Nebula2探秘02-使用FileServer2

王朝other·作者佚名 2007-05-17

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Nebula2探秘01-创建KernelServer&使用log

happykevins文

/**//****************************************************************************/

/**//* Nebula2 - Tutorial 02 */

/**//* 使用FileServer2 */

/**//* author: happykevins */

/**//****************************************************************************/

/**////----------------------------------------------------------------------------

/// +必要头文件

#include "kernel/nkernelserver.h"

#include "kernel/nfileserver2.h"

#include "kernel/nfile.h"

#include "kernel/nautoref.h"

/**//// -必要头文件

///----------------------------------------------------------------------------

/// +链接库

#pragma comment(lib, "wsock32.lib")

#pragma comment(lib, "d_nkernel.lib")

/**//// -链接库

///----------------------------------------------------------------------------

/// +Application

int main(int argc, const char** argv)

...{

/**//// 创建KernelServer

nKernelServer* ks = n_new(nKernelServer);

/**////----------------------------------------------------------------------------

/// +获得FileServer2的实例

/// @note:有以下四种方式。在一般情况下他们是等价的

nFileServer2* pFileServer = NULL;

// 1.通过Singleton获得

pFileServer = nFileServer2::Instance();

// 2.通过KernelServer直接获得

pFileServer = ks->GetFileServer();

// 3.通过NOH体系获得

pFileServer = (nFileServer2*)ks->Lookup("sys/servers/file2");

// 4.通过nAutoRef获得(同NOH体系获得法)

nAutoRef<nFileServer2> refFileServer("sys/servers/file2");

if ( refFileServer.isvalid() )

...{

pFileServer = refFileServer.get();

}

/**//// -获得FileServer2的实例

///----------------------------------------------------------------------------

ks->Print("*****Assigns Operation***** ");

/**////----------------------------------------------------------------------------

/// +Assigns

/// @note:

/// 1. Assigns是一种以标识替代绝对路径的技术，它对于应用程序的资源部署非常有用

/// 2. Assigns的变量都以nEnv类型存储在NOH体系的/sys/share/assigns/位置下

/// 3. /sys/share/assigns/home和/sys/share/assigns/bin是两个默认存在的变量，

/// 分别是应用程序根和执行文件所在路径。

/// 4. 在设置完Assign路径后就可以通过"assign:filename"的形式来索引文件了。

///

// 两个默认的assigns

nString home = pFileServer->GetAssign("home");

nString bin = pFileServer->GetAssign("bin");

nString user = pFileServer->GetAssign("user");

nString temp = pFileServer->GetAssign("temp");

ks->Print("home: %s ", home.Get());

ks->Print("bin : %s ", bin.Get() );

ks->Print("user: %s ", user.Get());

ks->Print("temp: %s ", temp.Get());

// 设置proj索引

pFileServer->SetAssign("proj", "d:/");

nString proj = pFileServer->GetAssign("proj");

ks->Print("proj: %s ", proj.Get());

/**////

/// -Assigns

///----------------------------------------------------------------------------

ks->Print("*****File W/R Operation***** ");

/**////----------------------------------------------------------------------------

/// +File Operation

///

// get nFile object

nFile* file = pFileServer->NewFileObject();

// open file for write

file->Open("bin:T02.txt", "w");

// write file

nString output("T02 FileWriteTest!");

file->Write(output.Get(), output.Length());

// close file for write

file->Close();

// open file for read

file->Open("bin:T02.txt", "r");

// read file content

char buf[512];

int readCount = file->Read(buf, sizeof(buf));

buf[readCount] = 0;

// log content

nString absPath = pFileServer->ManglePath("bin:T02.txt");

ks->Print("Read File from: %s ", absPath.Get());

ks->Print("File Content: %s", buf);

// close file for read

file->Close();

// release nFile object

file->Release();

/**////

/// -File Operation

///----------------------------------------------------------------------------

/// 销毁KernelServer

n_delete(ks);

getchar();

return 0;

}

/**//// -Application

///----------------------------------------------------------------------------