import com.ctrip.framework.apollo.Config;

 import com.ctrip.framework.apollo.ConfigChangeListener;

 import com.ctrip.framework.apollo.ConfigService;

 import com.ctrip.framework.apollo.model.ConfigChange;

 import com.ctrip.framework.apollo.model.ConfigChangeEvent;

 import org.slf4j.Logger;

 import org.slf4j.LoggerFactory;

 import java.io.BufferedReader;

 import java.io.IOException;

 import java.io.InputStreamReader;

 /**

  * @author Jason Song(song_s@ctrip.com)

  */

 public class ApolloConfigDemo {

   private static final Logger logger = LoggerFactory.getLogger(ApolloConfigDemo.class);

   private Config config;

   public ApolloConfigDemo() {

     config = ConfigService.getAppConfig();

     config.addChangeListener(new ConfigChangeListener() {

       @Override

       public void onChange(ConfigChangeEvent changeEvent) {

         logger.info("Changes for namespace {}", changeEvent.getNamespace());

         for (String key : changeEvent.changedKeys()) {

           ConfigChange change = changeEvent.getChange(key);

           logger.info("Change - key: {}, oldValue: {}, newValue: {}, changeType: {}",

               change.getPropertyName(), change.getOldValue(), change.getNewValue(),

               change.getChangeType());

         }

       }

     });

   }

   private String getConfig(String key) {

     String result = config.getProperty(key, "undefined");

     logger.info(String.format("Loading key: %s with value: %s", key, result));

     return result;

   }

   public static void main(String[] args) throws IOException {

     ApolloConfigDemo apolloConfigDemo = new ApolloConfigDemo();

     System.out.println(

         "Apollo Config Demo. Please input key to get the value.");

     while (true) {

       System.out.print("> ");

       String input = new BufferedReader(new InputStreamReader(System.in)).readLine();

       if (input == null || input.length() == 0) {

         continue;

       }

       input = input.trim();

       if (input.equalsIgnoreCase("quit")) {

         System.exit(0);

       }

       apolloConfigDemo.getConfig(input);

     }

   }

 }