[Fix-5714] When updating the existing alarm instance, the creation time should't be updated (#5715)

* add a new init method.

dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/AlertPluginInstanceServiceImpl.java

@@ -35,6 +35,7 @@ import org.apache.dolphinscheduler.spi.params.PluginParamsTransfer;
 
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -109,11 +110,9 @@ public class AlertPluginInstanceServiceImpl extends BaseServiceImpl implements A
     @Override
     public Map<String, Object> update(User loginUser, int pluginInstanceId, String instanceName, String pluginInstanceParams) {
 
-        AlertPluginInstance alertPluginInstance = new AlertPluginInstance();
         String paramsMapJson = parsePluginParamsMap(pluginInstanceParams);
-        alertPluginInstance.setPluginInstanceParams(paramsMapJson);
-        alertPluginInstance.setInstanceName(instanceName);
-        alertPluginInstance.setId(pluginInstanceId);
+        AlertPluginInstance alertPluginInstance = new AlertPluginInstance(pluginInstanceId, paramsMapJson, instanceName, new Date());
+
         Map<String, Object> result = new HashMap<>();
         int i = alertPluginInstanceMapper.updateById(alertPluginInstance);
 

dolphinscheduler-dao/src/main/java/org/apache/dolphinscheduler/dao/entity/AlertPluginInstance.java

@@ -80,6 +80,13 @@ public class AlertPluginInstance {
         this.instanceName = instanceName;
     }
 
+    public AlertPluginInstance(int id, String pluginInstanceParams, String instanceName, Date updateDate) {
+        this.id = id;
+        this.pluginInstanceParams = pluginInstanceParams;
+        this.updateTime = updateDate;
+        this.instanceName = instanceName;
+    }
+
     public int getId() {
         return id;
     }