How to connect DynamoDB using AWS and springboot example

To connect DynamoDB using AWS and Spring Boot, you can use the AWS SDK for Java.

 Here's an example code that shows how to connect to DynamoDB using Spring Boot: 

 1. Add the AWS SDK and DynamoDB dependency to your project. 

      You can do this by adding the following to your pom.xml file:

 

<dependency>
  <groupId>com.amazonaws</groupId>
  <artifactId>aws-java-sdk-dynamodb</artifactId>
  <version>1.12.91</version>
</dependency>

2. Create a configuration class that sets up the DynamoDB client. 

      Here's an example of how to create a configuration class:

 


@Configuration
public class DynamoDBConfig {

    @Value("${amazon.dynamodb.endpoint}")
    private String dynamoDBEndpoint;

    @Value("${amazon.aws.accesskey}")
    private String accessKey;

    @Value("${amazon.aws.secretkey}")
    private String secretKey;

    @Bean
    public AmazonDynamoDB amazonDynamoDB() {
        return AmazonDynamoDBClientBuilder.standard()
                .withEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration(dynamoDBEndpoint, "us-west-2"))
                .withCredentials(new AWSStaticCredentialsProvider(new BasicAWSCredentials(accessKey, secretKey)))
                .build();
    }
}

3. Use the DynamoDB client in your code. You can now use the DynamoDB client that you created in

     your code to interact with DynamoDB tables. 

     Here's an example of how to use the DynamoDB client to get an item from a table:

@RestController
public class MyController {

    private final AmazonDynamoDB amazonDynamoDB;

    public MyController(AmazonDynamoDB amazonDynamoDB) {
        this.amazonDynamoDB = amazonDynamoDB;
    }

    @GetMapping("/items/{id}")
    public String getItem(@PathVariable String id) {
        GetItemRequest getItemRequest = new GetItemRequest()
                .withTableName("my-table")
                .withKey(Collections.singletonMap("id", new AttributeValue().withS(id)));
        GetItemResult result = amazonDynamoDB.getItem(getItemRequest);
        return result.getItem().get("name").getS();
    }
}

This is just a simple example, but you can use the DynamoDB client to interact with a wide variety of DynamoDB operations, including putItem, deleteItem, query, and more.