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Showing content from https://docs.aws.amazon.com/AmazonCloudWatchLogs/latest/APIReference/API_DescribeExportTasks.html below:

DescribeExportTasks - Amazon CloudWatch Logs

DescribeExportTasks

Lists the specified export tasks. You can list all your export tasks or filter the results based on task ID or task status.

Request Syntax

{
   "limit": number,
   "nextToken": "string",
   "statusCode": "string",
   "taskId": "string"
}

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

The request accepts the following data in JSON format.

limit

The maximum number of items returned. If you don't specify a value, the default is up to 50 items.

Type: Integer

Valid Range: Minimum value of 1. Maximum value of 50.

Required: No

nextToken

The token for the next set of items to return. (You received this token from a previous call.)

Type: String

Length Constraints: Minimum length of 1.

Required: No

statusCode

The status code of the export task. Specifying a status code filters the results to zero or more export tasks.

Type: String

Required: No

taskId

The ID of the export task. Specifying a task ID filters the results to one or zero export tasks.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 512.

Required: No

Response Syntax

{
   "exportTasks": [ 
      { 
         "destination": "string",
         "destinationPrefix": "string",
         "executionInfo": { 
            "completionTime": number,
            "creationTime": number
         },
         "from": number,
         "logGroupName": "string",
         "status": { 
            "code": "string",
            "message": "string"
         },
         "taskId": "string",
         "taskName": "string",
         "to": number
      }
   ],
   "nextToken": "string"
}

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

exportTasks

The export tasks.

Type: Array of ExportTask objects

nextToken

The token for the next set of items to return. The token expires after 24 hours.

Type: String

Length Constraints: Minimum length of 1.

Errors

For information about the errors that are common to all actions, see Common Errors.

InvalidParameterException

A parameter is specified incorrectly.

HTTP Status Code: 400

ServiceUnavailableException

The service cannot complete the request.

HTTP Status Code: 500

Examples To list the export tasks that are complete

The following example lists the export tasks with the COMPLETE status.

Sample Request

POST / HTTP/1.1
Host: logs.<region>.<domain>
X-Amz-Date: <DATE>
Authorization: AWS4-HMAC-SHA256 Credential=<Credential>, SignedHeaders=content-type;date;host;user-agent;x-amz-date;x-amz-target;x-amzn-requestid, Signature=<Signature>
User-Agent: <UserAgentString>
Accept: application/json
Content-Type: application/x-amz-json-1.1
Content-Length: <PayloadSizeBytes>
Connection: Keep-Alive
X-Amz-Target: Logs_20140328.DescribeExportTasks
{
  "statusCode": "COMPLETE"
}

Sample Response

HTTP/1.1 200 OK
x-amzn-RequestId: <RequestId>
Content-Type: application/x-amz-json-1.1
Content-Length: <PayloadSizeBytes>
Date: <Date>
{
  "exportTasks": [
    {
      "taskId": "exampleTaskId",
      "taskName": "my-task-1",
      "logGroupName": "my-log-group",
      "from": 1437584472382,
      "to": 1437584472833,
      "destination": "my-destination",
      "destinationPrefix": "my-prefix",
      "status": 
        { 
          "code": "COMPLETE",
          "message": "Example message"
        },
      "executionInfo": 
        { 
          "creationTime": 1437584472856,
          "completionTime" : 1437584472986
        }
    },    
    {
      "taskId": "exampleTaskId",
      "taskName": "my-task-2",
      "logGroupName": "my-log-group",
      "from": 1437584472382,
      "to": 1437584472833,
      "destination": "my-destination",
      "destinationPrefix": "my-prefix",
      "status": 
        { 
          "code": "COMPLETE",
          "message": "Example message"
        },
      "executionInfo": 
        { 
          "creationTime": 1437584472856,
          "completionTime" : 1437584472986
        }
    }
  ]
}