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Create Serverless API

Pragya Keshap answered on February 25, 2023 Popularity 9/10 Helpfulness 1/10

answer Create Serverless API

Create Serverless API

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public class CreateCustomerLambda {
private ObjectMapper objectMapper;
private DynamoDB dynamoDB;
private Table customersTable;
public CreateCustomerLambda() {
objectMapper = new ObjectMapper();
dynamoDB = new
DynamoDB(AmazonDynamoDBClientBuilder.defaultClient());
customersTable =
dynamoDB.getTable(System.getenv("CUSTOMERS_TABLE"));
}
public APIGatewayProxyResponseEvent
createCustomer(APIGatewayProxyRequestEvent request) throws Exception {
Customer customer = objectMapper.readValue(request.getBody(),
Customer.class);
Item item = new Item().withPrimaryKey("id", customer.getId())
.withString("firstName", customer.getFirstName())
.withString("lastName", customer.getLastName())
.withInt("rewardPoints", customer.getRewardPoints());
customersTable.putItem(item);
return new
APIGatewayProxyResponseEvent().withStatusCode(200).withBody(customer.get
Id().toString());
}
}
public class ReadCustomersLambda {
private ObjectMapper objectMapper;
private AmazonDynamoDB amazonDynamoDB;
public ReadCustomersLambda() {
objectMapper = new ObjectMapper();
amazonDynamoDB = AmazonDynamoDBClientBuilder.defaultClient();
}
public APIGatewayProxyResponseEvent
getOrders(APIGatewayProxyRequestEvent request) throws Exception {
ScanResult scanResult = amazonDynamoDB.scan(new
ScanRequest().withTableName(System.getenv("CUSTOMERS_TABLE")));
List<Customer> orders = scanResult
.getItems()
.stream()
.map(item -> new Customer(Long.parseLong(item.get("id").getN()),
item.get("firstName").getS(),
item.get("lastName").getS(),
Integer.parseInt(item.get("rewardPoints").getN())))
.collect(Collectors.toList());
return new
APIGatewayProxyResponseEvent().withStatusCode(200).withBody(objectMappe
r.writeValueAsString(orders));
}
}

Popularity 9/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: api java serverless

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Contributed on Feb 25 2023

Pragya Keshap

0 Answers Avg Quality 2/10

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