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