Sources and Destinations

A PowerAPI Formula uses Sources and Destinations in order to retrieve metrics and store estimations.

For each Source/Destination the parameters to specify are different. For each one of them, its parameters are specified in following sections.

Summary

Name	Source	Destination	CLI input/ouput parameter value	JSON type tag parameter value
MongoDB	Yes	Yes	mongodb	mongodb
InfluxDB2	No	Yes	influxdb2	influxdb2
CSV	Yes	Yes	csv	csv
Socket	Yes	No	socket	socket
File Database	Yes	Yes	filedb	filedb
Prometheus	No	Yes	prometheus	prometheus

MongoDB

If you want to use a Mongo Database in your Formula, you have to specify mongodb as the type of a puller (Source) or a pusher (Destination).

Parameters

The list of accepted parameters are:

Parameter	Type	CLI shortcut	Default Value	Mandatory	Description
uri	string	u (U for HWPCSensor)	N/A	Yes	The IP address of your MongoDB instance
db (database for HWPCSensor)	string	d (D for HWPCSensor)	N/A	Yes	The name of your database
collection	string	c (C for HWPCSensor)	N/A	Yes	The name of the collection inside db
name	string	n	"puller_mongodb" (Source), pusher_mongodb (Destination)	No	The related puller/pusher name. This parameter is not used by HWPCSensor
model	string	m	"HWPCReport" (Source), PowerReport (Destination)	No	The Report type stored by the database

JSON File Excerpt

Below you find a configuration excerpt for this kind of Source/Destination.

{
  "type": "mongodb",
  "uri": "mongodb://127.0.0.1",
  "db": "test",
  "collection": "prep"
}

The default port for MongoDB is 27017

Influx DB 2

If you want to use InfluxDB 2 in your Formula as Destination, you have to specify influxedb2 as the type of a pusher.

Parameters

The list of accepted parameters are:

Parameter	Type	CLI shortcut	Default Value	Mandatory	Description
uri	string	u	N/A	Yes	The IP address of your Influxdb instance. It can contain the port number
db	string	d	N/A	Yes	The name of your bucket (database)
port	int	p	None	N/A	The port of communication. It is not mandatory if it is indicated in the uri
token	string	k	N/A	Yes	The token for accessing the database. The token owner must have write/read permissions on the bucket
org	string	g	N/A	Yes	The name of the organization associated to the bucket
tags	string	t	N/A	No	The report tags
name	string	n	"pusher_influxdb2"	No	The related pusher name
model	string	m	"PowerReport"	No	The Report type stored by the database

InfluxDB2 can only be used as a Destination.

JSON File Excerpt

Below you find an example of configuration excerpt for this kind of Destination.

{
  "model": "PowerReport",
  "type": "influxdb2",
  "uri": "http://127.0.0.1",
  "port": 8086,
  "db": "influxdb2",
  "org": "org_test",
  "token": "mytoken"
}

CSV

If you want to use a CSV file in your Formula as Source or Destination, you have to specify csv as the type of a puller or a pusher.

Parameters

The list of accepted parameters are:

Parameter	Type	CLI shortcut	Default Value	Mandatory	Description
files(Source)	string	f	Empty list	No	The list of input CSV files with the format file1,file2,file3...
directory (Destination, uri for HWPCSensor)	string	d (U for HWPCSensor)	Current directory	No	The directory where output CSV files will be written
name	string	n	"puller_csv" (Source), "pusher_csv" (Destination)	No	The related puller/pusher name. This parameter is not used by HWPCSensor
model	string	m	"HWPCReport" (Source), "PowerReport" (Destination)	No	The Report type stored in CSV files. This parameter is not used by HWPCSensor

JSON File Excerpt

Below you find an example of configuration excerpt for this kind of Source/Destination.

{
  "type": "csv",
  "directory": "/tmp/sensor_output/"
}

Socket

If you want to use a TCP socket in your Formula as Source, you have to specify socket as the type of a puller. This Source is made for stream mode active only.

Parameters

The list of accepted parameters are:

Parameter	Type	CLI shortcut	Default Value	Mandatory	Description
port	int	p	N/A	Yes	The port of communication
name	string	n	"puller_socket"	No	The related puller name
model	string	m	"HWPCReport"	No	The Report type managed by the socket

JSON File Excerpt

Below you find an example of configuration excerpt for this kind of Source.

{
  "type": "socket",
  "port": 8080
}

File Database

If you want to use a File Database as Source/Destination in your Formula your have to specify filedb as the type of a puller or a pusher. The File Database is made for stream mode only. It should contain only the last report when used as a Destination.

Parameters

The list of accepted parameters are:

Parameter	Type	CLI shortcut	Default Value	Mandatory	Description
filename	int	f	N/A	Yes	The name of the file
name	string	n	"pusher_filedb"	No	The related pusher name
model	string	m	"HWPCReport" (Source) "PowerReport" (Destination)	No	The Report type stored in the file

JSON File Excerpt

Below you find an example of configuration excerpt for this kind of Source/Destination.

{
  "type": "filedb",
  "filename": /tmp/database/input_file.json
}

Prometheus

If you want to use a Prometheus instance to expose reports to be scraped, you have to specify prometheus as the type of a pusher in your formula configuration file.

Parameters

The list of accepted parameters are:

Parameter	Type	CLI shortcut	Default Value	Mandatory	Description
uri	string	u	127.0.0.1	No	The IP address of your Prometheus instance
port	int	p	N/A	Yes	The port of communication
tags	string	t	N/A	No	The Report tags separated by ,
metric_name	string	M	N/A	Yes	The exposed metric name
metric_description	string	d	"energy consumption"	No	The exposed metric description
name	string	n	"pusher_prom"	No	The related pusher name
model	string	m	"PowerReport"	No	The Report type exposed by Prometheus

Prometheus can only be used as a Destination that monitors reports but they will be not stored by this service. The tags names are metadata keys of reports to be used as labels. If a report doesn't have a provide tag, it will be ignored by the Destination.

JSON File Excerpt

Below you find an example of configuration excerpt for this kind of Destination.

{
  "type": "prometheus",
  "uri": "127.0.0.1",
  "port": 8080,
  "metric_name": test
}