April 2019
Intermediate to advanced
360 pages
9h 17m
English
Content preview from Hands-On Design Patterns with Java
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Input-Map-Output
The Input-Map-Output form of the MapReduce functional design pattern can be used without the reduce component. This will be implemented when there is a need to change data formats and not perform aggregate calculations. An overview of the process is provided in the following diagram:
MapReduce design pattern—Input-Map-Output
To demonstrate this approach, we will use the scenario of a faculty registry system that is being cleaned up. We will handle each step in this pattern in the subsections that follow.
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