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resource_circonus_metric_cluster.go
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resource_circonus_metric_cluster.go
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package circonus
import (
"bytes"
"fmt"
"strings"
"github.com/circonus-labs/circonus-gometrics/api"
"github.com/hashicorp/errwrap"
"github.com/hashicorp/terraform/helper/hashcode"
"github.com/hashicorp/terraform/helper/schema"
)
const (
// circonus_metric_cluster.* resource attribute names
metricClusterDescriptionAttr = "description"
metricClusterNameAttr = "name"
metricClusterQueryAttr = "query"
metricClusterTagsAttr = "tags"
// circonus_metric_cluster.* out parameters
metricClusterIDAttr = "id"
// circonus_metric_cluster.query.* resource attribute names
metricClusterDefinitionAttr = "definition"
metricClusterTypeAttr = "type"
)
var metricClusterDescriptions = attrDescrs{
metricClusterDescriptionAttr: "A description of the metric cluster",
metricClusterIDAttr: "The ID of this metric cluster",
metricClusterNameAttr: "The name of the metric cluster",
metricClusterQueryAttr: "A metric cluster query definition",
metricClusterTagsAttr: "A list of tags assigned to the metric cluster",
}
var metricClusterQueryDescriptions = attrDescrs{
metricClusterDefinitionAttr: "A query to select a collection of metric streams",
metricClusterTypeAttr: "The operation to perform on the matching metric streams",
}
func resourceMetricCluster() *schema.Resource {
return &schema.Resource{
Create: metricClusterCreate,
Read: metricClusterRead,
Update: metricClusterUpdate,
Delete: metricClusterDelete,
Exists: metricClusterExists,
Importer: &schema.ResourceImporter{
State: schema.ImportStatePassthrough,
},
Schema: convertToHelperSchema(metricClusterDescriptions, map[schemaAttr]*schema.Schema{
metricClusterDescriptionAttr: &schema.Schema{
Type: schema.TypeString,
Optional: true,
Computed: true,
StateFunc: suppressWhitespace,
},
metricClusterNameAttr: &schema.Schema{
Type: schema.TypeString,
Required: true,
},
metricClusterQueryAttr: &schema.Schema{
Type: schema.TypeSet,
Optional: true,
MinItems: 1,
Elem: &schema.Resource{
Schema: convertToHelperSchema(metricClusterQueryDescriptions, map[schemaAttr]*schema.Schema{
metricClusterDefinitionAttr: &schema.Schema{
Type: schema.TypeString,
Required: true,
ValidateFunc: validateRegexp(metricClusterDefinitionAttr, `.+`),
},
metricClusterTypeAttr: &schema.Schema{
Type: schema.TypeString,
Required: true,
ValidateFunc: validateStringIn(metricClusterTypeAttr, supportedMetricClusterTypes),
},
}),
},
},
metricClusterTagsAttr: tagMakeConfigSchema(metricClusterTagsAttr),
// Out parameters
metricClusterIDAttr: &schema.Schema{
Computed: true,
Type: schema.TypeString,
},
}),
}
}
func metricClusterCreate(d *schema.ResourceData, meta interface{}) error {
ctxt := meta.(*providerContext)
mc := newMetricCluster()
if err := mc.ParseConfig(d); err != nil {
return errwrap.Wrapf("error parsing metric cluster schema during create: {{err}}", err)
}
if err := mc.Create(ctxt); err != nil {
return errwrap.Wrapf("error creating metric cluster: {{err}}", err)
}
d.SetId(mc.CID)
return metricClusterRead(d, meta)
}
func metricClusterExists(d *schema.ResourceData, meta interface{}) (bool, error) {
ctxt := meta.(*providerContext)
cid := d.Id()
mc, err := ctxt.client.FetchMetricCluster(api.CIDType(&cid), "")
if err != nil {
if strings.Contains(err.Error(), defaultCirconus404ErrorString) {
return false, nil
}
return false, err
}
if mc.CID == "" {
return false, nil
}
return true, nil
}
// metricClusterRead pulls data out of the MetricCluster object and stores it
// into the appropriate place in the statefile.
func metricClusterRead(d *schema.ResourceData, meta interface{}) error {
ctxt := meta.(*providerContext)
cid := d.Id()
mc, err := loadMetricCluster(ctxt, api.CIDType(&cid))
if err != nil {
return err
}
d.SetId(mc.CID)
queries := schema.NewSet(metricClusterQueryChecksum, nil)
for _, query := range mc.Queries {
queryAttrs := map[string]interface{}{
string(metricClusterDefinitionAttr): query.Query,
string(metricClusterTypeAttr): query.Type,
}
queries.Add(queryAttrs)
}
d.Set(metricClusterDescriptionAttr, mc.Description)
d.Set(metricClusterNameAttr, mc.Name)
if err := d.Set(metricClusterTagsAttr, tagsToState(apiToTags(mc.Tags))); err != nil {
return errwrap.Wrapf(fmt.Sprintf("Unable to store metric cluster %q attribute: {{err}}", metricClusterTagsAttr), err)
}
d.Set(metricClusterIDAttr, mc.CID)
return nil
}
func metricClusterUpdate(d *schema.ResourceData, meta interface{}) error {
ctxt := meta.(*providerContext)
mc := newMetricCluster()
if err := mc.ParseConfig(d); err != nil {
return err
}
mc.CID = d.Id()
if err := mc.Update(ctxt); err != nil {
return errwrap.Wrapf(fmt.Sprintf("unable to update metric cluster %q: {{err}}", d.Id()), err)
}
return metricClusterRead(d, meta)
}
func metricClusterDelete(d *schema.ResourceData, meta interface{}) error {
ctxt := meta.(*providerContext)
cid := d.Id()
if _, err := ctxt.client.DeleteMetricClusterByCID(api.CIDType(&cid)); err != nil {
return errwrap.Wrapf(fmt.Sprintf("unable to delete metric cluster %q: {{err}}", d.Id()), err)
}
d.SetId("")
return nil
}
func metricClusterQueryChecksum(v interface{}) int {
m := v.(map[string]interface{})
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[metricClusterDefinitionAttr]; found {
fmt.Fprint(b, v.(string))
}
if v, found := m[metricClusterTypeAttr]; found {
fmt.Fprint(b, v.(string))
}
s := b.String()
return hashcode.String(s)
}
// ParseConfig reads Terraform config data and stores the information into a
// Circonus MetricCluster object.
func (mc *circonusMetricCluster) ParseConfig(d *schema.ResourceData) error {
if v, found := d.GetOk(metricClusterDescriptionAttr); found {
mc.Description = v.(string)
}
if v, found := d.GetOk(metricClusterNameAttr); found {
mc.Name = v.(string)
}
if queryListRaw, found := d.GetOk(metricClusterQueryAttr); found {
queryList := queryListRaw.(*schema.Set).List()
mc.Queries = make([]api.MetricQuery, 0, len(queryList))
for _, queryRaw := range queryList {
queryAttrs := newInterfaceMap(queryRaw)
var query string
if v, found := queryAttrs[metricClusterDefinitionAttr]; found {
query = v.(string)
}
var queryType string
if v, found := queryAttrs[metricClusterTypeAttr]; found {
queryType = v.(string)
}
mc.Queries = append(mc.Queries, api.MetricQuery{
Query: query,
Type: queryType,
})
}
}
if v, found := d.GetOk(metricClusterTagsAttr); found {
mc.Tags = derefStringList(flattenSet(v.(*schema.Set)))
}
if err := mc.Validate(); err != nil {
return err
}
return nil
}