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metric.go
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metric.go
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package circonus
// The circonusMetric type is the backing store of the `circonus_metric` resource.
import (
"bytes"
"fmt"
"github.com/circonus-labs/circonus-gometrics/api"
"github.com/hashicorp/errwrap"
uuid "github.com/hashicorp/go-uuid"
"github.com/hashicorp/terraform/helper/hashcode"
"github.com/hashicorp/terraform/helper/schema"
)
type circonusMetric struct {
ID metricID
api.CheckBundleMetric
}
func newMetric() circonusMetric {
return circonusMetric{}
}
func (m *circonusMetric) Create(d *schema.ResourceData) error {
return m.SaveState(d)
}
func (m *circonusMetric) ParseConfig(id string, d *schema.ResourceData) error {
m.ID = metricID(id)
if v, found := d.GetOk(metricNameAttr); found {
m.Name = v.(string)
}
if v, found := d.GetOk(metricActiveAttr); found {
m.Status = metricActiveToAPIStatus(v.(bool))
}
if v, found := d.GetOk(metricTagsAttr); found {
m.Tags = derefStringList(flattenSet(v.(*schema.Set)))
}
if v, found := d.GetOk(metricTypeAttr); found {
m.Type = v.(string)
}
if v, found := d.GetOk(metricUnitAttr); found {
s := v.(string)
m.Units = &s
}
if m.Units != nil && *m.Units == "" {
m.Units = nil
}
return nil
}
func (m *circonusMetric) ParseConfigMap(id string, attrMap map[string]interface{}) error {
m.ID = metricID(id)
if v, found := attrMap[metricNameAttr]; found {
m.Name = v.(string)
}
if v, found := attrMap[metricActiveAttr]; found {
m.Status = metricActiveToAPIStatus(v.(bool))
}
if v, found := attrMap[metricTagsAttr]; found {
m.Tags = derefStringList(flattenSet(v.(*schema.Set)))
}
if v, found := attrMap[metricTypeAttr]; found {
m.Type = v.(string)
}
if v, found := attrMap[metricUnitAttr]; found {
s := v.(string)
m.Units = &s
}
if m.Units != nil && *m.Units == "" {
m.Units = nil
}
return nil
}
func (m *circonusMetric) SaveState(d *schema.ResourceData) error {
d.SetId(string(m.ID))
d.Set(metricActiveAttr, metricAPIStatusToBool(m.Status))
d.Set(metricNameAttr, m.Name)
d.Set(metricTagsAttr, tagsToState(apiToTags(m.Tags)))
d.Set(metricTypeAttr, m.Type)
d.Set(metricUnitAttr, indirect(m.Units))
return nil
}
func (m *circonusMetric) Update(d *schema.ResourceData) error {
// NOTE: there are no "updates" to be made against an API server, so we just
// pass through a call to SaveState. Keep this method around for API
// symmetry.
return m.SaveState(d)
}
func metricAPIStatusToBool(s string) bool {
switch s {
case metricStatusActive:
return true
case metricStatusAvailable:
return false
default:
// log.Printf("PROVIDER BUG: metric status %q unsupported", s)
return false
}
}
func metricActiveToAPIStatus(active bool) string {
if active {
return metricStatusActive
}
return metricStatusAvailable
}
func newMetricID() (string, error) {
id, err := uuid.GenerateUUID()
if err != nil {
return "", errwrap.Wrapf("metric ID creation failed: {{err}}", err)
}
return id, nil
}
func metricChecksum(m interfaceMap) int {
b := &bytes.Buffer{}
b.Grow(defaultHashBufSize)
// Order writes to the buffer using lexically sorted list for easy visual
// reconciliation with other lists.
if v, found := m[metricActiveAttr]; found {
fmt.Fprintf(b, "%t", v.(bool))
}
if v, found := m[metricNameAttr]; found {
fmt.Fprint(b, v.(string))
}
if v, found := m[metricTagsAttr]; found {
tags := derefStringList(flattenSet(v.(*schema.Set)))
for _, tag := range tags {
fmt.Fprint(b, tag)
}
}
if v, found := m[metricTypeAttr]; found {
fmt.Fprint(b, v.(string))
}
if v, found := m[metricUnitAttr]; found {
if v != nil {
var s string
switch v.(type) {
case string:
s = v.(string)
case *string:
s = *v.(*string)
}
if s != "" {
fmt.Fprint(b, s)
}
}
}
s := b.String()
return hashcode.String(s)
}