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CreateTableCompositeKey

Pragya Keshap answered on February 13, 2023 Popularity 1/10 Helpfulness 1/10

answer CreateTableCompositeKey

CreateTableCompositeKey

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https://github.com/awsdocs/aws-doc-sdk-examples/blob/main/javav2/example_code/dynamodb/src/main/java/com/example/dynamodb/CreateTableCompositeKey.java

public class CreateTableCompositeKey {

    public static void main(String[] args) {

        final String usage = "\n" +
            "Usage:\n" +
            "    <tableName>\n\n" +
            "Where:\n" +
            "    tableName - The Amazon DynamoDB table to create (for example, Music3).\n\n";

        if (args.length != 1) {
            System.out.println(usage);
            System.exit(1);
        }

        String tableName = args[0];
        ProfileCredentialsProvider credentialsProvider = ProfileCredentialsProvider.create();
        Region region = Region.US_EAST_1;
        DynamoDbClient ddb = DynamoDbClient.builder()
            .credentialsProvider(credentialsProvider)
            .region(region)
            .build();

        System.out.format("Creating Amazon DynamoDB table %s\n with a composite primary key:\n", tableName);
        System.out.format("* Language - partition key\n");
        System.out.format("* Greeting - sort key\n");
        String tableId =createTableComKey(ddb,tableName);
        System.out.println("The Amazon DynamoDB table Id value is "+tableId);
        ddb.close();
    }

    // snippet-start:[dynamodb.java2.create_table_composite_key.main]
    public static String createTableComKey(DynamoDbClient ddb, String tableName) {
        CreateTableRequest request = CreateTableRequest.builder()
            .attributeDefinitions(AttributeDefinition.builder()
                .attributeName("Language")
                .attributeType(ScalarAttributeType.S)
                .build(),
            AttributeDefinition.builder()
                .attributeName("Greeting")
                .attributeType(ScalarAttributeType.S)
                .build())
            .keySchema(KeySchemaElement.builder()
                .attributeName("Language")
                .keyType(KeyType.HASH)
                .build(),
            KeySchemaElement.builder()
                .attributeName("Greeting")
                .keyType(KeyType.RANGE)
                .build())
            .provisionedThroughput(ProvisionedThroughput.builder()
                .readCapacityUnits(new Long(10))
                .writeCapacityUnits(new Long(10)).build())
            .tableName(tableName)
            .build();

       String tableId = "";
       try {
           CreateTableResponse result = ddb.createTable(request);
           tableId = result.tableDescription().tableId();
           return tableId;
        } catch (DynamoDbException e) {
            System.err.println(e.getMessage());
            System.exit(1);
        }
       return "";
    }
    // snippet-end:[dynamodb.java2.create_table_composite_key.main]
}

Popularity 1/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java

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Contributed on Feb 13 2023

Pragya Keshap

0 Answers Avg Quality 2/10

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