Introduction to Kafka Streams - Michael Noll - Berlin Buzzwords ...
Kafka streams - power without weight (jeeconf)
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Transcript of Kafka streams - power without weight (jeeconf)
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KStreamBuilder builder =new KStreamBuilder();
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KStreamBuilder builder =new KStreamBuilder();
KStream<String, String> textLines = builder.stream(inputTopic);
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KStreamBuilder builder =new KStreamBuilder();
KStream<String, String> textLines = builder.stream(inputTopic);
KTable<String, Long> wordCounts = textLines.flatMapValues(value -> toWords(value)).groupBy((key, word) -> word).count("Counts");
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KStreamBuilder builder =new KStreamBuilder();
KStream<String, String> textLines = builder.stream(inputTopic);
KTable<String, Long> wordCounts = textLines.flatMapValues(value -> toWords(value)).groupBy((key, word) -> word).count("Counts");
wordCounts.toStream().to(outputTopic);
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KStreamBuilder builder = new KStreamBuilder();
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KStreamBuilder builder = new KStreamBuilder();
StateStoreSupplier store = Stores.create(”Store").persistent().build();
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KStreamBuilder builder = new KStreamBuilder();
builder.addSource("SOURCE", inputTopic)
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KStreamBuilder builder = new KStreamBuilder();
builder.addSource("SOURCE", inputTopic)
.addProcessor("WORDS_COUNT",new ProcessorSupplier(store.name()),
@Override public void process(byte[] key, String value) {Optional<Long> count =
Optional.ofNullable(stateStore.get(value));Long incrementedCount = count.orElse(0L) + 1;stateStore.put(value, incrementedCount);processorContext.forward(value, incrementedCount);processorContext.commit();
}
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KStreamBuilder builder = new KStreamBuilder();
builder.addSource("SOURCE", inputTopic)
.addProcessor("WORDS_COUNT",new ProcessorSupplier(store.name()),
.addStateStore(wordCountsStore, "WORDS_COUNT")
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KStreamBuilder builder = new KStreamBuilder();
builder.addSource("SOURCE", inputTopic)
.addProcessor("WORDS_COUNT",new ProcessorSupplier(store.name()),
.addStateStore(wordCountsStore, "WORDS_COUNT")
.addSink("OUTPUT", outputTopic, "WORDS_COUNT");
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•elasticity and scalability
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•Local/Remote state in stream processing
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