新增：zdb 客户端程序实现，其他修改

src/com/zdemo/redis/RedisConsumer.java

@@ -15,7 +15,7 @@ import java.net.InetSocketAddress;
 import java.net.Socket;
 import java.util.logging.Level;
 
-public abstract class RedisConsumer extends AbstractConsumer implements IConsumer, Service {
+public class RedisConsumer extends AbstractConsumer implements IConsumer, Service {
 
     @Resource(name = "property.redis.host")
     private String host = "127.0.0.1";
@@ -81,6 +81,11 @@ public abstract class RedisConsumer extends AbstractConsumer implements IConsume
         }).start();
     }
 
+    @Override
+    public String getGroupid() {
+        return null;
+    }
+
     @Override
     public void addEventType(EventType... eventType) {
         for (EventType type : eventType) {