Amazon Web Services | AWS DynamoDB | Spring Boot | Example | Simple Programming

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Spring Boot AWS DynamoDB Example

In this video tutorial, let us see how to use DynamoDB in spring boot application

DynamoDB is a Document style database. In other words semi-structured database

It has the capability to scale depending upon the size of data

And it supports 35 levels of nesting on data

Data is stored in solid state drives, and is spread across 2 geographical datacenter so data can never be lost

You can use DynamoDB directly from the cloud environment or you can use the dynamodb local a downloadable version provided by amazon

in this example, we are going to directly connect and work with the cloud version


Create a AWS account to access the aws console and create a table in DynamoDB

DynamoDB supports two types of primary key attributes

single attribute - Hash Key
this hash key is used to calculate the hash value which is then used to determine the physical location where the data will be stored
no two keys can have same values in single attribute
composite attribute - Hash Key + Range Key
this is a combination of hash key and a range key.
two items can have same hash key but different range key

DynamoDBMapper is a Object mapper for domain-object interaction with DynamoDB.

DynamoDBSaveExpression - you can use this to adding multiple expressions for your need.
For example, you may want to save only if an attribute has a particular value.

ExpectedValue - it represent a condition to be compared with an attribute value