这是indexloc提供的服务，不要输入任何密码
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BAEL-9218 - Query in DynamoDB on the basis of HashKey and Range Key #18485

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Apr 22, 2025
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BAEL-9218 - Query in DynamoDB on the basis of HashKey and Range Key #18485

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BAEL-9218 - Query in DynamoDB on the basis of HashKey and Range Key
Alexandru-Borza Apr 17, 2025
e16e2f6
BAEL-9218 - clean up
Alexandru-Borza Apr 17, 2025
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18 changes: 18 additions & 0 deletions aws-modules/aws-dynamodb/pom.xml
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Expand Up @@ -36,6 +36,24 @@
<artifactId>gson</artifactId>
<version>${gson.version}</version>
</dependency>
<dependency>
<groupId>software.amazon.awssdk</groupId>
<artifactId>dynamodb</artifactId>
<version>2.31.23</version>
</dependency>
<dependency>
<groupId>org.testcontainers</groupId>
<artifactId>localstack</artifactId>
<version>1.20.6</version>
<scope>test</scope>
</dependency>

<dependency>
<groupId>org.testcontainers</groupId>
<artifactId>testcontainers</artifactId>
<version>1.20.6</version>
<scope>test</scope>
</dependency>
</dependencies>

<build>
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67 changes: 67 additions & 0 deletions aws-modules/aws-dynamodb/src/main/java/com/baeldung/dynamodb/query/UserOrdersRepository.java
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package com.baeldung.dynamodb.query;
import software.amazon.awssdk.services.dynamodb.DynamoDbClient;
import software.amazon.awssdk.services.dynamodb.model.*;

import java.util.*;

public class UserOrdersRepository {

private final DynamoDbClient dynamoDb;
private static final String TABLE_NAME = "UserOrders";

public UserOrdersRepository(DynamoDbClient dynamoDb) {
this.dynamoDb = dynamoDb;
}

public List<Map<String, AttributeValue>> getOrdersByUserId(String userId) {
QueryRequest request = QueryRequest.builder()
.tableName(TABLE_NAME)
.keyConditionExpression("userId = :uid")
.expressionAttributeValues(Map.of(
":uid", AttributeValue.fromS(userId)
))
.build();

return dynamoDb.query(request).items();
}

public List<Map<String, AttributeValue>> getOrdersAfterDate(String userId, String startDate) {
QueryRequest request = QueryRequest.builder()
.tableName(TABLE_NAME)
.keyConditionExpression("userId = :uid AND orderDate > :startDate")
.expressionAttributeValues(Map.of(
":uid", AttributeValue.fromS(userId),
":startDate", AttributeValue.fromS(startDate)
))
.build();

return dynamoDb.query(request).items();
}

public List<Map<String, AttributeValue>> getOrdersBetweenDates(String userId, String fromDate, String toDate) {
QueryRequest request = QueryRequest.builder()
.tableName(TABLE_NAME)
.keyConditionExpression("userId = :uid AND orderDate BETWEEN :from AND :to")
.expressionAttributeValues(Map.of(
":uid", AttributeValue.fromS(userId),
":from", AttributeValue.fromS(fromDate),
":to", AttributeValue.fromS(toDate)
))
.build();

return dynamoDb.query(request).items();
}

public List<Map<String, AttributeValue>> getOrdersByMonth(String userId, String monthPrefix) {
QueryRequest request = QueryRequest.builder()
.tableName(TABLE_NAME)
.keyConditionExpression("userId = :uid AND begins_with(orderDate, :prefix)")
.expressionAttributeValues(Map.of(
":uid", AttributeValue.fromS(userId),
":prefix", AttributeValue.fromS(monthPrefix)
))
.build();

return dynamoDb.query(request).items();
}
}
117 changes: 117 additions & 0 deletions ...namodb/src/test/java/com/baeldung/dynamodb/query/UserOrdersRepositoryIntegrationTest.java
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package com.baeldung.dynamodb.query;

import org.junit.jupiter.api.*;
import org.testcontainers.containers.localstack.LocalStackContainer;
import org.testcontainers.utility.DockerImageName;
import software.amazon.awssdk.auth.credentials.AwsBasicCredentials;
import software.amazon.awssdk.auth.credentials.StaticCredentialsProvider;
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.dynamodb.DynamoDbClient;
import software.amazon.awssdk.services.dynamodb.model.*;

import java.util.*;
import java.util.stream.Collectors;

import static org.junit.jupiter.api.Assertions.*;

@TestInstance(TestInstance.Lifecycle.PER_CLASS)
public class UserOrdersRepositoryIntegrationTest {

private static final String TABLE_NAME = "UserOrders";
private DynamoDbClient dynamoDb;
private UserOrdersRepository repository;

private final LocalStackContainer localstack = new LocalStackContainer(
DockerImageName.parse("localstack/localstack:latest"))
.withServices(LocalStackContainer.Service.DYNAMODB);

@BeforeAll
void setUp() {
localstack.start();

dynamoDb = DynamoDbClient.builder()
.endpointOverride(localstack.getEndpointOverride(LocalStackContainer.Service.DYNAMODB))
.credentialsProvider(StaticCredentialsProvider.create(AwsBasicCredentials.create("test", "test")))
.region(Region.of(localstack.getRegion()))
.build();

repository = new UserOrdersRepository(dynamoDb);

createTable();
seedData();
}

void createTable() {
dynamoDb.createTable(CreateTableRequest.builder()
.tableName(TABLE_NAME)
.keySchema(
KeySchemaElement.builder().attributeName("userId").keyType(KeyType.HASH).build(),
KeySchemaElement.builder().attributeName("orderDate").keyType(KeyType.RANGE).build()
)
.attributeDefinitions(
AttributeDefinition.builder().attributeName("userId").attributeType(ScalarAttributeType.S).build(),
AttributeDefinition.builder().attributeName("orderDate").attributeType(ScalarAttributeType.S).build()
)
.provisionedThroughput(
ProvisionedThroughput.builder().readCapacityUnits(5L).writeCapacityUnits(5L).build()
)
.build());

dynamoDb.waiter().waitUntilTableExists(r -> r.tableName(TABLE_NAME));
}

void seedData() {
putOrder("2024-12-01", "Laptop");
putOrder("2024-12-15", "Monitor");
putOrder("2025-01-05", "Mouse");
putOrder("2025-01-20", "Keyboard");
}

void putOrder(String orderDate, String itemName) {
dynamoDb.putItem(PutItemRequest.builder()
.tableName(TABLE_NAME)
.item(Map.of(
"userId", AttributeValue.fromS("user1"),
"orderDate", AttributeValue.fromS(orderDate),
"item", AttributeValue.fromS(itemName)
))
.build());
}

@Test
void givenUserId_whenGetOrdersByUserId_thenReturnAllUserOrders() {
List<Map<String, AttributeValue>> items = repository.getOrdersByUserId("user1");
assertEquals(4, items.size());
}

@Test
void givenStartDate_whenGetOrdersAfterDate_thenReturnOnlyNewerOrders() {
List<Map<String, AttributeValue>> items = repository.getOrdersAfterDate("user1", "2025-01-01");
List<String> names = items.stream().map(i -> i.get("item").s()).collect(Collectors.toList());

assertEquals(List.of("Mouse", "Keyboard"), names);
}

@Test
void givenDateRange_whenGetOrdersBetweenDates_thenReturnOrdersInRange() {
List<Map<String, AttributeValue>> items = repository.getOrdersBetweenDates("user1", "2024-12-01", "2024-12-31");
List<String> names = items.stream().map(i -> i.get("item").s()).collect(Collectors.toList());

assertEquals(List.of("Laptop", "Monitor"), names);
}

@Test
void givenMonthPrefix_whenGetOrdersByMonth_thenReturnMonthlyOrders() {
List<Map<String, AttributeValue>> items = repository.getOrdersByMonth("user1", "2025-01");
List<String> names = items.stream().map(i -> i.get("item").s()).collect(Collectors.toList());

assertEquals(List.of("Mouse", "Keyboard"), names);
}

@AfterAll
void tearDown() {
if (localstack != null) {
localstack.stop();
}
}
}