org.apache.flink.streaming.api.graph

类 StreamGraphHasherV2

java.lang.Object

org.apache.flink.streaming.api.graph.StreamGraphHasherV2

所有已实现的接口:

StreamGraphHasher

public class StreamGraphHasherV2
extends Object
implements StreamGraphHasher

StreamGraphHasher from Flink 1.2. This contains duplicated code to ensure that the algorithm does not change with future Flink versions.

DO NOT MODIFY THIS CLASS

构造器概要

构造器

构造器和说明
StreamGraphHasherV2()

方法概要

限定符和类型	方法和说明
Map<Integer,byte[]>	traverseStreamGraphAndGenerateHashes(StreamGraph streamGraph) Returns a map with a hash for each StreamNode of the StreamGraph.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

StreamGraphHasherV2

public StreamGraphHasherV2()

方法详细资料

traverseStreamGraphAndGenerateHashes

public 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.

The complete StreamGraph is traversed. The hash is either computed from the transformation's user-specified id (see Transformation.getUid()) or generated in a deterministic way.

The generated hash is deterministic with respect to:

• node-local properties (node ID),
• chained output nodes, and
• input nodes hashes

指定者:

traverseStreamGraphAndGenerateHashes 在接口中 StreamGraphHasher

返回:

A map from StreamNode.id to hash as 16-byte array.