February 2018
Intermediate to advanced
552 pages
13h 46m
English
Content preview from Scala Reactive Programming
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An Event Stream
An Event Stream is a streams or a data store for storing all those system events. It is a sequence of events generated by the system. It stores events sequentially:
When a user queries the current state of an entity of the system, then the system queries the Event Stream to get a list of events generated to that entity. The system runs or executes all those events one by one to get the current state of the entity.
Let's explore it with a WF (Weather Forecasting) system. For a specific hour of the current day, the WF system has the following events:
- Event-1(Day=Current Day, Hour=11, "Temperature set 20 Degrees")
- Event-2(Day=Current ...
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