@Override
public boolean fetch(OutputStream out, String filename) throws IOException {
MetaFile metaFile = hdfsfilesRepository.getMetaFile(filename);
SocketStream.writeInteger(metaFile.getLength().intValue(), out);
HdfsHelper.fetch(out, metaFile.getStorename());
return true;
}
@Override
public boolean delete(String filename) throws IOException {
MetaFile metaFile = hdfsfilesRepository.getMetaFile(filename);
HdfsHelper.delete(metaFile.getStorename(), false);
// 删除元数据
hdfsfilesRepository.delMetaFile(filename);
return true;
}
@Override
public void save(InputStream is, int filelen, String filename) throws IOException {
String md5filename = DigestUtils.md5Hex(filename);
String hdfsname = basepath + md5filename;
// 存储到HDFS上
try {
HdfsHelper.upload(is, filelen, hdfsname);
} catch (IOException e) {
logger.error(e);
throw e;
}
// 添加元数据项
// TODO: 大文件计划不保存元数据
MetaFile metaFile = new MetaFile();
metaFile.setLength(new Long(filelen));
metaFile.setName(new File(filename).getName());
metaFile.setStorename(md5filename);
metaFile.setStorepos(-1L);
hdfsfilesRepository.addMetaFile(filename, metaFile);
}