ULaserDevice::~ULaserDevice()
{
logFileClose();
if (pushData != NULL)
delete pushData;
}
/*****************************************************************
* NAME: main
*
* DESCRIPTION: Main function of the leader host i.e. the contact
* host that approves other hosts to join the
* network and the member host. This binary is
* invoked via a start up script. The parameters are
* port no and ip address and node type.
*
* PARAMETERS:
* (int) argc - number of command line arguments
* (char *) argv - two command line arguments apart
* from argv[0] namely:
* i) Port No
* ii) Ip Address of host
* iii) Host Type
* "leader" -> Leader Node
* "member" -> Member Node
* iv) Host ID
*
* RETURN:
* (int) ZERO if success
* ERROR otherwise
*
****************************************************************/
int main(int argc, char *argv[])
{
int rc = SUCCESS, // Return code
i_rc; // Intermittent return code
char leaderIpAddress[SMALL_BUF_SZ], // Buffer to hold leader ip
leaderPortNo[SMALL_BUF_SZ]; // Buffer to hold leader port no
/*
* Init log file
*/
i_rc = logFileCreate();
if ( i_rc != SUCCESS )
{
printf("\nLog file won't be created. There was an error\n");
rc = ERROR;
goto rtn;
}
funcEntry(logF, "I am starting", "host::main");
/*
* Command line arguments check
*/
i_rc = CLA_checker(argc, argv);
if ( i_rc != SUCCESS )
{
rc = ERROR;
goto rtn;
}
/*
* Copy ip address and port no to local buffer
*/
memset(ipAddress, '\0', SMALL_BUF_SZ);
sprintf(ipAddress, "%s", argv[2]);
memset(portNo, '\0', SMALL_BUF_SZ);
sprintf(portNo, "%s", argv[1]);
host_no = atoi(argv[4]);
/*
* Init local host heart beat table
*/
initialize_table(portNo, ipAddress, host_no);
printToLog(logF, ipAddress, "Initialized my table");
/*
* Get the node type based on third argument. By default it
* is always member node.
*/
if ( SUCCESS == strcmp(argv[3], LEADER_STRING) )
{
isLeader = true;
printToLog(logF, ipAddress, "I am the leader node");
}
else
{
printToLog(logF, ipAddress, "I am a member node");
}
/*
* Set up UDP
*/
i_rc = setUpUDP(portNo, ipAddress);
if ( i_rc != SUCCESS )
{
rc = ERROR;
printToLog(logF, ipAddress, "UDP setup failure");
goto rtn;
}
// Log current status
printToLog(logF, ipAddress, "UDP setup successfully");
/*
* If current host is a LEADER then log that this host has
* joined the distributed system
*/
if ( isLeader )
{
printToLog(logF, ipAddress, "I, THE LEADER have joined the Daisy Distributed System");
}
/*
* Display the CLI UI if this host is a MEMBER host which
* asks member if he wants to send join message to leader node
* and calls the function requestMembershipToLeader() which
* does the job
*/
if ( !isLeader )
{
i_rc = CLI_UI();
if ( i_rc != SUCCESS )
{
rc = ERROR;
goto rtn;
}
}
/*
* If leader ask if this a new incarnation or a
* reincarnation
*/
else
{
i_rc = askLeaderIfRejoinOrNew();
if ( i_rc != SUCCESS )
{
rc = ERROR;
goto rtn;
}
}
/*
* Set up infrastructure for node to leave
* voluntarily
*/
signal(SIGABRT, leaveSystem);
if ( errno != SUCCESS )
{
printf("SIGINT set error %d \n", errno);
}
/*
* Spawn the helper threads
*/
i_rc = spawnHelperThreads();
if ( i_rc != SUCCESS )
{
rc = ERROR;
goto rtn;
}
rtn:
funcExit(logF, ipAddress, "Host::main", rc);
/*
* Close the log
*/
if ( logF != NULL )
{
logFileClose(logF);
}
return rc;
} // End of main
