mirror of https://github.com/reiseburo/beetle
Sketching out some more example prototypes
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README.adoc
40
README.adoc
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@ -44,24 +44,52 @@ Subscribers, e.g.g
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.Consumer.java
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[source, java]
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----
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/* Using Java 8 Lambda syntax for conciseness' sake */
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LocateBrokers.zookeeper("localhost:2181")
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.map(broker -> TopicSubscription("some-topic"))
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/*
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* Prototype code showing how a typical end-user might use Beetle
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*/
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Brokers.fromZookeeper("localhost:2181")
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/* assuming a custom subscribe() operator exists in Beetle */
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.subscribe("some-topic")
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/* assuming a custom consume() operator exists in Beetle */
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.consume(message -> doSomethingWithMessage(message))
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.map(message -> message.commitOffset());
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----
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.ZookeeperlessConsumer.java
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[source, java]
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----
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Broker.just('localhost:6667')
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.map(broker -> TopicSubscription("some-topic")
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/*
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* Assuming we already know which broker we want to talk to and
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* we don't care at all about leader changes or committing offsets
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*/
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long startOffset = 0;
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Brokers.just('localhost:6667')
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.subscribe("some-topic", startOffset)
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.consume(m -> doSomethingWithMessage(m))
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.map(m -> m.commitOffset());
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----
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.LowLevelBeetle.java
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----
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/*
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* The following is a prototype of some ideas for how the above examples
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* might be implemented internally
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*/
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CuratorFramework cf = CuratorFrameworkFactory.newClient("localhost:2181");
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BrokersObserver.observe(cf)
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.subscribe(brokers -> TopicsObserver.observe(cf, brokers))
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.subscribe(partitions -> ConsumerObserver.observe(cf, partitions))
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.map(message ->
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doCustomBehaviorWith(message))
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.map(message -> m.commitOffsetTo(cf));
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----
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== Similar Projects
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. link:https://github.com/cjdev/kafka-rx[kafka-rx]: Scala-based client which
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