feat(dataset): 添加PDF文本提取功能支持

- 新增dataset模块路由配置 - 添加PdfTextExtractRequest和PdfTextExtractResponse数据传输对象 - 实现PDF文本提取接口，支持从PDF文件中提取文本内容 - 集成数据库会话管理和异步处理能力
2026-01-29 11:44:50 +08:00
parent 5eafcf0145
commit ab957ab53d
7 changed files with 198 additions and 52 deletions
--- a/backend/services/data-management-service/src/main/java/com/datamate/datamanagement/application/DatasetFileApplicationService.java
+++ b/backend/services/data-management-service/src/main/java/com/datamate/datamanagement/application/DatasetFileApplicationService.java
@@ -13,11 +13,12 @@ import com.datamate.common.infrastructure.exception.CommonErrorCode;
 import com.datamate.common.infrastructure.exception.SystemErrorCode;
 import com.datamate.common.interfaces.PagedResponse;
 import com.datamate.common.interfaces.PagingQuery;
-import com.datamate.datamanagement.common.enums.DuplicateMethod;
-import com.datamate.datamanagement.domain.contants.DatasetConstant;
-import com.datamate.datamanagement.domain.model.dataset.Dataset;
-import com.datamate.datamanagement.domain.model.dataset.DatasetFile;
-import com.datamate.datamanagement.domain.model.dataset.DatasetFileUploadCheckInfo;
+import com.datamate.datamanagement.common.enums.DuplicateMethod;
+import com.datamate.datamanagement.common.enums.DatasetType;
+import com.datamate.datamanagement.domain.contants.DatasetConstant;
+import com.datamate.datamanagement.domain.model.dataset.Dataset;
+import com.datamate.datamanagement.domain.model.dataset.DatasetFile;
+import com.datamate.datamanagement.domain.model.dataset.DatasetFileUploadCheckInfo;
 import com.datamate.datamanagement.infrastructure.exception.DataManagementErrorCode;
 import com.datamate.datamanagement.infrastructure.persistence.repository.DatasetFileRepository;
 import com.datamate.datamanagement.infrastructure.persistence.repository.DatasetRepository;
@@ -65,11 +66,13 @@ import java.util.stream.Stream;
@Slf4j
@Service
@Transactional
-public class DatasetFileApplicationService {
-
-    private final DatasetFileRepository datasetFileRepository;
-    private final DatasetRepository datasetRepository;
-    private final FileService fileService;
+public class DatasetFileApplicationService {
+    private static final String PDF_FILE_TYPE = "pdf";
+
+    private final DatasetFileRepository datasetFileRepository;
+    private final DatasetRepository datasetRepository;
+    private final FileService fileService;
+    private final PdfTextExtractAsyncService pdfTextExtractAsyncService;

    @Value("${datamate.data-management.base-path:/dataset}")
    private String datasetBasePath;
@@ -77,13 +80,16 @@ public class DatasetFileApplicationService {
    @Value("${datamate.data-management.file.duplicate:COVER}")
    private DuplicateMethod duplicateMethod;

-    @Autowired
-    public DatasetFileApplicationService(DatasetFileRepository datasetFileRepository,
-                                         DatasetRepository datasetRepository, FileService fileService) {
-        this.datasetFileRepository = datasetFileRepository;
-        this.datasetRepository = datasetRepository;
-        this.fileService = fileService;
-    }
+    @Autowired
+    public DatasetFileApplicationService(DatasetFileRepository datasetFileRepository,
+                                         DatasetRepository datasetRepository,
+                                         FileService fileService,
+                                         PdfTextExtractAsyncService pdfTextExtractAsyncService) {
+        this.datasetFileRepository = datasetFileRepository;
+        this.datasetRepository = datasetRepository;
+        this.fileService = fileService;
+        this.pdfTextExtractAsyncService = pdfTextExtractAsyncService;
+    }

    /**
     * 获取数据集文件列表
@@ -405,23 +411,24 @@ public class DatasetFileApplicationService {
        for (FileUploadResult file : unpacked) {
            File savedFile = file.getSavedFile();
            LocalDateTime currentTime = LocalDateTime.now();
-            DatasetFile datasetFile = DatasetFile.builder()
-                .id(UUID.randomUUID().toString())
-                .datasetId(datasetId)
-                .fileSize(savedFile.length())
+            DatasetFile datasetFile = DatasetFile.builder()
+                .id(UUID.randomUUID().toString())
+                .datasetId(datasetId)
+                .fileSize(savedFile.length())
                .uploadTime(currentTime)
                .lastAccessTime(currentTime)
                .fileName(file.getFileName())
                .filePath(savedFile.getPath())
                .fileType(AnalyzerUtils.getExtension(file.getFileName()))
                .build();
-            setDatasetFileId(datasetFile, dataset);
-            datasetFileRepository.saveOrUpdate(datasetFile);
-            dataset.addFile(datasetFile);
-        }
-        dataset.active();
-        datasetRepository.updateById(dataset);
-    }
+            setDatasetFileId(datasetFile, dataset);
+            datasetFileRepository.saveOrUpdate(datasetFile);
+            dataset.addFile(datasetFile);
+            triggerPdfTextExtraction(dataset, datasetFile);
+        }
+        dataset.active();
+        datasetRepository.updateById(dataset);
+    }

    /**
     * 在数据集下创建子目录
@@ -687,24 +694,29 @@ public class DatasetFileApplicationService {
            dataset.addFile(datasetFile);
            copiedFiles.add(datasetFile);
        }
-        datasetFileRepository.saveOrUpdateBatch(copiedFiles, 100);
-        dataset.active();
-        datasetRepository.updateById(dataset);
-        CompletableFuture.runAsync(() -> copyFilesToDatasetDir(req.sourcePaths(), dataset));
-        return copiedFiles;
+        datasetFileRepository.saveOrUpdateBatch(copiedFiles, 100);
+        dataset.active();
+        datasetRepository.updateById(dataset);
+        CompletableFuture.runAsync(() -> copyFilesToDatasetDir(req.sourcePaths(), dataset));
+        return copiedFiles;
    }

    private void copyFilesToDatasetDir(List<String> sourcePaths, Dataset dataset) {
        for (String sourcePath : sourcePaths) {
            Path sourceFilePath = Paths.get(sourcePath);
            Path targetFilePath = Paths.get(dataset.getPath(), sourceFilePath.getFileName().toString());
-            try {
-                Files.createDirectories(Path.of(dataset.getPath()));
-                Files.copy(sourceFilePath, targetFilePath);
-            } catch (IOException e) {
-                log.error("Failed to copy file from {} to {}", sourcePath, targetFilePath, e);
-            }
-        }
+            try {
+                Files.createDirectories(Path.of(dataset.getPath()));
+                Files.copy(sourceFilePath, targetFilePath);
+                DatasetFile datasetFile = datasetFileRepository.findByDatasetIdAndFileName(
+                    dataset.getId(),
+                    sourceFilePath.getFileName().toString()
+                );
+                triggerPdfTextExtraction(dataset, datasetFile);
+            } catch (IOException e) {
+                log.error("Failed to copy file from {} to {}", sourcePath, targetFilePath, e);
+            }
+        }
    }

    /**
@@ -750,15 +762,30 @@ public class DatasetFileApplicationService {
                .lastAccessTime(currentTime)
                .metadata(metadata)
                .build();
-            setDatasetFileId(datasetFile, dataset);
-            dataset.addFile(datasetFile);
-            addedFiles.add(datasetFile);
-        }
-        datasetFileRepository.saveOrUpdateBatch(addedFiles, 100);
-        dataset.active();
-        datasetRepository.updateById(dataset);
-        // Note: addFilesToDataset only creates DB records, no file system operations
-        // If file copy is needed, use copyFilesToDatasetDir endpoint instead
-        return addedFiles;
-    }
-}
+            setDatasetFileId(datasetFile, dataset);
+            dataset.addFile(datasetFile);
+            addedFiles.add(datasetFile);
+            triggerPdfTextExtraction(dataset, datasetFile);
+        }
+        datasetFileRepository.saveOrUpdateBatch(addedFiles, 100);
+        dataset.active();
+        datasetRepository.updateById(dataset);
+        // Note: addFilesToDataset only creates DB records, no file system operations
+        // If file copy is needed, use copyFilesToDatasetDir endpoint instead
+        return addedFiles;
+    }
+
+    private void triggerPdfTextExtraction(Dataset dataset, DatasetFile datasetFile) {
+        if (dataset == null || datasetFile == null) {
+            return;
+        }
+        if (dataset.getDatasetType() != DatasetType.TEXT) {
+            return;
+        }
+        String fileType = datasetFile.getFileType();
+        if (fileType == null || !fileType.equalsIgnoreCase(PDF_FILE_TYPE)) {
+            return;
+        }
+        pdfTextExtractAsyncService.extractPdfText(dataset.getId(), datasetFile.getId());
+    }
+}
--- a/backend/services/data-management-service/src/main/java/com/datamate/datamanagement/application/PdfTextExtractAsyncService.java
+++ b/backend/services/data-management-service/src/main/java/com/datamate/datamanagement/application/PdfTextExtractAsyncService.java
@@ -0,0 +1,54 @@
+package com.datamate.datamanagement.application;
+
+import com.datamate.common.infrastructure.common.Response;
+import com.datamate.datamanagement.infrastructure.client.PdfTextExtractClient;
+import com.datamate.datamanagement.infrastructure.client.dto.PdfTextExtractRequest;
+import com.datamate.datamanagement.infrastructure.client.dto.PdfTextExtractResponse;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+@Slf4j
+public class PdfTextExtractAsyncService {
+    private final PdfTextExtractClient pdfTextExtractClient;
+
+    @Async
+    public void extractPdfText(String datasetId, String fileId) {
+        try {
+            Response<PdfTextExtractResponse> response = pdfTextExtractClient.extractPdfText(
+                new PdfTextExtractRequest(datasetId, fileId)
+            );
+            if (response == null) {
+                log.warn("PdfTextExtract returned null response, datasetId={}, fileId={}", datasetId, fileId);
+                return;
+            }
+            String code = response.getCode();
+            if (!"0".equals(code) && !"200".equals(code)) {
+                log.warn(
+                    "PdfTextExtract failed, datasetId={}, fileId={}, code={}, message={}",
+                    datasetId,
+                    fileId,
+                    code,
+                    response.getMessage()
+                );
+                return;
+            }
+            PdfTextExtractResponse data = response.getData();
+            if (data != null) {
+                log.info(
+                    "PdfTextExtract succeeded, datasetId={}, fileId={}, textFileId={}",
+                    datasetId,
+                    fileId,
+                    data.getTextFileId()
+                );
+            } else {
+                log.info("PdfTextExtract succeeded, datasetId={}, fileId={}", datasetId, fileId);
+            }
+        } catch (Exception e) {
+            log.error("PdfTextExtract call failed, datasetId={}, fileId={}", datasetId, fileId, e);
+        }
+    }
+}
--- a/backend/services/data-management-service/src/main/java/com/datamate/datamanagement/infrastructure/client/PdfTextExtractClient.java
+++ b/backend/services/data-management-service/src/main/java/com/datamate/datamanagement/infrastructure/client/PdfTextExtractClient.java
@@ -0,0 +1,15 @@
+package com.datamate.datamanagement.infrastructure.client;
+
+import com.datamate.common.infrastructure.common.Response;
+import com.datamate.datamanagement.infrastructure.client.dto.PdfTextExtractRequest;
+import com.datamate.datamanagement.infrastructure.client.dto.PdfTextExtractResponse;
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+
+@FeignClient(name = "pdf-text-extract-service", url = "${pdf.text.extract.service.url:http://datamate-backend-python:18000}")
+public interface PdfTextExtractClient {
+
+    @PostMapping("/api/dataset/pdf-text-extract")
+    Response<PdfTextExtractResponse> extractPdfText(@RequestBody PdfTextExtractRequest request);
+}
--- a/backend/services/data-management-service/src/main/java/com/datamate/datamanagement/infrastructure/client/dto/PdfTextExtractRequest.java
+++ b/backend/services/data-management-service/src/main/java/com/datamate/datamanagement/infrastructure/client/dto/PdfTextExtractRequest.java
@@ -0,0 +1,13 @@
+package com.datamate.datamanagement.infrastructure.client.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class PdfTextExtractRequest {
+    private String datasetId;
+    private String fileId;
+}
--- a/backend/services/data-management-service/src/main/java/com/datamate/datamanagement/infrastructure/client/dto/PdfTextExtractResponse.java
+++ b/backend/services/data-management-service/src/main/java/com/datamate/datamanagement/infrastructure/client/dto/PdfTextExtractResponse.java
@@ -0,0 +1,13 @@
+package com.datamate.datamanagement.infrastructure.client.dto;
+
+import lombok.Data;
+
+@Data
+public class PdfTextExtractResponse {
+    private String datasetId;
+    private String sourceFileId;
+    private String textFileId;
+    private String textFileName;
+    private String textFilePath;
+    private Long textFileSize;
+}