118 lines
2.5 KiB
C++
118 lines
2.5 KiB
C++
/*
|
|
----
|
|
This file is part of SECONDO.
|
|
|
|
Copyright (C) 2007,
|
|
Faculty of Mathematics and Computer Science,
|
|
Database Systems for New Applications.
|
|
|
|
SECONDO 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; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
SECONDO 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 SECONDO; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
----
|
|
|
|
|
|
1 QueryExecutor for Distributed-SECONDO
|
|
|
|
|
|
1.1 Includes
|
|
|
|
*/
|
|
|
|
#ifndef __QEXECUTOR_HEARTBEAT__
|
|
#define __QEXECUTOR_HEARTBEAT__
|
|
|
|
#include <string>
|
|
#include <iostream>
|
|
#include <map>
|
|
#include <algorithm>
|
|
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
|
|
#include "../../CassandraAdapter.h"
|
|
#include "SecondoInterface.h"
|
|
#include "NestedList.h"
|
|
#include "NList.h"
|
|
#include "CassandraAdapter.h"
|
|
#include "CassandraResult.h"
|
|
|
|
|
|
/*
|
|
1.2 Defines
|
|
|
|
*/
|
|
// Send heartbeat message to cassandra all n seconds
|
|
#define HEARTBEAT_UPDATE 5
|
|
|
|
/*
|
|
1.1 Usings
|
|
|
|
*/
|
|
using namespace std;
|
|
using namespace cassandra;
|
|
|
|
|
|
/*
|
|
2.0 Helper class for sending our own hearbeat
|
|
messages to cassandra. This class will be executed
|
|
in the background in its own thread.
|
|
|
|
*/
|
|
class HeartbeatUpdater {
|
|
|
|
public:
|
|
|
|
HeartbeatUpdater(string myCassandraIp, string myCassandraKeyspace)
|
|
: cassandraIp(myCassandraIp),
|
|
cassandraKeyspace(myCassandraKeyspace),
|
|
cassandra(NULL), active(true) {
|
|
|
|
// Connect to cassandra
|
|
cassandra = new CassandraAdapter
|
|
(cassandraIp, cassandraKeyspace);
|
|
|
|
cout << "[Heartbeat] Connecting to " << cassandraIp;
|
|
cout << " / " << cassandraKeyspace << endl;
|
|
|
|
if(cassandra != NULL) {
|
|
cassandra -> connect(false);
|
|
} else {
|
|
cerr << "[Heartbeat] Unable to connect to cassandra, ";
|
|
cerr << "exiting thread" << endl;
|
|
active = false;
|
|
}
|
|
}
|
|
|
|
virtual ~HeartbeatUpdater() {
|
|
cout << "[Heartbeat] Shutdown because destructor called" << endl;
|
|
stop();
|
|
}
|
|
|
|
|
|
bool updateHeartbeat();
|
|
bool executeQuery(string query);
|
|
void run();
|
|
void stop();
|
|
|
|
private:
|
|
string cassandraIp;
|
|
string cassandraKeyspace;
|
|
CassandraAdapter* cassandra;
|
|
bool active;
|
|
|
|
};
|
|
|
|
#endif
|