fix(alert): keep datasource in alert rule export/import

hertzbeat-alerter/src/main/java/org/apache/hertzbeat/alert/dto/AlertDefineDTO.java

@@ -51,4 +51,6 @@ public class AlertDefineDTO {
     private String template;
     @Excel(name = "Enable")
     private Boolean enable;
+    @Excel(name = "Datasource")
+    private String datasource;
 }

hertzbeat-alerter/src/main/java/org/apache/hertzbeat/alert/service/impl/AlertDefineExcelImExportServiceImpl.java

@@ -155,6 +155,7 @@ private AlertDefineDTO extractAlertDefineDataFromRow(Row row) {
         alertDefineDTO.setAnnotations(JsonUtil.fromJson(getCellValueAsString(row.getCell(6)), typeReference));
         alertDefineDTO.setTemplate(getCellValueAsString(row.getCell(7)));
         alertDefineDTO.setEnable(getCellValueAsBoolean(row.getCell(8)));
+        alertDefineDTO.setDatasource(getCellValueAsString(row.getCell(9)));
         return alertDefineDTO;
     }
 
@@ -186,7 +187,7 @@ public void writeOs(List<ExportAlertDefineDTO> exportAlertDefineList, OutputStre
             CellStyle cellStyle = workbook.createCellStyle();
             cellStyle.setAlignment(HorizontalAlignment.CENTER);
             // set header
-            String[] headers = {"Name", "Type", "Expr", "Period", "Times", "Labels", "Annotations", "Template", "Enable"};
+            String[] headers = {"Name", "Type", "Expr", "Period", "Times", "Labels", "Annotations", "Template", "Enable", "Datasource"};
             Row headerRow = sheet.createRow(0);
             for (int i = 0; i < headers.length; i++) {
                 Cell cell = headerRow.createCell(i);
@@ -227,6 +228,9 @@ public void writeOs(List<ExportAlertDefineDTO> exportAlertDefineList, OutputStre
                 Cell enableCell = row.createCell(8);
                 enableCell.setCellValue(alertDefineDTO.getEnable());
                 enableCell.setCellStyle(cellStyle);
+                Cell datasourceCell = row.createCell(9);
+                datasourceCell.setCellValue(alertDefineDTO.getDatasource());
+                datasourceCell.setCellStyle(cellStyle);
             }
             workbook.write(os);
             os.close();

hertzbeat-alerter/src/test/java/org/apache/hertzbeat/alert/service/AlertDefineExcelImExportServiceTest.java

@@ -69,6 +69,7 @@ public void setUp() throws IOException {
         row.createCell(6).setCellValue(JsonUtil.toJson(Map.of("key", "value")));
         row.createCell(7).setCellValue("template1");
         row.createCell(8).setCellValue(true);
+        row.createCell(9).setCellValue("promql");
 
         ByteArrayInputStream inputStream = new ByteArrayInputStream(toByteArray(initialWorkbook));
 
@@ -93,6 +94,7 @@ public void testParseImport() throws IOException {
             assertEquals(Map.of("key", "value"), alertDefineDTO.getAnnotations());
             assertEquals("template1", alertDefineDTO.getTemplate());
             assertTrue(alertDefineDTO.getEnable());
+            assertEquals("promql", alertDefineDTO.getDatasource());
         }
     }
 
@@ -111,6 +113,7 @@ public void testWriteOs() throws IOException {
         alertDefineDTO.setAnnotations(Map.of("key", "value"));
         alertDefineDTO.setTemplate("template1");
         alertDefineDTO.setEnable(true);
+        alertDefineDTO.setDatasource("promql");
         exportAlertDefineDTO.setAlertDefine(alertDefineDTO);
         exportAlertDefineList.add(exportAlertDefineDTO);
 
@@ -129,6 +132,7 @@ public void testWriteOs() throws IOException {
                 assertEquals("Annotations", headerRow.getCell(6).getStringCellValue());
                 assertEquals("Template", headerRow.getCell(7).getStringCellValue());
                 assertEquals("Enable", headerRow.getCell(8).getStringCellValue());
+                assertEquals("Datasource", headerRow.getCell(9).getStringCellValue());
 
                 Row dataRow = resultSheet.getRow(1);
                 assertEquals("app1", dataRow.getCell(0).getStringCellValue());
@@ -140,6 +144,7 @@ public void testWriteOs() throws IOException {
                 assertEquals(JsonUtil.toJson(Map.of("key", "value")), dataRow.getCell(6).getStringCellValue());
                 assertEquals("template1", dataRow.getCell(7).getStringCellValue());
                 assertTrue(dataRow.getCell(8).getBooleanCellValue());
+                assertEquals("promql", dataRow.getCell(9).getStringCellValue());
             }
         }
     }

hertzbeat-alerter/src/test/java/org/apache/hertzbeat/alert/service/AlertDefineJsonImExportServiceTest.java

@@ -21,6 +21,8 @@
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.InputStream;
@@ -29,8 +31,10 @@
 import org.apache.hertzbeat.alert.dto.AlertDefineDTO;
 import org.apache.hertzbeat.alert.dto.ExportAlertDefineDTO;
 import org.apache.hertzbeat.alert.service.impl.AlertDefineJsonImExportServiceImpl;
+import org.apache.hertzbeat.common.entity.alerter.AlertDefine;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.springframework.test.util.ReflectionTestUtils;
 
 /**
  * test case for {@link AlertDefineJsonImExportServiceImpl}
@@ -43,7 +47,7 @@ class AlertDefineJsonImExportServiceTest {
     @SuppressWarnings("checkstyle:OperatorWrap")
     private static final String JSON_DATA = "[{\"alertDefine\":{\"name\":\"App1\",\"type\":\"realtime\"," +
             "\"expr\":\"Expr1\",\"period\":3000,\"times\":3," +
-            "\"enable\":true,\"template\":\"Template1\"}}]";
+            "\"enable\":true,\"template\":\"Template1\",\"datasource\":\"promql\"}}]";
 
     private InputStream inputStream;
     private List<ExportAlertDefineDTO> alertDefineList;
@@ -77,6 +81,7 @@ void testParseImport() {
         assertEquals(1, result.size());
         assertEquals("App1", result.get(0).getAlertDefine().getName());
         assertEquals("realtime", result.get(0).getAlertDefine().getType());
+        assertEquals("promql", result.get(0).getAlertDefine().getDatasource());
     }
 
     @Test
@@ -100,6 +105,29 @@ void testWriteOs() {
         assertTrue(result.contains("realtime"));
     }
 
+    @Test
+    void testExportKeepsDatasource() {
+        AlertDefineService alertDefineService = mock(AlertDefineService.class);
+        AlertDefine define = AlertDefine.builder()
+                .name("test")
+                .type("periodic_metric")
+                .expr("cpu_usage{instance=\"server1\"} > 80")
+                .datasource("promql")
+                .period(300)
+                .times(3)
+                .template("test")
+                .enable(true)
+                .build();
+        when(alertDefineService.getAlertDefine(1L)).thenReturn(define);
+        ReflectionTestUtils.setField(service, "alertDefineService", alertDefineService);
+
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        service.exportConfig(outputStream, List.of(1L));
+
+        String result = outputStream.toString(StandardCharsets.UTF_8);
+        assertTrue(result.contains("promql"), "exported config should keep datasource, but got: " + result);
+    }
+
     @Test
     void testType() {
         assertEquals("JSON", service.type());

hertzbeat-alerter/src/test/java/org/apache/hertzbeat/alert/service/AlertDefineYamlImExportServiceTest.java

@@ -64,6 +64,7 @@ class AlertDefineYamlImExportServiceTest {
                         times: 3
                         enable: true
                         template: Template1
+                        datasource: promql
                     """;
 
     private InputStream inputStream;
@@ -82,6 +83,7 @@ public void setup() {
         alertDefine.setExpr("Expr1");
         alertDefine.setEnable(true);
         alertDefine.setTemplate("Template1");
+        alertDefine.setDatasource("promql");
 
         ExportAlertDefineDTO exportAlertDefine = new ExportAlertDefineDTO();
         exportAlertDefine.setAlertDefine(alertDefine);
@@ -135,6 +137,7 @@ void testWriteOs() {
         assertTrue(yamlOutput.contains("name: App1"));
         assertTrue(yamlOutput.contains("type: realtime"));
         assertTrue(yamlOutput.contains("expr: Expr1"));
+        assertTrue(yamlOutput.contains("datasource: promql"));
     }
 
     @Test