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vsphere-influxdb-go/vendor/github.com/influxdata/influxdb/monitor/diagnostics/diagnostics.go
2017-10-25 20:52:40 +00:00

65 lines
2.0 KiB
Go

// Package diagnostics provides the diagnostics type so that
// other packages can provide diagnostics without depending on the monitor package.
package diagnostics // import "github.com/influxdata/influxdb/monitor/diagnostics"
import "sort"
// Client is the interface modules implement if they register diagnostics with monitor.
type Client interface {
Diagnostics() (*Diagnostics, error)
}
// The ClientFunc type is an adapter to allow the use of
// ordinary functions as Diagnostics clients.
type ClientFunc func() (*Diagnostics, error)
// Diagnostics calls f().
func (f ClientFunc) Diagnostics() (*Diagnostics, error) {
return f()
}
// Diagnostics represents a table of diagnostic information. The first value
// is the name of the columns, the second is a slice of interface slices containing
// the values for each column, by row. This information is never written to an InfluxDB
// system and is display-only. An example showing, say, connections follows:
//
// source_ip source_port dest_ip dest_port
// 182.1.0.2 2890 127.0.0.1 38901
// 174.33.1.2 2924 127.0.0.1 38902
type Diagnostics struct {
Columns []string
Rows [][]interface{}
}
// NewDiagnostic initialises a new Diagnostics with the specified columns.
func NewDiagnostics(columns []string) *Diagnostics {
return &Diagnostics{
Columns: columns,
Rows: make([][]interface{}, 0),
}
}
// AddRow appends the provided row to the Diagnostics' rows.
func (d *Diagnostics) AddRow(r []interface{}) {
d.Rows = append(d.Rows, r)
}
// RowFromMap returns a new one-row Diagnostics from a map.
func RowFromMap(m map[string]interface{}) *Diagnostics {
// Display columns in deterministic order.
sortedKeys := make([]string, 0, len(m))
for k := range m {
sortedKeys = append(sortedKeys, k)
}
sort.Strings(sortedKeys)
d := NewDiagnostics(sortedKeys)
row := make([]interface{}, len(sortedKeys))
for i, k := range sortedKeys {
row[i] = m[k]
}
d.AddRow(row)
return d
}