# Understanding Amazon Chime SDK meeting lifecycle events
Understanding meeting lifecycle events

The Amazon Chime SDK sends meeting lifecycle events, which you can use to trigger notifications and initiate downstream workflows. Some examples of using meeting events include: 
+ Updating metadata when an attendee joins or leaves an Amazon Chime SDK meeting.
+ Implementing push notifications or rosters for an Amazon Chime SDK meeting.
+ Measuring the usage of video and content sharing in Amazon Chime SDK meetings.

You can send events to Amazon EventBridge, Amazon Simple Notification Service (SNS), and Amazon Simple Queue Service (SQS). For more information, refer to [Events from AWS services](https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-service-event.html) in the *Amazon EventBridge User Guide*.

## Amazon Chime SDK meeting starts


The Amazon Chime SDK sends this event when a new meeting starts.

**Example Event data**  
The following example shows the data for this event.  

```
{
  "version": "0",
  "source": "aws.chime",
  "account": "111122223333",  
  "region": "us-east-1",
  "detail-type": "Chime Meeting State Change",
  "time": "yyyy-mm-ddThh:mm:ssZ",
  "resources": []
  "detail": {
    "version": "0",
    "eventType": "chime:MeetingStarted",
    "timestamp": 12344566754,
    "meetingId": "87654321-4321-4321-1234-111122223333",    
    "externalMeetingId": "87654321-4321-4321-1234-111122223333",
    "mediaRegion": "us-east-1"
  }
}
```

## Amazon Chime SDK meeting ends


The Amazon Chime SDK sends this event when an active meeting ends.

**Note**  
For efficiency, the service also sends this event when you call the [https://docs.aws.amazon.com/chime-sdk/latest/APIReference/API_meeting-chime_DeleteMeeting.html](https://docs.aws.amazon.com/chime-sdk/latest/APIReference/API_meeting-chime_DeleteMeeting.html) API.

**Example Event data**  
The following example shows the data for this event.  

```
{
  "version": "0",
  "source": "aws.chime",
  "account": "111122223333",  
  "region": "us-east-1",
  "detail-type": "Chime Meeting State Change",
  "time": "yyyy-mm-ddThh:mm:ssZ",
  "resources": []
  "detail": {
    "version": "0",
    "eventType": "chime:MeetingEnded",
    "timestamp": 12344566754,
    "meetingId": "87654321-4321-4321-1234-111122223333",    
    "externalMeetingId": "87654321-4321-4321-1234-111122223333",
    "mediaRegion": "us-east-1"
  }
}
```

## Amazon Chime SDK attendee is added


The Amazon Chime SDK sends this event when a new attendee is added to an active meeting.

**Example Event data**  
The following example shows the data for this event.  

```
{
  "version": "0",
  "source": "aws.chime",
  "account": "111122223333",  
  "region": "us-east-1",
  "detail-type": "Chime Meeting State Change",
  "time": "yyyy-mm-ddThh:mm:ssZ",
  "resources": []
  "detail": {
    "version": "0",
    "eventType": "chime:AttendeeAdded",
    "timestamp": 12344566754,
    "meetingId": "87654321-4321-4321-1234-111122223333",
    "attendeeId": "87654321-4321-4321-1234-111122223333",
    "externalUserId": "87654321-4321-4321-1234-111122223333",
    "externalMeetingId": "87654321-4321-4321-1234-111122223333",
    "mediaRegion": "us-east-1"
  }
}
```

## Amazon Chime SDK attendee is deleted


The Amazon Chime SDK sends this event when you use the [https://docs.aws.amazon.com/chime-sdk/latest/APIReference/API_meeting-chime_DeleteAttendee.html](https://docs.aws.amazon.com/chime-sdk/latest/APIReference/API_meeting-chime_DeleteAttendee.html) API to remove an attendee from an active meeting. 

**Example Event data**  
The following example shows the data for this event.  

```
{
  "version": "0",
  "source": "aws.chime",
  "account": "111122223333", 
  "region": "us-east-1",
  "detail-type": "Chime Meeting State Change",
  "time": "yyyy-mm-ddThh:mm:ssZ",
  "resources": []
  "detail": {
    "version": "0",
    "eventType": "chime:AttendeeDeleted",
    "timestamp": 12344566754,
    "meetingId": "87654321-4321-4321-1234-111122223333",
    "attendeeId": "87654321-4321-4321-1234-111122223333",
    "externalUserId": "87654321-4321-4321-1234-111122223333",
    "externalMeetingId": "87654321-4321-4321-1234-111122223333",
    "mediaRegion": "us-east-1"
  }
}
```

## Amazon Chime SDK attendee is authorized


The Amazon Chime SDK sends this event when a user, already joined to the meeting, uses the same join token to join the meeting again. For example, a user may switch from a desktop machine to a mobile device. This effectively "hands off" the meeting to the new device. 

**Example Event data**  
The following example shows the data for this event.  

```
{
  "version": "0",
  "source": "aws.chime",
  "account": "111122223333",  
  "region": "us-east-1",
  "detail-type": "Chime Meeting State Change",
  "time": "yyyy-mm-ddThh:mm:ssZ",
  "resources": []
  "detail": {
    "version": "0",
    "eventType": "chime:AttendeeAuthorized",
    "timestamp": 12344566754,
    "meetingId": "87654321-4321-4321-1234-111122223333",
    "attendeeId": "87654321-4321-4321-1234-111122223333",
    "externalUserId": "87654321-4321-4321-1234-111122223333",
    "externalMeetingId": "87654321-4321-4321-1234-111122223333",
    "mediaRegion": "us-east-1"
  }
}
```

## Amazon Chime SDK attendee joins a meeting


The Amazon Chime SDK sends this event when an existing attendee joins an Amazon Chime SDK meeting using the specified network transport.

**Example Event data**  
The following example shows the data for this event.  

```
{
  "version": "0",
  "source": "aws.chime",
  "account": "111122223333", 
  "region": "us-east-1",
  "detail-type": "Chime Meeting State Change",
  "time": "yyyy-mm-ddThh:mm:ssZ",
  "resources": []
  "detail": {
    "version": "0",
    "eventType": "chime:AttendeeJoined",
    "timestamp": 12344566754,
    "meetingId": "87654321-4321-4321-1234-111122223333",
    "attendeeId": "87654321-4321-4321-1234-111122223333",
    "externalUserId": "87654321-4321-4321-1234-111122223333",    
    "networkType": "Voip",
    "externalMeetingId": "87654321-4321-4321-1234-111122223333",
    "mediaRegion": "us-east-1"
  }
}
```

## Amazon Chime SDK attendee leaves a meeting


The Amazon Chime SDK sends this event when an existing attendee leaves an Amazon Chime SDK meeting using the specified network transport.

**Note**  
The service never sends `chime:AttendeeLeft` AND `chime:AttendeeDropped` events for the same "leave" action. Dropping and leaving are different actions, and the system sends the event that corresponds to each action.  
For example, say an attendee with a poor connection joins a meeting at 11 AM. You can expect the following actions:  

```
11:00 API – CreateAttendee, CreateMeetingWithAttendee, or BatchCreateAttendee
11:00   Event – chime:AttendeeAdded
11:01 Action – user joins meeting
11:01   Event – chime:AttendeeJoined
11:02 Action – user's connection drops
11:02   Event – chime:AttendeeDropped
11:03 Action – user's connection restored
11:03   Event – chime:AttendeeJoined
11:30 Action – user leaves meeting
11:30   Event – chime:AttendeeLeft
```

**Example Event data**  
The following example shows the data for this event.  

```
{
  "version": "0",
  "source": "aws.chime",
  "account": "111122223333",  
  "region": "us-east-1",
  "detail-type": "Chime Meeting State Change",
  "time": "yyyy-mm-ddThh:mm:ssZ",
  "resources": []
  "detail": {
    "version": "0",
    "eventType": "chime:AttendeeLeft",
    "timestamp": 12344566754,
    "meetingId": "87654321-4321-4321-1234-111122223333",
    "attendeeId": "87654321-4321-4321-1234-111122223333",
    "externalUserId": "87654321-4321-4321-1234-111122223333",
    "networkType": "Voip",
    "externalMeetingId": "87654321-4321-4321-1234-111122223333",
    "mediaRegion": "us-east-1"
  }
}
```

## Amazon Chime SDK attendee is dropped from a meeting


The Amazon Chime SDK sends this event when a current attendee is dropped from an Amazon Chime SDK meeting, usually because of a poor connection. When the service doesn't receive packets for 10-15 seconds, it considers the cient dropped and issues the event.

The service usually triggers drop actions, but clients can also trigger them. For example, say a user switches their laptop from Wi-Fi to Ethernet. That constitutes a network adapter change, and the connection is reset. In turn, that resets the websocket and triggers a combined drop-join action.

**Note**  
The service never sends `chime:AttendeeLeft` AND `chime:AttendeeDropped` events for the same "leave" action. Dropping and leaving are different actions, and the system sends the event that corresponds to each action.  
For example, say an attendee with a poor connection joins a meeting at 11 AM. You can expect the following actions:  

```
11:00 API – CreateAttendee, CreateMeetingWithAttendee, or BatchCreateAttendee
11:00   Event – chime:AttendeeAdded
11:01 Action – user joins meeting
11:01   Event – chime:AttendeeJoined
11:02 Action – user's connection drops
11:02   Event – chime:AttendeeDropped
11:03 Action – user's connection restored
11:03   Event – chime:AttendeeJoined
11:30 Action – user leaves meeting
11:30   Event – chime:AttendeeLeft
```

**Example Event data**  
The following example shows the data for this event.  

```
{
  "version": "0",
  "source": "aws.chime",
  "account": "111122223333",  
  "region": "us-east-1",
  "detail-type": "Chime Meeting State Change",
  "time": "yyyy-mm-ddThh:mm:ssZ",
  "resources": []
  "detail": {
    "version": "0",
    "eventType": "chime:AttendeeDropped",
    "timestamp": 12344566754,
    "meetingId": "87654321-4321-4321-1234-111122223333",
    "attendeeId": "87654321-4321-4321-1234-111122223333",
    "externalUserId": "87654321-4321-4321-1234-111122223333",  
    "networkType": "Voip",
    "externalMeetingId": "87654321-4321-4321-1234-111122223333",
    "mediaRegion": "us-east-1"
  }
}
```

## Amazon Chime SDK attendee starts streaming video


The Amazon Chime SDK sends this event when an existing attendee starts streaming video.

**Example Event data**  
The following example shows the data for this event.  

```
{
  "version": "0",
  "source": "aws.chime",
  "account": "111122223333", 
  "region": "us-east-1",
  "detail-type": "Chime Meeting State Change",
  "time": "yyyy-mm-ddThh:mm:ssZ",
  "resources": []
  "detail": {
    "version": "0",
    "eventType": "chime:AttendeeVideoStarted",
    "timestamp": 12344566754,
    "meetingId": "87654321-4321-4321-1234-111122223333",
    "attendeeId": "87654321-4321-4321-1234-111122223333",
    "externalUserId": "87654321-4321-4321-1234-111122223333",
    "externalMeetingId": "87654321-4321-4321-1234-111122223333",
    "mediaRegion": "us-east-1"
  }
}
```

## Amazon Chime SDK attendee stops streaming video


The Amazon Chime SDK sends this event when an existing attendee stops streaming video.

**Example Event data**  
The following example shows the data for this event.  

```
{
  "version": "0",
  "source": "aws.chime",
  "account": "111122223333", 
  "region": "us-east-1",
  "detail-type": "Chime Meeting State Change",
  "time": "yyyy-mm-ddThh:mm:ssZ",
  "resources": []
  "detail": {
    "version": "0",
    "eventType": "chime:AttendeeVideoStopped",
    "timestamp": 12344566754,
    "meetingId": "87654321-4321-4321-1234-111122223333",
    "attendeeId": "87654321-4321-4321-1234-111122223333",
    "externalUserId": "87654321-4321-4321-1234-111122223333",
    "externalMeetingId": "87654321-4321-4321-1234-111122223333",
    "mediaRegion": "us-east-1"
  }
}
```

## Amazon Chime SDK attendee starts sharing screen


The Amazon Chime SDK sends this event when an existing attendee starts sharing their screen.

**Example Event data**  
The following example shows the data for this event.  

```
{
  "version": "0",
  "source": "aws.chime",
  "account": "111122223333",  
  "region": "us-east-1",
  "detail-type": "Chime Meeting State Change",
  "time": "yyyy-mm-ddThh:mm:ssZ",
  "resources": []
  "detail": {
    "version": "0",
    "eventType": "chime:AttendeeContentVideoStarted",
    "timestamp": 12344566754,
    "meetingId": "87654321-4321-4321-1234-111122223333",
    "attendeeId": "87654321-4321-4321-1234-111122223333",
    "externalUserId": "87654321-4321-4321-1234-111122223333",
    "externalMeetingId": "87654321-4321-4321-1234-111122223333",
    "mediaRegion": "us-east-1"
  }
}
```

## Amazon Chime SDK attendee stops sharing screen


The Amazon Chime SDK sends this event when an existing attendee stops sharing their screen.

**Example Event data**  
The following example shows the data for this event.  

```
{
  "version": "0",
  "source": "aws.chime",
  "account": "111122223333",  
  "region": "us-east-1",
  "detail-type": "Chime Meeting State Change",
  "time": "yyyy-mm-ddThh:mm:ssZ",
  "resources": []
  "detail": {
    "version": "0",
    "eventType": "chime:AttendeeContentVideoStopped",
    "timestamp": 12344566754,
    "meetingId": "87654321-4321-4321-1234-111122223333",
    "attendeeId": "87654321-4321-4321-1234-111122223333",
    "externalUserId": "87654321-4321-4321-1234-111122223333",
    "externalMeetingId": "87654321-4321-4321-1234-111122223333",
    "mediaRegion": "us-east-1"
  }
}
```

## Amazon Chime SDK attendee capabilities updated


The Amazon Chime SDK sends this event when an existing attendee's capabilities are updated.

**Example Event data**  

```
{
  "version": "0",
  "source": "aws.chime",
  "account": "111122223333",
  "id": "12345678-1234-1234-1234-111122223333",
  "region": "us-east-1",
  "detail-type": "Chime Meeting State Change",
  "time": "yyyy-mm-ddThh:mm:ssZ",
  "resources": [],
  "detail": {
    "version": "0",
    "eventType": "chime:AttendeeCapabilitiesUpdated",
    "success": "1", // value can be 1 or 0. 1 means success, 0 means failure
    "timestamp": 12344566754,
    "meetingId": "87654321-4321-4321-1234-111122223333",
    "externalMeetingId": "mymeeting",
    "attendeeId": "attendeeId",
    "externalUserId": "externalUserId"
    "mediaRegion": "us-east-1"
    "attendeeCapabilities": {
    "audio": "SendReceive",
    "video": "SendReceive",
    "content": "SendReceive"
   }
  }
}
```

## Amazon Chime SDK attendee content joins a meeting


The Amazon Chime SDK sends this event when a content share joins an Amazon Chime SDK meeting using the specified network transport.

**Example Event data**  
The following example shows the data for this event.  

```
{
  "version": "0",
  "source": "aws.chime",
  "account": "111122223333",  
  "region": "us-east-1",
  "detail-type": "Chime Meeting State Change",
  "time": "yyyy-mm-ddThh:mm:ssZ",
  "resources": []
  "detail": {
    "version": "0",
    "eventType": "chime:AttendeeContentJoined",
    "timestamp": 12344566754,
    "meetingId": "87654321-4321-4321-1234-111122223333",
    "attendeeId": "87654321-4321-4321-1234-111122223333",
    "externalUserId": "87654321-4321-4321-1234-111122223333",
    "networkType": "Voip",
    "externalMeetingId": "87654321-4321-4321-1234-111122223333",
    "mediaRegion": "us-east-1"
  }
}
```

## Amazon Chime SDK attendee content leaves a meeting


The Amazon Chime SDK sends this event when a content share leaves an Amazon Chime SDK meeting using the specified network transport.

**Example Event data**  
The following example shows the data for this event.  

```
{
  "version": "0",
  "source": "aws.chime",
  "account": "111122223333",  
  "region": "us-east-1",
  "detail-type": "Chime Meeting State Change",
  "time": "yyyy-mm-ddThh:mm:ssZ",
  "resources": []
  "detail": {
    "version": "0",
    "eventType": "chime:AttendeeContentLeft",
    "timestamp": 12344566754,
    "meetingId": "87654321-4321-4321-1234-111122223333",
    "attendeeId": "87654321-4321-4321-1234-111122223333",
    "externalUserId": "87654321-4321-4321-1234-111122223333",
    "networkType": "Voip",
    "externalMeetingId": "87654321-4321-4321-1234-111122223333",
    "mediaRegion": "us-east-1"
  }
}
```

## Amazon Chime SDK attendee content drops from a meeting


The Amazon Chime SDK sends this event when a content share drops from an Amazon Chime SDK meeting, typically because of low bandwidth.

**Example Event data**  
The following example shows the data for this event.  

```
{
  "version": "0",
  "source": "aws.chime",
  "account": "111122223333",  
  "region": "us-east-1",
  "detail-type": "Chime Meeting State Change",
  "time": "yyyy-mm-ddThh:mm:ssZ",
  "resources": []
  "detail": {
    "version": "0",
    "eventType": "chime:AttendeeContentDropped",
    "timestamp": 12344566754,
    "meetingId": "87654321-4321-4321-1234-111122223333",
    "attendeeId": "87654321-4321-4321-1234-111122223333",
    "externalUserId": "87654321-4321-4321-1234-111122223333",
    "networkType": "Voip",
    "externalMeetingId": "87654321-4321-4321-1234-111122223333",
    "mediaRegion": "us-east-1"
  }
}
```

## Amazon Chime SDK attendee content starts streaming video


The Amazon Chime SDK sends this event when a content share starts streaming video.

**Example Event data**  
The following example shows the data for this event.  

```
{
  "version": "0",
  "source": "aws.chime",
  "account": "111122223333",  
  "region": "us-east-1",
  "detail-type": "Chime Meeting State Change",
  "time": "yyyy-mm-ddThh:mm:ssZ",
  "resources": []
  "detail": {
    "version": "0",
    "eventType": "chime:AttendeeContentVideoStarted",
    "timestamp": 12344566754,
    "meetingId": "87654321-4321-4321-1234-111122223333",
    "attendeeId": "87654321-4321-4321-1234-111122223333",
    "externalUserId": "87654321-4321-4321-1234-111122223333",
    "externalMeetingId": "87654321-4321-4321-1234-111122223333",
    "mediaRegion": "us-east-1"
  }
}
```

## Amazon Chime SDK attendee content stops streaming video


The Amazon Chime SDK sends this event when a content share stops streaming video.

**Example Event data**  
The following example shows the data for this event.  

```
{
  "version": "0",
  "source": "aws.chime",
  "account": "111122223333", 
  "region": "us-east-1",
  "detail-type": "Chime Meeting State Change",
  "time": "yyyy-mm-ddThh:mm:ssZ",
  "resources": []
  "detail": {
    "version": "0",
    "eventType": "chime:AttendeeContentVideoStopped",
    "timestamp": 12344566754,
    "meetingId": "87654321-4321-4321-1234-111122223333",
    "attendeeId": "87654321-4321-4321-1234-111122223333",
    "externalUserId": "87654321-4321-4321-1234-111122223333",
    "externalMeetingId": "87654321-4321-4321-1234-111122223333",
    "mediaRegion": "us-east-1"
  }
}
```