配置注入
简介
本示例展示了从配置文件注入字段的能力。
在应用开发过程中，从配置文件中读入配置是一个常见的诉求。例如读取数据库的账号密码、下游服务的主机名，以及一些业务配置等。
ioc-golang 框架提供了便捷的基于文件注入配置的能力，使开发者无需手动解析配置文件，无需手动组装对象。
注入模型与结构
关键代码：
import (
github.com/alibaba/ioc-golang/extension/config
)
// +ioc:autowire=true
// +ioc:autowire:type=singleton
type App struct {
DemoConfigString *config.ConfigString `config:",autowire.config.demo-config.string-value"`
DemoConfigInt *config.ConfigInt `config:",autowire.config.demo-config.int-value"`
DemoConfigMap *config.ConfigMap `config:",autowire.config.demo-config.map-value"`
DemoConfigSlice *config.ConfigSlice `config:",autowire.config.demo-config.slice-value"`
}
被注入字段类型
目前支持 ConfigString，ConfigInt，ConfigMap，ConfigSlice 四种类型。
需要以 指针 的形式声明字段类型
标签与注入位置
开发人员可以给结构增加 ``config:
",xxx"标签, 标注需要注入的值类型，以及该字段位于配置文件的位置。例子中的
config:",autowire.config.demo-config.string-value"的意义为，将配置文件内
autowire.config.demo-config.string-value的值注入到该字段。对应配置文件：ioc_golang.yaml 中的字符串 “stringValue”
autowire: config: demo-config: int-value: 123 int64-value: 130117537261158665 float64-value: 0.001 string-value: stringValue map-value: key1: value1 key2: value2 key3: value3 obj: objkey1: objvalue1 objkey2: objvalue2 objkeyslice: objslicevalue slice-value: - sliceValue1 - sliceValue2 - sliceValue3 - sliceValue4
运行示例
cd example/autowire_config/cmd
go run .
___ ___ ____ ____ _
|_ _| / _ \ / ___| / ___| ___ | | __ _ _ __ __ _
| | | | | | | | _____ | | _ / _ \ | | / _` | | '_ \ / _` |
| | | |_| | | |___ |_____| | |_| | | (_) | | | | (_| | | | | | | (_| |
|___| \___/ \____| \____| \___/ |_| \__,_| |_| |_| \__, |
|___/
Welcome to use ioc-golang!
[Boot] Start to load ioc-golang config
[Config] merge config map, depth: [0]
[Boot] Start to load debug
[Debug] Debug mod is not enabled
[Boot] Start to load autowire
[Autowire Type] Found registered autowire type singleton
[Autowire Struct Descriptor] Found type singleton registered SD main.App
[Autowire Type] Found registered autowire type normal
[Autowire Type] Found registered autowire type config
[Autowire Struct Descriptor] Found type config registered SD github.com/alibaba/ioc-golang/extension/config.ConfigInt64
[Autowire Struct Descriptor] Found type config registered SD github.com/alibaba/ioc-golang/extension/config.ConfigInt
[Autowire Struct Descriptor] Found type config registered SD github.com/alibaba/ioc-golang/extension/config.ConfigMap
[Autowire Struct Descriptor] Found type config registered SD github.com/alibaba/ioc-golang/extension/config.ConfigSlice
[Autowire Struct Descriptor] Found type config registered SD github.com/alibaba/ioc-golang/extension/config.ConfigString
[Autowire Struct Descriptor] Found type config registered SD github.com/alibaba/ioc-golang/extension/config.ConfigFloat64
2022/06/06 18:01:22 load config path autowire.config#demo-config#float64-value error = property [autowire config#demo-config#float64-value]'s key config#demo-config#float64-value not found
stringValue
123
map[key1:value1 key2:value2 key3:value3 obj:map[objkey1:objvalue1 objkey2:objvalue2 objkeyslice:objslicevalue]]
[sliceValue1 sliceValue2 sliceValue3 sliceValue4]
130117537261158665
0
stringValue
123
map[key1:value1 key2:value2 key3:value3 obj:map[objkey1:objvalue1 objkey2:objvalue2 objkeyslice:objslicevalue]]
[sliceValue1 sliceValue2 sliceValue3 sliceValue4]
130117537261158665
0
可看到依次打印出了不同结构的注入配置。
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Last modified June 21, 2022: Fix: remove unused file (0fc728c)