Examples of org.apache.tez.dag.api.Vertex.addDataSource()

• org.apache.tez.dag.api.Vertex.addDataSource()
  Specifies an external data source for a Vertex. This is meant to be used when a Vertex reads Input directly from an external source

  For vertices which read data generated by another vertex - use the {@link DAG addEdge} method.If a vertex needs to use data generated by another vertex in the DAG and also from an external source, a combination of this API and the DAG.addEdge API can be used.

  Note: If more than one RootInput exists on a vertex, which generates events which need to be routed, or generates information to set parallelism, a custom vertex manager should be setup to handle this. Not using a custom vertex manager for such a scenario will lead to a runtime failure. @param inputName the name of the input. This will be used when accessing the input in the {@link LogicalIOProcessor} @param dataSourceDescriptor the @{link DataSourceDescriptor} for this input. @return this Vertex