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