Introduction:
This documents describes the design for capturing Device and User location. This design requires following changes
- Get Device Profile API - To return back the IP resolved location for the device.
- Device Register API Enhancements - API to save User confirmed location to device_profile Cassandra table as derived location.
- Telemetry Location Updater Samza Job Changes - To stamp derived location in the telemetry.
Get Device Location API:
This API returns back IP resolved location details from MaxMind DB.
Request Details:
End point: GET /v3/device/location/<deviceId>
IP details is sent as X-FORWARDED-FOR in the header.
Response Details:
{
"id": "analytics.device-location",
"ver": "1.0",
"ts": "2019-07-30T18:54:10.627+00:00",
"params": {
"resmsgid": "e045d484-eedb-4fa9-a9d8-9c3e489e664f",
"status": "successful",
"client_key": null
},
"responseCode": "OK",
"result": {
"user_declared_location": {
"state": "Karnataka",
"district": "Bengaluru"
},
"device_profile": {
}
}
}
Device Register API Enhancements:
- For signed in users - Saves location details as derived location in device_profile cassandra table.
- For anonymous users - Resolves the IP address from the x-forwarded-for header and writes to cassandra.
Request Details:
End point: POST /v3/device/register/<deviceId>
IP details is sent as X-FORWARDED-FOR in the header.
Object:
{
"id": "dev.sunbird.portal",
"ver": "1.15.0",
"ts": "2019-04-23T19:23:02+05:30",
"params": {
"msgid": "4f92a44f-127f-0c82-b2ad-715faa558a8d"
},
"request": {
"uaspec": {
"agent": "Chrome",
"ver": "72.0.3626.121",
"system": "mac-os-x-14",
"platform": "Mac",
"raw": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36"
},
"channel": "b00bc992ef25f1a9a8d63291e20efc8d",
"fcmToken": "asda",
"producer": "app12",
"dspec": {"id": "oppo"},
"ext": {
"userid": "user1"
},
"user_declared_location": {
"state": "Karnataka",
"district": "Bengaluru"
}
}
}
Response Details:
{
"id": "analytics.device-register",
"ver": "1.0",
"ts": "2019-07-30T18:54:10.627+00:00",
"params": {
"resmsgid": "e045d484-eedb-4fa9-a9d8-9c3e489e664f",
"status": "successful",
"client_key": null
},
"responseCode": "OK",
"result": {
"message": "Device registered successfully",
"actions": [
{
"type": "experiment",
"data": {
"experimentName": "first-exp",
"key": "/page1/4",
"experimentId": "exp1",
"title": "experiment"
}
}
]
}
}
Cassandra schema:
CREATE TABLE IF NOT EXISTS {{ cassandra.keyspace_prefix }}device_db.device_profile (
device_id text,
first_access timestamp,
last_access timestamp,
total_ts double,
total_launches bigint,
avg_ts double,
device_spec Map<text,text>,
updated_date timestamp,
state text,
state_code text,
country text,
country_code text,
state_custom text,
state_code_custom text,
district_custom text,
city text,
uaspec Map<text,text>,
fcm_token text,
producer_id text,
user_declared_state text,
user_declared_district text,
PRIMARY KEY (device_id)
);
Queries:
- Derived and device location details needs to be stored separately? and derived location should have only state and district or all other fields?
- Current Device Register API writes device location to cassandra via kafka and which of the above API should have this logic?
- User derived location has only state & district, telemetry stamping requires other details - state code, state custom details, city details, etc
- Can derived location be the new columns in same device_profile cassandra table.?
- Will derived location details in telemetry stamped as new fields or same current device location fields?