Now that we are more familiar with the different stages, let's see how we can modularize and reuse them. Akka Streams provides a large number of stages out of the box. We could group them into the following categories:
- Source stages
- Sink stages
- Processing stages
- Timer-driven stages
- Back pressure aware stages
- Nesting and flattening stages
- Time aware stages
- Fan-in stages
- Fan-out stages
In this recipe, we will reuse the code from the previous recipe to demonstrate how to make it modular. We will create two different streams that will use the same immutable stages but will run independently.
We will use the same prerequisites as the previous recipe. This time, we will implement a stream to do a word count. We will consume a GZIP compressed file and count the occurrences of each word.