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the begginning

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david hill
2016-01-06 14:08:59 -06:00
parent 66a31debcb
commit f6afc42dd0
18251 changed files with 16460679 additions and 2 deletions
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versioning/BRM/rollback.cpp Normal file
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/* Copyright (C) 2014 InfiniDB, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; version 2 of
the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA. */
/*****************************************************************************
* $Id: rollback.cpp 1825 2013-01-24 18:41:00Z pleblanc $
*
****************************************************************************/
/*
* A tool to print current transactions & roll them back if necessary.
*
* A tool to print current transactions & roll them back if necessary.
* The proper way to use it is:
* rollback -p (to get the transaction(s) that need to be rolled back)
* rollback -r transID (for each one to roll them back)
*/
#include "dbrm.h"
#include <iostream>
#include <stdlib.h>
#include "IDBPolicy.h"
using namespace std;
using namespace BRM;
void help(string name)
{
cout << "Usage: " << endl << name << " -r txnID" << endl;
cout << name << " -p" << endl << endl;
cout << "Options:" << endl;
cout << " -r -- rollback a transaction in the BRM data structures" << endl;
cout << " -p -- print current transactions according to the BRM" << endl;
}
void printTxnIDs()
{
DBRM brm;
set<VER_t> txnList;
set<VER_t>::iterator it;
int err;
err = brm.getCurrentTxnIDs(txnList);
if (err != 0)
return;
for (it = txnList.begin(); it != txnList.end(); it++)
cout << *it << endl;
}
void rollbackTxn(VER_t txnID)
{
DBRM brm;
vector<LBID_t> lbidList;
int err;
err = brm.getUncommittedLBIDs(txnID, lbidList);
if (err != 0)
return;
err = brm.vbRollback(txnID, lbidList);
if (err != 0)
return;
cout << "OK." << endl;
}
int main(int argc, char **argv) {
int opt;
char options[] = "pr:";
VER_t txnID = -1;
string progname(argv[0]);
while ((opt = getopt (argc, argv, options)) != -1) {
switch (opt) {
case 'r':
txnID = atoi (optarg);
if (txnID < 1) {
help(progname);
exit(0);
}
idbdatafile::IDBPolicy::configIDBPolicy();
rollbackTxn(txnID);
exit(0);
case 'p':
printTxnIDs();
exit(0);
}
}
help(progname);
exit(0);
}