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# Usage Client [](https://godoc.org/github.com/influxdb/usage-client/v1)
The `usage-client` package is used to speak with the Usage API in a simple and straight forward way. No muss, no fuss!
## V1
### Installation
```go
$ go get github.com/influxdb/usage-client/v1
```
### An Important Developers Note
When testing and developing your applications to work with the Usage API, please make sure to change the `client.URL` to be something other than it's default, which is production. Might I recommend the following:
```go
client.URL = "https://usage.staging.influxdata.com"
```
More info can be found in the documentation [here](https://godoc.org/github.com/influxdb/usage-client/v1#pkg-variables).
__NOTE__: Applications should make this URL configurable.
## Registering a Customer
Customer's need to register with Enterprise and will receive a token in return. This token should be saved and sent along on all subsequent requests, more on this in a minute.
Before sending a customer to Enterprise to register you will need to generate a URL to give to that customer.
```go
c := client.New("")
r := client.Registration{
ClusterID: "clus1",
Product: "chronograf",
RedirectURL: "http://example.com",
}
u, err := c.RegistrationURL(r)
```
If a `RedirectURL` was specified then the customer will be redirected to that URL after successfully completing their registration. There will also be a `token` query parameter attached to the URL, please retrieve and store this token for future use!
__NOTE__: If there is no token stored locally (it is up to each app to store this token), when the application starts up they user should be prompted to register with Enterprise.
## Registering a Server
When an app wakes up (influxdb, chronograf, etc…) it attempt to register itself with Enterprise:
```go
c := client.New("token-goes-here")
s := client.Server{
ClusterID: "clus1",
Host: "example.com",
Product: "influxdb",
Version: "1.0",
ServerID: "serv1",
}
res, err := c.Save(s)
```
This should happen every time the application starts.
## Posting Product Stats:
Ideally when posting product stats data to Enterprise you will pass the "token". If no token is set then the data will __NOT__ be associated with any organization.
```go
c := client.New("token-goes-here")
st := client.Stats{
ClusterID: "clus1",
ServerID: "serv1",
Product: "influxdb",
Data: []client.StatsData{
client.StatsData{
Name: "engine",
Tags: client.Tags{
"path": "/home/philip/.influxdb/data/_internal/monitor/1",
"version": "bz1",
},
Values: client.Values{
"blks_write": 39,
"blks_write_bytes": 2421,
"blks_write_bytes_c": 2202,
"points_write": 39,
"points_write_dedupe": 39,
},
},
},
}
res, err := c.Save(st)
```
## Posting Usage Stats:
Usage stats are anonymous stats sent to Enterprise every 12 hours.
```go
c := client.New("token-goes-here")
u := client.Usage{
Product: "influxdb",
Data: []client.UsageData{
{
Tags: client.Tags{
"version": "0.9.5",
"arch": "amd64",
"os": "linux",
},
Values: client.Values{
"cluster_id": "23423",
"server_id": "1",
"num_databases": 3,
"num_measurements": 2342,
"num_series": 87232,
},
},
},
}
res, err := c.Save(u)
```
## API Errors
As you probably know [Go doesn't return error codes for non-2xx HTTP requests](http://metabates.com/2015/10/15/handling-http-request-errors-in-go/), but thankfully the Enterprise Client does!
The API will return one of two errors back to you if there are any problems:
* `SimpleError` - This type of error is common for status codes such as `401`, `404`, and `500`. [https://godoc.org/github.com/influxdb/usage-client/v1#SimpleError](https://godoc.org/github.com/influxdb/usage-client/v1#SimpleError)
* `ValidationErrors` - Type type of error is common for status codes such as `422` and will return specific errors related to the validity of the payload sent to the API. [https://godoc.org/github.com/influxdb/usage-client/v1#ValidationErrors](https://godoc.org/github.com/influxdb/usage-client/v1#ValidationErrors)
It is recommended to check for these errors and handle them appropriately.
|
