[ aws . iotanalytics ]

list-channels

Description

Retrieves a list of channels.

See also: AWS API Documentation

See ‘aws help’ for descriptions of global parameters.

list-channels is a paginated operation. Multiple API calls may be issued in order to retrieve the entire data set of results. You can disable pagination by providing the --no-paginate argument. When using --output text and the --query argument on a paginated response, the --query argument must extract data from the results of the following query expressions: channelSummaries

Synopsis

  list-channels
[--cli-input-json | --cli-input-yaml]
[--starting-token <value>]
[--page-size <value>]
[--max-items <value>]
[--generate-cli-skeleton <value>]

Options

--cli-input-json | --cli-input-yaml (string) Reads arguments from the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, those values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally. This may not be specified along with --cli-input-yaml.

--starting-token (string)

A token to specify where to start paginating. This is the NextToken from a previously truncated response.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--page-size (integer)

The size of each page to get in the AWS service call. This does not affect the number of items returned in the command’s output. Setting a smaller page size results in more calls to the AWS service, retrieving fewer items in each call. This can help prevent the AWS service calls from timing out.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--max-items (integer)

The total number of items to return in the command’s output. If the total number of items available is more than the value specified, a NextToken is provided in the command’s output. To resume pagination, provide the NextToken value in the starting-token argument of a subsequent command. Do not use the NextToken response element directly outside of the AWS CLI.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. Similarly, if provided yaml-input it will print a sample input YAML that can be used with --cli-input-yaml. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

See ‘aws help’ for descriptions of global parameters.

Examples

To retrieve a list of channels

The following list-channels example displays summary information for the available channels.

aws iotanalytics list-channels

Output:

{
    "channelSummaries": [
        {
            "status": "ACTIVE",
            "channelName": "mychannel",
            "creationTime": 1557860351.001,
            "lastUpdateTime": 1557860351.001
        }
    ]
}

For more information, see ListChannels in the AWS IoT Analytics API Reference.

Output

channelSummaries -> (list)

A list of ChannelSummary objects.

(structure)

A summary of information about a channel.

channelName -> (string)

The name of the channel.

channelStorage -> (structure)

Where channel data is stored.

serviceManagedS3 -> (structure)

Used to store channel data in an S3 bucket managed by IoT Analytics.

customerManagedS3 -> (structure)

Used to store channel data in an S3 bucket that you manage.

bucket -> (string)

The name of the S3 bucket in which channel data is stored.

keyPrefix -> (string)

(Optional) The prefix used to create the keys of the channel data objects. Each object in an S3 bucket has a key that is its unique identifier within the bucket (each object in a bucket has exactly one key). The prefix must end with a forward slash (/).

roleArn -> (string)

The ARN of the role that grants IoT Analytics permission to interact with your Amazon S3 resources.

status -> (string)

The status of the channel.

creationTime -> (timestamp)

When the channel was created.

lastUpdateTime -> (timestamp)

The last time the channel was updated.

lastMessageArrivalTime -> (timestamp)

The last time when a new message arrived in the channel.

IoT Analytics updates this value at most once per minute for one channel. Hence, the lastMessageArrivalTime value is an approximation.

This feature only applies to messages that arrived in the data store after October 23, 2020.

nextToken -> (string)

The token to retrieve the next set of results, or null if there are no more results.