先保存下载任务再下发节点以保留即时状态

src/main/java/com/lion/lionwebsite/Dao/normal/CustomConfigurationMapper.java

@@ -16,6 +16,9 @@ public interface CustomConfigurationMapper {
 //    @Delete("delete from customConfiguration where parameter=#{parameter}")
 //    void deleteConfiguration(CustomConfiguration configuration);
 
+    @Update("update customConfiguration set value=cast(value as integer)+#{amount} where parameter=#{parameter}")
+    void incrementConfiguration(@Param("parameter") String parameter, @Param("amount") long amount);
+
     @Select("select * from customConfiguration where parameter=#{parameter}")
     CustomConfiguration selectConfiguration(String parameter);
 }

src/main/java/com/lion/lionwebsite/Service/GalleryManageService.java

@@ -93,9 +93,14 @@ public class GalleryManageService {
             } else {
                 taskName = gallery.getName();
                 log.info("创建任务: {} 目标分辨率：{}", link, targetResolution);
+                // Persist before dispatch: the node sends its current status before its ACK.
+                gallery.setDownloader(user.getId());
+                gallery.set_download(true);
+                galleryMapper.insertGallery(gallery);
+                configurationMapper.incrementConfiguration(CustomConfiguration.WEEK_USED_AMOUNT, gallery.getFileSize());
                 if (remoteService.addGalleryToQueue(gallery) != 0) {
                     log.error("传送任务{}失败, 未知原因", gallery.getName());
-                    response.failure("任务传送失败，未知原因，尝试点击重连按钮看看");
+                    response.failure("任务已保存，但节点未确认接收；请刷新任务列表后重试");
                     pushService.taskCreateReport(user.getUsername(), taskName, response);
                     return response.toJSONString();
                 }
@@ -111,20 +116,9 @@ public class GalleryManageService {
             return response.toJSONString();
         }
 
-        //处理下载结果，将任务插入数据库并且更新每周用量
-        if (gallery.getStatus().equals("已提交")) {
-            response.success(gallery.toString());
-            gallery.setDownloader(user.getId());
-            gallery.set_download(true);
-            galleryMapper.insertGallery(gallery);
-
-            long usedAmount = Long.parseLong(configurationMapper.selectConfiguration(CustomConfiguration.WEEK_USED_AMOUNT).getValue());
-            usedAmount += gallery.getFileSize();
-            configurationMapper.updateConfiguration(CustomConfiguration.WEEK_USED_AMOUNT, String.valueOf(usedAmount));
-        } else {
-            response.failure("提交失败，未知原因");
-            galleryMapper.deleteGalleryByGid(gallery.getGid());
-        }
+        // Do not overwrite an immediate node status with the original submitted state.
+        Gallery current = galleryMapper.selectGalleryByGid(gallery.getGid());
+        response.success((current == null ? gallery : current).toString());
         pushService.taskCreateReport(user.getUsername(), taskName, response);
 
         return response.toJSONString();

src/test/java/com/lion/lionwebsite/Service/GallerySubmissionTest.java

@@ -0,0 +1,57 @@
+package com.lion.lionwebsite.Service;
+
+import com.lion.lionwebsite.Dao.normal.*;
+import com.lion.lionwebsite.Dao.cache.ImageCacheMapper;
+import com.lion.lionwebsite.Domain.*;
+import com.lion.lionwebsite.Util.GalleryUtil;
+import org.junit.jupiter.api.Test;
+import java.util.concurrent.atomic.AtomicReference;
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+class GallerySubmissionTest {
+    @Test
+    void immediateCompletionSeesPersistedTask() throws Exception {
+        checkSubmission((byte) 0);
+    }
+
+    @Test
+    void timeoutRetainsTaskForRetry() throws Exception {
+        checkSubmission((byte) -1);
+    }
+
+    private void checkSubmission(byte ack) throws Exception {
+        GalleryMapper galleries = mock(GalleryMapper.class);
+        UserMapper users = mock(UserMapper.class);
+        RemoteService remote = mock(RemoteService.class);
+        CustomConfigurationMapper configuration = mock(CustomConfigurationMapper.class);
+        GalleryManageService service = new GalleryManageService(galleries, mock(CollectMapper.class), configuration,
+                users, mock(ShareFileMapper.class), mock(ImageCacheMapper.class), remote, mock(PushService.class));
+        User user = new User();
+        user.setId(7);
+        user.setUsername("test");
+        when(users.selectUserByAuthCode("test")).thenReturn(user);
+        AtomicReference<Gallery> saved = new AtomicReference<>();
+        when(galleries.selectGalleryByGid(123)).thenAnswer(call -> saved.get());
+        doAnswer(call -> { saved.set(call.getArgument(0)); return null; }).when(galleries).insertGallery(any());
+        Gallery gallery = new Gallery();
+        gallery.setGid(123);
+        gallery.setName("sample [123]");
+        gallery.setStatus("已提交");
+        when(remote.addGalleryToQueue(any())).thenAnswer(call -> {
+            assertNotNull(saved.get(), "node status must find a persisted record");
+            assertEquals(7, saved.get().getDownloader());
+            if (ack == 0) saved.get().setStatus("下载完成");
+            return ack;
+        });
+        try (var parser = mockStatic(GalleryUtil.class)) {
+            parser.when(() -> GalleryUtil.parse("https://example.org/g/123/key/", true, "original")).thenReturn(gallery);
+            String response = service.createTask("https://example.org/g/123/key/", "original", "test");
+            assertNotNull(saved.get());
+            assertTrue(response.contains(ack == 0 ? "success" : "任务已保存"));
+            assertEquals(ack == 0 ? "下载完成" : "已提交", saved.get().getStatus());
+            verify(galleries, never()).deleteGalleryByGid(any());
+            verify(galleries, times(1)).insertGallery(gallery);
+        }
+    }
+}