Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions,
see Getting Started with Amazon Web Services in China
(PDF).
Use ListKeyspaces
with an Amazon SDK or CLI
The following code examples show how to use ListKeyspaces
.
Action examples are code excerpts from larger programs and must be run in context. You can see this action in
context in the following code example:
- .NET
-
- Amazon SDK for .NET
-
/// <summary>
/// Lists all keyspaces for the account.
/// </summary>
/// <returns>Async task.</returns>
public async Task ListKeyspaces()
{
var paginator = _amazonKeyspaces.Paginators.ListKeyspaces(new ListKeyspacesRequest());
Console.WriteLine("{0, -30}\t{1}", "Keyspace name", "Keyspace ARN");
Console.WriteLine(new string('-', Console.WindowWidth));
await foreach (var keyspace in paginator.Keyspaces)
{
Console.WriteLine($"{keyspace.KeyspaceName,-30}\t{keyspace.ResourceArn}");
}
}
- Java
-
- SDK for Java 2.x
-
public static void listKeyspacesPaginator(KeyspacesClient keyClient) {
try {
ListKeyspacesRequest keyspacesRequest = ListKeyspacesRequest.builder()
.maxResults(10)
.build();
ListKeyspacesIterable listRes = keyClient.listKeyspacesPaginator(keyspacesRequest);
listRes.stream()
.flatMap(r -> r.keyspaces().stream())
.forEach(content -> System.out.println(" Name: " + content.keyspaceName()));
} catch (KeyspacesException e) {
System.err.println(e.awsErrorDetails().errorMessage());
System.exit(1);
}
}
- Kotlin
-
- SDK for Kotlin
-
suspend fun listKeyspacesPaginator() {
KeyspacesClient { region = "us-east-1" }.use { keyClient ->
keyClient
.listKeyspacesPaginated(ListKeyspacesRequest {})
.transform { it.keyspaces?.forEach { obj -> emit(obj) } }
.collect { obj ->
println("Name: ${obj.keyspaceName}")
}
}
}
- Python
-
- SDK for Python (Boto3)
-
class KeyspaceWrapper:
"""Encapsulates Amazon Keyspaces (for Apache Cassandra) keyspace and table actions."""
def __init__(self, keyspaces_client):
"""
:param keyspaces_client: A Boto3 Amazon Keyspaces client.
"""
self.keyspaces_client = keyspaces_client
self.ks_name = None
self.ks_arn = None
self.table_name = None
@classmethod
def from_client(cls):
keyspaces_client = boto3.client("keyspaces")
return cls(keyspaces_client)
def list_keyspaces(self, limit):
"""
Lists the keyspaces in your account.
:param limit: The maximum number of keyspaces to list.
"""
try:
ks_paginator = self.keyspaces_client.get_paginator("list_keyspaces")
for page in ks_paginator.paginate(PaginationConfig={"MaxItems": limit}):
for ks in page["keyspaces"]:
print(ks["keyspaceName"])
print(f"\t{ks['resourceArn']}")
except ClientError as err:
logger.error(
"Couldn't list keyspaces. Here's why: %s: %s",
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
For a complete list of Amazon SDK developer guides and code examples, see
Using Amazon Keyspaces with an Amazon SDK.
This topic also includes information about getting started and details about previous SDK versions.