Data Federation Service API Overview¶

EnOS Data Federation service enables application developers and data analysts to query data from and write files to multi-source heterogeneous data storage systems. The data federation service APIs support querying the created data reading and writing channels, reading data from storages, and writing files to storages. For more information about the Data Federation service, see Data Federation.

For detailed information about EnOS APIs, see About EnOS API.

To get started with calling an EnOS API quickly, see Get Started with EnOS API.

Refer to the table below for the list of APIs, and whether they can be used by EnOS Cloud and EnOS Edge.

API List¶

API Name	Description	EnOS Cloud	EnOS Edge
List Channels	Get the list of channels (Read and Write) to which the application is authorized.	√	×
Read Data	Read data by providing SQL query through the specified channel.	√	×
List Jobs	Get the data reading jobs or data writing jobs of a specified channel.	√	×
Get Job Details	Get detailed information of a data reading job or a data writing job.	√	×
Write Message	Write message to data source through a specified channel.	√	×
Write Chunk File	Write file chunks to data source through a specified channel.	√	×
Operate Channel	Start or stop a read channel or write channel.	√	×
Create Download Request	Create a file download task.	√	×
Get Download Status	Get the status of a file download task.	√	×
Cancel Download	Cancel a file download task.	√	×

Common Error Code¶

Code	Description
81500	Internal service error.
81400	Channel or data source exception.
81404	Channel or data source does not exist.