import com.netflix.config.FixedDelayPollingScheduler; //导入依赖的package包/类
@Override
	public PropertySource<?> locate(Environment environment) {
		
		try {
			// configuration from local properties file
			ConcurrentMapConfiguration configFromPropertiesFile = new ConcurrentMapConfiguration(new PropertiesConfiguration("application.yml"));
			
			// configuration from system properties
			ConcurrentMapConfiguration configFromSystemProperties = new ConcurrentMapConfiguration(new SystemConfiguration());
			
			// configuration from a dynamic source
//			PolledConfigurationSource source = new NetflixUrlPolledConfigurationSource();
			PolledConfigurationSource source = new NetflixEurekaPolledConfigurationSource();
			AbstractPollingScheduler scheduler = new FixedDelayPollingScheduler();
			DynamicConfiguration dynamicConfiguration = new DynamicConfiguration(source, scheduler);
			
			// create a hierarchy of configuration that makes
			// 1) dynamic configuration source override system properties
			// 2) system properties override properties file
			ConcurrentCompositeConfiguration finalConfig = new ConcurrentCompositeConfiguration();
			finalConfig.addConfiguration(dynamicConfiguration, "dynamicConfig");
			finalConfig.addConfiguration(configFromSystemProperties, "systemConfig");
			finalConfig.addConfiguration(configFromPropertiesFile, "fileConfig");
			
			// install with ConfigurationManager so that finalConfig
			// becomes the source of dynamic properties
			ConfigurationManager.install(finalConfig);
		} catch(Exception e) {
			logger.error(e.getMessage());
		}
		
		return null;
	}
 

import com.netflix.config.FixedDelayPollingScheduler; //导入依赖的package包/类
@Test
public void translatesKeys() {
    String srcKey = FixedDelayPollingScheduler.DELAY_PROPERTY;
    String translatedKey = "conqueso.poll.interval";
    String value = "15";
    
    Map<String, String> results = getMetadataFromProperties(srcKey, value);
    
    assertTrue(results.containsKey(translatedKey));
    assertEquals(value, results.get(translatedKey));
}
 

import com.netflix.config.FixedDelayPollingScheduler; //导入依赖的package包/类
@Bean
static AbstractPollingScheduler pollingScheduler(ConfigurableApplicationContext applicationContext) {
  int initialDelayMillis = applicationContext.getEnvironment().getProperty(FixedDelayPollingScheduler.INITIAL_DELAY_PROPERTY, Integer.class, 0);
  int delayMillis = applicationContext.getEnvironment().getProperty(FixedDelayPollingScheduler.DELAY_PROPERTY, Integer.class, (int) TimeUnit.SECONDS.toMillis(15));
  return new FixedDelayPollingScheduler(initialDelayMillis, delayMillis, false);
}