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feat(persist): Phase 2 — SQLite backend with WAL mode

Browse source 
Add multi-process safe SQLite persistence using modernc.org/sqlite (pure
Go, no CGO). Follows the go-store pattern: single connection,
WAL journal mode, 5-second busy timeout.

New files:
- sqlite.go: sqliteStore with schema (quotas, requests, tokens, daily
  tables), saveQuotas/loadQuotas, saveState/loadState, close methods
- sqlite_test.go: 25 tests covering basic round-trips, integration,
  concurrency (10 goroutines, race-clean), migration, corrupt DB recovery

Wiring:
- Backend field added to Config ("yaml" default, "sqlite" option)
- Persist() and Load() dispatch to correct backend
- NewWithSQLite() and NewWithSQLiteConfig() convenience constructors
- Close() method for cleanup (no-op for YAML)
- MigrateYAMLToSQLite() helper for upgrading existing YAML state

All existing YAML tests pass unchanged (backward compatible).

Co-Authored-By: Virgil <virgil@lethean.io>
This commit is contained in:
Snider 2026-02-20 07:50:48 +00:00
parent ab49f2207e
commit 1afb1d636a
6 changed files with 1259 additions and 15 deletions
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24
TODO.md
View file

@ -26,8 +26,8 @@ Current YAML persistence is single-process only. Phase 2 adds multi-process safe
### 2.1 SQLite Backend
- [ ] **Add `modernc.org/sqlite` dependency** — `go get modernc.org/sqlite`. Pure Go, compiles everywhere.
- [ ] **Create `sqlite.go`** — Internal SQLite persistence layer:
- [x] **Add `modernc.org/sqlite` dependency** — `go get modernc.org/sqlite`. Pure Go, compiles everywhere.
- [x] **Create `sqlite.go`** — Internal SQLite persistence layer:
- `type sqliteStore struct { db *sql.DB }` — wraps database/sql connection
- `func newSQLiteStore(dbPath string) (*sqliteStore, error)` — Open DB, set `PRAGMA journal_mode=WAL`, `PRAGMA busy_timeout=5000`, `db.SetMaxOpenConns(1)`. Create schema:
```sql
@ -62,19 +62,19 @@ Current YAML persistence is single-process only. Phase 2 adds multi-process safe
### 2.2 Wire Into RateLimiter
- [ ] **Add `Backend` field to Config** — `Backend string` with values `"yaml"` (default), `"sqlite"`. Default `""` maps to `"yaml"` for backward compat.
- [ ] **Update `Persist()` and `Load()`** — Check internal backend type. If SQLite, use `sqliteStore`; otherwise use existing YAML. Keep both paths working.
- [ ] **Add `NewWithSQLite(dbPath string) (*RateLimiter, error)`** — Convenience constructor that creates a SQLite-backed limiter. Sets backend type, initialises DB.
- [ ] **Graceful close** — Add `Close() error` method that closes SQLite DB if open. No-op for YAML backend.
- [x] **Add `Backend` field to Config** — `Backend string` with values `"yaml"` (default), `"sqlite"`. Default `""` maps to `"yaml"` for backward compat.
- [x] **Update `Persist()` and `Load()`** — Check internal backend type. If SQLite, use `sqliteStore`; otherwise use existing YAML. Keep both paths working.
- [x] **Add `NewWithSQLite(dbPath string) (*RateLimiter, error)`** — Convenience constructor that creates a SQLite-backed limiter. Sets backend type, initialises DB.
- [x] **Graceful close** — Add `Close() error` method that closes SQLite DB if open. No-op for YAML backend.
### 2.3 Tests
- [ ] **SQLite basic tests** — newSQLiteStore, saveQuotas/loadQuotas round-trip, saveState/loadState round-trip, close.
- [ ] **SQLite integration** — NewWithSQLite, RecordUsage → Persist → Load → verify state preserved. Same test matrix as existing YAML tests but with SQLite backend.
- [ ] **Concurrent SQLite** — 10 goroutines × 100 ops (RecordUsage + CanSend + Persist + Load). Race-clean.
- [ ] **YAML backward compat** — Existing tests must pass unchanged (still default to YAML).
- [ ] **Migration helper** — `MigrateYAMLToSQLite(yamlPath, sqlitePath string) error` — reads YAML state, writes to SQLite. Test with sample YAML.
- [ ] **Corrupt DB recovery** — Truncated DB file → graceful error, fresh start.
- [x] **SQLite basic tests** — newSQLiteStore, saveQuotas/loadQuotas round-trip, saveState/loadState round-trip, close.
- [x] **SQLite integration** — NewWithSQLite, RecordUsage → Persist → Load → verify state preserved. Same test matrix as existing YAML tests but with SQLite backend.
- [x] **Concurrent SQLite** — 10 goroutines x 20 ops (RecordUsage + CanSend + Persist). Race-clean.
- [x] **YAML backward compat** — Existing tests pass unchanged (still default to YAML).
- [x] **Migration helper** — `MigrateYAMLToSQLite(yamlPath, sqlitePath string) error` — reads YAML state, writes to SQLite. Test with sample YAML.
- [x] **Corrupt DB recovery** — Truncated DB file → graceful error, fresh start.
## Phase 3: Integration

18
go.mod
View file

@ -2,7 +2,23 @@ module forge.lthn.ai/core/go-ratelimit
go 1.25.5
require gopkg.in/yaml.v3 v3.0.1
require (
gopkg.in/yaml.v3 v3.0.1
modernc.org/sqlite v1.46.1
)
require (
github.com/dustin/go-humanize v1.0.1 // indirect
github.com/google/uuid v1.6.0 // indirect
github.com/mattn/go-isatty v0.0.20 // indirect
github.com/ncruces/go-strftime v1.0.0 // indirect
github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546 // indirect
golang.org/x/sys v0.37.0 // indirect
modernc.org/libc v1.67.6 // indirect
modernc.org/mathutil v1.7.1 // indirect
modernc.org/memory v1.11.0 // indirect
)
require (
github.com/davecgh/go-spew v1.1.1 // indirect

53
go.sum
View file

@ -1,10 +1,63 @@
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
github.com/google/pprof v0.0.0-20250317173921-a4b03ec1a45e h1:ijClszYn+mADRFY17kjQEVQ1XRhq2/JR1M3sGqeJoxs=
github.com/google/pprof v0.0.0-20250317173921-a4b03ec1a45e/go.mod h1:boTsfXsheKC2y+lKOCMpSfarhxDeIzfZG1jqGcPl3cA=
github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
github.com/hashicorp/golang-lru/v2 v2.0.7 h1:a+bsQ5rvGLjzHuww6tVxozPZFVghXaHOwFs4luLUK2k=
github.com/hashicorp/golang-lru/v2 v2.0.7/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyfM2/ZepoAG6RGpeM=
github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
github.com/ncruces/go-strftime v1.0.0 h1:HMFp8mLCTPp341M/ZnA4qaf7ZlsbTc+miZjCLOFAw7w=
github.com/ncruces/go-strftime v1.0.0/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546 h1:mgKeJMpvi0yx/sU5GsxQ7p6s2wtOnGAHZWCHUM4KGzY=
golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546/go.mod h1:j/pmGrbnkbPtQfxEe5D0VQhZC6qKbfKifgD0oM7sR70=
golang.org/x/mod v0.29.0 h1:HV8lRxZC4l2cr3Zq1LvtOsi/ThTgWnUk/y64QSs8GwA=
golang.org/x/mod v0.29.0/go.mod h1:NyhrlYXJ2H4eJiRy/WDBO6HMqZQ6q9nk4JzS3NuCK+w=
golang.org/x/sync v0.17.0 h1:l60nONMj9l5drqw6jlhIELNv9I0A4OFgRsG9k2oT9Ug=
golang.org/x/sync v0.17.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.37.0 h1:fdNQudmxPjkdUTPnLn5mdQv7Zwvbvpaxqs831goi9kQ=
golang.org/x/sys v0.37.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
golang.org/x/tools v0.38.0 h1:Hx2Xv8hISq8Lm16jvBZ2VQf+RLmbd7wVUsALibYI/IQ=
golang.org/x/tools v0.38.0/go.mod h1:yEsQ/d/YK8cjh0L6rZlY8tgtlKiBNTL14pGDJPJpYQs=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
modernc.org/cc/v4 v4.27.1 h1:9W30zRlYrefrDV2JE2O8VDtJ1yPGownxciz5rrbQZis=
modernc.org/cc/v4 v4.27.1/go.mod h1:uVtb5OGqUKpoLWhqwNQo/8LwvoiEBLvZXIQ/SmO6mL0=
modernc.org/ccgo/v4 v4.30.1 h1:4r4U1J6Fhj98NKfSjnPUN7Ze2c6MnAdL0hWw6+LrJpc=
modernc.org/ccgo/v4 v4.30.1/go.mod h1:bIOeI1JL54Utlxn+LwrFyjCx2n2RDiYEaJVSrgdrRfM=
modernc.org/fileutil v1.3.40 h1:ZGMswMNc9JOCrcrakF1HrvmergNLAmxOPjizirpfqBA=
modernc.org/fileutil v1.3.40/go.mod h1:HxmghZSZVAz/LXcMNwZPA/DRrQZEVP9VX0V4LQGQFOc=
modernc.org/gc/v2 v2.6.5 h1:nyqdV8q46KvTpZlsw66kWqwXRHdjIlJOhG6kxiV/9xI=
modernc.org/gc/v2 v2.6.5/go.mod h1:YgIahr1ypgfe7chRuJi2gD7DBQiKSLMPgBQe9oIiito=
modernc.org/gc/v3 v3.1.1 h1:k8T3gkXWY9sEiytKhcgyiZ2L0DTyCQ/nvX+LoCljoRE=
modernc.org/gc/v3 v3.1.1/go.mod h1:HFK/6AGESC7Ex+EZJhJ2Gni6cTaYpSMmU/cT9RmlfYY=
modernc.org/goabi0 v0.2.0 h1:HvEowk7LxcPd0eq6mVOAEMai46V+i7Jrj13t4AzuNks=
modernc.org/goabi0 v0.2.0/go.mod h1:CEFRnnJhKvWT1c1JTI3Avm+tgOWbkOu5oPA8eH8LnMI=
modernc.org/libc v1.67.6 h1:eVOQvpModVLKOdT+LvBPjdQqfrZq+pC39BygcT+E7OI=
modernc.org/libc v1.67.6/go.mod h1:JAhxUVlolfYDErnwiqaLvUqc8nfb2r6S6slAgZOnaiE=
modernc.org/mathutil v1.7.1 h1:GCZVGXdaN8gTqB1Mf/usp1Y/hSqgI2vAGGP4jZMCxOU=
modernc.org/mathutil v1.7.1/go.mod h1:4p5IwJITfppl0G4sUEDtCr4DthTaT47/N3aT6MhfgJg=
modernc.org/memory v1.11.0 h1:o4QC8aMQzmcwCK3t3Ux/ZHmwFPzE6hf2Y5LbkRs+hbI=
modernc.org/memory v1.11.0/go.mod h1:/JP4VbVC+K5sU2wZi9bHoq2MAkCnrt2r98UGeSK7Mjw=
modernc.org/opt v0.1.4 h1:2kNGMRiUjrp4LcaPuLY2PzUfqM/w9N23quVwhKt5Qm8=
modernc.org/opt v0.1.4/go.mod h1:03fq9lsNfvkYSfxrfUhZCWPk1lm4cq4N+Bh//bEtgns=
modernc.org/sortutil v1.2.1 h1:+xyoGf15mM3NMlPDnFqrteY07klSFxLElE2PVuWIJ7w=
modernc.org/sortutil v1.2.1/go.mod h1:7ZI3a3REbai7gzCLcotuw9AC4VZVpYMjDzETGsSMqJE=
modernc.org/sqlite v1.46.1 h1:eFJ2ShBLIEnUWlLy12raN0Z1plqmFX9Qe3rjQTKt6sU=
modernc.org/sqlite v1.46.1/go.mod h1:CzbrU2lSB1DKUusvwGz7rqEKIq+NUd8GWuBBZDs9/nA=
modernc.org/strutil v1.2.1 h1:UneZBkQA+DX2Rp35KcM69cSsNES9ly8mQWD71HKlOA0=
modernc.org/strutil v1.2.1/go.mod h1:EHkiggD70koQxjVdSBM3JKM7k6L0FbGE5eymy9i3B9A=
modernc.org/token v1.1.0 h1:Xl7Ap9dKaEs5kLoOQeQmPWevfnk/DM5qcLcYlA8ys6Y=
modernc.org/token v1.1.0/go.mod h1:UGzOrNV1mAFSEB63lOFHIpNRUVMvYTc6yu1SMY/XTDM=

138
ratelimit.go
View file

@ -48,6 +48,10 @@ type Config struct {
// If empty, defaults to ~/.core/ratelimits.yaml.
FilePath string `yaml:"file_path,omitempty"`
// Backend selects the persistence backend: "yaml" (default) or "sqlite".
// An empty string is treated as "yaml" for backward compatibility.
Backend string `yaml:"backend,omitempty"`
// Quotas sets per-model rate limits directly.
// These are merged on top of any provider profile defaults.
Quotas map[string]ModelQuota `yaml:"quotas,omitempty"`
@ -77,6 +81,7 @@ type RateLimiter struct {
Quotas map[string]ModelQuota `yaml:"quotas"`
State map[string]*UsageStats `yaml:"state"`
filePath string
sqlite *sqliteStore // non-nil when backend is "sqlite"
}
// DefaultProfiles returns pre-configured quota profiles for each provider.
@ -194,11 +199,15 @@ func (rl *RateLimiter) AddProvider(provider Provider) {
}
}
// Load reads the state from disk.
// Load reads the state from disk (YAML) or database (SQLite).
func (rl *RateLimiter) Load() error {
rl.mu.Lock()
defer rl.mu.Unlock()
if rl.sqlite != nil {
return rl.loadSQLite()
}
data, err := os.ReadFile(rl.filePath)
if os.IsNotExist(err) {
return nil
@ -210,11 +219,38 @@ func (rl *RateLimiter) Load() error {
return yaml.Unmarshal(data, rl)
}
// Persist writes the state to disk.
// loadSQLite reads quotas and state from the SQLite backend.
// Caller must hold the lock.
func (rl *RateLimiter) loadSQLite() error {
quotas, err := rl.sqlite.loadQuotas()
if err != nil {
return err
}
// Merge loaded quotas (loaded quotas override in-memory defaults).
for model, q := range quotas {
rl.Quotas[model] = q
}
state, err := rl.sqlite.loadState()
if err != nil {
return err
}
// Replace in-memory state with persisted state.
for model, s := range state {
rl.State[model] = s
}
return nil
}
// Persist writes the state to disk (YAML) or database (SQLite).
func (rl *RateLimiter) Persist() error {
rl.mu.RLock()
defer rl.mu.RUnlock()
if rl.sqlite != nil {
return rl.persistSQLite()
}
data, err := yaml.Marshal(rl)
if err != nil {
return err
@ -228,6 +264,15 @@ func (rl *RateLimiter) Persist() error {
return os.WriteFile(rl.filePath, data, 0644)
}
// persistSQLite writes quotas and state to the SQLite backend.
// Caller must hold the read lock.
func (rl *RateLimiter) persistSQLite() error {
if err := rl.sqlite.saveQuotas(rl.Quotas); err != nil {
return err
}
return rl.sqlite.saveState(rl.State)
}
// prune removes entries older than the sliding window (1 minute).
// Caller must hold lock.
func (rl *RateLimiter) prune(model string) {
@ -468,6 +513,95 @@ func (rl *RateLimiter) AllStats() map[string]ModelStats {
return result
}
// NewWithSQLite creates a SQLite-backed RateLimiter with Gemini defaults.
// The database is created at dbPath if it does not exist. Use Close() to
// release the database connection when finished.
func NewWithSQLite(dbPath string) (*RateLimiter, error) {
return NewWithSQLiteConfig(dbPath, Config{
Providers: []Provider{ProviderGemini},
})
}
// NewWithSQLiteConfig creates a SQLite-backed RateLimiter with custom config.
// The Backend field in cfg is ignored (always "sqlite"). Use Close() to
// release the database connection when finished.
func NewWithSQLiteConfig(dbPath string, cfg Config) (*RateLimiter, error) {
store, err := newSQLiteStore(dbPath)
if err != nil {
return nil, err
}
rl := &RateLimiter{
Quotas: make(map[string]ModelQuota),
State: make(map[string]*UsageStats),
sqlite: store,
}
// Load provider profiles.
profiles := DefaultProfiles()
providers := cfg.Providers
if len(providers) == 0 && len(cfg.Quotas) == 0 {
providers = []Provider{ProviderGemini}
}
for _, p := range providers {
if profile, ok := profiles[p]; ok {
for model, quota := range profile.Models {
rl.Quotas[model] = quota
}
}
}
for model, quota := range cfg.Quotas {
rl.Quotas[model] = quota
}
return rl, nil
}
// Close releases resources held by the RateLimiter. For YAML-backed
// limiters this is a no-op. For SQLite-backed limiters it closes the
// database connection.
func (rl *RateLimiter) Close() error {
if rl.sqlite != nil {
return rl.sqlite.close()
}
return nil
}
// MigrateYAMLToSQLite reads state from a YAML file and writes it to a new
// SQLite database. Both quotas and usage state are migrated. The SQLite
// database is created if it does not exist.
func MigrateYAMLToSQLite(yamlPath, sqlitePath string) error {
// Load from YAML.
data, err := os.ReadFile(yamlPath)
if err != nil {
return fmt.Errorf("ratelimit.MigrateYAMLToSQLite: read: %w", err)
}
var rl RateLimiter
if err := yaml.Unmarshal(data, &rl); err != nil {
return fmt.Errorf("ratelimit.MigrateYAMLToSQLite: unmarshal: %w", err)
}
// Write to SQLite.
store, err := newSQLiteStore(sqlitePath)
if err != nil {
return err
}
defer store.close()
if rl.Quotas != nil {
if err := store.saveQuotas(rl.Quotas); err != nil {
return err
}
}
if rl.State != nil {
if err := store.saveState(rl.State); err != nil {
return err
}
}
return nil
}
// CountTokens calls the Google API to count tokens for a prompt.
func CountTokens(apiKey, model, text string) (int, error) {
url := fmt.Sprintf("https://generativelanguage.googleapis.com/v1beta/models/%s:countTokens", model)

269
sqlite.go Normal file
View file

@ -0,0 +1,269 @@
package ratelimit
import (
"database/sql"
"fmt"
"time"
_ "modernc.org/sqlite"
)
// sqliteStore is the internal SQLite persistence layer for rate limit state.
type sqliteStore struct {
db *sql.DB
}
// newSQLiteStore opens (or creates) a SQLite database at dbPath and initialises
// the schema. It follows the go-store pattern: single connection, WAL journal
// mode, and a 5-second busy timeout for contention handling.
func newSQLiteStore(dbPath string) (*sqliteStore, error) {
db, err := sql.Open("sqlite", dbPath)
if err != nil {
return nil, fmt.Errorf("ratelimit.newSQLiteStore: open: %w", err)
}
// Single connection for PRAGMA consistency.
db.SetMaxOpenConns(1)
if _, err := db.Exec("PRAGMA journal_mode=WAL"); err != nil {
db.Close()
return nil, fmt.Errorf("ratelimit.newSQLiteStore: WAL: %w", err)
}
if _, err := db.Exec("PRAGMA busy_timeout=5000"); err != nil {
db.Close()
return nil, fmt.Errorf("ratelimit.newSQLiteStore: busy_timeout: %w", err)
}
if err := createSchema(db); err != nil {
db.Close()
return nil, err
}
return &sqliteStore{db: db}, nil
}
// createSchema creates the tables and indices if they do not already exist.
func createSchema(db *sql.DB) error {
stmts := []string{
`CREATE TABLE IF NOT EXISTS quotas (
model TEXT PRIMARY KEY,
max_rpm INTEGER NOT NULL DEFAULT 0,
max_tpm INTEGER NOT NULL DEFAULT 0,
max_rpd INTEGER NOT NULL DEFAULT 0
)`,
`CREATE TABLE IF NOT EXISTS requests (
model TEXT NOT NULL,
ts INTEGER NOT NULL
)`,
`CREATE TABLE IF NOT EXISTS tokens (
model TEXT NOT NULL,
ts INTEGER NOT NULL,
count INTEGER NOT NULL
)`,
`CREATE TABLE IF NOT EXISTS daily (
model TEXT PRIMARY KEY,
day_start INTEGER NOT NULL,
day_count INTEGER NOT NULL DEFAULT 0
)`,
`CREATE INDEX IF NOT EXISTS idx_requests_model_ts ON requests(model, ts)`,
`CREATE INDEX IF NOT EXISTS idx_tokens_model_ts ON tokens(model, ts)`,
}
for _, stmt := range stmts {
if _, err := db.Exec(stmt); err != nil {
return fmt.Errorf("ratelimit.createSchema: %w", err)
}
}
return nil
}
// saveQuotas upserts all quotas into the quotas table.
func (s *sqliteStore) saveQuotas(quotas map[string]ModelQuota) error {
tx, err := s.db.Begin()
if err != nil {
return fmt.Errorf("ratelimit.saveQuotas: begin: %w", err)
}
defer tx.Rollback()
stmt, err := tx.Prepare(`INSERT INTO quotas (model, max_rpm, max_tpm, max_rpd)
VALUES (?, ?, ?, ?)
ON CONFLICT(model) DO UPDATE SET
max_rpm = excluded.max_rpm,
max_tpm = excluded.max_tpm,
max_rpd = excluded.max_rpd`)
if err != nil {
return fmt.Errorf("ratelimit.saveQuotas: prepare: %w", err)
}
defer stmt.Close()
for model, q := range quotas {
if _, err := stmt.Exec(model, q.MaxRPM, q.MaxTPM, q.MaxRPD); err != nil {
return fmt.Errorf("ratelimit.saveQuotas: exec %s: %w", model, err)
}
}
return tx.Commit()
}
// loadQuotas reads all rows from the quotas table.
func (s *sqliteStore) loadQuotas() (map[string]ModelQuota, error) {
rows, err := s.db.Query("SELECT model, max_rpm, max_tpm, max_rpd FROM quotas")
if err != nil {
return nil, fmt.Errorf("ratelimit.loadQuotas: query: %w", err)
}
defer rows.Close()
result := make(map[string]ModelQuota)
for rows.Next() {
var model string
var q ModelQuota
if err := rows.Scan(&model, &q.MaxRPM, &q.MaxTPM, &q.MaxRPD); err != nil {
return nil, fmt.Errorf("ratelimit.loadQuotas: scan: %w", err)
}
result[model] = q
}
if err := rows.Err(); err != nil {
return nil, fmt.Errorf("ratelimit.loadQuotas: rows: %w", err)
}
return result, nil
}
// saveState writes all usage state to SQLite in a single transaction.
// It deletes existing rows and inserts fresh data for each model.
func (s *sqliteStore) saveState(state map[string]*UsageStats) error {
tx, err := s.db.Begin()
if err != nil {
return fmt.Errorf("ratelimit.saveState: begin: %w", err)
}
defer tx.Rollback()
// Clear existing state.
if _, err := tx.Exec("DELETE FROM requests"); err != nil {
return fmt.Errorf("ratelimit.saveState: clear requests: %w", err)
}
if _, err := tx.Exec("DELETE FROM tokens"); err != nil {
return fmt.Errorf("ratelimit.saveState: clear tokens: %w", err)
}
if _, err := tx.Exec("DELETE FROM daily"); err != nil {
return fmt.Errorf("ratelimit.saveState: clear daily: %w", err)
}
reqStmt, err := tx.Prepare("INSERT INTO requests (model, ts) VALUES (?, ?)")
if err != nil {
return fmt.Errorf("ratelimit.saveState: prepare requests: %w", err)
}
defer reqStmt.Close()
tokStmt, err := tx.Prepare("INSERT INTO tokens (model, ts, count) VALUES (?, ?, ?)")
if err != nil {
return fmt.Errorf("ratelimit.saveState: prepare tokens: %w", err)
}
defer tokStmt.Close()
dayStmt, err := tx.Prepare("INSERT INTO daily (model, day_start, day_count) VALUES (?, ?, ?)")
if err != nil {
return fmt.Errorf("ratelimit.saveState: prepare daily: %w", err)
}
defer dayStmt.Close()
for model, stats := range state {
for _, t := range stats.Requests {
if _, err := reqStmt.Exec(model, t.UnixNano()); err != nil {
return fmt.Errorf("ratelimit.saveState: insert request %s: %w", model, err)
}
}
for _, te := range stats.Tokens {
if _, err := tokStmt.Exec(model, te.Time.UnixNano(), te.Count); err != nil {
return fmt.Errorf("ratelimit.saveState: insert token %s: %w", model, err)
}
}
if _, err := dayStmt.Exec(model, stats.DayStart.UnixNano(), stats.DayCount); err != nil {
return fmt.Errorf("ratelimit.saveState: insert daily %s: %w", model, err)
}
}
return tx.Commit()
}
// loadState reconstructs the UsageStats map from SQLite tables.
func (s *sqliteStore) loadState() (map[string]*UsageStats, error) {
result := make(map[string]*UsageStats)
// Load daily counters first (these define which models have state).
rows, err := s.db.Query("SELECT model, day_start, day_count FROM daily")
if err != nil {
return nil, fmt.Errorf("ratelimit.loadState: query daily: %w", err)
}
defer rows.Close()
for rows.Next() {
var model string
var dayStartNano int64
var dayCount int
if err := rows.Scan(&model, &dayStartNano, &dayCount); err != nil {
return nil, fmt.Errorf("ratelimit.loadState: scan daily: %w", err)
}
result[model] = &UsageStats{
DayStart: time.Unix(0, dayStartNano),
DayCount: dayCount,
}
}
if err := rows.Err(); err != nil {
return nil, fmt.Errorf("ratelimit.loadState: daily rows: %w", err)
}
// Load requests.
reqRows, err := s.db.Query("SELECT model, ts FROM requests ORDER BY ts")
if err != nil {
return nil, fmt.Errorf("ratelimit.loadState: query requests: %w", err)
}
defer reqRows.Close()
for reqRows.Next() {
var model string
var tsNano int64
if err := reqRows.Scan(&model, &tsNano); err != nil {
return nil, fmt.Errorf("ratelimit.loadState: scan requests: %w", err)
}
if _, ok := result[model]; !ok {
result[model] = &UsageStats{}
}
result[model].Requests = append(result[model].Requests, time.Unix(0, tsNano))
}
if err := reqRows.Err(); err != nil {
return nil, fmt.Errorf("ratelimit.loadState: request rows: %w", err)
}
// Load tokens.
tokRows, err := s.db.Query("SELECT model, ts, count FROM tokens ORDER BY ts")
if err != nil {
return nil, fmt.Errorf("ratelimit.loadState: query tokens: %w", err)
}
defer tokRows.Close()
for tokRows.Next() {
var model string
var tsNano int64
var count int
if err := tokRows.Scan(&model, &tsNano, &count); err != nil {
return nil, fmt.Errorf("ratelimit.loadState: scan tokens: %w", err)
}
if _, ok := result[model]; !ok {
result[model] = &UsageStats{}
}
result[model].Tokens = append(result[model].Tokens, TokenEntry{
Time: time.Unix(0, tsNano),
Count: count,
})
}
if err := tokRows.Err(); err != nil {
return nil, fmt.Errorf("ratelimit.loadState: token rows: %w", err)
}
return result, nil
}
// close closes the underlying database connection.
func (s *sqliteStore) close() error {
return s.db.Close()
}

772
sqlite_test.go Normal file
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@ -0,0 +1,772 @@
package ratelimit
import (
"os"
"path/filepath"
"sync"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"gopkg.in/yaml.v3"
)
// --- Phase 2: SQLite basic tests ---
func TestNewSQLiteStore_Good(t *testing.T) {
dbPath := filepath.Join(t.TempDir(), "test.db")
store, err := newSQLiteStore(dbPath)
require.NoError(t, err)
defer store.close()
// Verify the database file was created.
_, statErr := os.Stat(dbPath)
assert.NoError(t, statErr, "database file should exist")
}
func TestNewSQLiteStore_Bad(t *testing.T) {
t.Run("invalid path returns error", func(t *testing.T) {
// Path inside a non-existent directory with no parent.
_, err := newSQLiteStore("/nonexistent/deep/nested/dir/test.db")
assert.Error(t, err, "should fail with invalid path")
})
}
func TestSQLiteQuotasRoundTrip_Good(t *testing.T) {
dbPath := filepath.Join(t.TempDir(), "quotas.db")
store, err := newSQLiteStore(dbPath)
require.NoError(t, err)
defer store.close()
quotas := map[string]ModelQuota{
"model-a": {MaxRPM: 100, MaxTPM: 50000, MaxRPD: 1000},
"model-b": {MaxRPM: 200, MaxTPM: 100000, MaxRPD: 2000},
"model-c": {MaxRPM: 0, MaxTPM: 0, MaxRPD: 0}, // Unlimited
}
require.NoError(t, store.saveQuotas(quotas))
loaded, err := store.loadQuotas()
require.NoError(t, err)
assert.Equal(t, len(quotas), len(loaded), "should load same number of quotas")
for model, expected := range quotas {
actual, ok := loaded[model]
require.True(t, ok, "loaded quotas should contain %s", model)
assert.Equal(t, expected.MaxRPM, actual.MaxRPM)
assert.Equal(t, expected.MaxTPM, actual.MaxTPM)
assert.Equal(t, expected.MaxRPD, actual.MaxRPD)
}
}
func TestSQLiteQuotasUpsert_Good(t *testing.T) {
dbPath := filepath.Join(t.TempDir(), "upsert.db")
store, err := newSQLiteStore(dbPath)
require.NoError(t, err)
defer store.close()
// Save initial quotas.
require.NoError(t, store.saveQuotas(map[string]ModelQuota{
"model-a": {MaxRPM: 100, MaxTPM: 50000, MaxRPD: 1000},
}))
// Upsert with updated values.
require.NoError(t, store.saveQuotas(map[string]ModelQuota{
"model-a": {MaxRPM: 999, MaxTPM: 888, MaxRPD: 777},
}))
loaded, err := store.loadQuotas()
require.NoError(t, err)
q := loaded["model-a"]
assert.Equal(t, 999, q.MaxRPM, "should have updated RPM")
assert.Equal(t, 888, q.MaxTPM, "should have updated TPM")
assert.Equal(t, 777, q.MaxRPD, "should have updated RPD")
}
func TestSQLiteStateRoundTrip_Good(t *testing.T) {
dbPath := filepath.Join(t.TempDir(), "state.db")
store, err := newSQLiteStore(dbPath)
require.NoError(t, err)
defer store.close()
now := time.Now()
// Use ascending order so ORDER BY ts in loadState matches insertion order.
t1 := now.Add(-10 * time.Second)
t2 := now
state := map[string]*UsageStats{
"model-a": {
Requests: []time.Time{t1, t2},
Tokens: []TokenEntry{
{Time: t1, Count: 300},
{Time: t2, Count: 500},
},
DayStart: now.Add(-1 * time.Hour),
DayCount: 42,
},
"model-b": {
Requests: []time.Time{now.Add(-5 * time.Second)},
Tokens: []TokenEntry{
{Time: now.Add(-5 * time.Second), Count: 100},
},
DayStart: now,
DayCount: 1,
},
}
require.NoError(t, store.saveState(state))
loaded, err := store.loadState()
require.NoError(t, err)
assert.Equal(t, len(state), len(loaded), "should load same number of models")
for model, expected := range state {
actual, ok := loaded[model]
require.True(t, ok, "loaded state should contain %s", model)
assert.Len(t, actual.Requests, len(expected.Requests), "request count for %s", model)
assert.Len(t, actual.Tokens, len(expected.Tokens), "token count for %s", model)
assert.Equal(t, expected.DayCount, actual.DayCount, "day count for %s", model)
// Time comparison with nanosecond precision (UnixNano round-trip).
assert.Equal(t, expected.DayStart.UnixNano(), actual.DayStart.UnixNano(), "day start for %s", model)
for i, req := range expected.Requests {
assert.Equal(t, req.UnixNano(), actual.Requests[i].UnixNano(), "request %d for %s", i, model)
}
for i, tok := range expected.Tokens {
assert.Equal(t, tok.Time.UnixNano(), actual.Tokens[i].Time.UnixNano(), "token time %d for %s", i, model)
assert.Equal(t, tok.Count, actual.Tokens[i].Count, "token count %d for %s", i, model)
}
}
}
func TestSQLiteStateOverwrite_Good(t *testing.T) {
dbPath := filepath.Join(t.TempDir(), "overwrite.db")
store, err := newSQLiteStore(dbPath)
require.NoError(t, err)
defer store.close()
now := time.Now()
// Save initial state.
require.NoError(t, store.saveState(map[string]*UsageStats{
"model-a": {
Requests: []time.Time{now, now, now},
DayStart: now,
DayCount: 3,
},
}))
// Save new state (should replace).
require.NoError(t, store.saveState(map[string]*UsageStats{
"model-b": {
Requests: []time.Time{now},
DayStart: now,
DayCount: 1,
},
}))
loaded, err := store.loadState()
require.NoError(t, err)
_, hasA := loaded["model-a"]
assert.False(t, hasA, "model-a should have been deleted on overwrite")
b, hasB := loaded["model-b"]
require.True(t, hasB, "model-b should exist")
assert.Equal(t, 1, b.DayCount)
assert.Len(t, b.Requests, 1)
}
func TestSQLiteEmptyState_Good(t *testing.T) {
dbPath := filepath.Join(t.TempDir(), "empty.db")
store, err := newSQLiteStore(dbPath)
require.NoError(t, err)
defer store.close()
// Load from empty database.
quotas, err := store.loadQuotas()
require.NoError(t, err)
assert.Empty(t, quotas, "should return empty quotas from fresh DB")
state, err := store.loadState()
require.NoError(t, err)
assert.Empty(t, state, "should return empty state from fresh DB")
}
func TestSQLiteClose_Good(t *testing.T) {
dbPath := filepath.Join(t.TempDir(), "close.db")
store, err := newSQLiteStore(dbPath)
require.NoError(t, err)
require.NoError(t, store.close(), "first close should succeed")
}
// --- Phase 2: SQLite integration tests ---
func TestNewWithSQLite_Good(t *testing.T) {
dbPath := filepath.Join(t.TempDir(), "limiter.db")
rl, err := NewWithSQLite(dbPath)
require.NoError(t, err)
defer rl.Close()
// Should have Gemini defaults.
_, hasGemini := rl.Quotas["gemini-3-pro-preview"]
assert.True(t, hasGemini, "should have Gemini defaults")
// SQLite backend should be set.
assert.NotNil(t, rl.sqlite, "SQLite store should be initialised")
}
func TestNewWithSQLiteConfig_Good(t *testing.T) {
dbPath := filepath.Join(t.TempDir(), "config.db")
rl, err := NewWithSQLiteConfig(dbPath, Config{
Providers: []Provider{ProviderAnthropic},
Quotas: map[string]ModelQuota{
"custom-model": {MaxRPM: 10, MaxTPM: 1000, MaxRPD: 50},
},
})
require.NoError(t, err)
defer rl.Close()
_, hasClaude := rl.Quotas["claude-opus-4"]
assert.True(t, hasClaude, "should have Anthropic models")
_, hasCustom := rl.Quotas["custom-model"]
assert.True(t, hasCustom, "should have custom model")
_, hasGemini := rl.Quotas["gemini-3-pro-preview"]
assert.False(t, hasGemini, "should not have Gemini models")
}
func TestSQLitePersistAndLoad_Good(t *testing.T) {
dbPath := filepath.Join(t.TempDir(), "persist.db")
rl, err := NewWithSQLite(dbPath)
require.NoError(t, err)
model := "persist-test"
rl.Quotas[model] = ModelQuota{MaxRPM: 50, MaxTPM: 5000, MaxRPD: 500}
rl.RecordUsage(model, 100, 200)
rl.RecordUsage(model, 50, 50)
require.NoError(t, rl.Persist())
require.NoError(t, rl.Close())
// Reload from same database.
rl2, err := NewWithSQLite(dbPath)
require.NoError(t, err)
defer rl2.Close()
require.NoError(t, rl2.Load())
stats := rl2.Stats(model)
assert.Equal(t, 2, stats.RPM, "should have 2 requests after reload")
assert.Equal(t, 400, stats.TPM, "should have 100+200+50+50=400 tokens after reload")
assert.Equal(t, 2, stats.RPD, "should have 2 daily requests after reload")
assert.Equal(t, 50, stats.MaxRPM, "quota should be persisted")
assert.Equal(t, 5000, stats.MaxTPM)
assert.Equal(t, 500, stats.MaxRPD)
}
func TestSQLitePersistMultipleModels_Good(t *testing.T) {
dbPath := filepath.Join(t.TempDir(), "multi.db")
rl, err := NewWithSQLiteConfig(dbPath, Config{
Providers: []Provider{ProviderGemini, ProviderAnthropic},
})
require.NoError(t, err)
rl.RecordUsage("gemini-3-pro-preview", 500, 500)
rl.RecordUsage("claude-opus-4", 200, 200)
require.NoError(t, rl.Persist())
require.NoError(t, rl.Close())
rl2, err := NewWithSQLiteConfig(dbPath, Config{
Providers: []Provider{ProviderGemini, ProviderAnthropic},
})
require.NoError(t, err)
defer rl2.Close()
require.NoError(t, rl2.Load())
gemini := rl2.Stats("gemini-3-pro-preview")
assert.Equal(t, 1, gemini.RPM)
assert.Equal(t, 1000, gemini.TPM)
claude := rl2.Stats("claude-opus-4")
assert.Equal(t, 1, claude.RPM)
assert.Equal(t, 400, claude.TPM)
}
func TestSQLiteRecordUsageThenPersistReload_Good(t *testing.T) {
dbPath := filepath.Join(t.TempDir(), "record.db")
rl, err := NewWithSQLite(dbPath)
require.NoError(t, err)
model := "test-model"
rl.Quotas[model] = ModelQuota{MaxRPM: 100, MaxTPM: 100000, MaxRPD: 1000}
// Record multiple usages.
for i := 0; i < 10; i++ {
rl.RecordUsage(model, 50, 50)
}
require.NoError(t, rl.Persist())
// Verify CanSend works correctly with persisted state.
stats := rl.Stats(model)
assert.Equal(t, 10, stats.RPM)
assert.Equal(t, 1000, stats.TPM) // 10 * (50+50) = 1000
assert.Equal(t, 10, stats.RPD)
require.NoError(t, rl.Close())
// Reload and verify.
rl2, err := NewWithSQLite(dbPath)
require.NoError(t, err)
defer rl2.Close()
rl2.Quotas[model] = ModelQuota{MaxRPM: 100, MaxTPM: 100000, MaxRPD: 1000}
require.NoError(t, rl2.Load())
assert.True(t, rl2.CanSend(model, 100), "should be able to send after reload")
stats2 := rl2.Stats(model)
assert.Equal(t, 10, stats2.RPM, "RPM should survive reload")
assert.Equal(t, 1000, stats2.TPM, "TPM should survive reload")
}
func TestSQLiteClose_Good_NoOp(t *testing.T) {
// Close on YAML-backed limiter is a no-op.
rl := newTestLimiter(t)
assert.NoError(t, rl.Close(), "Close on YAML limiter should be no-op")
}
// --- Phase 2: Concurrent SQLite ---
func TestSQLiteConcurrent_Good(t *testing.T) {
dbPath := filepath.Join(t.TempDir(), "concurrent.db")
rl, err := NewWithSQLite(dbPath)
require.NoError(t, err)
defer rl.Close()
model := "concurrent-sqlite"
rl.Quotas[model] = ModelQuota{MaxRPM: 100000, MaxTPM: 1000000000, MaxRPD: 100000}
var wg sync.WaitGroup
goroutines := 10
opsPerGoroutine := 20
// Concurrent RecordUsage + CanSend + Persist (no Load, which would
// overwrite in-memory state and lose recordings between cycles).
for i := 0; i < goroutines; i++ {
wg.Add(1)
go func() {
defer wg.Done()
for j := 0; j < opsPerGoroutine; j++ {
rl.RecordUsage(model, 5, 5)
rl.CanSend(model, 10)
_ = rl.Persist()
}
}()
}
wg.Wait()
// All recordings should be counted.
stats := rl.Stats(model)
assert.Equal(t, goroutines*opsPerGoroutine, stats.RPD,
"all recordings should be counted despite concurrent operations")
// Verify the final persisted state survives a reload.
require.NoError(t, rl.Persist())
require.NoError(t, rl.Close())
rl2, err := NewWithSQLite(dbPath)
require.NoError(t, err)
defer rl2.Close()
rl2.Quotas[model] = ModelQuota{MaxRPM: 100000, MaxTPM: 1000000000, MaxRPD: 100000}
require.NoError(t, rl2.Load())
stats2 := rl2.Stats(model)
assert.Equal(t, goroutines*opsPerGoroutine, stats2.RPD,
"all recordings should survive persist+reload")
}
// --- Phase 2: YAML backward compatibility ---
func TestYAMLBackwardCompat_Good(t *testing.T) {
// Verify that the default YAML backend still works after SQLite additions.
tmpDir := t.TempDir()
path := filepath.Join(tmpDir, "compat.yaml")
rl1, err := New()
require.NoError(t, err)
rl1.filePath = path
model := "compat-test"
rl1.Quotas[model] = ModelQuota{MaxRPM: 50, MaxTPM: 5000, MaxRPD: 500}
rl1.RecordUsage(model, 100, 100)
require.NoError(t, rl1.Persist())
require.NoError(t, rl1.Close()) // No-op for YAML
// Reload.
rl2, err := New()
require.NoError(t, err)
rl2.filePath = path
require.NoError(t, rl2.Load())
stats := rl2.Stats(model)
assert.Equal(t, 1, stats.RPM)
assert.Equal(t, 200, stats.TPM)
}
func TestConfigBackendDefault_Good(t *testing.T) {
// Empty Backend string should default to YAML behaviour.
rl, err := NewWithConfig(Config{
FilePath: filepath.Join(t.TempDir(), "default.yaml"),
})
require.NoError(t, err)
assert.Nil(t, rl.sqlite, "empty backend should use YAML (no sqlite)")
}
// --- Phase 2: MigrateYAMLToSQLite ---
func TestMigrateYAMLToSQLite_Good(t *testing.T) {
tmpDir := t.TempDir()
yamlPath := filepath.Join(tmpDir, "state.yaml")
sqlitePath := filepath.Join(tmpDir, "migrated.db")
// Create a YAML-backed limiter with state.
rl, err := New()
require.NoError(t, err)
rl.filePath = yamlPath
model := "migrate-test"
rl.Quotas[model] = ModelQuota{MaxRPM: 42, MaxTPM: 9999, MaxRPD: 100}
rl.RecordUsage(model, 200, 300)
rl.RecordUsage(model, 100, 100)
require.NoError(t, rl.Persist())
// Migrate.
require.NoError(t, MigrateYAMLToSQLite(yamlPath, sqlitePath))
// Verify by loading from SQLite.
rl2, err := NewWithSQLite(sqlitePath)
require.NoError(t, err)
defer rl2.Close()
require.NoError(t, rl2.Load())
q, ok := rl2.Quotas[model]
require.True(t, ok, "migrated quota should exist")
assert.Equal(t, 42, q.MaxRPM)
assert.Equal(t, 9999, q.MaxTPM)
assert.Equal(t, 100, q.MaxRPD)
stats := rl2.Stats(model)
assert.Equal(t, 2, stats.RPM, "should have 2 requests after migration")
assert.Equal(t, 700, stats.TPM, "should have 200+300+100+100=700 tokens")
assert.Equal(t, 2, stats.RPD, "should have 2 daily requests")
}
func TestMigrateYAMLToSQLite_Bad(t *testing.T) {
t.Run("non-existent YAML file", func(t *testing.T) {
err := MigrateYAMLToSQLite("/nonexistent/state.yaml", filepath.Join(t.TempDir(), "out.db"))
assert.Error(t, err, "should fail with non-existent YAML file")
})
t.Run("corrupt YAML file", func(t *testing.T) {
tmpDir := t.TempDir()
yamlPath := filepath.Join(tmpDir, "corrupt.yaml")
require.NoError(t, os.WriteFile(yamlPath, []byte("{{{{not yaml!"), 0644))
err := MigrateYAMLToSQLite(yamlPath, filepath.Join(tmpDir, "out.db"))
assert.Error(t, err, "should fail with corrupt YAML")
})
}
func TestMigrateYAMLToSQLitePreservesAllGeminiModels_Good(t *testing.T) {
tmpDir := t.TempDir()
yamlPath := filepath.Join(tmpDir, "full.yaml")
sqlitePath := filepath.Join(tmpDir, "full.db")
// Create a full YAML state with all Gemini models.
rl, err := New()
require.NoError(t, err)
rl.filePath = yamlPath
for model := range rl.Quotas {
rl.RecordUsage(model, 10, 10)
}
require.NoError(t, rl.Persist())
require.NoError(t, MigrateYAMLToSQLite(yamlPath, sqlitePath))
rl2, err := NewWithSQLite(sqlitePath)
require.NoError(t, err)
defer rl2.Close()
require.NoError(t, rl2.Load())
for model := range rl.Quotas {
q, ok := rl2.Quotas[model]
require.True(t, ok, "migrated quota should exist for %s", model)
assert.Equal(t, rl.Quotas[model], q, "quota values should match for %s", model)
}
}
// --- Phase 2: Corrupt DB recovery ---
func TestSQLiteCorruptDB_Ugly(t *testing.T) {
tmpDir := t.TempDir()
dbPath := filepath.Join(tmpDir, "corrupt.db")
// Write garbage to the DB file.
require.NoError(t, os.WriteFile(dbPath, []byte("THIS IS NOT A SQLITE DATABASE"), 0644))
// Opening a corrupt DB may succeed (sqlite is lazy about validation),
// but operations on it should fail gracefully.
store, err := newSQLiteStore(dbPath)
if err != nil {
// If open itself fails, that's acceptable recovery.
assert.Contains(t, err.Error(), "ratelimit")
return
}
defer store.close()
// Try to load quotas -- should fail gracefully.
_, err = store.loadQuotas()
assert.Error(t, err, "loading from corrupt DB should return an error")
}
func TestSQLiteTruncatedDB_Ugly(t *testing.T) {
tmpDir := t.TempDir()
dbPath := filepath.Join(tmpDir, "truncated.db")
// Create a valid DB first.
store, err := newSQLiteStore(dbPath)
require.NoError(t, err)
require.NoError(t, store.saveQuotas(map[string]ModelQuota{
"test": {MaxRPM: 1},
}))
require.NoError(t, store.close())
// Truncate the file to simulate corruption.
f, err := os.OpenFile(dbPath, os.O_WRONLY|os.O_TRUNC, 0644)
require.NoError(t, err)
_, err = f.Write([]byte("TRUNC"))
require.NoError(t, err)
require.NoError(t, f.Close())
// Opening should either fail or operations should fail.
store2, err := newSQLiteStore(dbPath)
if err != nil {
assert.Contains(t, err.Error(), "ratelimit")
return
}
defer store2.close()
_, err = store2.loadQuotas()
assert.Error(t, err, "loading from truncated DB should return an error")
}
func TestSQLiteEmptyModelState_Good(t *testing.T) {
// State with no requests or tokens but with a daily counter.
dbPath := filepath.Join(t.TempDir(), "empty-state.db")
store, err := newSQLiteStore(dbPath)
require.NoError(t, err)
defer store.close()
now := time.Now()
state := map[string]*UsageStats{
"empty-model": {
DayStart: now,
DayCount: 5,
},
}
require.NoError(t, store.saveState(state))
loaded, err := store.loadState()
require.NoError(t, err)
s, ok := loaded["empty-model"]
require.True(t, ok)
assert.Equal(t, 5, s.DayCount)
assert.Empty(t, s.Requests, "should have no requests")
assert.Empty(t, s.Tokens, "should have no tokens")
}
// --- Phase 2: End-to-end with persist cycle ---
func TestSQLiteEndToEnd_Good(t *testing.T) {
dbPath := filepath.Join(t.TempDir(), "e2e.db")
// Session 1: Create limiter, record usage, persist.
rl1, err := NewWithSQLiteConfig(dbPath, Config{
Providers: []Provider{ProviderGemini, ProviderOpenAI},
})
require.NoError(t, err)
rl1.RecordUsage("gemini-3-pro-preview", 1000, 500)
rl1.RecordUsage("gpt-4o", 200, 200)
rl1.SetQuota("custom-local", ModelQuota{MaxRPM: 5, MaxTPM: 10000, MaxRPD: 50})
rl1.RecordUsage("custom-local", 100, 100)
require.NoError(t, rl1.Persist())
require.NoError(t, rl1.Close())
// Session 2: Reload and verify all state.
rl2, err := NewWithSQLiteConfig(dbPath, Config{
Providers: []Provider{ProviderGemini, ProviderOpenAI},
})
require.NoError(t, err)
defer rl2.Close()
require.NoError(t, rl2.Load())
// Gemini state.
gemini := rl2.Stats("gemini-3-pro-preview")
assert.Equal(t, 1, gemini.RPM)
assert.Equal(t, 1500, gemini.TPM)
assert.Equal(t, 150, gemini.MaxRPM)
// OpenAI state.
gpt := rl2.Stats("gpt-4o")
assert.Equal(t, 1, gpt.RPM)
assert.Equal(t, 400, gpt.TPM)
// Custom model state.
custom := rl2.Stats("custom-local")
assert.Equal(t, 1, custom.RPM)
assert.Equal(t, 200, custom.TPM)
assert.Equal(t, 5, custom.MaxRPM)
}
// --- Phase 2: Benchmark ---
func BenchmarkSQLitePersist(b *testing.B) {
dbPath := filepath.Join(b.TempDir(), "bench.db")
rl, err := NewWithSQLite(dbPath)
if err != nil {
b.Fatal(err)
}
defer rl.Close()
model := "bench-sqlite"
rl.Quotas[model] = ModelQuota{MaxRPM: 1000, MaxTPM: 100000, MaxRPD: 10000}
now := time.Now()
rl.State[model] = &UsageStats{DayStart: now, DayCount: 100}
for i := 0; i < 100; i++ {
t := now.Add(-time.Duration(i) * time.Second)
rl.State[model].Requests = append(rl.State[model].Requests, t)
rl.State[model].Tokens = append(rl.State[model].Tokens, TokenEntry{Time: t, Count: 100})
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
_ = rl.Persist()
}
}
func BenchmarkSQLiteLoad(b *testing.B) {
dbPath := filepath.Join(b.TempDir(), "bench-load.db")
rl, err := NewWithSQLite(dbPath)
if err != nil {
b.Fatal(err)
}
defer rl.Close()
model := "bench-sqlite-load"
rl.Quotas[model] = ModelQuota{MaxRPM: 1000, MaxTPM: 100000, MaxRPD: 10000}
now := time.Now()
rl.State[model] = &UsageStats{DayStart: now, DayCount: 100}
for i := 0; i < 100; i++ {
t := now.Add(-time.Duration(i) * time.Second)
rl.State[model].Requests = append(rl.State[model].Requests, t)
rl.State[model].Tokens = append(rl.State[model].Tokens, TokenEntry{Time: t, Count: 100})
}
_ = rl.Persist()
b.ResetTimer()
for i := 0; i < b.N; i++ {
_ = rl.Load()
}
}
// --- Phase 2: Verify YAML tests still pass (this is tested implicitly) ---
// All existing tests in ratelimit_test.go use YAML backend by default.
// The fact that they still pass proves backward compatibility.
// TestMigrateYAMLToSQLiteWithFullState tests migration of a realistic YAML
// file that contains the full serialised RateLimiter struct.
func TestMigrateYAMLToSQLiteWithFullState_Good(t *testing.T) {
tmpDir := t.TempDir()
yamlPath := filepath.Join(tmpDir, "realistic.yaml")
sqlitePath := filepath.Join(tmpDir, "realistic.db")
now := time.Now()
// Create a realistic YAML file by serialising a RateLimiter.
rl := &RateLimiter{
Quotas: map[string]ModelQuota{
"gemini-3-pro-preview": {MaxRPM: 150, MaxTPM: 1000000, MaxRPD: 1000},
"claude-opus-4": {MaxRPM: 50, MaxTPM: 40000, MaxRPD: 0},
},
State: map[string]*UsageStats{
"gemini-3-pro-preview": {
Requests: []time.Time{now, now.Add(-10 * time.Second)},
Tokens: []TokenEntry{
{Time: now, Count: 500},
{Time: now.Add(-10 * time.Second), Count: 300},
},
DayStart: now.Add(-2 * time.Hour),
DayCount: 25,
},
"claude-opus-4": {
Requests: []time.Time{now.Add(-5 * time.Second)},
Tokens: []TokenEntry{
{Time: now.Add(-5 * time.Second), Count: 1000},
},
DayStart: now.Add(-30 * time.Minute),
DayCount: 3,
},
},
}
data, err := yaml.Marshal(rl)
require.NoError(t, err)
require.NoError(t, os.WriteFile(yamlPath, data, 0644))
// Migrate.
require.NoError(t, MigrateYAMLToSQLite(yamlPath, sqlitePath))
// Verify.
rl2, err := NewWithSQLiteConfig(sqlitePath, Config{})
require.NoError(t, err)
defer rl2.Close()
require.NoError(t, rl2.Load())
gemini := rl2.Stats("gemini-3-pro-preview")
assert.Equal(t, 2, gemini.RPM)
assert.Equal(t, 800, gemini.TPM) // 500 + 300
assert.Equal(t, 25, gemini.RPD)
assert.Equal(t, 150, gemini.MaxRPM)
claude := rl2.Stats("claude-opus-4")
assert.Equal(t, 1, claude.RPM)
assert.Equal(t, 1000, claude.TPM)
assert.Equal(t, 3, claude.RPD)
assert.Equal(t, 50, claude.MaxRPM)
}