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The DeviceRegister Service writes the device profile details into a device-profile.log file.

Code Block

language	text
theme	RDark
title	device-profile.log

{
	"statecustomcodedevice_id": "29232455",
	"countryuaspec": "India",{
		"iso3166statecodeagent": "IN-KAChrome",
		"device_idsystem": "232455Linux",
	"uaspec": {
		"agentver": "Chrome68.0.3440.75",
		"raw": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.75 Safari/537.36",
		"system": "Linux",
		"ver": "68.0.3440.75"
	},
	"city": "Bengaluru",
	"countrycodecountry_code": "IN",
	"state": "Karnataka", 	"statecodecountry": "KAIndia",
	"api_last_updated_dateon": 1566383863167,
	"devicespecdevice_spec": {
		"os": "Android 6.0",
		"make": "Motorola XT1706"
	},
	"districtcustomdistrict_custom": "",
	"fcm_token": "asda",
	"firstaccessfirst_access": 1565328282703,
    "state_code_custom": "29",
	"statecustomname"state": "Karnataka",
	"state_code": "KA",
	"state_custom": "Karnataka",
	"producer_id": "dev.sunbird.portal"
}

Logstash will be configured to read from the log file and push the data into Kafka as an event.
A Secor process is run to take the device data from the Kafka topic and creates a backup.
DeviceProfileUpdater Samza job reads the Kafka event and:
a) If device_id exists in cache, updates the cache and the existing device profile Cassandra DB.
b) If device_id doesn't exist in cache, creates new entry in cache as well as Cassandra.

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