feat: add revision number to proxy and layers to identify changes

internal/store/testsuite/proxy_repository.go

@@ -3,6 +3,7 @@ package testsuite
 import (
 	"context"
 	"reflect"
+	"sync"
 	"testing"
 
 	"forge.cadoles.com/cadoles/bouncer/internal/store"
@@ -51,6 +52,10 @@ var proxyRepositoryTestCases = []proxyRepositoryTestCase{
 				return errors.Errorf("proxy.UpdatedAt should not be zero value")
 			}
 
+			if proxy.Revision != 0 {
+				return errors.Errorf("proxy.Revision should be zero")
+			}
+
 			return nil
 		},
 	},
@@ -99,6 +104,10 @@ var proxyRepositoryTestCases = []proxyRepositoryTestCase{
 				return errors.Errorf("foundProxy.UpdatedAt: expected '%v', got '%v'", createdProxy.UpdatedAt, foundProxy.UpdatedAt)
 			}
 
+			if foundProxy.Revision != 0 {
+				return errors.Errorf("foundProxy.Revision should be zero")
+			}
+
 			return nil
 		},
 	},
@@ -194,6 +203,84 @@ var proxyRepositoryTestCases = []proxyRepositoryTestCase{
 				return errors.Errorf("err: expected store.ErrAlreadyExists, got '%+v'", err)
 			}
 
+			return nil
+		},
+	},
+	{
+		Name: "Create then update proxy",
+		Do: func(repo store.ProxyRepository) error {
+			ctx := context.Background()
+
+			to := "http://example.com"
+
+			var name store.ProxyName = "create_then_update_proxy"
+
+			createdProxy, err := repo.CreateProxy(ctx, name, to, "127.0.0.1:*", "localhost:*")
+			if err != nil {
+				return errors.Wrap(err, "err should be nil")
+			}
+
+			if createdProxy.Revision != 0 {
+				return errors.Errorf("createdProxy.Revision should be zero")
+			}
+
+			updatedProxy, err := repo.UpdateProxy(ctx, name)
+			if err != nil {
+				return errors.Wrap(err, "err should be nil")
+			}
+
+			if e, g := 1, updatedProxy.Revision; e != g {
+				return errors.Errorf("updatedProxy.Revision: expected '%v', got '%v'", e, g)
+			}
+
+			return nil
+		},
+	},
+	{
+		Name: "Update proxy concurrently",
+		Do: func(repo store.ProxyRepository) error {
+			ctx := context.Background()
+
+			to := "http://example.com"
+
+			var name store.ProxyName = "update_proxy_concurrently"
+
+			createdProxy, err := repo.CreateProxy(ctx, name, to, "127.0.0.1:*", "localhost:*")
+			if err != nil {
+				return errors.Wrap(err, "err should be nil")
+			}
+
+			if createdProxy.Revision != 0 {
+				return errors.Errorf("createdProxy.Revision should be zero")
+			}
+
+			var wg sync.WaitGroup
+
+			total := 100
+
+			wg.Add(total)
+
+			for i := 0; i < total; i++ {
+				go func(i int) {
+					defer wg.Done()
+
+					if _, err := repo.UpdateProxy(ctx, name); err != nil {
+						panic(errors.Wrap(err, "err should be nil"))
+					}
+				}(i)
+			}
+
+			wg.Wait()
+
+			proxy, err := repo.GetProxy(ctx, name)
+			if err != nil {
+				return errors.Wrap(err, "err should be nil")
+			}
+
+			if e, g := total, proxy.Revision; e != g {
+				return errors.Errorf("proxy.Revision: expected '%v', got '%v'", e, g)
+			}
+
 			return nil
 		},
 	},