Error code for cache module

ERROR_SPECIFICATION.md

@@ -1 +1,5 @@
 # Error Module
+
+## Module code
+- httplib 1
+- cache 2

client/cache/cache.go

@@ -33,8 +33,9 @@ package cache
 
 import (
 	"context"
-	"fmt"
 	"time"
+
+	"github.com/beego/beego/v2/core/berror"
 )
 
 // Cache interface contains all behaviors for cache adapter.
@@ -78,7 +79,7 @@ var adapters = make(map[string]Instance)
 // it panics.
 func Register(name string, adapter Instance) {
 	if adapter == nil {
-		panic("cache: Register adapter is nil")
+		panic(berror.Error(NilCacheAdapter, "cache: Register adapter is nil").Error())
 	}
 	if _, ok := adapters[name]; ok {
 		panic("cache: Register called twice for adapter " + name)
@@ -92,7 +93,7 @@ func Register(name string, adapter Instance) {
 func NewCache(adapterName, config string) (adapter Cache, err error) {
 	instanceFunc, ok := adapters[adapterName]
 	if !ok {
-		err = fmt.Errorf("cache: unknown adapter name %q (forgot to import?)", adapterName)
+		err = berror.Errorf(UnknownAdapter, "cache: unknown adapter name %s (forgot to import?)", adapterName)
 		return
 	}
 	adapter = instanceFunc()

client/cache/calc_utils.go

@@ -1,46 +1,55 @@
 package cache
 
 import (
-	"fmt"
 	"math"
+
+	"github.com/beego/beego/v2/core/berror"
 )
 
+var (
+	ErrIncrementOverflow = berror.Error(IncrementOverflow, "this incr invocation will overflow.")
+	ErrDecrementOverflow = berror.Error(DecrementOverflow, "this decr invocation will overflow.")
+	ErrNotIntegerType = berror.Error(NotIntegerType, "item val is not (u)int (u)int32 (u)int64")
+)
+
+
+
 func incr(originVal interface{}) (interface{}, error) {
 	switch val := originVal.(type) {
 	case int:
 		tmp := val + 1
 		if val > 0 && tmp < 0 {
-			return nil, fmt.Errorf("increment would overflow")
+			return nil, ErrIncrementOverflow
 		}
 		return tmp, nil
 	case int32:
 		if val == math.MaxInt32 {
-			return nil, fmt.Errorf("increment would overflow")
+			return nil, ErrIncrementOverflow
 		}
 		return val + 1, nil
 	case int64:
 		if val == math.MaxInt64 {
-			return nil, fmt.Errorf("increment would overflow")
+			return nil, ErrIncrementOverflow
 		}
 		return val + 1, nil
 	case uint:
 		tmp := val + 1
 		if tmp < val {
-			return nil, fmt.Errorf("increment would overflow")
+			return nil, ErrIncrementOverflow
 		}
 		return tmp, nil
 	case uint32:
 		if val == math.MaxUint32 {
-			return nil, fmt.Errorf("increment would overflow")
+			return nil, ErrIncrementOverflow
 		}
 		return val + 1, nil
 	case uint64:
 		if val == math.MaxUint64 {
-			return nil, fmt.Errorf("increment would overflow")
+			return nil, ErrIncrementOverflow
 		}
 		return val + 1, nil
 	default:
-		return nil, fmt.Errorf("item val is not (u)int (u)int32 (u)int64")
+		return nil, ErrNotIntegerType
 	}
 }
 
@@ -49,35 +58,35 @@ func decr(originVal interface{}) (interface{}, error) {
 	case int:
 		tmp := val - 1
 		if val < 0 && tmp > 0 {
-			return nil, fmt.Errorf("decrement would overflow")
+			return nil, ErrDecrementOverflow
 		}
 		return tmp, nil
 	case int32:
 		if val == math.MinInt32 {
-			return nil, fmt.Errorf("decrement would overflow")
+			return nil, ErrDecrementOverflow
 		}
 		return val - 1, nil
 	case int64:
 		if val == math.MinInt64 {
-			return nil, fmt.Errorf("decrement would overflow")
+			return nil, ErrDecrementOverflow
 		}
 		return val - 1, nil
 	case uint:
 		if val == 0 {
-			return nil, fmt.Errorf("decrement would overflow")
+			return nil, ErrDecrementOverflow
 		}
 		return val - 1, nil
 	case uint32:
 		if val == 0 {
-			return nil, fmt.Errorf("increment would overflow")
+			return nil, ErrDecrementOverflow
 		}
 		return val - 1, nil
 	case uint64:
 		if val == 0 {
-			return nil, fmt.Errorf("increment would overflow")
+			return nil, ErrDecrementOverflow
 		}
 		return val - 1, nil
 	default:
-		return nil, fmt.Errorf("item val is not (u)int (u)int32 (u)int64")
+		return nil, ErrNotIntegerType
 	}
 }

client/cache/calc_utils_test.go

@@ -4,6 +4,8 @@ import (
 	"math"
 	"strconv"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestIncr(t *testing.T) {
@@ -11,116 +13,65 @@ func TestIncr(t *testing.T) {
 	var originVal interface{} = int(1)
 	var updateVal interface{} = int(2)
 	val, err := incr(originVal)
-	if err != nil {
+	assert.Nil(t, err)
-		t.Errorf("incr failed, err: %s", err.Error())
+	assert.Equal(t, val, updateVal)
-		return
+
-	}
-	if val != updateVal {
-		t.Errorf("incr failed, expect %v, but %v actually", updateVal, val)
-		return
-	}
 	_, err = incr(int(1<<(strconv.IntSize-1) - 1))
-	if err == nil {
+	assert.Equal(t, ErrIncrementOverflow, err)
-		t.Error("incr failed")
-		return
-	}
 
 	// int32
 	originVal = int32(1)
 	updateVal = int32(2)
 	val, err = incr(originVal)
-	if err != nil {
+	assert.Nil(t, err)
-		t.Errorf("incr failed, err: %s", err.Error())
+	assert.Equal(t, val, updateVal)
-		return
+
-	}
-	if val != updateVal {
-		t.Errorf("incr failed, expect %v, but %v actually", updateVal, val)
-		return
-	}
 	_, err = incr(int32(math.MaxInt32))
-	if err == nil {
+	assert.Equal(t, ErrIncrementOverflow, err)
-		t.Error("incr failed")
-		return
-	}
 
 	// int64
 	originVal = int64(1)
 	updateVal = int64(2)
 	val, err = incr(originVal)
-	if err != nil {
+	assert.Nil(t, err)
-		t.Errorf("incr failed, err: %s", err.Error())
+	assert.Equal(t, val, updateVal)
-		return
+
-	}
-	if val != updateVal {
-		t.Errorf("incr failed, expect %v, but %v actually", updateVal, val)
-		return
-	}
 	_, err = incr(int64(math.MaxInt64))
-	if err == nil {
+	assert.Equal(t, ErrIncrementOverflow, err)
-		t.Error("incr failed")
-		return
-	}
 
 	// uint
 	originVal = uint(1)
 	updateVal = uint(2)
 	val, err = incr(originVal)
-	if err != nil {
+
-		t.Errorf("incr failed, err: %s", err.Error())
+	assert.Nil(t, err)
-		return
+	assert.Equal(t, val, updateVal)
-	}
+
-	if val != updateVal {
-		t.Errorf("incr failed, expect %v, but %v actually", updateVal, val)
-		return
-	}
 	_, err = incr(uint(1<<(strconv.IntSize) - 1))
-	if err == nil {
+	assert.Equal(t, ErrIncrementOverflow, err)
-		t.Error("incr failed")
-		return
-	}
 
 	// uint32
 	originVal = uint32(1)
 	updateVal = uint32(2)
 	val, err = incr(originVal)
-	if err != nil {
+	assert.Nil(t, err)
-		t.Errorf("incr failed, err: %s", err.Error())
+	assert.Equal(t, val, updateVal)
-		return
+
-	}
-	if val != updateVal {
-		t.Errorf("incr failed, expect %v, but %v actually", updateVal, val)
-		return
-	}
 	_, err = incr(uint32(math.MaxUint32))
-	if err == nil {
+	assert.Equal(t, ErrIncrementOverflow, err)
-		t.Error("incr failed")
-		return
-	}
 
 	// uint64
 	originVal = uint64(1)
 	updateVal = uint64(2)
 	val, err = incr(originVal)
-	if err != nil {
+	assert.Nil(t, err)
-		t.Errorf("incr failed, err: %s", err.Error())
+	assert.Equal(t, val, updateVal)
-		return
-	}
-	if val != updateVal {
-		t.Errorf("incr failed, expect %v, but %v actually", updateVal, val)
-		return
-	}
-	_, err = incr(uint64(math.MaxUint64))
-	if err == nil {
-		t.Error("incr failed")
-		return
-	}
 
+	_, err = incr(uint64(math.MaxUint64))
+	assert.Equal(t, ErrIncrementOverflow, err)
 	// other type
 	_, err = incr("string")
-	if err == nil {
+	assert.Equal(t, ErrNotIntegerType, err)
-		t.Error("incr failed")
-		return
-	}
 }
 
 func TestDecr(t *testing.T) {
@@ -128,114 +79,62 @@ func TestDecr(t *testing.T) {
 	var originVal interface{} = int(2)
 	var updateVal interface{} = int(1)
 	val, err := decr(originVal)
-	if err != nil {
+	assert.Nil(t, err)
-		t.Errorf("decr failed, err: %s", err.Error())
+	assert.Equal(t, val, updateVal)
-		return
-	}
-	if val != updateVal {
-		t.Errorf("decr failed, expect %v, but %v actually", updateVal, val)
-		return
-	}
-	_, err = decr(int(-1 << (strconv.IntSize - 1)))
-	if err == nil {
-		t.Error("decr failed")
-		return
-	}
 
+	_, err = decr(int(-1 << (strconv.IntSize - 1)))
+	assert.Equal(t, ErrDecrementOverflow, err)
 	// int32
 	originVal = int32(2)
 	updateVal = int32(1)
 	val, err = decr(originVal)
-	if err != nil {
+	assert.Nil(t, err)
-		t.Errorf("decr failed, err: %s", err.Error())
+	assert.Equal(t, val, updateVal)
-		return
+
-	}
-	if val != updateVal {
-		t.Errorf("decr failed, expect %v, but %v actually", updateVal, val)
-		return
-	}
 	_, err = decr(int32(math.MinInt32))
-	if err == nil {
+	assert.Equal(t, ErrDecrementOverflow, err)
-		t.Error("decr failed")
-		return
-	}
 
 	// int64
 	originVal = int64(2)
 	updateVal = int64(1)
 	val, err = decr(originVal)
-	if err != nil {
+	assert.Nil(t, err)
-		t.Errorf("decr failed, err: %s", err.Error())
+	assert.Equal(t, val, updateVal)
-		return
+
-	}
-	if val != updateVal {
-		t.Errorf("decr failed, expect %v, but %v actually", updateVal, val)
-		return
-	}
 	_, err = decr(int64(math.MinInt64))
-	if err == nil {
+	assert.Equal(t, ErrDecrementOverflow, err)
-		t.Error("decr failed")
-		return
-	}
 
 	// uint
 	originVal = uint(2)
 	updateVal = uint(1)
 	val, err = decr(originVal)
-	if err != nil {
+	assert.Nil(t, err)
-		t.Errorf("decr failed, err: %s", err.Error())
+	assert.Equal(t, val, updateVal)
-		return
+
-	}
-	if val != updateVal {
-		t.Errorf("decr failed, expect %v, but %v actually", updateVal, val)
-		return
-	}
 	_, err = decr(uint(0))
-	if err == nil {
+	assert.Equal(t, ErrDecrementOverflow, err)
-		t.Error("decr failed")
-		return
-	}
 
 	// uint32
 	originVal = uint32(2)
 	updateVal = uint32(1)
 	val, err = decr(originVal)
-	if err != nil {
+	assert.Nil(t, err)
-		t.Errorf("decr failed, err: %s", err.Error())
+	assert.Equal(t, val, updateVal)
-		return
+
-	}
-	if val != updateVal {
-		t.Errorf("decr failed, expect %v, but %v actually", updateVal, val)
-		return
-	}
 	_, err = decr(uint32(0))
-	if err == nil {
+	assert.Equal(t, ErrDecrementOverflow, err)
-		t.Error("decr failed")
-		return
-	}
 
 	// uint64
 	originVal = uint64(2)
 	updateVal = uint64(1)
 	val, err = decr(originVal)
-	if err != nil {
+	assert.Nil(t, err)
-		t.Errorf("decr failed, err: %s", err.Error())
+	assert.Equal(t, val, updateVal)
-		return
+
-	}
-	if val != updateVal {
-		t.Errorf("decr failed, expect %v, but %v actually", updateVal, val)
-		return
-	}
 	_, err = decr(uint64(0))
-	if err == nil {
+	assert.Equal(t, ErrDecrementOverflow, err)
-		t.Error("decr failed")
-		return
-	}
 
 	// other type
 	_, err = decr("string")
-	if err == nil {
+	assert.Equal(t, ErrNotIntegerType, err)
-		t.Error("decr failed")
-		return
-	}
 }

client/cache/error_code.go

@@ -0,0 +1,48 @@
+// Copyright 2021 beego
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cache
+
+import (
+	"github.com/beego/beego/v2/core/berror"
+)
+
+var NilCacheAdapter = berror.DefineCode(4002001, moduleName, "NilCacheAdapter", `
+It means that you register cache adapter by pass nil.
+A cache adapter is an instance of Cache interface. 
+`)
+
+var DuplicateAdapter = berror.DefineCode(4002002, moduleName, "DuplicateAdapter", `
+You register two adapter with same name. In beego cache module, one name one adapter.
+Once you got this error, please check the error stack, search adapter 
+`)
+
+var UnknownAdapter = berror.DefineCode(4002003, moduleName, "UnknownAdapter", `
+Unknown adapter, do you forget to register the adapter?
+You must register adapter before use it. For example, if you want to use redis implementation, 
+you must import the cache/redis package.
+`)
+
+var IncrementOverflow = berror.DefineCode(4002004, moduleName, "IncrementOverflow", `
+The increment operation will overflow.
+`)
+
+var DecrementOverflow = berror.DefineCode(4002005, moduleName, "DecrementOverflow", `
+The decrement operation will overflow.
+`)
+
+var NotIntegerType = berror.DefineCode(4002006, moduleName, "NotIntegerType", `
+The type of value is not (u)int (u)int32 (u)int64. 
+When you want to call Incr or Decr function of Cache API, you must confirm that the value's type is one of (u)int (u)int32 (u)int64.
+`)

client/cache/file.go

@@ -73,22 +73,31 @@ func (fc *FileCache) StartAndGC(config string) error {
 	if err != nil {
 		return err
 	}
-	if _, ok := cfg["CachePath"]; !ok {
+
-		cfg["CachePath"] = FileCachePath
+	const cpKey = "CachePath"
+	const fsKey = "FileSuffix"
+	const dlKey = "DirectoryLevel"
+	const eeKey = "EmbedExpiry"
+
+	if _, ok := cfg[cpKey]; !ok {
+		cfg[cpKey] = FileCachePath
 	}
-	if _, ok := cfg["FileSuffix"]; !ok {
+
-		cfg["FileSuffix"] = FileCacheFileSuffix
+	if _, ok := cfg[fsKey]; !ok {
+		cfg[fsKey] = FileCacheFileSuffix
 	}
-	if _, ok := cfg["DirectoryLevel"]; !ok {
+
-		cfg["DirectoryLevel"] = strconv.Itoa(FileCacheDirectoryLevel)
+	if _, ok := cfg[dlKey]; !ok {
+		cfg[dlKey] = strconv.Itoa(FileCacheDirectoryLevel)
 	}
-	if _, ok := cfg["EmbedExpiry"]; !ok {
+
-		cfg["EmbedExpiry"] = strconv.FormatInt(int64(FileCacheEmbedExpiry.Seconds()), 10)
+	if _, ok := cfg[eeKey]; !ok {
+		cfg[eeKey] = strconv.FormatInt(int64(FileCacheEmbedExpiry.Seconds()), 10)
 	}
-	fc.CachePath = cfg["CachePath"]
+	fc.CachePath = cfg[cpKey]
-	fc.FileSuffix = cfg["FileSuffix"]
+	fc.FileSuffix = cfg[fsKey]
-	fc.DirectoryLevel, _ = strconv.Atoi(cfg["DirectoryLevel"])
+	fc.DirectoryLevel, _ = strconv.Atoi(cfg[dlKey])
-	fc.EmbedExpiry, _ = strconv.Atoi(cfg["EmbedExpiry"])
+	fc.EmbedExpiry, _ = strconv.Atoi(cfg[eeKey])
 
 	fc.Init()
 	return nil

client/cache/module.go

@@ -0,0 +1,17 @@
+// Copyright 2021 beego
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cache
+
+const moduleName = "cache"