Apollo阿波罗配置中心

一、准备工作
1.2.1 AppId classpath:/META-INF/app.properties  内容app.id=YOUR-APP-ID
1.2.2 Environment 对于Mac/Linux，文件位置为/opt/settings/server.properties 例如env=DEV 详细见文档。
1.2.3 本地缓存路径 /opt/data/{appId}/config-cache (权限)
二、Maven Dependency

	com.ctrip.framework.apollo
	apollo-client
	0.7.0

三、客户端用法
3.1 API使用方式

Config config = ConfigService.getAppConfig(); //config instance is singleton for each namespace and is never null
String someKey = "someKeyFromDefaultNamespace";
String someDefaultValue = "someDefaultValueForTheKey";
String value = config.getProperty(someKey, someDefaultValue);

3.1.2 监听配置变化事件

Config config = ConfigService.getAppConfig(); //config instance is singleton for each namespace and is never null
config.addChangeListener(new ConfigChangeListener() {
    @Override
    public void onChange(ConfigChangeEvent changeEvent) {
        System.out.println("Changes for namespace " + changeEvent.getNamespace());
        for (String key : changeEvent.changedKeys()) {
            ConfigChange change = changeEvent.getChange(key);
            System.out.println(String.format("Found change - key: %s, oldValue: %s, newValue: %s, changeType: %s", change.getPropertyName(), change.getOldValue(), change.getNewValue(), change.getChangeType()));
        }
    }
});

3.1.3 获取公共Namespace的配置

String somePublicNamespace = "CAT";
Config config = ConfigService.getConfig(somePublicNamespace); //config instance is singleton for each namespace and is never null
String someKey = "someKeyFromPublicNamespace";
String someDefaultValue = "someDefaultValueForTheKey";
String value = config.getProperty(someKey, someDefaultValue);

3.2 Spring整合方式
3.2.1 基于XML的配置

3.2.3 Spring Annotation支持
Apollo同时还增加了两个新的Annotation来简化在Spring环境中的使用。
@ApolloConfig
用来自动注入Config对象
@ApolloConfigChangeListener

用来自动注册ConfigChangeListener

public class TestApolloAnnotationBean {
  @ApolloConfig
  private Config config; //inject config for namespace application
  @ApolloConfig("application")
  private Config anotherConfig; //inject config for namespace application
  @ApolloConfig("FX.apollo")
  private Config yetAnotherConfig; //inject config for namespace FX.apollo
 
  @Value("${batch:100}")
  private int batch;
  
  //config change listener for namespace application
  @ApolloConfigChangeListener
  private void someOnChange(ConfigChangeEvent changeEvent) {
    //update injected value of batch if it is changed in Apollo
    if (changeEvent.isChanged("batch")) {
      batch = config.getIntProperty("batch", 100);
    }
  }
 
  //config change listener for namespace application
  @ApolloConfigChangeListener("application")
  private void anotherOnChange(ConfigChangeEvent changeEvent) {
    //do something
  }
 
  //config change listener for namespaces application and FX.apollo
  @ApolloConfigChangeListener({"application", "FX.apollo"})
  private void yetAnotherOnChange(ConfigChangeEvent changeEvent) {
    //do something
  }

  //example of getting config from Apollo directly
  //this will always return the latest value of timeout
  public int getTimeout() {
    return config.getIntProperty("timeout", 200);
  }

  //example of getting config from injected value
  //the program needs to update the injected value when batch is changed in Apollo using @ApolloConfigChangeListener shown above
  public int getBatch() {
    return this.batch;
  }
}

转载文章： Apollo配置

github

junit单元测试

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.util.Set;


@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:spring.xml")
public class TestApolloConfig {
    @Autowired
    private ApolloUtil apolloUtil;

    @Test
    public void testAllconfig() throws Exception {
        Set keys = apolloUtil.getPropertyNames();
        for (Object key : keys) {
            String val=apolloUtil.getString(key.toString());
            System.out.println(key.toString() + "===" + val);
        }
    }
}

2、Environment
对于Mac/Linux，文件位置为/opt/settings/server.properties
对于Windows，文件位置为C:\opt\settings\server.properties
3、本地缓存
Mac/Linux: /opt/data/{appId}/config-cache
Windows: C:\opt\data{appId}\config-cache