StateQueryExample (Storm 2.7.1 API)

java.lang.Object
- org.apache.storm.starter.streams.StateQueryExample

```
public class StateQueryExample
extends Object
```
An example that uses Stream.stateQuery(StreamState) to query the state
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"}}'
 
```

- Constructor Summary
  
  Constructors
  Constructor Description
  
  StateQueryExample()
- Method Summary
  
  All Methods Static Methods Concrete Methods
  Modifier and Type Method Description
  
  static void main(String[] args)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- StateQueryExample
```
public StateQueryExample()
```

Method Detail

main

public static void main(String[] args)
                 throws Exception

Throws:: Exception