Package org.apache.storm.starter.streams
Class StatefulWordCount
java.lang.Object
org.apache.storm.starter.streams.StatefulWordCount
A stateful word count that uses
PairStream.updateStateByKey(StateUpdater)
to
save the counts in a key value state. This example uses Redis state store.
You should start a local redis instance before running the 'storm jar' command. By default the connection will be attempted at localhost:6379. The default RedisKeyValueStateProvider parameters can be overridden in conf/storm.yaml, for e.g.
topology.state.provider.config: '{"keyClass":"...", "valueClass":"...", "keySerializerClass":"...", "valueSerializerClass":"...", "jedisPoolConfig":{"host":"localhost", "port":6379, "timeout":2000, "database":0, "password":"xyz"}}'
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Constructor Summary
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Method Summary
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Constructor Details
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StatefulWordCount
public StatefulWordCount()
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Method Details
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main
- Throws:
Exception
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