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Clojure Polymorphism

You're reading from   Clojure Polymorphism Leverage Clojure's polymorphic tools to develop your applications

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Product type Paperback
Published in Nov 2019
Publisher
ISBN-13 9781838982362
Length 56 pages
Edition 1st Edition
Languages
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Author (1):
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Paul Stadig Paul Stadig
Author Profile Icon Paul Stadig
Paul Stadig
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Toc

Plain Functions + Client Namespace

A variation on using plain functions would be to return a map that contains the implementation functions:

1 (ns stadig.storage.s3

2   (:refer-clojure :exclude [get])

3   (:require

4    [aws.sdk.s3 :as s3]))

5

6 (defn get

7   [conn bucket key]

8   (s3/get-object conn bucket key))

9

10 (defn put

11   [conn bucket key value]

12   (s3/put-object conn bucket key value))

13

14 (defn delete

15   [conn bucket key]

16   (s3/delete-object conn bucket key))

17

18 (defn close

19   [conn])

20

21 (defn connect

22   [access-key secret-key]

23   (let [conn {:access-key access-key :secret-key secret-key}]

24     {:get (partial get conn)

25      :put (partial put conn)

26      :delete (partial delete conn)

27 ...

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