搭DiscoverInputSchema配 AWS SDK或使用 CLI - AWS SDK 程式碼範例

AWS 文檔 AWS SDK示例 GitHub 回購中有更多SDK示例。

本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。

搭DiscoverInputSchema配 AWS SDK或使用 CLI

下列程式碼範例會示範如何使用DiscoverInputSchema。

Python
SDK對於 Python（肉毒桿菌 3）
注意

還有更多關於 GitHub。尋找完整範例，並了解如何在AWS 設定和執行程式碼範例儲存庫。

class KinesisAnalyticsApplicationV2:
    """Encapsulates Kinesis Data Analytics application functions."""

    def __init__(self, analytics_client):
        """
        :param analytics_client: A Boto3 Kinesis Data Analytics v2 client.
        """
        self.analytics_client = analytics_client
        self.name = None
        self.arn = None
        self.version_id = None
        self.create_timestamp = None


    def discover_input_schema(self, stream_arn, role_arn):
        """
        Discovers a schema that maps data in a stream to a format that is usable by
        an application's runtime environment. The stream must be active and have
        enough data moving through it for the service to sample. The returned schema
        can be used when you add the stream as an input to the application or you can
        write your own schema.

        :param stream_arn: The ARN of the stream to map.
        :param role_arn: A role that lets Kinesis Data Analytics read from the stream.
        :return: The discovered schema of the data in the input stream.
        """
        try:
            response = self.analytics_client.discover_input_schema(
                ResourceARN=stream_arn,
                ServiceExecutionRole=role_arn,
                InputStartingPositionConfiguration={"InputStartingPosition": "NOW"},
            )
            schema = response["InputSchema"]
            logger.info("Discovered input schema for stream %s.", stream_arn)
        except ClientError:
            logger.exception(
                "Couldn't discover input schema for stream %s.", stream_arn
            )
            raise
        else:
            return schema

  • 如需詳API細資訊，請參閱DiscoverInputSchema中AWS SDK的〈〉以取得 Python (Boto3) API 參考資料。