StreamGraphHasher (Flink : 2.0-SNAPSHOT API)

All Known Implementing Classes:

StreamGraphHasherV2, StreamGraphUserHashHasher
```
public interface StreamGraphHasher
```
Interface for different implementations of generating hashes over a stream graph.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Map<Integer,byte[]>`	`traverseStreamGraphAndGenerateHashes(StreamGraph streamGraph)`	Returns a map with a hash for each `StreamNode` of the `StreamGraph`.

- Method Detail
  - traverseStreamGraphAndGenerateHashes
```
Map<Integer,byte[]> traverseStreamGraphAndGenerateHashes(StreamGraph streamGraph)
```
    Returns a map with a hash for each StreamNode of the StreamGraph. The hash is used as the JobVertexID in order to identify nodes across job submissions if they didn't change.