Flux in detail

- [Instructor] Moving on, let's take a deeper dive…into the Flux data type.…First of all, what really is a Flux?…A Flux is a Reactive Streams publisher…that has basic flow operators.…You can generate a Flux…from arbitrary callback types using static factories.…They will emit from zero to any number of elements,…and a Flux will complete either by emitting all…of their elements or if an error occurs.…

To illustrate a Flux in action,…let's review the following marble diagram.…We're going to see what a successful operation looks like…for a Flux.…The Flux timeline goes from left to right…as it emits elements.…A thick vertical bar indicates…the Flux has completed successfully.…After applying the operator to each element in the Flux,…the result of the operation is another Flux…containing each transformed element.…

Now let's review a marble diagram…that shows a Flux that fails.…Very similar to the first example,…we have a Flux emitting items.…The operation is being performed…on each emitted item as before except,…when the original Flux emits the fourth item,…