增加任意数据类型之间的转换 && 使用锁实现并发安全的普通map

.gitignore

@@ -0,0 +1,20 @@
+# Created by .ignore support plugin (hsz.mobi)
+### Go template
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+.idea
+.vscode
+

convert/convert.go

@@ -0,0 +1,393 @@
+// Package convert ...
+//
+// Description : 任意类型之间的相互转换
+//
+// Author : go_developer@163.com<张德满>
+//
+// Date : 2021-02-23 10:23 下午
+package convert
+
+/*
+   Desc : 在处理一些参数的时候，可能需要将参数转换为各种类型，这里实现一个通用的转换函数，实现各种类型之间的相互转换。
+
+    当然，如果源数据格式和目标数据类型不一致，是会返回错误的。例如将字符串“一二三”转换为数值类型则会报错，而将字符串“123”转换为数值类型则OK。
+
+    这段代码实际抄自go自带的“database/sql”库，只是源代码作为内部函数无法在外面调用，可以单独把需要的功能拎出来使用：
+
+    代码中有一个Scaner接口，可以自行实现，然后通过"convertAssign()"函数，作为dst参数传入。
+
+   Author : zhangdeman001@ke.com<张德满>
+
+*/
+import (
+	"errors"
+	"fmt"
+	"reflect"
+	"strconv"
+	"time"
+)
+
+// RawBytes is a byte slice that holds a reference to memory owned by
+// the database itself. After a Scan into a RawBytes, the slice is only
+// valid until the next call to Next, Scan, or Close.
+type RawBytes []byte
+
+var errNilPtr = errors.New("destination pointer is nil") // embedded in descriptive error
+
+// convertAssign copies to dest the value in src, converting it if possible.
+// An error is returned if the copy would result in loss of information.
+// dest should be a pointer type.
+func ConvertAssign(dest, src interface{}) error {
+	// Common cases, without reflect.
+	switch s := src.(type) {
+	case string:
+		switch d := dest.(type) {
+		case *string:
+			if d == nil {
+				return errNilPtr
+			}
+			*d = s
+			return nil
+		case *[]byte:
+			if d == nil {
+				return errNilPtr
+			}
+			*d = []byte(s)
+			return nil
+		case *RawBytes:
+			if d == nil {
+				return errNilPtr
+			}
+			*d = append((*d)[:0], s...)
+			return nil
+		}
+	case []byte:
+		switch d := dest.(type) {
+		case *string:
+			if d == nil {
+				return errNilPtr
+			}
+			*d = string(s)
+			return nil
+		case *interface{}:
+			if d == nil {
+				return errNilPtr
+			}
+			*d = cloneBytes(s)
+			return nil
+		case *[]byte:
+			if d == nil {
+				return errNilPtr
+			}
+			*d = cloneBytes(s)
+			return nil
+		case *RawBytes:
+			if d == nil {
+				return errNilPtr
+			}
+			*d = s
+			return nil
+		}
+	case time.Time:
+		switch d := dest.(type) {
+		case *time.Time:
+			*d = s
+			return nil
+		case *string:
+			*d = s.Format(time.RFC3339Nano)
+			return nil
+		case *[]byte:
+			if d == nil {
+				return errNilPtr
+			}
+			*d = []byte(s.Format(time.RFC3339Nano))
+			return nil
+		case *RawBytes:
+			if d == nil {
+				return errNilPtr
+			}
+			*d = s.AppendFormat((*d)[:0], time.RFC3339Nano)
+			return nil
+		}
+	case nil:
+		switch d := dest.(type) {
+		case *interface{}:
+			if d == nil {
+				return errNilPtr
+			}
+			*d = nil
+			return nil
+		case *[]byte:
+			if d == nil {
+				return errNilPtr
+			}
+			*d = nil
+			return nil
+		case *RawBytes:
+			if d == nil {
+				return errNilPtr
+			}
+			*d = nil
+			return nil
+		}
+	}
+
+	var sv reflect.Value
+
+	switch d := dest.(type) {
+	case *string:
+		sv = reflect.ValueOf(src)
+		switch sv.Kind() {
+		case reflect.Bool,
+			reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
+			reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
+			reflect.Float32, reflect.Float64:
+			*d = asString(src)
+			return nil
+		}
+	case *[]byte:
+		sv = reflect.ValueOf(src)
+		if b, ok := asBytes(nil, sv); ok {
+			*d = b
+			return nil
+		}
+	case *RawBytes:
+		sv = reflect.ValueOf(src)
+		if b, ok := asBytes([]byte(*d)[:0], sv); ok {
+			*d = RawBytes(b)
+			return nil
+		}
+	case *bool:
+		bv, err := Bool.ConvertValue(src)
+		if err == nil {
+			*d = bv.(bool)
+		}
+		return err
+	case *interface{}:
+		*d = src
+		return nil
+	}
+
+	if scanner, ok := dest.(Scanner); ok {
+		return scanner.Scan(src)
+	}
+
+	dpv := reflect.ValueOf(dest)
+	if dpv.Kind() != reflect.Ptr {
+		return errors.New("destination not a pointer")
+	}
+	if dpv.IsNil() {
+		return errNilPtr
+	}
+
+	if !sv.IsValid() {
+		sv = reflect.ValueOf(src)
+	}
+
+	dv := reflect.Indirect(dpv)
+	if sv.IsValid() && sv.Type().AssignableTo(dv.Type()) {
+		switch b := src.(type) {
+		case []byte:
+			dv.Set(reflect.ValueOf(cloneBytes(b)))
+		default:
+			dv.Set(sv)
+		}
+		return nil
+	}
+
+	if dv.Kind() == sv.Kind() && sv.Type().ConvertibleTo(dv.Type()) {
+		dv.Set(sv.Convert(dv.Type()))
+		return nil
+	}
+
+	// The following conversions use a string value as an intermediate representation
+	// to convert between various numeric types.
+	//
+	// This also allows scanning into user defined types such as "type Int int64".
+	// For symmetry, also check for string destination types.
+	switch dv.Kind() {
+	case reflect.Ptr:
+		if src == nil {
+			dv.Set(reflect.Zero(dv.Type()))
+			return nil
+		}
+		dv.Set(reflect.New(dv.Type().Elem()))
+		return ConvertAssign(dv.Interface(), src)
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		s := asString(src)
+		i64, err := strconv.ParseInt(s, 10, dv.Type().Bits())
+		if err != nil {
+			err = strconvErr(err)
+			return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", src, s, dv.Kind(), err)
+		}
+		dv.SetInt(i64)
+		return nil
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		s := asString(src)
+		u64, err := strconv.ParseUint(s, 10, dv.Type().Bits())
+		if err != nil {
+			err = strconvErr(err)
+			return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", src, s, dv.Kind(), err)
+		}
+		dv.SetUint(u64)
+		return nil
+	case reflect.Float32, reflect.Float64:
+		s := asString(src)
+		f64, err := strconv.ParseFloat(s, dv.Type().Bits())
+		if err != nil {
+			err = strconvErr(err)
+			return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", src, s, dv.Kind(), err)
+		}
+		dv.SetFloat(f64)
+		return nil
+	case reflect.String:
+		switch v := src.(type) {
+		case string:
+			dv.SetString(v)
+			return nil
+		case []byte:
+			dv.SetString(string(v))
+			return nil
+		}
+	}
+
+	return fmt.Errorf("unsupported Scan, storing driver.Value type %T into type %T", src, dest)
+}
+
+func strconvErr(err error) error {
+	if ne, ok := err.(*strconv.NumError); ok {
+		return ne.Err
+	}
+	return err
+}
+
+func cloneBytes(b []byte) []byte {
+	if b == nil {
+		return nil
+	}
+	c := make([]byte, len(b))
+	copy(c, b)
+	return c
+}
+
+func ToString(src interface{}) string {
+	return asString(src)
+}
+
+func asString(src interface{}) string {
+	switch v := src.(type) {
+	case string:
+		return v
+	case []byte:
+		return string(v)
+	}
+	rv := reflect.ValueOf(src)
+	switch rv.Kind() {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return strconv.FormatInt(rv.Int(), 10)
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		return strconv.FormatUint(rv.Uint(), 10)
+	case reflect.Float64:
+		return strconv.FormatFloat(rv.Float(), 'g', -1, 64)
+	case reflect.Float32:
+		return strconv.FormatFloat(rv.Float(), 'g', -1, 32)
+	case reflect.Bool:
+		return strconv.FormatBool(rv.Bool())
+	}
+	return fmt.Sprintf("%v", src)
+}
+
+func asBytes(buf []byte, rv reflect.Value) (b []byte, ok bool) {
+	switch rv.Kind() {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return strconv.AppendInt(buf, rv.Int(), 10), true
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		return strconv.AppendUint(buf, rv.Uint(), 10), true
+	case reflect.Float32:
+		return strconv.AppendFloat(buf, rv.Float(), 'g', -1, 32), true
+	case reflect.Float64:
+		return strconv.AppendFloat(buf, rv.Float(), 'g', -1, 64), true
+	case reflect.Bool:
+		return strconv.AppendBool(buf, rv.Bool()), true
+	case reflect.String:
+		s := rv.String()
+		return append(buf, s...), true
+	}
+	return
+}
+
+// Value is a value that drivers must be able to handle.
+// It is either nil, a type handled by a database driver's NamedValueChecker
+// interface, or an instance of one of these types:
+//
+//   int64
+//   float64
+//   bool
+//   []byte
+//   string
+//   time.Time
+type Value interface{}
+
+type boolType struct{}
+
+var Bool boolType
+
+func (boolType) String() string { return "Bool" }
+func (boolType) ConvertValue(src interface{}) (Value, error) {
+	switch s := src.(type) {
+	case bool:
+		return s, nil
+	case string:
+		b, err := strconv.ParseBool(s)
+		if err != nil {
+			return nil, fmt.Errorf("sql/driver: couldn't convert %q into type bool", s)
+		}
+		return b, nil
+	case []byte:
+		b, err := strconv.ParseBool(string(s))
+		if err != nil {
+			return nil, fmt.Errorf("sql/driver: couldn't convert %q into type bool", s)
+		}
+		return b, nil
+	}
+
+	sv := reflect.ValueOf(src)
+	switch sv.Kind() {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		iv := sv.Int()
+		if iv == 1 || iv == 0 {
+			return iv == 1, nil
+		}
+		return nil, fmt.Errorf("sql/driver: couldn't convert %d into type bool", iv)
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		uv := sv.Uint()
+		if uv == 1 || uv == 0 {
+			return uv == 1, nil
+		}
+		return nil, fmt.Errorf("sql/driver: couldn't convert %d into type bool", uv)
+	}
+
+	return nil, fmt.Errorf("sql/driver: couldn't convert %v (%T) into type bool", src, src)
+}
+
+type Scanner interface {
+	// Scan assigns a value from a database driver.
+	//
+	// The src value will be of one of the following types:
+	//
+	//    int64
+	//    float64
+	//    bool
+	//    []byte
+	//    string
+	//    time.Time
+	//    nil - for NULL values
+	//
+	// An error should be returned if the value cannot be stored
+	// without loss of information.
+	//
+	// Reference types such as []byte are only valid until the next call to Scan
+	// and should not be retained. Their underlying memory is owned by the driver.
+	// If retention is necessary, copy their values before the next call to Scan.
+	Scan(src interface{}) error
+}

easymap/abstruct.go

@@ -0,0 +1,36 @@
+// Package easymap...
+//
+// Description : easymap...
+//
+// Author : go_developer@163.com<张德满>
+//
+// Date : 2021-02-23 9:55 下午
+package easymap
+
+// EasyMap 约束各种数据接口的实现
+//
+// Author : go_developer@163.com<张德满>
+//
+// Date : 9:56 下午 2021/2/23
+type EasyMap interface {
+	Get(key interface{}) (interface{}, error)
+	GetWithReceiver(key interface{}, dest interface{}) error
+	GetUint(key interface{}) (uint, error)
+	GetUint8(key interface{}) (uint8, error)
+	GetUint16(key interface{}) (uint16, error)
+	GetUint32(key interface{}) (uint32, error)
+	GetUint64(key interface{}) (uint64, error)
+	GetInt(key interface{}) (int, error)
+	GetInt8(key interface{}) (int8, error)
+	GetInt16(key interface{}) (int16, error)
+	GetInt32(key interface{}) (int32, error)
+	GetInt64(key interface{}) (int64, error)
+	GetFloat32(key interface{}) (float32, error)
+	GetFloat64(key interface{}) (float64, error)
+	GetBool(key interface{}) (bool, error)
+	GetString(key interface{}) (string, error)
+	Set(key interface{}, value interface{})
+	Del(key interface{})
+	Exist(key interface{}) bool
+	GetAll() map[interface{}]interface{}
+}

easymap/error.go

@@ -0,0 +1,28 @@
+// Package easymap...
+//
+// Description : easymap...
+//
+// Author : go_developer@163.com<张德满>
+//
+// Date : 2021-02-23 10:15 下午
+package easymap
+
+import "github.com/pkg/errors"
+
+// keyNotFound key 不存在
+//
+// Author : go_developer@163.com<张德满>
+//
+// Date : 10:17 下午 2021/2/23
+func keyNotFound(key interface{}) error {
+	return errors.Errorf("%v 未找到", key)
+}
+
+// convertFail 数据类型妆换失败
+//
+// Author : go_developer@163.com<张德满>
+//
+// Date : 10:28 下午 2021/2/23
+func convertFail(err error) error {
+	return errors.Wrapf(err, "数据类型转换失败")
+}

easymap/normal_map.go

@@ -0,0 +1,273 @@
+// Package easymap ...
+//
+// Description : 普通的的map,增加锁支持
+//
+// Author : go_developer@163.com<张德满>
+//
+// Date : 2021-02-23 10:03 下午
+package easymap
+
+import (
+	"sync"
+
+	"github.com/go-developer/gopkg/convert"
+)
+
+// NewNormal 获取map实例
+//
+// Author : go_developer@163.com<张德满>
+//
+// Date : 10:07 下午 2021/2/23
+func NewNormal(withLock bool) EasyMap {
+	em := &normal{
+		data:     make(map[interface{}]interface{}),
+		withLock: withLock,
+	}
+	if withLock {
+		em.lock = &sync.RWMutex{}
+	}
+	return em
+}
+
+// normal 普通map,内部可以加锁
+//
+// Author : go_developer@163.com<张德满>
+//
+// Date : 10:03 下午 2021/2/23
+type normal struct {
+	data     map[interface{}]interface{}
+	withLock bool
+	lock     *sync.RWMutex
+}
+
+func (n *normal) Get(key interface{}) (interface{}, error) {
+	if !n.Exist(key) {
+		return nil, keyNotFound(key)
+	}
+	n.RLock()
+	defer n.RUnlock()
+	return n.data[key], nil
+}
+
+func (n *normal) GetWithReceiver(key interface{}, dest interface{}) error {
+	var (
+		val interface{}
+		err error
+	)
+	if val, err = n.Get(key); nil != err {
+		return err
+	}
+	return convertFail(convert.ConvertAssign(dest, val))
+}
+
+func (n *normal) GetUint(key interface{}) (uint, error) {
+	var (
+		result uint
+		err    error
+	)
+	if err = n.GetWithReceiver(key, &result); nil != err {
+		return 0, err
+	}
+	return result, nil
+}
+
+func (n *normal) GetUint8(key interface{}) (uint8, error) {
+	var (
+		result uint8
+		err    error
+	)
+	if err = n.GetWithReceiver(key, &result); nil != err {
+		return 0, err
+	}
+	return result, nil
+}
+
+func (n *normal) GetUint16(key interface{}) (uint16, error) {
+	var (
+		result uint16
+		err    error
+	)
+	if err = n.GetWithReceiver(key, &result); nil != err {
+		return 0, err
+	}
+	return result, nil
+}
+
+func (n *normal) GetUint32(key interface{}) (uint32, error) {
+	var (
+		result uint32
+		err    error
+	)
+	if err = n.GetWithReceiver(key, &result); nil != err {
+		return 0, err
+	}
+	return result, nil
+}
+
+func (n *normal) GetUint64(key interface{}) (uint64, error) {
+	var (
+		result uint64
+		err    error
+	)
+	if err = n.GetWithReceiver(key, &result); nil != err {
+		return 0, err
+	}
+	return result, nil
+}
+
+func (n *normal) GetInt(key interface{}) (int, error) {
+	var (
+		result int
+		err    error
+	)
+	if err = n.GetWithReceiver(key, &result); nil != err {
+		return 0, err
+	}
+	return result, nil
+}
+
+func (n *normal) GetInt8(key interface{}) (int8, error) {
+	var (
+		result int8
+		err    error
+	)
+	if err = n.GetWithReceiver(key, &result); nil != err {
+		return 0, err
+	}
+	return result, nil
+}
+
+func (n *normal) GetInt16(key interface{}) (int16, error) {
+	var (
+		result int16
+		err    error
+	)
+	if err = n.GetWithReceiver(key, &result); nil != err {
+		return 0, err
+	}
+	return result, nil
+}
+
+func (n *normal) GetInt32(key interface{}) (int32, error) {
+	var (
+		result int32
+		err    error
+	)
+	if err = n.GetWithReceiver(key, &result); nil != err {
+		return 0, err
+	}
+	return result, nil
+}
+
+func (n *normal) GetInt64(key interface{}) (int64, error) {
+	var (
+		result int64
+		err    error
+	)
+	if err = n.GetWithReceiver(key, &result); nil != err {
+		return 0, err
+	}
+	return result, nil
+}
+
+func (n *normal) GetFloat32(key interface{}) (float32, error) {
+	var (
+		result float32
+		err    error
+	)
+	if err = n.GetWithReceiver(key, &result); nil != err {
+		return 0, err
+	}
+	return result, nil
+}
+
+func (n *normal) GetFloat64(key interface{}) (float64, error) {
+	var (
+		result float64
+		err    error
+	)
+	if err = n.GetWithReceiver(key, &result); nil != err {
+		return 0, err
+	}
+	return result, nil
+}
+
+func (n *normal) GetBool(key interface{}) (bool, error) {
+	var (
+		result bool
+		err    error
+	)
+	if err = n.GetWithReceiver(key, &result); nil != err {
+		return false, err
+	}
+	return result, nil
+}
+
+func (n *normal) GetString(key interface{}) (string, error) {
+	var (
+		result string
+		err    error
+	)
+	if err = n.GetWithReceiver(key, &result); nil != err {
+		return "", err
+	}
+	return result, nil
+}
+
+func (n *normal) Set(key interface{}, value interface{}) {
+	n.Lock()
+	defer n.Unlock()
+	n.data[key] = value
+}
+
+func (n *normal) Del(key interface{}) {
+	n.Lock()
+	defer n.Unlock()
+	delete(n.data, key)
+}
+
+func (n *normal) Exist(key interface{}) bool {
+	n.RLock()
+	defer n.RUnlock()
+	_, exist := n.data[key]
+	return exist
+}
+
+// GetAll 读取全部数据使用的是原始数据深拷贝,避免获取到全部数据之后,直接读取导致并发读写
+//
+// Author : go_developer@163.com<张德满>
+//
+// Date : 10:36 下午 2021/2/23
+func (n *normal) GetAll() map[interface{}]interface{} {
+	result := make(map[interface{}]interface{})
+	n.lock.RLock()
+	defer n.lock.RUnlock()
+	for key, val := range n.data {
+		result[key] = val
+	}
+	return result
+}
+
+func (n *normal) RLock() {
+	if n.withLock {
+		n.lock.RLock()
+	}
+}
+
+func (n *normal) RUnlock() {
+	if n.withLock {
+		n.lock.RUnlock()
+	}
+}
+
+func (n *normal) Lock() {
+	if n.withLock {
+		n.lock.Lock()
+	}
+}
+
+func (n *normal) Unlock() {
+	if n.withLock {
+		n.lock.Unlock()
+	}
+}

go.mod

@@ -0,0 +1,5 @@
+module github.com/go-developer/gopkg
+
+go 1.15
+
+require github.com/pkg/errors v0.9.1

go.sum

@@ -0,0 +1,2 @@
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=