terraform/builtin/providers/aws/resource_aws_sns_topic.go

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package aws
import (
"bytes"
"encoding/json"
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"fmt"
"log"
"strings"
"time"
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"github.com/hashicorp/terraform/helper/resource"
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"github.com/hashicorp/terraform/helper/schema"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/service/sns"
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)
// Mutable attributes
var SNSAttributeMap = map[string]string{
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"arn": "TopicArn",
"display_name": "DisplayName",
"policy": "Policy",
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"delivery_policy": "DeliveryPolicy",
}
func resourceAwsSnsTopic() *schema.Resource {
return &schema.Resource{
Create: resourceAwsSnsTopicCreate,
Read: resourceAwsSnsTopicRead,
Update: resourceAwsSnsTopicUpdate,
Delete: resourceAwsSnsTopicDelete,
Schema: map[string]*schema.Schema{
"name": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"display_name": &schema.Schema{
Type: schema.TypeString,
Optional: true,
ForceNew: false,
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},
"policy": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Computed: true,
StateFunc: func(v interface{}) string {
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s, ok := v.(string)
if !ok || s == "" {
return ""
}
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jsonb := []byte(s)
buffer := new(bytes.Buffer)
if err := json.Compact(buffer, jsonb); err != nil {
log.Printf("[WARN] Error compacting JSON for Policy in SNS Topic")
return ""
}
value := normalizeJson(buffer.String())
log.Printf("[DEBUG] topic policy before save: %s", value)
return value
},
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},
"delivery_policy": &schema.Schema{
Type: schema.TypeString,
Optional: true,
ForceNew: false,
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},
"arn": &schema.Schema{
Type: schema.TypeString,
Computed: true,
},
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},
}
}
func resourceAwsSnsTopicCreate(d *schema.ResourceData, meta interface{}) error {
snsconn := meta.(*AWSClient).snsconn
name := d.Get("name").(string)
log.Printf("[DEBUG] SNS create topic: %s", name)
req := &sns.CreateTopicInput{
Name: aws.String(name),
}
output, err := snsconn.CreateTopic(req)
if err != nil {
return fmt.Errorf("Error creating SNS topic: %s", err)
}
d.SetId(*output.TopicArn)
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// Write the ARN to the 'arn' field for export
d.Set("arn", *output.TopicArn)
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return resourceAwsSnsTopicUpdate(d, meta)
}
func resourceAwsSnsTopicUpdate(d *schema.ResourceData, meta interface{}) error {
r := *resourceAwsSnsTopic()
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for k, _ := range r.Schema {
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if attrKey, ok := SNSAttributeMap[k]; ok {
if d.HasChange(k) {
log.Printf("[DEBUG] Updating %s", attrKey)
_, n := d.GetChange(k)
// Ignore an empty policy
if !(k == "policy" && n == "") {
// Make API call to update attributes
req := sns.SetTopicAttributesInput{
TopicArn: aws.String(d.Id()),
AttributeName: aws.String(attrKey),
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AttributeValue: aws.String(n.(string)),
}
// Retry the update in the event of an eventually consistent style of
// error, where say an IAM resource is successfully created but not
// actually available. See https://github.com/hashicorp/terraform/issues/3660
log.Printf("[DEBUG] Updating SNS Topic (%s) attributes request: %s", d.Id(), req)
stateConf := &resource.StateChangeConf{
Pending: []string{"retrying"},
Target: []string{"success"},
Refresh: resourceAwsSNSUpdateRefreshFunc(meta, req),
Timeout: 1 * time.Minute,
MinTimeout: 3 * time.Second,
}
_, err := stateConf.WaitForState()
if err != nil {
return err
}
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}
}
}
}
return resourceAwsSnsTopicRead(d, meta)
}
func resourceAwsSNSUpdateRefreshFunc(
meta interface{}, params sns.SetTopicAttributesInput) resource.StateRefreshFunc {
return func() (interface{}, string, error) {
snsconn := meta.(*AWSClient).snsconn
if _, err := snsconn.SetTopicAttributes(&params); err != nil {
log.Printf("[WARN] Erroring updating topic attributes: %s", err)
if awsErr, ok := err.(awserr.Error); ok {
// if the error contains the PrincipalNotFound message, we can retry
if strings.Contains(awsErr.Message(), "PrincipalNotFound") {
log.Printf("[DEBUG] Retrying AWS SNS Topic Update: %s", params)
return nil, "retrying", nil
}
}
return nil, "failed", err
}
return 42, "success", nil
}
}
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func resourceAwsSnsTopicRead(d *schema.ResourceData, meta interface{}) error {
snsconn := meta.(*AWSClient).snsconn
attributeOutput, err := snsconn.GetTopicAttributes(&sns.GetTopicAttributesInput{
TopicArn: aws.String(d.Id()),
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})
if err != nil {
if awsErr, ok := err.(awserr.Error); ok && awsErr.Code() == "NotFound" {
log.Printf("[WARN] SNS Topic (%s) not found, error code (404)", d.Id())
d.SetId("")
return nil
}
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return err
}
if attributeOutput.Attributes != nil && len(attributeOutput.Attributes) > 0 {
attrmap := attributeOutput.Attributes
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resource := *resourceAwsSnsTopic()
// iKey = internal struct key, oKey = AWS Attribute Map key
for iKey, oKey := range SNSAttributeMap {
log.Printf("[DEBUG] Reading %s => %s", iKey, oKey)
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if attrmap[oKey] != nil {
// Some of the fetched attributes are stateful properties such as
// the number of subscriptions, the owner, etc. skip those
if resource.Schema[iKey] != nil {
var value string
if iKey == "policy" {
value = normalizeJson(*attrmap[oKey])
} else {
value = *attrmap[oKey]
}
log.Printf("[DEBUG] Reading %s => %s -> %s", iKey, oKey, value)
d.Set(iKey, value)
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}
}
}
}
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// If we have no name set (import) then determine it from the ARN.
// This is a bit of a heuristic for now since AWS provides no other
// way to get it.
if _, ok := d.GetOk("name"); !ok {
arn := d.Get("arn").(string)
idx := strings.LastIndex(arn, ":")
if idx > -1 {
d.Set("name", arn[idx+1:])
}
}
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return nil
}
func resourceAwsSnsTopicDelete(d *schema.ResourceData, meta interface{}) error {
snsconn := meta.(*AWSClient).snsconn
log.Printf("[DEBUG] SNS Delete Topic: %s", d.Id())
_, err := snsconn.DeleteTopic(&sns.DeleteTopicInput{
TopicArn: aws.String(d.Id()),
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})
if err != nil {
return err
}
return nil
}