D'autres AWS SDK exemples sont disponibles dans le GitHub dépôt AWS Doc SDK Examples.
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Exemples de code pour Amazon Keyspaces utilisant AWS SDKs
Les exemples de code suivants vous montrent comment utiliser Amazon Keyspaces (pour Apache Cassandra) avec un kit de développement AWS logiciel (). SDK
Les principes de base sont des exemples de code qui vous montrent comment effectuer les opérations essentielles au sein d'un service.
Les actions sont des extraits de code de programmes plus larges et doivent être exécutées dans leur contexte. Les actions vous indiquent comment appeler des fonctions de service individuelles, mais vous pouvez les visualiser dans leur contexte dans les scénarios correspondants.
Ressources supplémentaires
Mise en route
Les exemples de code suivants montrent comment commencer à utiliser Amazon Keyspaces.
- .NET
-
- AWS SDK for .NET
-
namespace KeyspacesActions;
public class HelloKeyspaces
{
private static ILogger logger = null!;
static async Task Main(string[] args)
{
// Set up dependency injection for Amazon Keyspaces (for Apache Cassandra).
using var host = Host.CreateDefaultBuilder(args)
.ConfigureLogging(logging =>
logging.AddFilter("System", LogLevel.Debug)
.AddFilter<DebugLoggerProvider>("Microsoft", LogLevel.Information)
.AddFilter<ConsoleLoggerProvider>("Microsoft", LogLevel.Trace))
.ConfigureServices((_, services) =>
services.AddAWSService<IAmazonKeyspaces>()
.AddTransient<KeyspacesWrapper>()
)
.Build();
logger = LoggerFactory.Create(builder => { builder.AddConsole(); })
.CreateLogger<HelloKeyspaces>();
var keyspacesClient = host.Services.GetRequiredService<IAmazonKeyspaces>();
var keyspacesWrapper = new KeyspacesWrapper(keyspacesClient);
Console.WriteLine("Hello, Amazon Keyspaces! Let's list your keyspaces:");
await keyspacesWrapper.ListKeyspaces();
}
}
- Java
-
- SDKpour Java 2.x
-
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.keyspaces.KeyspacesClient;
import software.amazon.awssdk.services.keyspaces.model.KeyspaceSummary;
import software.amazon.awssdk.services.keyspaces.model.KeyspacesException;
import software.amazon.awssdk.services.keyspaces.model.ListKeyspacesRequest;
import software.amazon.awssdk.services.keyspaces.model.ListKeyspacesResponse;
import java.util.List;
/**
* Before running this Java (v2) code example, set up your development
* environment, including your credentials.
*
* For more information, see the following documentation topic:
*
* https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
*/
public class HelloKeyspaces {
public static void main(String[] args) {
Region region = Region.US_EAST_1;
KeyspacesClient keyClient = KeyspacesClient.builder()
.region(region)
.build();
listKeyspaces(keyClient);
}
public static void listKeyspaces(KeyspacesClient keyClient) {
try {
ListKeyspacesRequest keyspacesRequest = ListKeyspacesRequest.builder()
.maxResults(10)
.build();
ListKeyspacesResponse response = keyClient.listKeyspaces(keyspacesRequest);
List<KeyspaceSummary> keyspaces = response.keyspaces();
for (KeyspaceSummary keyspace : keyspaces) {
System.out.println("The name of the keyspace is " + keyspace.keyspaceName());
}
} catch (KeyspacesException e) {
System.err.println(e.awsErrorDetails().errorMessage());
System.exit(1);
}
}
}
- Kotlin
-
- SDKpour Kotlin
-
/**
Before running this Kotlin code example, set up your development environment, including your credentials.
For more information, see the following documentation topic:
https://docs.aws.amazon.com/sdk-for-kotlin/latest/developer-guide/setup.html
*/
suspend fun main() {
listKeyspaces()
}
suspend fun listKeyspaces() {
val keyspacesRequest =
ListKeyspacesRequest {
maxResults = 10
}
KeyspacesClient { region = "us-east-1" }.use { keyClient ->
val response = keyClient.listKeyspaces(keyspacesRequest)
response.keyspaces?.forEach { keyspace ->
println("The name of the keyspace is ${keyspace.keyspaceName}")
}
}
}
- Python
-
- SDKpour Python (Boto3)
-
import boto3
def hello_keyspaces(keyspaces_client):
"""
Use the AWS SDK for Python (Boto3) to create an Amazon Keyspaces (for Apache Cassandra)
client and list the keyspaces in your account.
This example uses the default settings specified in your shared credentials
and config files.
:param keyspaces_client: A Boto3 Amazon Keyspaces Client object. This object wraps
the low-level Amazon Keyspaces service API.
"""
print("Hello, Amazon Keyspaces! Let's list some of your keyspaces:\n")
for ks in keyspaces_client.list_keyspaces(maxResults=5).get("keyspaces", []):
print(ks["keyspaceName"])
print(f"\t{ks['resourceArn']}")
if __name__ == "__main__":
hello_keyspaces(boto3.client("keyspaces"))