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forgejo/modules/nosql/manager.go
Gusted 9df10c5ac5
[FEAT] Only implement used API of Redis client
- Currently for the `nosql` module (which simply said provides a manager
for redis clients) returns the
[`redis.UniversalClient`](https://pkg.go.dev/github.com/redis/go-redis/v9#UniversalClient)
interface. The interfaces exposes all available commands.
- In generalm, dead code elimination should be able to take care of not
generating the machine code for methods that aren't being used. However
in this specific case, dead code elimination either is disabled or gives
up on trying because of exhaustive call stack the client by
`GetRedisClient` is used.
- Help the Go compiler by explicitly specifying which methods we use.
This reduces the binary size by ~400KB (397312 bytes). As Go no longer
generate machine code for commands that aren't being used.
- There's a **CAVEAT** with this, if a developer wants to use a new
method that isn't specified, they will have to know about this
hack (by following the definition of existing Redis methods) and add the
method definition from the Redis library to the `RedisClient` interface.
2024-08-30 04:33:15 +02:00

116 lines
3.1 KiB
Go

// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package nosql
import (
"context"
"strconv"
"sync"
"time"
"code.gitea.io/gitea/modules/process"
"github.com/redis/go-redis/v9"
"github.com/syndtr/goleveldb/leveldb"
)
var manager *Manager
// Manager is the nosql connection manager
type Manager struct {
ctx context.Context
finished context.CancelFunc
mutex sync.Mutex
RedisConnections map[string]*redisClientHolder
LevelDBConnections map[string]*levelDBHolder
}
// RedisClient is a subset of redis.UniversalClient, it exposes less methods
// to avoid generating machine code for unused methods. New method definitions
// should be copied from the definitions in the Redis library github.com/redis/go-redis.
type RedisClient interface {
// redis.GenericCmdable
Del(ctx context.Context, keys ...string) *redis.IntCmd
Exists(ctx context.Context, keys ...string) *redis.IntCmd
// redis.ListCmdable
RPush(ctx context.Context, key string, values ...any) *redis.IntCmd
LPop(ctx context.Context, key string) *redis.StringCmd
LLen(ctx context.Context, key string) *redis.IntCmd
// redis.StringCmdable
Decr(ctx context.Context, key string) *redis.IntCmd
Incr(ctx context.Context, key string) *redis.IntCmd
Set(ctx context.Context, key string, value any, expiration time.Duration) *redis.StatusCmd
Get(ctx context.Context, key string) *redis.StringCmd
// redis.HashCmdable
HSet(ctx context.Context, key string, values ...any) *redis.IntCmd
HDel(ctx context.Context, key string, fields ...string) *redis.IntCmd
HKeys(ctx context.Context, key string) *redis.StringSliceCmd
// redis.SetCmdable
SAdd(ctx context.Context, key string, members ...any) *redis.IntCmd
SRem(ctx context.Context, key string, members ...any) *redis.IntCmd
SIsMember(ctx context.Context, key string, member any) *redis.BoolCmd
// redis.Cmdable
DBSize(ctx context.Context) *redis.IntCmd
FlushDB(ctx context.Context) *redis.StatusCmd
Ping(ctx context.Context) *redis.StatusCmd
// redis.UniversalClient
Close() error
}
type redisClientHolder struct {
RedisClient
name []string
count int64
}
func (r *redisClientHolder) Close() error {
return manager.CloseRedisClient(r.name[0])
}
type levelDBHolder struct {
name []string
count int64
db *leveldb.DB
}
func init() {
_ = GetManager()
}
// GetManager returns a Manager and initializes one as singleton is there's none yet
func GetManager() *Manager {
if manager == nil {
ctx, _, finished := process.GetManager().AddTypedContext(context.Background(), "Service: NoSQL", process.SystemProcessType, false)
manager = &Manager{
ctx: ctx,
finished: finished,
RedisConnections: make(map[string]*redisClientHolder),
LevelDBConnections: make(map[string]*levelDBHolder),
}
}
return manager
}
func valToTimeDuration(vs []string) (result time.Duration) {
var err error
for _, v := range vs {
result, err = time.ParseDuration(v)
if err != nil {
var val int
val, err = strconv.Atoi(v)
result = time.Duration(val)
}
if err == nil {
return result
}
}
return result
}