gokvdb

練習用 golang 開發 嵌入式 Key-Value 資料庫

Installation

$ go get github.com/ahuilee/gokvdb

Example

storage, _ := gokvdb.OpenStorage("path")

String by int64

nameByIdDict := gokvdb.NewI64StrDict(storage, "mydb", "nameByIdDict")

nameByIdDict.Set(1, "name1")
nameByIdDict.Set(2, "name2")

nameByIdDict.Save(true)

txt1, _ := nameByIdDict.Get(1)
txt2, _ := nameByIdDict.Get(2)
// txt1 == "name1"
// txt2 == "name2"

for item := range nameByIdDict.Items() {
	fmt.Printf("key=%v value=%v", item.Key(), item.Value())
}
// key=1 value=name1
// key=2 value=name2

Int64 by string

idByNameDict := gokvdb.NewStrI64Dict(storage, "mydb", "idByNameDict")

idByNameDict.Set("name1", 123456)
idByNameDict.Set("name2", 654321)

idByNameDict.Save(true)

for item := range nameByIdDict.Items() {
	fmt.Printf("key=%v value=%v", item.Key(), item.Value())
}

// key=name1 value=123456
// key=name2 value=654321

Int64Set by int64

friendSetByActId := gokvdb.NewLazyI64I64SetDict(storage, "mydb", "friendSetByActId")

friendSetByActId.Add(1, 2)
friendSetByActId.Add(1, 2)
friendSetByActId.Add(1, 3)
friendSetByActId.Add(1, 3)
friendSetByActId.Add(1, 4)
friendSetByActId.Add(1, 5)

friendSetByActId.Save(true)

result, _ := friendSetByActId.Get(1)

fmt.Println(result.Values())
// output: 2, 3, 4, 5

Int64Set by string

intSetByName := gokvdb.NewLazyI64I64SetDict(storage, "mydb", "intSetByName")

intSetByName.Add("taiwan", 1)
intSetByName.Add("taiwan", 1)
intSetByName.Add("taiwan", 2)
intSetByName.Add("taiwan", 2)
intSetByName.Add("taiwan", 3)
intSetByName.Add("taiwan", 3)
intSetByName.Add("taipei", 5)
intSetByName.Add("taipei", 6)
intSetByName.Add("taipei", 7)
intSetByName.Add("taipei", 7)

intSetByName.Save(true)

for item := range intSetByName.Items() {
	fmt.Println(item.Key(), item.Values())
}

// output:
// taiwan 1
// taiwan 2
// taiwan 3
// taipei 5
// taipei 6
// taipei 7