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types.go
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227 lines (188 loc) · 4.91 KB
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package redkit
import (
"context"
"crypto/tls"
"log"
"net"
"sync"
"sync/atomic"
"time"
)
type LogLevel int
const (
LogLevelDebug LogLevel = iota
LogLevelInfo
LogLevelWarn
LogLevelError
LogLevelOff
)
type Logger interface {
Debug(format string, v ...interface{})
Info(format string, v ...interface{})
Warn(format string, v ...interface{})
Error(format string, v ...interface{})
}
type defaultLogger struct {
logger *log.Logger
level LogLevel
}
func NewDefaultLogger(logger *log.Logger, level LogLevel) Logger {
if logger == nil {
logger = log.New(log.Writer(), "[RedKit] ", log.LstdFlags)
}
return &defaultLogger{logger: logger, level: level}
}
func (l *defaultLogger) Debug(format string, v ...interface{}) {
if l.level <= LogLevelDebug {
l.logger.Printf("[DEBUG] "+format, v...)
}
}
func (l *defaultLogger) Info(format string, v ...interface{}) {
if l.level <= LogLevelInfo {
l.logger.Printf("[INFO] "+format, v...)
}
}
func (l *defaultLogger) Warn(format string, v ...interface{}) {
if l.level <= LogLevelWarn {
l.logger.Printf("[WARN] "+format, v...)
}
}
func (l *defaultLogger) Error(format string, v ...interface{}) {
if l.level <= LogLevelError {
l.logger.Printf("[ERROR] "+format, v...)
}
}
type CommandHandler interface {
Handle(conn *Connection, cmd *Command) RedisValue
}
type CommandHandlerFunc func(conn *Connection, cmd *Command) RedisValue
func (f CommandHandlerFunc) Handle(conn *Connection, cmd *Command) RedisValue {
return f(conn, cmd)
}
type Middleware interface {
Handle(conn *Connection, cmd *Command, next CommandHandler) RedisValue
}
type MiddlewareFunc func(conn *Connection, cmd *Command, next CommandHandler) RedisValue
func (f MiddlewareFunc) Handle(conn *Connection, cmd *Command, next CommandHandler) RedisValue {
return f(conn, cmd, next)
}
type MiddlewareChain struct {
middlewares atomic.Value // []Middleware
mu sync.Mutex
}
func NewMiddlewareChain() *MiddlewareChain {
mc := &MiddlewareChain{}
mc.middlewares.Store([]Middleware{})
return mc
}
func (mc *MiddlewareChain) Add(middleware Middleware) *MiddlewareChain {
mc.mu.Lock()
defer mc.mu.Unlock()
current := mc.middlewares.Load().([]Middleware)
newMiddlewares := make([]Middleware, len(current)+1)
copy(newMiddlewares, current)
newMiddlewares[len(current)] = middleware
mc.middlewares.Store(newMiddlewares)
return mc
}
func (mc *MiddlewareChain) Execute(conn *Connection, cmd *Command, handler CommandHandler) RedisValue {
middlewares := mc.middlewares.Load().([]Middleware)
if len(middlewares) == 0 {
return handler.Handle(conn, cmd)
}
final := handler
for i := len(middlewares) - 1; i >= 0; i-- {
mw := middlewares[i]
next := final
final = &wrappedHandler{
middleware: mw,
next: next,
}
}
return final.Handle(conn, cmd)
}
type wrappedHandler struct {
middleware Middleware
next CommandHandler
}
func (wh *wrappedHandler) Handle(conn *Connection, cmd *Command) RedisValue {
return wh.middleware.Handle(conn, cmd, wh.next)
}
func (mc *MiddlewareChain) Handler(handler CommandHandler) CommandHandler {
return CommandHandlerFunc(func(conn *Connection, cmd *Command) RedisValue {
return mc.Execute(conn, cmd, handler)
})
}
type ConnState int
const (
StateNew ConnState = iota
StateActive
StateIdle
StateClosed
StateProcessing
)
type RedisValue struct {
Type RedisType
Str string
Int int64
Bulk []byte
Array []RedisValue
}
type RedisType int
const (
SimpleString RedisType = iota
ErrorReply
Integer
BulkString
Array
Null
)
type Command struct {
Name string
Args []string
Raw []RedisValue
}
type ServerConfig struct {
Address string
TLSConfig *tls.Config
ReadTimeout time.Duration
WriteTimeout time.Duration
IdleTimeout time.Duration
IdleCheckFrequency time.Duration
MaxConnections int
Logger Logger
ConnStateHook func(net.Conn, ConnState)
}
func DefaultServerConfig() *ServerConfig {
return &ServerConfig{
Address: ":6379",
ReadTimeout: 30 * time.Second,
WriteTimeout: 30 * time.Second,
IdleTimeout: 120 * time.Second,
IdleCheckFrequency: 30 * time.Second,
MaxConnections: 1000,
Logger: NewDefaultLogger(nil, LogLevelInfo),
}
}
type Server struct {
Address string
TLSConfig *tls.Config
ReadTimeout time.Duration
WriteTimeout time.Duration
IdleTimeout time.Duration
IdleCheckFrequency time.Duration
MaxConnections int
Logger Logger
ConnStateHook func(net.Conn, ConnState)
handlers *sync.Map // map[string]CommandHandler
middlewareChain *MiddlewareChain
listener net.Listener
activeConns *sync.Map // map[*Connection]struct{}
connCount atomic.Int64
inShutdown atomic.Bool
mu sync.RWMutex
onShutdown []func()
ctx context.Context
cancel context.CancelFunc
wg sync.WaitGroup
}