vfs

ABP虚拟文件系统(VirtualFileSystem)实例------定制菜单栏显示用户姓名

て烟熏妆下的殇ゞ 提交于 2019-11-29 01:51:21
ABP默认的MVC启动模板在登录后, 右上角显示的是用户名: 如果想让它显示用户的姓名该如何做呢?这就需要用到ABP一个非常强大的功能------虚拟文件系统. 前期准备 使用 ABP CLI 创建一个名为 AbpStudy 的ASP.NET MVC项目: abp new AbpStudy 关于MVC的启动模板可以看 文档 , 这里就不赘述. 虚拟文件系统(VirtualFileSystem) 什么是虚拟文件系统(简称VFS)呢?来看一段 官方文档 的解释: 虚拟文件系统可以管理文件系统(磁盘)上实际不存在的文件。 它主要用于将(js,css,image,cshtml ...)文件嵌入到程序集中,并在运行时将它们用作物理文件。 是不是还是不太明白VFS有什么用, 没关系我第一次看完也是这样:) 我们首先要知道, ABP是一个模块化的框架, 每个模块都可以互相协作参与到整个应用程序中, 定制应用程序的各个部分, 包括UI部分 . 每个模块都可以有自己的UI, 比如我有一个"人事管理"模块, 它要向菜单中增加一个名为"人事管理"的菜单入口;而另一个模块"财务管理"则需要增加一个"财务管理"的菜单入口------在不修改你的应用程序的前提下要把它们整合在一起,这是一个很难的事,ABP的前身ASP.NET BOILERPLATE未能实现这点, 而这一切在ABP中成为了可能. 而除了整合以外

Exposing SQL Server database objects as files in a file system

China☆狼群 提交于 2019-11-28 10:33:55
There's more than one file system Most version control tools operate on the local disk file system. Database objects for most relational database systems do exist in a file system, inasmuch as there is a textual name identifying the object and the creation script can be retrieved or at least generated using this name. But it isn't the local disk file system, and as a result they are invisible to tools like CVS or SVN, which operate strictly on the local disk file system. In order for SVN to be applied to database objects, they must be replicated into the local disk file system, and changes to

Is rename() atomic?

与世无争的帅哥 提交于 2019-11-27 04:28:10
I am not being able to check this via experiments and could not gather it from the man pages as well. Say I have two processes, one moving(rename) file1 from directory1 to directory2. Say the other process running concurrently copies the contents of directory1 and directory2 to another location. Is it possible that the copy happens in such a way that both directory1 and directory2 will show file1 - i.e directory1 is copied before the move and directory2 after the move by the first process. Basically is rename() is an atomic system call? Thanks Yes and no. rename() is atomic assuming the OS

Exposing SQL Server database objects as files in a file system

丶灬走出姿态 提交于 2019-11-27 03:39:30
问题 There's more than one file system Most version control tools operate on the local disk file system. Database objects for most relational database systems do exist in a file system, inasmuch as there is a textual name identifying the object and the creation script can be retrieved or at least generated using this name. But it isn't the local disk file system, and as a result they are invisible to tools like CVS or SVN, which operate strictly on the local disk file system. In order for SVN to

Find size and free space of the filesystem containing a given file

一笑奈何 提交于 2019-11-26 15:11:31
I'm using Python 2.6 on Linux. What is the fastest way: to determine which partition contains a given directory or file? For example, suppose that /dev/sda2 is mounted on /home , and /dev/mapper/foo is mounted on /home/foo . From the string "/home/foo/bar/baz" I would like to recover the pair ("/dev/mapper/foo", "home/foo") . and then, to get usage statistics of the given partition? For example, given /dev/mapper/foo I would like to obtain the size of the partition and the free space available (either in bytes or approximately in megabytes). If you just need the free space on a device, see the

Is rename() atomic?

生来就可爱ヽ(ⅴ<●) 提交于 2019-11-26 11:10:51
问题 I am not being able to check this via experiments and could not gather it from the man pages as well. Say I have two processes, one moving(rename) file1 from directory1 to directory2. Say the other process running concurrently copies the contents of directory1 and directory2 to another location. Is it possible that the copy happens in such a way that both directory1 and directory2 will show file1 - i.e directory1 is copied before the move and directory2 after the move by the first process.

Find size and free space of the filesystem containing a given file

不打扰是莪最后的温柔 提交于 2019-11-26 04:39:58
问题 I\'m using Python 2.6 on Linux. What is the fastest way: to determine which partition contains a given directory or file? For example, suppose that /dev/sda2 is mounted on /home , and /dev/mapper/foo is mounted on /home/foo . From the string \"/home/foo/bar/baz\" I would like to recover the pair (\"/dev/mapper/foo\", \"home/foo\") . and then, to get usage statistics of the given partition? For example, given /dev/mapper/foo I would like to obtain the size of the partition and the free space