Util.mapPutEvents()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Util.mapPutEvents()方法的具体详情如下：
包路径：com.hazelcast.jet.Util
类名称：Util
方法名：mapPutEvents

Util.mapPutEvents介绍

[英]Returns a predicate for Sources#mapJournal and Sources#remoteMapJournal that passes only EntryEventType#ADDED and EntryEventType#UPDATED events.
[中]返回仅传递EntryEventType#ADDED和EntryEventType#UPDATED事件的Sources#mapJournal和Sources#remoteMapJournal的谓词。

代码示例

代码示例来源：origin: hazelcast/hazelcast-jet

  1. /**
  2.  * Returns a supplier of processors for
  3.  * {@link Sources#mapJournal(String, JournalInitialPosition)} )}.
  4.  */
  5. @Nonnull
  6. public static <K, V> ProcessorMetaSupplier streamMapP(
  7.     @Nonnull String mapName,
  8.     @Nonnull JournalInitialPosition initialPos,
  9.     @Nonnull EventTimePolicy<? super Entry<K, V>> eventTimePolicy
  10. ) {
  11.   return streamMapP(mapName, mapPutEvents(), mapEventToEntry(), initialPos, eventTimePolicy);
  12. }

代码示例来源：origin: hazelcast/hazelcast-jet

  1. /**
  2.  * Convenience for {@link #mapJournal(String, DistributedPredicate,
  3.  * DistributedFunction, JournalInitialPosition)}
  4.  * which will pass only {@link EntryEventType#ADDED ADDED} and
  5.  * {@link EntryEventType#UPDATED UPDATED} events and will project the
  6.  * event's key and new value into a {@code Map.Entry}.
  7.  */
  8. @Nonnull
  9. public static <K, V> StreamSource<Entry<K, V>> mapJournal(
  10.     @Nonnull String mapName,
  11.     @Nonnull JournalInitialPosition initialPos
  12. ) {
  13.   return mapJournal(mapName, mapPutEvents(), mapEventToEntry(), initialPos);
  14. }

代码示例来源：origin: hazelcast/hazelcast-jet

  1. /**
  2.  * Returns a supplier of processors for
  3.  * {@link Sources#remoteMapJournal(String, ClientConfig, JournalInitialPosition)}.
  4.  */
  5. @Nonnull
  6. public static <K, V> ProcessorMetaSupplier streamRemoteMapP(
  7.     @Nonnull String mapName,
  8.     @Nonnull ClientConfig clientConfig,
  9.     @Nonnull JournalInitialPosition initialPos,
  10.     @Nonnull EventTimePolicy<? super Entry<K, V>> eventTimePolicy
  11. ) {
  12.   return streamRemoteMapP(mapName, clientConfig, mapPutEvents(), mapEventToEntry(), initialPos,
  13.       eventTimePolicy);
  14. }

代码示例来源：origin: hazelcast/hazelcast-jet

  1. /**
  2.  * Convenience for {@link #remoteMapJournal(String, ClientConfig,
  3.  * DistributedPredicate, DistributedFunction, JournalInitialPosition)}
  4.  * which will pass only {@link EntryEventType#ADDED ADDED}
  5.  * and {@link EntryEventType#UPDATED UPDATED} events and will
  6.  * project the event's key and new value into a {@code Map.Entry}.
  7.  */
  8. @Nonnull
  9. public static <K, V> StreamSource<Entry<K, V>> remoteMapJournal(
  10.     @Nonnull String mapName,
  11.     @Nonnull ClientConfig clientConfig,
  12.     @Nonnull JournalInitialPosition initialPos
  13. ) {
  14.   return remoteMapJournal(mapName, clientConfig, mapPutEvents(), mapEventToEntry(), initialPos);
  15. }

代码示例来源：origin: hazelcast/hazelcast-jet

  1. /**
  2.  * Convenience for {@link #mapJournal(IMap, DistributedPredicate,
  3.  * DistributedFunction, JournalInitialPosition)}
  4.  * which will pass only {@link EntryEventType#ADDED
  5.  * ADDED} and {@link EntryEventType#UPDATED UPDATED}
  6.  * events and will project the event's key and new value into a {@code
  7.  * Map.Entry}.
  8.  * <p>
  9.  * <strong>NOTE:</strong> Jet only remembers the name of the map you supply
  10.  * and acquires a map with that name on the local cluster. If you supply a
  11.  * map instance from another cluster, no error will be thrown to indicate
  12.  * this.
  13.  */
  14. @Nonnull
  15. public static <K, V> StreamSource<Entry<K, V>> mapJournal(
  16.     @Nonnull IMap<? extends K, ? extends V> map,
  17.     @Nonnull JournalInitialPosition initialPos
  18. ) {
  19.   return mapJournal(map.getName(), mapPutEvents(), mapEventToEntry(), initialPos);
  20. }

代码示例来源：origin: hazelcast/hazelcast-jet-code-samples

  1. @SuppressWarnings("Convert2MethodRef") // https://bugs.openjdk.java.net/browse/JDK-8154236
  2. private static Pipeline aggregate() {
  3.   Pipeline p = Pipeline.create();
  4.   p.drawFrom(Sources.<PageVisit, Integer, PageVisit>mapJournal(PAGE_VISIT,
  5.       mapPutEvents(), mapEventNewValue(), START_FROM_OLDEST))
  6.    .addTimestamps(pv -> pv.timestamp(), 100)
  7.    .window(sliding(10, 1))
  8.    .aggregate(counting())
  9.    .drainTo(Sinks.logger());
  10.   return p;
  11. }

代码示例来源：origin: hazelcast/hazelcast-jet-code-samples

  1. @SuppressWarnings("Convert2MethodRef") // https://bugs.openjdk.java.net/browse/JDK-8154236
  2. private static Pipeline coGroup() {
  3.   Pipeline p = Pipeline.create();
  4.   StreamStageWithKey<PageVisit, Integer> pageVisits = p
  5.       .drawFrom(Sources.<PageVisit, Integer, PageVisit>mapJournal(PAGE_VISIT,
  6.           mapPutEvents(), mapEventNewValue(), START_FROM_OLDEST))
  7.       .addTimestamps(pv -> pv.timestamp(), 100)
  8.       .groupingKey(pv -> pv.userId());
  9.   StreamStageWithKey<Payment, Integer> payments = p
  10.       .drawFrom(Sources.<Payment, Integer, Payment>mapJournal(PAYMENT,
  11.           mapPutEvents(), mapEventNewValue(), START_FROM_OLDEST))
  12.       .addTimestamps(pm -> pm.timestamp(), 100)
  13.       .groupingKey(pm -> pm.userId());
  14.   StreamStageWithKey<AddToCart, Integer> addToCarts = p
  15.       .drawFrom(Sources.<AddToCart, Integer, AddToCart>mapJournal(ADD_TO_CART,
  16.           mapPutEvents(), mapEventNewValue(), START_FROM_OLDEST))
  17.       .addTimestamps(atc -> atc.timestamp(), 100)
  18.       .groupingKey(atc -> atc.userId());
  19.   StageWithKeyAndWindow<PageVisit, Integer> windowStage = pageVisits.window(sliding(10, 1));
  20.   StreamStage<TimestampedEntry<Integer, Tuple3<List<PageVisit>, List<AddToCart>, List<Payment>>>> coGrouped =
  21.       windowStage.aggregate3(toList(), addToCarts, toList(), payments, toList());
  22.   coGrouped.drainTo(Sinks.logger());
  23.   return p;
  24. }

代码示例来源：origin: hazelcast/hazelcast-jet-code-samples

  1. @SuppressWarnings("Convert2MethodRef") // https://bugs.openjdk.java.net/browse/JDK-8154236
  2. private static Pipeline groupAndAggregate() {
  3.   Pipeline p = Pipeline.create();
  4.   p.drawFrom(Sources.<PageVisit, Integer, PageVisit>mapJournal(PAGE_VISIT,
  5.       mapPutEvents(), mapEventNewValue(), START_FROM_OLDEST))
  6.    .addTimestamps(pv -> pv.timestamp(), 100)
  7.    .window(sliding(10, 1))
  8.    .groupingKey(pv -> pv.userId())
  9.    .aggregate(toList())
  10.    .drainTo(Sinks.logger());
  11.   return p;
  12. }

代码示例来源：origin: hazelcast/hazelcast-jet-code-samples

  1. @SuppressWarnings("Convert2MethodRef") // https://bugs.openjdk.java.net/browse/JDK-8154236
  2. private static Pipeline coGroupWithBuilder() {
  3.   Pipeline p = Pipeline.create();
  4.   StreamStageWithKey<PageVisit, Integer> pageVisits = p
  5.       .drawFrom(Sources.<PageVisit, Integer, PageVisit>mapJournal(PAGE_VISIT,
  6.           mapPutEvents(), mapEventNewValue(), START_FROM_OLDEST))
  7.       .addTimestamps(pv -> pv.timestamp(), 100)
  8.       .groupingKey(pv -> pv.userId());
  9.   StreamStageWithKey<AddToCart, Integer> addToCarts = p
  10.       .drawFrom(Sources.<AddToCart, Integer, AddToCart>mapJournal(ADD_TO_CART,
  11.           mapPutEvents(), mapEventNewValue(), START_FROM_OLDEST))
  12.       .addTimestamps(atc -> atc.timestamp(), 100)
  13.       .groupingKey(atc -> atc.userId());
  14.   StreamStageWithKey<Payment, Integer> payments = p
  15.       .drawFrom(Sources.<Payment, Integer, Payment>mapJournal(PAYMENT,
  16.           mapPutEvents(), mapEventNewValue(), START_FROM_OLDEST))
  17.       .addTimestamps(pm -> pm.timestamp(), 100)
  18.       .groupingKey(pm -> pm.userId());
  19.   StageWithKeyAndWindow<PageVisit, Integer> windowStage = pageVisits.window(sliding(10, 1));
  20.   WindowGroupAggregateBuilder<Integer, List<PageVisit>> builder = windowStage.aggregateBuilder(toList());
  21.   Tag<List<PageVisit>> pageVisitTag = builder.tag0();
  22.   Tag<List<AddToCart>> addToCartTag = builder.add(addToCarts, toList());
  23.   Tag<List<Payment>> paymentTag = builder.add(payments, toList());
  24.   StreamStage<TimestampedEntry<Integer, Tuple3<List<PageVisit>, List<AddToCart>, List<Payment>>>> coGrouped =
  25.       builder.build((winStart, winEnd, key, r) -> new TimestampedEntry<>(
  26.           winEnd, key, tuple3(r.get(pageVisitTag), r.get(addToCartTag), r.get(paymentTag))));
  27.   coGrouped.drainTo(Sinks.logger());
  28.   return p;
  29. }

代码示例来源：origin: hazelcast/hazelcast-jet-code-samples

  1. private static Pipeline buildPipeline() {
  2.   Pipeline p = Pipeline.create();
  3.   p.drawFrom(Sources.<PriceUpdateEvent, String, Tuple2<Integer, Long>>mapJournal(
  4.       "prices",
  5.       mapPutEvents(),
  6.       e -> new PriceUpdateEvent(e.getKey(), e.getNewValue().f0(), e.getNewValue().f1()),
  7.       START_FROM_CURRENT
  8.   ))
  9.    .addTimestamps(PriceUpdateEvent::timestamp, LAG_SECONDS * 1000)
  10.    .setLocalParallelism(1)
  11.    .groupingKey(PriceUpdateEvent::ticker)
  12.    .window(WindowDefinition.sliding(WINDOW_SIZE_SECONDS * 1000, 1000))
  13.    .aggregate(AggregateOperations.counting())
  14.    .drainTo(Sinks.logger());
  15.   return p;
  16. }

内容来源于网络，如有侵权，请联系作者删除！

Util

相关文章

    查看更多

    热门标签

    更多
    JavaquerypythonNode开发语言requestUtil数据库Table后端算法LoggerMessageElementParser

    最新文章

    更多
    • 蜀ICP备13028337号-1 大数据知识库 https://www.saoniuhuo.com © All rights reserved
    • 本站内容来源互联网,如果侵犯您的权益请联系我们删除, 联系方式：448109455@qq.com