[improvement][chat]Make a few code restructure.

headless/api/src/main/java/com/tencent/supersonic/headless/api/pojo/response/ParseResp.java

@@ -1,16 +1,16 @@
 package com.tencent.supersonic.headless.api.pojo.response;
 
 import com.google.common.collect.Lists;
-import com.tencent.supersonic.common.pojo.Text2SQLExemplar;
 import com.tencent.supersonic.headless.api.pojo.SemanticParseInfo;
 import lombok.Data;
 
+import java.io.Serializable;
 import java.util.Comparator;
 import java.util.List;
 import java.util.stream.Collectors;
 
 @Data
-public class ParseResp {
+public class ParseResp implements Serializable {
     private final String queryText;
     private ParseState state = ParseState.PENDING;
     private String errorMsg;

headless/api/src/main/java/com/tencent/supersonic/headless/api/pojo/response/ParseTimeCostResp.java

@@ -2,8 +2,10 @@ package com.tencent.supersonic.headless.api.pojo.response;
 
 import lombok.Data;
 
+import java.io.Serializable;
+
 @Data
-public class ParseTimeCostResp {
+public class ParseTimeCostResp implements Serializable {
 
     private long parseStartTime;
     private long parseTime;

headless/chat/src/main/java/com/tencent/supersonic/headless/chat/ChatQueryContext.java

@@ -8,6 +8,7 @@ import com.tencent.supersonic.headless.api.pojo.SemanticParseInfo;
 import com.tencent.supersonic.headless.api.pojo.SemanticSchema;
 import com.tencent.supersonic.headless.api.pojo.enums.ChatWorkflowState;
 import com.tencent.supersonic.headless.api.pojo.request.QueryNLReq;
+import com.tencent.supersonic.headless.api.pojo.response.ParseResp;
 import com.tencent.supersonic.headless.chat.query.SemanticQuery;
 import lombok.Data;
 
@@ -23,6 +24,7 @@ import java.util.stream.Collectors;
 public class ChatQueryContext implements Serializable {
 
     private QueryNLReq request;
+    private ParseResp parseResp;
     private Map<Long, List<Long>> modelIdToDataSetIds;
     private List<SemanticQuery> candidateQueries = new ArrayList<>();
     private SchemaMapInfo mapInfo = new SchemaMapInfo();

headless/server/src/main/java/com/tencent/supersonic/headless/server/facade/service/impl/S2ChatLayerService.java

@@ -65,14 +65,15 @@ public class S2ChatLayerService implements ChatLayerService {
 
     @Override
     public ParseResp parse(QueryNLReq queryNLReq) {
-        ParseResp parseResult = new ParseResp(queryNLReq.getQueryText());
+        ParseResp parseResp = new ParseResp(queryNLReq.getQueryText());
         ChatQueryContext queryCtx = buildChatQueryContext(queryNLReq);
+        queryCtx.setParseResp(parseResp);
         if (queryCtx.getMapInfo().isEmpty()) {
-            chatWorkflowEngine.start(ChatWorkflowState.MAPPING, queryCtx, parseResult);
+            chatWorkflowEngine.start(ChatWorkflowState.MAPPING, queryCtx);
         } else {
-            chatWorkflowEngine.start(ChatWorkflowState.PARSING, queryCtx, parseResult);
+            chatWorkflowEngine.start(ChatWorkflowState.PARSING, queryCtx);
         }
-        return parseResult;
+        return parseResp;
     }
 
     public void correct(QuerySqlReq querySqlReq, User user) {

headless/server/src/main/java/com/tencent/supersonic/headless/server/utils/ChatWorkflowEngine.java

@@ -34,8 +34,8 @@ public class ChatWorkflowEngine {
     private final List<SemanticCorrector> semanticCorrectors =
             CoreComponentFactory.getSemanticCorrectors();
 
-    public void start(ChatWorkflowState initialState, ChatQueryContext queryCtx,
-            ParseResp parseResult) {
+    public void start(ChatWorkflowState initialState, ChatQueryContext queryCtx) {
+        ParseResp parseResult = queryCtx.getParseResp();
         queryCtx.setChatWorkflowState(initialState);
         while (queryCtx.getChatWorkflowState() != ChatWorkflowState.FINISHED) {
             switch (queryCtx.getChatWorkflowState()) {