forked from mengning/nezha
/
remotedbapi.c
228 lines (216 loc) · 6.5 KB
/
remotedbapi.c
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/********************************************************************/
/* Copyright (C) MC2Lab-USTC, 2012 */
/* */
/* FILE NAME : remotedbapi.c */
/* PRINCIPAL AUTHOR : Mengning */
/* SUBSYSTEM NAME : network */
/* MODULE NAME : remotedbapi */
/* LANGUAGE : C */
/* TARGET ENVIRONMENT : Linux */
/* DATE OF FIRST RELEASE : 2012/12/18 */
/* DESCRIPTION : Impement of Client Side Interface */
/* to access database */
/********************************************************************/
/*
* Revision log:
*
* Created by Mengning ,2012/5/30
* Modify for Nezha project,by Mengning,2012/11/27
* Modify for Client Side of Nezha project,by Mengning,2012/12/18
* change api names for inserting cloud module,
* so that provide the same api for higher layer,by Mengning,2012/12/28
*/
#include "remotedbapi.h"
#include "socketwrapper.h"
#include "protocol.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#define MAX_BUF_LEN 1024
#define debug
/*
* Create an Database
*/
int RemoteDBCreate(const char * filename,char * addr,int port)
{
if(filename == NULL)
{
fprintf(stderr,"filename Error,%s:%d\n", __FILE__,__LINE__);
filename = "nezha.hdb";
}
/* connect server */
tServiceHandler dbhandler = OpenRemoteService(addr,port);
if(dbhandler == -1)
{
return -1;
}
/* open database file */
char Buf[MAX_BUF_LEN] = "\0";
int BufSize = MAX_BUF_LEN;
FormatData1(Buf,&BufSize,OPEN_CMD,(char*)filename,strlen(filename));
SendData(dbhandler,Buf,BufSize);
BufSize = MAX_BUF_LEN;
RecvData(dbhandler,Buf,&BufSize);
int cmd = -1;
int DataNum = -1;
char Data1[MAX_BUF_LEN] = "\0";
int Data1Size = MAX_BUF_LEN;
char Data2[MAX_BUF_LEN] = "\0";
int Data2Size = MAX_BUF_LEN;
ParseData(Buf,MAX_BUF_LEN,&cmd,&DataNum,Data1,&Data1Size,Data2,&Data2Size);
if(cmd != OPEN_RSP || DataNum != 0)
{
fprintf(stderr,"Remote DBCreate Error,%s:%d\n", __FILE__,__LINE__);
return -1;
}
return dbhandler;
}
/*
* Delete the Database
*/
int RemoteDBDelete(int db)
{
/* close database file */
char Buf[MAX_BUF_LEN] = "\0";
int BufSize = MAX_BUF_LEN;
FormatData(Buf,&BufSize,CLOSE_CMD);
SendData(db,Buf,BufSize);
BufSize = MAX_BUF_LEN;
if(RecvData(db,Buf,&BufSize) == 0)
{
fprintf(stderr,"Connection Error,%s:%d\n",__FILE__,__LINE__);
return -1;
}
int cmd = -1;
int DataNum = -1;
char Data1[MAX_BUF_LEN] = "\0";
int Data1Size = MAX_BUF_LEN;
char Data2[MAX_BUF_LEN] = "\0";
int Data2Size = MAX_BUF_LEN;
ParseData(Buf,MAX_BUF_LEN,&cmd,&DataNum,Data1,&Data1Size,Data2,&Data2Size);
if(cmd != CLOSE_RSP || DataNum != 0)
{
fprintf(stderr,"Remote DBDelete Error,%s:%d\n", __FILE__,__LINE__);
return -1;
}
/* close connection */
if(CloseRemoteService(db) == -1)
{
return -1;
}
return 0;
}
/*
* Set key/value
*/
int RemoteDBSetKeyValue(int db,tKey key,tValue value)
{
char Buf[MAX_BUF_LEN] = "\0";
int BufSize = MAX_BUF_LEN;
int ret = FormatData2(Buf,&BufSize,SET_CMD,(char*)key.str,key.len,value.str,value.len);
if(ret == -1)
{
return -1;
}
SendData(db,Buf,BufSize);
BufSize = MAX_BUF_LEN;
if(RecvData(db,Buf,&BufSize) == 0)
{
fprintf(stderr,"Connection Error,%s:%d\n",__FILE__,__LINE__);
return -1;
}
int cmd = -1;
int DataNum = -1;
char Data1[MAX_BUF_LEN] = "\0";
int Data1Size = MAX_BUF_LEN;
char Data2[MAX_BUF_LEN] = "\0";
int Data2Size = MAX_BUF_LEN;
ParseData(Buf,BufSize,&cmd,&DataNum,Data1,&Data1Size,Data2,&Data2Size);
if(cmd != SET_RSP || DataNum != 0)
{
fprintf(stderr,"Remote DBSetKeyValue Error,%s:%d\n", __FILE__,__LINE__);
return -1;
}
return 0;
}
/*
* get key/value
*/
int RemoteDBGetKeyValue(int db,tKey key,tValue *pvalue)
{
if(db == -1 || pvalue == NULL)
{
return -1;
}
char Buf[MAX_BUF_LEN] = "\0";
int BufSize = MAX_BUF_LEN;
int ret = FormatData1(Buf,&BufSize,GET_CMD,(char*)key.str,key.len);
if(ret == -1)
{
return -1;
}
SendData(db,Buf,BufSize);
BufSize = MAX_BUF_LEN;
if(RecvData(db,Buf,&BufSize) == 0)
{
fprintf(stderr,"Connection Error,%s:%d\n",__FILE__,__LINE__);
return -1;
}
int cmd = -1;
int DataNum = -1;
char Data1[MAX_BUF_LEN] = "\0";
int Data1Size = MAX_BUF_LEN;
char Data2[MAX_BUF_LEN] = "\0";
int Data2Size = MAX_BUF_LEN;
ParseData(Buf,BufSize,&cmd,&DataNum,Data1,&Data1Size,Data2,&Data2Size);
if(cmd == ERROR_RSP && DataNum == 1)
{
return -1;
}
if(cmd != GET_RSP || DataNum != 2 )
{
fprintf(stderr,"Remote DBGetKeyValue Error,%s:%d\n", __FILE__,__LINE__);
return -1;
}
pvalue->len = Data2Size;
memcpy(pvalue->str,Data2,Data2Size);
return 0;
}
/*
* delete key/value
*/
int RemoteDBDelKeyValue(int db,tKey key)
{
if(db == -1)
{
return -1;
}
char Buf[MAX_BUF_LEN] = "\0";
int BufSize = MAX_BUF_LEN;
int ret = FormatData1(Buf,&BufSize,DELETE_CMD,(char*)key.str,key.len);
if(ret == -1)
{
return -1;
}
SendData(db,Buf,BufSize);
BufSize = MAX_BUF_LEN;
if(RecvData(db,Buf,&BufSize) == 0)
{
fprintf(stderr,"Connection Error,%s:%d\n",__FILE__,__LINE__);
return -1;
}
int cmd = -1;
int DataNum = -1;
char Data1[MAX_BUF_LEN] = "\0";
int Data1Size = MAX_BUF_LEN;
char Data2[MAX_BUF_LEN] = "\0";
int Data2Size = MAX_BUF_LEN;
ParseData(Buf,BufSize,&cmd,&DataNum,Data1,&Data1Size,Data2,&Data2Size);
if(cmd == ERROR_RSP && DataNum == 1)
{
fprintf(stderr,"%s,%s:%d\n",Data1, __FILE__,__LINE__);
return -1;
}
return 0;
}