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Function Decomposition

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Help Center/ MapReduce Service/ Developer Guide (Normal_3.x)/ Storm Development Guide (Security Mode)/ Developing an Application/ Development Idea

Development Idea

Updated on 2022-09-14 GMT+08:00

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Function Decomposition

The procedure for a user to develop an application to calculate the number of times that each word appears in random text is as Table 1:

**Table 1** Functions to be developed
No.	Procedure	Code Sample
1	Create a Spout to generate random text.	For details, see Creating a Spout.
2	Create a Bolt to split the random text into words.	For details, see Creating a Bolt.
3	Create a Blot to calculate the number of times that each word appears.	For details, see Creating a Bolt.
4	Create a Topology.	For details, see Creating a Topology.

For details about certain code, see Code Samples. For details about complete code, see the storm-examples project.

Parent topic: Developing an Application

Previous topic: Typical Scenario Description

Next topic: Example Code Description

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