[performance] cached oauth database types (#2838)

* update token + client code to use struct caches

* add code comments

* slight tweak to default mem ratios

* fix envparsing

* add appropriate invalidate hooks

* update the tokenstore sweeping function to rely on caches

* update to use PutClient()

* add ClientID to list of token struct indices

internal/oauth/tokenstore.go

@@ -20,7 +20,6 @@ package oauth
 import (
 	"context"
 	"errors"
-	"fmt"
 	"time"
 
 	"github.com/superseriousbusiness/gotosocial/internal/db"
@@ -34,14 +33,14 @@ import (
 // tokenStore is an implementation of oauth2.TokenStore, which uses our db interface as a storage backend.
 type tokenStore struct {
 	oauth2.TokenStore
-	db db.Basic
+	db db.DB
 }
 
 // newTokenStore returns a token store that satisfies the oauth2.TokenStore interface.
 //
 // In order to allow tokens to 'expire', it will also set off a goroutine that iterates through
 // the tokens in the DB once per minute and deletes any that have expired.
-func newTokenStore(ctx context.Context, db db.Basic) oauth2.TokenStore {
+func newTokenStore(ctx context.Context, db db.DB) oauth2.TokenStore {
 	ts := &tokenStore{
 		db: db,
 	}
@@ -69,19 +68,19 @@ func newTokenStore(ctx context.Context, db db.Basic) oauth2.TokenStore {
 func (ts *tokenStore) sweep(ctx context.Context) error {
 	// select *all* tokens from the db
 	// todo: if this becomes expensive (ie., there are fucking LOADS of tokens) then figure out a better way.
-	tokens := new([]*gtsmodel.Token)
-	if err := ts.db.GetAll(ctx, tokens); err != nil {
+	tokens, err := ts.db.GetAllTokens(ctx)
+	if err != nil {
 		return err
 	}
 
 	// iterate through and remove expired tokens
 	now := time.Now()
-	for _, dbt := range *tokens {
+	for _, dbt := range tokens {
 		// The zero value of a time.Time is 00:00 january 1 1970, which will always be before now. So:
 		// we only want to check if a token expired before now if the expiry time is *not zero*;
 		// ie., if it's been explicity set.
 		if !dbt.CodeExpiresAt.IsZero() && dbt.CodeExpiresAt.Before(now) || !dbt.RefreshExpiresAt.IsZero() && dbt.RefreshExpiresAt.Before(now) || !dbt.AccessExpiresAt.IsZero() && dbt.AccessExpiresAt.Before(now) {
-			if err := ts.db.DeleteByID(ctx, dbt.ID, dbt); err != nil {
+			if err := ts.db.DeleteTokenByID(ctx, dbt.ID); err != nil {
 				return err
 			}
 		}
@@ -107,67 +106,49 @@ func (ts *tokenStore) Create(ctx context.Context, info oauth2.TokenInfo) error {
 		dbt.ID = dbtID
 	}
 
-	if err := ts.db.Put(ctx, dbt); err != nil {
-		return fmt.Errorf("error in tokenstore create: %s", err)
-	}
-	return nil
+	return ts.db.PutToken(ctx, dbt)
 }
 
 // RemoveByCode deletes a token from the DB based on the Code field
 func (ts *tokenStore) RemoveByCode(ctx context.Context, code string) error {
-	return ts.db.DeleteWhere(ctx, []db.Where{{Key: "code", Value: code}}, &gtsmodel.Token{})
+	return ts.db.DeleteTokenByCode(ctx, code)
 }
 
 // RemoveByAccess deletes a token from the DB based on the Access field
 func (ts *tokenStore) RemoveByAccess(ctx context.Context, access string) error {
-	return ts.db.DeleteWhere(ctx, []db.Where{{Key: "access", Value: access}}, &gtsmodel.Token{})
+	return ts.db.DeleteTokenByAccess(ctx, access)
 }
 
 // RemoveByRefresh deletes a token from the DB based on the Refresh field
 func (ts *tokenStore) RemoveByRefresh(ctx context.Context, refresh string) error {
-	return ts.db.DeleteWhere(ctx, []db.Where{{Key: "refresh", Value: refresh}}, &gtsmodel.Token{})
+	return ts.db.DeleteTokenByRefresh(ctx, refresh)
 }
 
 // GetByCode selects a token from the DB based on the Code field
 func (ts *tokenStore) GetByCode(ctx context.Context, code string) (oauth2.TokenInfo, error) {
-	if code == "" {
-		return nil, nil
-	}
-	dbt := &gtsmodel.Token{
-		Code: code,
-	}
-	if err := ts.db.GetWhere(ctx, []db.Where{{Key: "code", Value: code}}, dbt); err != nil {
+	token, err := ts.db.GetTokenByCode(ctx, code)
+	if err != nil {
 		return nil, err
 	}
-	return DBTokenToToken(dbt), nil
+	return DBTokenToToken(token), nil
 }
 
 // GetByAccess selects a token from the DB based on the Access field
 func (ts *tokenStore) GetByAccess(ctx context.Context, access string) (oauth2.TokenInfo, error) {
-	if access == "" {
-		return nil, nil
-	}
-	dbt := &gtsmodel.Token{
-		Access: access,
-	}
-	if err := ts.db.GetWhere(ctx, []db.Where{{Key: "access", Value: access}}, dbt); err != nil {
+	token, err := ts.db.GetTokenByAccess(ctx, access)
+	if err != nil {
 		return nil, err
 	}
-	return DBTokenToToken(dbt), nil
+	return DBTokenToToken(token), nil
 }
 
 // GetByRefresh selects a token from the DB based on the Refresh field
 func (ts *tokenStore) GetByRefresh(ctx context.Context, refresh string) (oauth2.TokenInfo, error) {
-	if refresh == "" {
-		return nil, nil
-	}
-	dbt := &gtsmodel.Token{
-		Refresh: refresh,
-	}
-	if err := ts.db.GetWhere(ctx, []db.Where{{Key: "refresh", Value: refresh}}, dbt); err != nil {
+	token, err := ts.db.GetTokenByRefresh(ctx, refresh)
+	if err != nil {
 		return nil, err
 	}
-	return DBTokenToToken(dbt), nil
+	return DBTokenToToken(token), nil
 }
 
 /*