FileConvertQueueTask.java
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package cn.keking.service;
import cn.keking.model.FileAttribute;
import cn.keking.model.FileType;
import cn.keking.service.cache.CacheService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
import org.springframework.ui.ExtendedModelMap;
import javax.annotation.PostConstruct;
import java.util.concurrent.TimeUnit;
/**
* Created by kl on 2018/1/19.
* Content :消费队列中的转换文件
*/
@Service
public class FileConvertQueueTask {
private final Logger logger = LoggerFactory.getLogger(getClass());
private final FilePreviewFactory previewFactory;
private final CacheService cacheService;
private final FileHandlerService fileHandlerService;
public FileConvertQueueTask(FilePreviewFactory previewFactory, CacheService cacheService, FileHandlerService fileHandlerService) {
this.previewFactory = previewFactory;
this.cacheService = cacheService;
this.fileHandlerService = fileHandlerService;
}
@PostConstruct
public void startTask() {
new Thread(new ConvertTask(previewFactory, cacheService, fileHandlerService))
.start();
logger.info("队列处理文件转换任务启动完成 ");
}
static class ConvertTask implements Runnable {
private final Logger logger = LoggerFactory.getLogger(ConvertTask.class);
private final FilePreviewFactory previewFactory;
private final CacheService cacheService;
private final FileHandlerService fileHandlerService;
public ConvertTask(FilePreviewFactory previewFactory,
CacheService cacheService,
FileHandlerService fileHandlerService) {
this.previewFactory = previewFactory;
this.cacheService = cacheService;
this.fileHandlerService = fileHandlerService;
}
@Override
public void run() {
while (true) {
String url = null;
try {
url = cacheService.takeQueueTask();
if (url != null) {
FileAttribute fileAttribute = fileHandlerService.getFileAttribute(url, null);
FileType fileType = fileAttribute.getType();
logger.info("正在处理预览转换任务，url：{}，预览类型：{}", url, fileType);
if (isNeedConvert(fileType)) {
FilePreview filePreview = previewFactory.get(fileAttribute);
filePreview.filePreviewHandle(url, new ExtendedModelMap(), fileAttribute);
} else {
logger.info("预览类型无需处理，url：{}，预览类型：{}", url, fileType);
}
}
} catch (Exception e) {
try {
TimeUnit.SECONDS.sleep(10);
} catch (Exception ex) {
Thread.currentThread().interrupt();
ex.printStackTrace();
}
logger.info("处理预览转换任务异常，url：{}", url, e);
}
}
}
public boolean isNeedConvert(FileType fileType) {
return fileType.equals(FileType.COMPRESS) || fileType.equals(FileType.OFFICE) || fileType.equals(FileType.CAD);
}
}
}