Polish alibaba/spring-cloud-alibaba#1739 : Sync the Seata from master

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-seata/src/main/java/com/alibaba/cloud/seata/web/SeataHandlerInterceptor.java

@@ -19,11 +19,11 @@ package com.alibaba.cloud.seata.web;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
+import io.seata.common.util.StringUtils;
 import io.seata.core.context.RootContext;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import org.springframework.util.StringUtils;
 import org.springframework.web.servlet.HandlerInterceptor;
 
 /**
@@ -50,7 +50,7 @@ public class SeataHandlerInterceptor implements HandlerInterceptor {
 			log.debug("xid in RootContext {} xid in RpcContext {}", xid, rpcXid);
 		}
 
-		if (xid == null && rpcXid != null) {
+		if (StringUtils.isBlank(xid) && rpcXid != null) {
 			RootContext.bind(rpcXid);
 			if (log.isDebugEnabled()) {
 				log.debug("bind {} to RootContext", rpcXid);
@@ -62,22 +62,23 @@ public class SeataHandlerInterceptor implements HandlerInterceptor {
 	@Override
 	public void afterCompletion(HttpServletRequest request, HttpServletResponse response,
 			Object handler, Exception e) {
+		if (StringUtils.isNotBlank(RootContext.getXID())) {
+			String rpcXid = request.getHeader(RootContext.KEY_XID);
 
-		String rpcXid = request.getHeader(RootContext.KEY_XID);
-
-		if (StringUtils.isEmpty(rpcXid)) {
-			return;
-		}
+			if (StringUtils.isEmpty(rpcXid)) {
+				return;
+			}
 
-		String unbindXid = RootContext.unbind();
-		if (log.isDebugEnabled()) {
-			log.debug("unbind {} from RootContext", unbindXid);
-		}
-		if (!rpcXid.equalsIgnoreCase(unbindXid)) {
-			log.warn("xid in change during RPC from {} to {}", rpcXid, unbindXid);
-			if (unbindXid != null) {
-				RootContext.bind(unbindXid);
-				log.warn("bind {} back to RootContext", unbindXid);
+			String unbindXid = RootContext.unbind();
+			if (log.isDebugEnabled()) {
+				log.debug("unbind {} from RootContext", unbindXid);
+			}
+			if (!rpcXid.equalsIgnoreCase(unbindXid)) {
+				log.warn("xid in change during RPC from {} to {}", rpcXid, unbindXid);
+				if (unbindXid != null) {
+					RootContext.bind(unbindXid);
+					log.warn("bind {} back to RootContext", unbindXid);
+				}
 			}
 		}
 	}