the begginning

writeengine/splitter/we_tablelockgrabber.cpp

@@ -0,0 +1,124 @@
+/* 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. */
+
+/*******************************************************************************
+* $Id$
+*
+*******************************************************************************/
+
+/*
+ * we_tablelockgrabber.cpp
+ *
+ *  Created on: Dec 19, 2011
+ *      Author: bpaul
+ */
+
+#include "brm.h"
+#include "brmtypes.h"
+using namespace BRM;
+
+#include <iostream>
+using namespace std;
+
+#include "we_sdhandler.h"
+#include "we_tablelockgrabber.h"
+
+
+
+namespace WriteEngine
+{
+
+uint64_t WETableLockGrabber::grabTableLock(std::vector<unsigned int> &PmList,
+															uint32_t tableOID)
+{
+	uint64_t aLockId;
+	std::string aProcName = "cpimport";
+	uint32_t aProcId = getpid();
+	int32_t aSessId = -1;
+	int32_t aTxnId = -1;
+
+
+
+	try
+	{
+		aLockId = fRef.fDbrm.getTableLock(PmList, tableOID, &aProcName,
+							&aProcId, &aSessId, &aTxnId, BRM::LOADING);
+	}
+	catch (std::exception &e)
+	{
+
+		cout << "ERROR: Failed to get Table Lock " << e.what() << endl;
+		throw runtime_error(e.what());
+	}
+	if (aLockId == 0)
+	{
+		ostringstream oss;
+		oss << " Table currently locked by process-" <<
+        aProcName << "; pid-" << aProcId <<
+        "; session-" << aSessId <<
+        "; txn-" << aTxnId;
+		throw runtime_error(oss.str());
+	}
+	//cout << "lock ID = " << aLockId << endl;
+	//if (aLockId == 0)
+	//	cout << " existing owner name = " << aProcName << " pid = " <<
+	//						aProcId << " session = " << aSessId << endl;
+
+	return aLockId;
+}
+
+bool WETableLockGrabber::releaseTableLock(uint64_t LockId)
+{
+	bool aRet;
+	//cout << "releasing lock " << LockId << endl;
+	try
+	{
+		aRet = fRef.fDbrm.releaseTableLock(LockId);
+	}
+	catch (std::exception &e)
+	{
+		cout << "caught an exception: " << e.what() << endl;
+		throw runtime_error(e.what());
+	}
+	return aRet;
+}
+
+bool WETableLockGrabber::changeTableLockState(uint64_t LockId)
+{
+	bool aRet;
+
+	//cout << "changing state of lock " << LockId << endl;
+
+	try
+	{
+		aRet = fRef.fDbrm.changeState(LockId, BRM::CLEANUP);
+	}
+	catch (std::exception &e)
+	{
+		cout << "caught an exception: " << e.what() << endl;
+		throw runtime_error(e.what());
+	}
+	return aRet;
+}
+
+
+
+
+
+
+
+} /* namespace WriteEngine */