GetTable与 Amazon SDK 或 CLI 配合使用 - Amazon Keyspaces(Apache Cassandra 兼容)
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GetTable与 Amazon SDK 或 CLI 配合使用

以下代码示例演示如何使用 GetTable

操作示例是大型程序的代码摘录,必须在上下文中运行。在以下代码示例中,您可以查看此操作的上下文:

.NET
Amazon SDK for .NET
注意

还有更多相关信息 GitHub。在 Amazon 代码示例存储库中查找完整示例,了解如何进行设置和运行。

/// <summary> /// Get information about an Amazon Keyspaces table. /// </summary> /// <param name="keyspaceName">The keyspace containing the table.</param> /// <param name="tableName">The name of the Amazon Keyspaces table.</param> /// <returns>The response containing data about the table.</returns> public async Task<GetTableResponse> GetTable(string keyspaceName, string tableName) { var response = await _amazonKeyspaces.GetTableAsync( new GetTableRequest { KeyspaceName = keyspaceName, TableName = tableName }); return response; }
  • 有关 API 的详细信息,请参阅 Amazon SDK for .NET API 参考GetTable中的。

Java
适用于 Java 2.x 的 SDK
注意

还有更多相关信息 GitHub。在 Amazon 代码示例存储库中查找完整示例,了解如何进行设置和运行。

public static void checkTable(KeyspacesClient keyClient, String keyspaceName, String tableName) throws InterruptedException { try { boolean tableStatus = false; String status; GetTableResponse response = null; GetTableRequest tableRequest = GetTableRequest.builder() .keyspaceName(keyspaceName) .tableName(tableName) .build(); while (!tableStatus) { response = keyClient.getTable(tableRequest); status = response.statusAsString(); System.out.println(". The table status is " + status); if (status.compareTo("ACTIVE") == 0) { tableStatus = true; } Thread.sleep(500); } List<ColumnDefinition> cols = response.schemaDefinition().allColumns(); for (ColumnDefinition def : cols) { System.out.println("The column name is " + def.name()); System.out.println("The column type is " + def.type()); } } catch (KeyspacesException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } }
  • 有关 API 的详细信息,请参阅 Amazon SDK for Java 2.x API 参考GetTable中的。

Kotlin
适用于 Kotlin 的 SDK
注意

还有更多相关信息 GitHub。在 Amazon 代码示例存储库中查找完整示例,了解如何进行设置和运行。

suspend fun checkTable(keyspaceNameVal: String?, tableNameVal: String?) { var tableStatus = false var status: String var response: GetTableResponse? = null val tableRequest = GetTableRequest { keyspaceName = keyspaceNameVal tableName = tableNameVal } KeyspacesClient { region = "us-east-1" }.use { keyClient -> while (!tableStatus) { response = keyClient.getTable(tableRequest) status = response!!.status.toString() println(". The table status is $status") if (status.compareTo("ACTIVE") == 0) { tableStatus = true } delay(500) } val cols: List<ColumnDefinition>? = response!!.schemaDefinition?.allColumns if (cols != null) { for (def in cols) { println("The column name is ${def.name}") println("The column type is ${def.type}") } } } }
  • 有关 API 的详细信息,请参阅适用GetTable于 K otlin 的Amazon SDK API 参考

Python
SDK for Python (Boto3)
注意

还有更多相关信息 GitHub。在 Amazon 代码示例存储库中查找完整示例,了解如何进行设置和运行。

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 get_table(self, table_name): """ Gets data about a table in the keyspace. :param table_name: The name of the table to look up. :return: Data about the table. """ try: response = self.keyspaces_client.get_table( keyspaceName=self.ks_name, tableName=table_name ) self.table_name = table_name except ClientError as err: if err.response["Error"]["Code"] == "ResourceNotFoundException": logger.info("Table %s does not exist.", table_name) self.table_name = None response = None else: logger.error( "Couldn't verify %s exists. Here's why: %s: %s", table_name, err.response["Error"]["Code"], err.response["Error"]["Message"], ) raise return response
  • 有关 API 的详细信息,请参阅适用GetTablePython 的Amazon SDK (Boto3) API 参考

有关 S Amazon DK 开发者指南和代码示例的完整列表,请参阅将 Amazon Keyspaces 与 SDK 配合使用 Amazon。本主题还包括有关入门的信息以及有关先前的 SDK 版本的详细信息。