异步文件中心

真相只有一个 lv.1

发布时间：2023-05-07 18:12:46 201

相关标签： # java# spring# java# json# 监控

异步Servlet 和disruptor的融合构建文件中心

异步文件中心_java

通过请求异步化带来其他明显优点：

可以处理更高并发连接数，提高系统整体吞吐量
请求解析与业务处理完全分离，职责单一
自定义业务线程池，我们可以更容易对其监控，降级等处理
可以根据不同业务，自定义不同线程池，相互隔离，不用互相影响

所以具体使用过程，我们还需要进行的相应的压测，观察响应时间以及吞吐量等其他指标，综合选择。

异步文件中心_异步文件中心_02

1.构建文件上传下载事件处理类

上传处理类

package com.open.capacity.file.event;

import java.util.List;

import org.springframework.web.multipart.MultipartFile;

import com.open.capacity.common.disruptor.event.BaseEvent;
import com.open.capacity.file.constant.FileType;

import lombok.Builder;
import lombok.Data;

@Data
@Builder
public class UploadEvent extends BaseEvent {
  
  /**
   * 文件存储
   */
  private FileType fileType ;
  
  /**
   * 单个批量上传
   */
  private String commandType ;
  
  /**
   * 租户
   */
  private String tenant ;
  
  /**
   * 分片ID
   */
  private String guid ;
  
  /**
   * 当前分片
   */
  private Integer chunk ;
  
  /**
   * 总分片
   */
  private Integer chunks ;
  
  /**
   * 文件
   */
  private List  files;

}

下载处理类

package com.open.capacity.file.event;

import com.open.capacity.common.disruptor.event.BaseEvent;
import com.open.capacity.file.constant.FileType;

import lombok.Builder;
import lombok.Data;

@Data
@Builder
public class DownloadEvent extends BaseEvent {
  
  /**
   * 文件存储
   */
  private FileType fileType ;
  
  /**
   * 单个批量上传
   */
  private String commandType ;
  /**
   * 租户
   */
  private String tenant ;
  
  /**
   * 文件
   */
  private String fileId ;
 

}

2.文件上传之核心接口

package com.open.capacity.file.controller;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.Assert;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import com.beust.jcommander.internal.Lists;
import com.open.capacity.common.context.TenantContextHolder;
import com.open.capacity.common.disruptor.DisruptorTemplate;
import com.open.capacity.common.dto.PageResult;
import com.open.capacity.common.dto.ResponseEntity;
import com.open.capacity.common.exception.BusinessException;
import com.open.capacity.file.constant.CommandType;
import com.open.capacity.file.constant.FileType;
import com.open.capacity.file.context.UploadContext;
import com.open.capacity.file.entity.FileInfo;
import com.open.capacity.file.entity.MergeFileDTO;
import com.open.capacity.file.event.DownloadEvent;
import com.open.capacity.file.event.UploadEvent;
import com.open.capacity.file.service.FileServiceFactory;
import com.open.capacity.file.utils.FileUtil;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.vavr.control.Try;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;

@RestController
@Api(tags = "文件模块api")
@Slf4j
@RequestMapping("/file")
public class FileController {

  @Resource
  private FileServiceFactory fileServiceFactory;

  @Autowired
  private DisruptorTemplate disruptorTemplate;

  @ApiOperation("文件上传")
  @PostMapping(value = "/files-anon")
  @SneakyThrows
  public void filesAnon(@RequestParam("file") MultipartFile file, HttpServletRequest request) {

    Assert.isTrue(file != null, "No files");
    UploadContext context = new UploadContext();
    javax.servlet.AsyncContext asyncContext = request.startAsync();
    asyncContext.setTimeout(900000);
    context.setAsyncContext(asyncContext);
    List files = Lists.newArrayList();
    files.add(FileUtil.createFileItem(file));
    UploadEvent event = UploadEvent.builder().tenant(TenantContextHolder.getTenant()).fileType(FileType.S3)
        .commandType(CommandType.UPLOAD).files(files).build();
    disruptorTemplate.publish(CommandType.UPLOAD, event, context);
  }

  @ApiOperation("批量上传文件上传")
  @PostMapping(value = "/upload", consumes = "multipart/form-data", produces = { "application/json" })
  @SneakyThrows
  public void filesAnon(@RequestParam("files") List files, HttpServletRequest request) {

    Assert.isTrue(files != null, "No files");
    UploadContext context = new UploadContext();
    javax.servlet.AsyncContext asyncContext = request.startAsync();
    asyncContext.setTimeout(900000);
    context.setAsyncContext(asyncContext);
    UploadEvent event = UploadEvent.builder().tenant(TenantContextHolder.getTenant()).fileType(FileType.S3)
        .commandType(CommandType.BATCH_UPLOAD)
        .files(files.stream().map(file -> FileUtil.createFileItem(file)).collect(Collectors.toList())).build();
    disruptorTemplate.publish(CommandType.BATCH_UPLOAD, event, context);
  }

  /**
   * 上传大文件
   * 
   * @param file
   * @param chunks
   */
  @PostMapping(value = "/files-anon/bigFile")
  public void bigFile(String guid, Integer chunk, MultipartFile file, Integer chunks, HttpServletRequest request) {

    Assert.isTrue(file != null, "No files");
    UploadContext context = new UploadContext();
    javax.servlet.AsyncContext asyncContext = request.startAsync();
    asyncContext.setTimeout(900000);
    context.setAsyncContext(asyncContext);
    List files = Lists.newArrayList();
    files.add(FileUtil.createFileItem(file));
    UploadEvent event = UploadEvent.builder().tenant(TenantContextHolder.getTenant()).fileType(FileType.S3)
        .commandType(CommandType.PART_UPLOAD).files(files).chunk(chunk).chunks(chunks).guid(guid).build();
    disruptorTemplate.publish(CommandType.PART_UPLOAD, event, context);
  }

  /**
   * 合并文件
   * 
   * @param mergeFileDTO
   */
  @RequestMapping(value = "/files-anon/merge", method = RequestMethod.POST)
  public ResponseEntity mergeFile(@RequestBody MergeFileDTO mergeFileDTO) {
    try {

      String filepath = new SimpleDateFormat("yyyy/MM/dd/").format(new Date());
      return ResponseEntity.succeed(fileServiceFactory.getService(FileType.S3).merge(mergeFileDTO.getGuid(),
          mergeFileDTO.getFileName(), filepath), "操作成功");
    } catch (Exception ex) {
      return ResponseEntity.failed("操作失败");
    }
  }

  @GetMapping("/download")
  public void downloadFile(@RequestParam String id, HttpServletRequest request) {

    Assert.isTrue(id != null, "No files");
    UploadContext context = new UploadContext();
    javax.servlet.AsyncContext asyncContext = request.startAsync();
    asyncContext.setTimeout(900000);
    context.setAsyncContext(asyncContext);
    DownloadEvent event = DownloadEvent.builder().tenant(TenantContextHolder.getTenant()).fileType(FileType.S3)
        .commandType(CommandType.DOWNLOAD).fileId(id).build();
    disruptorTemplate.publish(CommandType.DOWNLOAD, event, context);

  }

  /**
   * 文件查询
   *
   * @param params
   * @return
   */
  @GetMapping("/files")
  public PageResult findFiles(@RequestParam Map params) {
    return fileServiceFactory.getService(FileType.S3).findList(params);
  }

  /**
   * 文件删除
   *
   * @param id
   */
  @DeleteMapping("/{id}")
  public ResponseEntity delete(@PathVariable Long id) {

    Try.of(() -> fileServiceFactory.getService(FileType.S3).delete(id))
        .onFailure(ex -> log.error("file-delete-error", ex))
        .getOrElseThrow(item -> new BusinessException("操作失败"));

    return ResponseEntity.succeed("操作成功");

  }

  /**
   * 上传失败
   * 
   * @param mergeFileDTO
   * @return
   */
  @RequestMapping(value = "/files-anon/uploadError", method = RequestMethod.POST)
  public ResponseEntity uploadError(@RequestBody MergeFileDTO mergeFileDTO) {
    try {
      // 使用默认的 FileService
      fileServiceFactory.getService(FileType.S3).uploadError(mergeFileDTO.getGuid(), mergeFileDTO.getFileName(),
          "");
      return ResponseEntity.succeed("操作成功");
    } catch (Exception ex) {
      return ResponseEntity.failed("操作失败");
    }
  }

}

3.核心事件驱动处理类

1.单文件上传

package com.open.capacity.file.event.lisener;

import java.io.IOException;
import java.nio.charset.StandardCharsets;

import javax.annotation.Resource;
import javax.servlet.ServletOutputStream;
import javax.servlet.ServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.open.capacity.common.context.TenantContextHolder;
import com.open.capacity.common.disruptor.annocation.Channel;
import com.open.capacity.common.disruptor.event.BaseEvent;
import com.open.capacity.common.disruptor.listener.EventListener;
import com.open.capacity.common.disruptor.thread.ExecutorService;
import com.open.capacity.common.exception.BusinessException;
import com.open.capacity.file.constant.CommandType;
import com.open.capacity.file.context.UploadContext;
import com.open.capacity.file.entity.FileInfo;
import com.open.capacity.file.event.UploadEvent;
import com.open.capacity.file.service.FileServiceFactory;

import cn.hutool.core.io.IoUtil;
import lombok.SneakyThrows;

@Service
@Channel(CommandType.UPLOAD)
public class UploadEventLisener extends EventListener {

  @Resource
  private FileServiceFactory fileServiceFactory;

  @Resource
  private ObjectMapper objectMapper;

  @Override
  public boolean accept(BaseEvent event) {

    UploadEvent uploadEvent = (UploadEvent) event;

    // s3 单个文件上传
    if (CommandType.UPLOAD.equals(uploadEvent.getCommandType())) {
      return true;
    }
    return false;
  }

  @Override
  @SneakyThrows
  public void onEvent(UploadEvent event, UploadContext eventContext) {

    executorService.execute(CommandType.UPLOAD, () -> {
      ServletResponse response = eventContext.getAsyncContext().getResponse();
      response.setCharacterEncoding("UTF-8");
      response.setContentType("application/json;charset=UTF-8");
      try (ServletOutputStream out = response.getOutputStream()) {
        TenantContextHolder.setTenant(event.getTenant());
        MultipartFile file = event.getFiles().get(0);
        FileInfo fileInfo = fileServiceFactory.getService(event.getFileType()).upload(file);
        IoUtil.write(out, false,objectMapper.writeValueAsString(fileInfo).getBytes(StandardCharsets.UTF_8));
      } catch (IOException e) {
        throw new BusinessException(e.getMessage());
      } finally {
        eventContext.getAsyncContext().complete();
      }
    });
  }

}

2.批量文件上传

package com.open.capacity.file.event.lisener;

import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.List;

import javax.annotation.Resource;
import javax.servlet.ServletOutputStream;
import javax.servlet.ServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import com.beust.jcommander.internal.Lists;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.open.capacity.common.context.TenantContextHolder;
import com.open.capacity.common.disruptor.annocation.Channel;
import com.open.capacity.common.disruptor.event.BaseEvent;
import com.open.capacity.common.disruptor.listener.EventListener;
import com.open.capacity.common.disruptor.thread.ExecutorService;
import com.open.capacity.common.exception.BusinessException;
import com.open.capacity.file.constant.CommandType;
import com.open.capacity.file.context.UploadContext;
import com.open.capacity.file.entity.FileInfo;
import com.open.capacity.file.event.UploadEvent;
import com.open.capacity.file.service.FileServiceFactory;

import lombok.SneakyThrows;

@Service
@Channel(CommandType.BATCH_UPLOAD)
public class BatchUploadEventLisener extends EventListener {

  @Resource
  private FileServiceFactory fileServiceFactory;

  @Resource
  private ObjectMapper objectMapper;

  @Override
  public boolean accept(BaseEvent event) {

    UploadEvent uploadEvent = (UploadEvent) event;
    // s3 批量个文件上传
    if (CommandType.BATCH_UPLOAD.equals(uploadEvent.getCommandType())) {
      return true;
    }
    return false;
  }

  @Override
  @SneakyThrows
  public void onEvent(UploadEvent event, UploadContext eventContext) {
    executorService.execute(CommandType.BATCH_UPLOAD ,()-> {
      ServletResponse response = eventContext.getAsyncContext().getResponse();
      response.setCharacterEncoding("UTF-8");
      response.setContentType("application/json;charset=UTF-8");
      try (ServletOutputStream out = response.getOutputStream()) {
        TenantContextHolder.setTenant(event.getTenant());
        List fileInfos = Lists.newArrayList();
        for (MultipartFile file : event.getFiles()) {
          FileInfo fileInfo = fileServiceFactory.getService(event.getFileType()).upload(file);
          fileInfos.add(fileInfo);
        }
        out.write(objectMapper.writeValueAsString(fileInfos).getBytes(StandardCharsets.UTF_8));
        out.flush();
      } catch (IOException e) {
        throw new BusinessException(e.getMessage());
      } finally {
        eventContext.getAsyncContext().complete();
      }
    });
    
  }

}

3.s3协议分片上传

package com.open.capacity.file.event.lisener;

import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.annotation.Resource;
import javax.servlet.ServletOutputStream;
import javax.servlet.ServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.open.capacity.common.context.TenantContextHolder;
import com.open.capacity.common.disruptor.annocation.Channel;
import com.open.capacity.common.disruptor.event.BaseEvent;
import com.open.capacity.common.disruptor.listener.EventListener;
import com.open.capacity.common.disruptor.thread.ExecutorService;
import com.open.capacity.common.dto.ResponseEntity;
import com.open.capacity.common.exception.BusinessException;
import com.open.capacity.file.constant.CommandType;
import com.open.capacity.file.context.UploadContext;
import com.open.capacity.file.entity.FileInfo;
import com.open.capacity.file.event.UploadEvent;
import com.open.capacity.file.service.FileServiceFactory;

import cn.hutool.core.io.IoUtil;
import lombok.Cleanup;
import lombok.SneakyThrows;

@Service
@Channel(CommandType.PART_UPLOAD)
public class PartUploadEventLisener extends EventListener {

  @Resource
  private FileServiceFactory fileServiceFactory;

  @Resource
  private ObjectMapper objectMapper;

  @Override
  public boolean accept(BaseEvent event) {

    UploadEvent uploadEvent = (UploadEvent) event;

    // s3 单个文件分片上传
    if (CommandType.PART_UPLOAD.equals(uploadEvent.getCommandType())) {
      return true;
    }
    return false;
  }

  @Override
  @SneakyThrows
  public void onEvent(UploadEvent event, UploadContext eventContext) {
    String ok = objectMapper.writeValueAsString(ResponseEntity.succeed("操作成功"));
    String ko = objectMapper.writeValueAsString(ResponseEntity.succeed("操作失败"));
    executorService.execute(CommandType.PART_UPLOAD, () -> {
      ServletResponse response = eventContext.getAsyncContext().getResponse();
      response.setCharacterEncoding("UTF-8");
      response.setContentType("application/json;charset=UTF-8");
      ServletOutputStream out = null;
      try {
        out = response.getOutputStream();
        TenantContextHolder.setTenant(event.getTenant());
        MultipartFile file = event.getFiles().get(0);
        String filepath = new SimpleDateFormat("yyyy/MM/dd/").format(new Date());
        fileServiceFactory.getService(event.getFileType()).chunk(event.getGuid(), event.getChunk(), file,
            event.getChunks(), filepath);
        IoUtil.write(out, false, ok.getBytes(StandardCharsets.UTF_8));
      } catch (Exception e1) {
        IoUtil.write(out, false, ko.getBytes(StandardCharsets.UTF_8));
      } finally {
        IoUtil.close(out);
        eventContext.getAsyncContext().complete();
      }
    });
  }

}

4.文件下载

package com.open.capacity.file.event.lisener;

import java.io.IOException;

import javax.annotation.Resource;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;

import org.jboss.marshalling.ByteInputStream;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.io.ByteArrayResource;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Service;
import org.springframework.web.util.UriUtils;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.open.capacity.common.context.TenantContextHolder;
import com.open.capacity.common.disruptor.annocation.Channel;
import com.open.capacity.common.disruptor.event.BaseEvent;
import com.open.capacity.common.disruptor.listener.EventListener;
import com.open.capacity.common.disruptor.thread.ExecutorService;
import com.open.capacity.common.exception.BusinessException;
import com.open.capacity.file.constant.CommandType;
import com.open.capacity.file.constant.FileType;
import com.open.capacity.file.context.UploadContext;
import com.open.capacity.file.entity.DownloadDto;
import com.open.capacity.file.event.DownloadEvent;
import com.open.capacity.file.service.FileServiceFactory;

import cn.hutool.core.io.IoUtil;
import cn.hutool.core.util.URLUtil;
import lombok.SneakyThrows;

@Service
@Channel(CommandType.DOWNLOAD)
public class DownloadEventLisener extends EventListener {

  @Resource
  private FileServiceFactory fileServiceFactory;
  
  @Resource
  private ObjectMapper objectMapper;

  @Override
  public boolean accept(BaseEvent event) {

    DownloadEvent uploadEvent = (DownloadEvent) event;

    // s3 单个文件下载
    if (CommandType.DOWNLOAD.equals(uploadEvent.getCommandType())) {
      return true;
    }
    return false;
  }

  @Override
  @SneakyThrows
  public void onEvent(DownloadEvent event, UploadContext eventContext) {
    
    executorService.execute(CommandType.DOWNLOAD ,()-> {
      HttpServletResponse response = (HttpServletResponse) eventContext.getAsyncContext().getResponse();
      response.setCharacterEncoding("UTF-8");
      response.setContentType("application/json;charset=UTF-8");
      try (ServletOutputStream out = response.getOutputStream()) {
        TenantContextHolder.setTenant(event.getTenant());
        DownloadDto downloadInfo = fileServiceFactory.getService(FileType.S3).download(event.getFileId());
        response.setCharacterEncoding("UTF-8");
        response.setHeader(HttpHeaders.CONTENT_DISPOSITION,
            "attachment;fileName=" + URLUtil.encode(downloadInfo.getFileName()));
        response.setContentType(MediaType.MULTIPART_FORM_DATA_VALUE);
        response.setHeader(HttpHeaders.ACCESS_CONTROL_EXPOSE_HEADERS, "Content-Disposition,Content-Length");
        IoUtil.write(out, false, downloadInfo.getBytes());
        out.flush();
      } catch (IOException e) {
        throw new BusinessException(e.getMessage());
      } finally {
        eventContext.getAsyncContext().complete();
      }
    });
    

  }

}

项目地址：

https://github.com/owenwangwen/open-capacity-platform

文章来源： https://blog.51cto.com/u_13005375/5984275

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