Merge remote-tracking branch 'origin/master'

skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/storage/StorageChainController.java

 package com.ai.cloud.skywalking.reciever.storage;
 
+import static com.ai.cloud.skywalking.reciever.conf.Config.StorageChain.STORAGE_TYPE;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
 import com.ai.cloud.skywalking.protocol.Span;
 import com.ai.cloud.skywalking.reciever.conf.Constants;
 import com.ai.cloud.skywalking.reciever.selfexamination.ServerHealthCollector;
 import com.ai.cloud.skywalking.reciever.selfexamination.ServerHeathReading;
 import com.ai.cloud.skywalking.reciever.storage.chain.AlarmChain;
 import com.ai.cloud.skywalking.reciever.storage.chain.SaveToHBaseChain;
-import com.ai.cloud.skywalking.reciever.storage.chain.SaveToMySQLChain;
-import org.apache.logging.log4j.LogManager;
-import org.apache.logging.log4j.Logger;
-
-import java.util.ArrayList;
-import java.util.List;
-
-import static com.ai.cloud.skywalking.reciever.conf.Config.StorageChain.STORAGE_TYPE;
 
 public class StorageChainController {
     private static Logger logger = LogManager
@@ -25,8 +25,6 @@ public class StorageChainController {
         if (STORAGE_TYPE.equalsIgnoreCase("hbase")) {
             chainArray.add(new AlarmChain());
             chainArray.add(new SaveToHBaseChain());
-        } else if (STORAGE_TYPE.equalsIgnoreCase("mysql")) {
-            chainArray.add(new SaveToMySQLChain());
         } else {
             throw new RuntimeException("illegal storage type.");
         }

skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/storage/chain/SaveToMySQLChain.java

-package com.ai.cloud.skywalking.reciever.storage.chain;
-
-import com.ai.cloud.skywalking.protocol.Span;
-import com.ai.cloud.skywalking.reciever.storage.Chain;
-import com.ai.cloud.skywalking.reciever.storage.IStorageChain;
-
-import java.util.List;
-
-public class SaveToMySQLChain implements IStorageChain {
-
-    @Override
-    public void doChain(List<Span> entry, Chain chain) {
-        // TODO Auto-generated method stub
-
-    }
-
-}