From cd3b5bef09f99447a8580e7a63b4412d97aa1b30 Mon Sep 17 00:00:00 2001
From: Jon Nangle <jon.nangle@ft.com>
Date: Wed, 27 Mar 2024 16:20:00 +0000
Subject: [PATCH] Serialize edge deployment backend updates via mutex (#213)

---
 provider/lib.go                                             | 2 ++
 provider/provider.go                                        | 4 ++++
 provider/resource_edge_deployment_service_update_backend.go | 3 +++
 3 files changed, 9 insertions(+)

diff --git a/provider/lib.go b/provider/lib.go
index be30812..36b2f6f 100644
--- a/provider/lib.go
+++ b/provider/lib.go
@@ -5,6 +5,7 @@ import (
 	"sort"
 	"strconv"
 	"strings"
+	"sync"
 
 	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
 	"github.com/signalsciences/go-sigsci"
@@ -24,6 +25,7 @@ func suppressRequestLoggingDefaultDiffs(k, old, new string, d *schema.ResourceDa
 type providerMetadata struct {
 	Corp   string
 	Client sigsci.Client
+	Mutex  *sync.Mutex
 }
 
 func flattenStringArray(entries []string) []interface{} {
diff --git a/provider/provider.go b/provider/provider.go
index 40b95e3..315ba67 100644
--- a/provider/provider.go
+++ b/provider/provider.go
@@ -4,6 +4,7 @@ import (
 	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
 	"github.com/hashicorp/terraform-plugin-sdk/terraform"
 	"github.com/signalsciences/go-sigsci"
+	"sync"
 )
 
 // Provider is the Signalsciences terraform provider, returns a terraform.ResourceProvider
@@ -89,6 +90,8 @@ func Provider() terraform.ResourceProvider {
 	return provider
 }
 
+var ProviderMutex sync.Mutex
+
 func providerConfigure() schema.ConfigureFunc {
 	return func(d *schema.ResourceData) (interface{}, error) {
 		config := Config{
@@ -106,6 +109,7 @@ func providerConfigure() schema.ConfigureFunc {
 		metadata := providerMetadata{
 			Corp:   d.Get("corp").(string),
 			Client: client.(sigsci.Client),
+			Mutex:  &ProviderMutex,
 		}
 
 		validate := d.Get("validate").(bool)
diff --git a/provider/resource_edge_deployment_service_update_backend.go b/provider/resource_edge_deployment_service_update_backend.go
index 4effc1f..bc5ff42 100644
--- a/provider/resource_edge_deployment_service_update_backend.go
+++ b/provider/resource_edge_deployment_service_update_backend.go
@@ -37,6 +37,9 @@ func updateEdgeDeploymentServiceBackend(d *schema.ResourceData, m interface{}) e
 
 	d.SetId(d.Get("fastly_sid").(string))
 
+	ProviderMutex.Lock()
+	defer ProviderMutex.Unlock()
+
 	return pm.Client.UpdateEdgeDeploymentBackends(pm.Corp, d.Get("site_short_name").(string), d.Get("fastly_sid").(string))
 
 }