Updating a table using the AWS SDK for Java_DynamoDB Cookbook-QQ阅读男频科幻网

书名：DynamoDB Cookbook
作者名：Tanmay Deshpande
本章字数：193字
更新时间：2025-02-27 18:05:23

Updating a table using the AWS SDK for Java

Now, let's understand how to update a DynamoDB table using the AWS SDK for Java.

Getting ready…

You can use the IDE of your choice to code these recipes.

How to do it…

In this recipe, we will learn how to update the already created DynamoDB table. Here, we will update the read and write capacity units:

Create an instance of the Table class and initiate it by calling the getTable method:

AmazonDynamoDBClient client = new AmazonDynamoDBClient(new ProfileCredentialsProvider());
client.setRegion(Region.getRegion(Regions.US_EAST_1));
DynamoDB dynamoDB = new DynamoDB(client);
Table table = dynamoDB.getTable("productTableJava");

Now, create an instance of the provisioned throughput, and set the read and write capacity units. Earlier, we set the read and write capacity units to one, and now we will update it to two:
```
ProvisionedThroughput provisionedThroughput = new ProvisionedThroughput().withReadCapacityUnits(2L).withWriteCapacityUnits(2L);
```
Now, invoke the updateTable method to see the changes in the DynamoDB table:
```
table.updateTable(provisionedThroughput);
```
It takes time to make the changes effective, so it's good practice to wait until the table becomes active again:
```
table.waitForActive();
```

How it works…

Once we invoke these APIs, the AWS SDK updates the table with the new changes.