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DynamoDB Cookbook

You're reading from   DynamoDB Cookbook Over 90 hands-on recipes to design Internet scalable web and mobile applications with Amazon DynamoDB

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Product type Paperback
Published in Sep 2015
Publisher
ISBN-13 9781784393755
Length 266 pages
Edition 1st Edition
Concepts
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Author (1):
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Tanmay Deshpande Tanmay Deshpande
Author Profile Icon Tanmay Deshpande
Tanmay Deshpande
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Table of Contents (12) Chapters Close

Preface 1. Taking Your First Steps with DynamoDB FREE CHAPTER 2. Operating with DynamoDB Tables 3. Manipulating DynamoDB Items 4. Managing DynamoDB Indexes 5. Exploring Higher Level Programming Interfaces for DynamoDB 6. Securing DynamoDB 7. DynamoDB Best Practices 8. Integrating DynamoDB with other AWS Services 9. Developing Web Applications using DynamoDB 10. Developing Mobile Applications using DynamoDB Index

Retrieving items from the DynamoDB table using the object persistence model in .Net


Now, we will see how to use the object persistence model in .Net to get the data from DynamoDB.

Getting ready

To perform this recipe, you should have set up the project, as described in the earlier recipes, specifically, pom.xml, dependencies, and the object model.

How to do it…

  1. Create an instance of AmazonDynamoDBClient and instantiate the DynamoDBContext class, which will be the entry point to DynamoDB:

    AmazonDynamoDBClient client = new AmazonDynamoDBClient();
    DynamoDBContext context = new DynamoDBContext(client);
  2. Invoke the load method from the DynamoDBContext class, specifying the keys of a DynamoDB item that you wish to retrieve:

    Product productRetrieved = context.Load<Product>(111, "book");

How it works…

The AWS SDK internally calls the HTTP APIs to perform the operations. The load method retrieves the data from DynamoDB and puts it into the object that we created. To retrieve a specific attribute of the...

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