ChoGathK / apollo-node-client

Node.js Client for Apollo.

apollo-node-client

Node.js Client for Apollo

install

$ npm install apollo-node-client --save

Examples

examples

Usage

实例化 ConfigService

const { ConfigService } = require('apollo-node-client');

const service = new ConfigService({
  configServerUrl: 'http://localhost:8080/',
  appId: 'SampleApp',
  clusterName: 'default',
  secret: 'cf86d564d10a46d4a5989dfdeed3a3a2'
});

获取默认 namespace 的配置（application）

const config = await service.getAppConfig();
config.getAllConfig();                                          // Map(1) { 'mysql.user' => 'root' }
console.log(config.getProperty('mysql.user'));                  // root
console.log(config.getProperty('mysql.missing'), 'default');    // default

获取 properties 格式 namespace 的配置

const config = await service.getConfig('application');
config.getAllConfig();                                          // Map(1) { 'mysql.user' => 'root' }
console.log(config.getProperty('mysql.user'));                  // root
console.log(config.getProperty('mysql.missing'), 'default');    // default

获取 json 格式 namespace 的配置

const config = await service.getConfig('config.json');
config.getAllConfig();                                          // { mysql: { user: 'root' } }
console.log(config.getProperty('mysql.user'));                  // root
console.log(config.getProperty('mysql.missing'), 'default');    // default

指定灰度发布的服务 ip

const config = await service.getConfig('application', '192.168.3.4');
config.getAllConfig();                                          // Map(1) { 'mysql.user' => 'root' }
console.log(config.getProperty('mysql.user'));                  // root
console.log(config.getProperty('mysql.missing'), 'default');    // default

监听配置变化事件

config.addChangeListener((changeEvent) => {
  for (const key of changeEvent.changedKeys()) {
    const change = changeEvent.getChange(key);
    if (change) {
      console.log(`namespace: ${change.getNamespace()},
        changeType: ${change.getChangeType()},
        propertyName: ${change.getPropertyName()},
        oldValue: ${change.getOldValue()},
        newValue: ${change.getNewValue()}`);
    }
  }
});

API

Class: ConfigService

• new ConfigService( options )

  • options <Object>

    • configServerUrl <string> Apollo 配置服务的地址
    • appId <string> 应用的 appId
    • [clusterName] <string> 集群名
    • [secret] <string> 服务端密钥 access key

  • Returns: ConfigService

---

• configService.getAppConfig( [ ip ] )

  • [ip] <string> 应用部署的机器ip

  • Returns: Promise<PropertiesConfig> 默认的 namespace 为 application

---

• configService.getConfig( namespaceName, [ ip ] )

  • namespaceName <string> Namespace的名字，以后缀名判断是什么类型格式的 Config。如果没有后缀名，默认为 properties，目前只支持 .json，.properties

  • [ip] <string> 应用部署的机器ip

  • Returns: Promise<PropertiesConfig | JSONConfig>

---

Class: PropertiesConfig

• propertiesConfig.getAllConfig()

  • Returns: Map<string, string>

---

• propertiesConfig.getProperty( key, [ defaultValue ] )

  • key <string> 要获取的配置的 key

  • [defaultValue] <string> 默认值，当传入的 key 不存在时，会返回 defaultValue

  • Returns: undefined | string

---

• propertiesConfig.addChangeListener( handle )

  • handle ( changeEvent: ConfigChangeEvent<string> ) => void 监听配置变化事件的回调函数

  • Returns: void

---

Class: JSONConfig

• jsonConfig.getAllConfig()

  • Returns: JSONValueType

---

• jsonConfig.getProperty( key, [ defaultValue ] )

  • key <string> 要获取的配置的 key

  • [defaultValue] <string> 默认值，当传入的 key 不存在时，会返回 defaultValue

  • Returns: undefined | JSONValueType

---

• jsonConfig.addChangeListener( handle )

  • handle ( changeEvent: ConfigChangeEvent<JSONValueType> ) => void 监听配置变化事件的回调函数

  • Returns: void

---

Class: ConfigChangeEvent

• configChangeEvent.getNamespace()

  • Returns: string

---

• configChangeEvent.changedKeys()

  • Returns: string[]

---

• configChangeEvent.getChange()

  • Returns: undefined | ConfigChange<T>

---

Class: ConfigChange<T>

• configChange.getNamespace()

  • Returns: string

---

• configChange.getPropertyName()

  • Returns: string

---

• configChange.getOldValues()

  • Returns: undefined | T

---

• configChange.getNewValue()

  • Returns: undefined | T

---

• configChange.getChangeType()

  • Returns: PropertyChangeType

---

Enum: PropertyChangeType

• propertyChangeType.ADDED

---

• propertyChangeType.MODIFIED

---

• propertyChangeType.DELETED