Streaming messaging data

You can configure an AppInstance to receive data, such as messages and channel events, in the form of a stream. You can then react to that data in real time. Currently, Amazon Chime SDK messaging only accepts Kinesis streams as stream destinations. You must have these prerequisites to use Kinesis streams with this feature:

• Kinesis streams must be in the same AWS account as the AppInstance.

• A stream must be in the same region as the AppInstance.

• Stream names have a prefix that starts with chime-messaging-.

• You must configure at least two shards. Each shard can receive data up to 1MB per second, so scale your stream accordingly.

• You must enable server-side encryption (SSE).

To configure a Kinesis stream

1. Create one or more Kinesis streams using the prerequisites in the previous section, then get the ARN. Ensure the caller has Kinesis permissions in addition to Amazon Chime permissions.

   The following examples show how to use the AWS CLI to create a Kinesis stream with two shards, and how to enable SSE.

   aws kinesis create-stream --stream-name chime-messaging-unique-name --shard-count 2

   aws kinesis start-stream-encryption --stream-name chime-messaging-unique-name --encryption-type KMS --key-id "alias/aws/kinesis"

2. Configure streaming by calling the PutMessagingStreamingConfigurations API.

   You can configure one or both of two data types, and you can choose the same stream or separate streams for them.

   The following examples show how to use the AWS CLI to configure an appinstance to stream the ChannelMessage and Channel data types.

   aws chime-sdk-messaging put-messaging-streaming-configurations --app-instance-arn app_instance_arn \
   --streaming-configurations DataType=ChannelMessage,ResourceArn=kinesis_data_stream_arn

   aws chime-sdk-messaging put-messaging-streaming-configurations --app-instance-arn app_instance_arn \
   --streaming-configurations DataType=Channel,ResourceArn=kinesis_data_stream_arn

   The data types have the following scopes:

   DataType	Event types generated
   ChannelMessage	CREATE_CHANNEL_MESSAGE
   	REDACT_CHANNEL_MESSAGE
   	UPDATE_CHANNEL_MESSAGE
   	DELETE_CHANNEL_MESSAGE
   Channel	CREATE_CHANNEL
   	CREATE_SUB_CHANNEL
   	UPDATE_CHANNEL
   	DELETE_CHANNEL
   	UPDATE_CHANNEL_EXPIRATION_SETTINGS
   	DELETE_SUB_CHANNEL
   	CREATE_CHANNEL_MEMBERSHIP
   	DELETE_CHANNEL_MEMBERSHIP
   	CREATE_CHANNEL_BAN
   	DELETE_CHANNEL_BAN
   	CREATE_CHANNEL_MODERATOR
   	DELETE_CHANNEL_MODERATOR

3. Start reading the data from your configured Kinesis stream.

   Note

   Any events sent before you configure streaming are not sent to your Kinesis stream.

Data format

Kinesis outputs records in JSON format with the following fields: EventType and Payload. The payload format depends on the EventType. The following table lists the event types and their corresponding payload formats.

EventType	Payload format
CREATE_CHANNEL_MESSAGE	Channel message
REDACT_CHANNEL_MESSAGE
UPDATE_CHANNEL_MESSAGE
DELETE_CHANNEL_MESSAGE
CREATE_CHANNEL	Channel
UPDATE_CHANNEL
DELETE_CHANNEL
UPDATE_CHANNEL_EXPIRATION_SETTINGS
CREATE_CHANNEL_MEMBERSHIP	ChannelMembership
DELETE_CHANNEL_MEMBERSHIP
CREATE_CHANNEL_BAN	ChannelBan
DELETE_CHANNEL_BAN
CREATE_CHANNEL_MODERATOR	ChannelModerator
DELETE_CHANNEL_MODERATOR
CREATE_SUB_CHANNEL	channelARN SubChannelId
DELETE_SUB_CHANNEL