void JobServer::executeCommand(std::string s)
{
std::stringstream ss;
std::string line;
ss << s;
getline(ss, line, ' '); //get the first argument from the string
if(line == "issuejob") //if it's issuejob
{
MyJob* mj = getJob(s); //create the new job
queuedJobs.insertEntry(mj); //add it in the queued jobs
while(!queuedJobs.isEmpty() && concurrency > activeJobs.length())
addNewJob(); //then try to activate it
sendResponse(mj); //send the response
jobCount++; //increase the number of total jobs
return; //and return
}
if(line == "setConcurrency") //if it's set concurrency
{
setConcurrency(getSecondToLastNumber(s)); //change the concurrency
while(!queuedJobs.isEmpty() && concurrency > activeJobs.length())
addNewJob(); //try to add more jobs
return; //return
}
if(line == "stop") //if it's stop
{ //get the number you want stopped
int jobid = getSecondToLastNumber(s);
if(queuedJobs.jobIdExists(jobid)) //check if it's in queued jobs
{
queuedJobs.removeEntryByJobId(jobid); //and remove it
}
else //else
{
int pid = activeJobs.getPidByJobId(jobid); //get it's pid
if(pid != -1)
{
kill(pid, SIGTERM);//send a signal for it to be terminated
activeJobs.removeEntryByJobId(jobid); //and remove it from the list
}
while(!queuedJobs.isEmpty() && concurrency > activeJobs.length())
addNewJob(); //then add new jobs to replace that
}
return; //and return
}
if(line == "poll")
{ //if it's poll
getline(ss, line, ' ');
if(line == "queued") //find out if it's queued or active
sendResponse(1);
else //and send the appropriate response
sendResponse(0);
return; //then return
}
if(line == "exit")
{ //if it's exit
terminate(); //close up everything
exit(0); //and exit
}
}
void server_run() {
int filedes,filed,size,numbofargs,i,jsize=0,jobID=0,digit_count = 0,num,status,N,id;
pid_t cpid,commpid,stopid;
char *buffer;
char *temp;
char *command;
char *jobname;
char *str;
char **args;
static struct sigaction act;
act.sa_handler = handler;
sigfillset(&(act.sa_mask));
sigaction(SIGRTMIN, &act, NULL);
static struct sigaction chd;
chd.sa_handler = child_handler;
sigfillset(&(chd.sa_mask));
sigaction(SIGCHLD, &chd, NULL);
if (( filedes = open("server", O_CREAT | O_RDWR , 0666))== -1) {
perror (" creating ");
exit (3) ;
}
cpid = getpid();
num = cpid;
digit_count += no_of_digits(num);
str = malloc(sizeof(char)*(digit_count+1));//to str einai ena string pou exei mesa to pid tou server
str[digit_count] = '\0';
while(num > 0){
str[digit_count-1] = num%10 + '0';
num = num/10;
digit_count--;
}
if ((write(filedes,str,sizeof(strlen(str)+1))) == -1) {
perror ("Error in Writing ");
exit (4) ;
}
free(str);
if ((filed = open("myfifo",O_RDWR)) <0 ){
perror (" fifo open problem ");
exit(8);
}
list_create();
kill(getppid(),SIGRTMIN);
while (1) {
flag = 0;
while (flag == 0)
sleep(1);
jsize = 0;
read(filed,&commpid,sizeof(pid_t));
read(filed,&numbofargs,sizeof(int));
args = (char**)malloc(numbofargs*sizeof(char*));
read(filed,&size,sizeof(int));
buffer = (char *)malloc(size);
read(filed,buffer,size);
temp = (char *)malloc(size);
strcpy(temp,buffer);
command = strtok(temp," ");//pairnw thn entolh(issuejob,poll klp)
for (i=0;i<numbofargs;i++) {
args[i] = strtok(NULL," ");
jsize += strlen(args[i])+1;//kai ta argument auths
}
jsize += 1;
jobname = (char *)malloc(jsize);
jobname[0] = '\0';
for (i=0;i<numbofargs;i++) {
strcat(jobname,args[i]);
strcat(jobname," ");
}
if (strcmp(command,"issuejob") == 0) {
if (args[0] == NULL) {//se periptwsh pou den dwthei argument meta to issuejob
free(args);
free(temp);
free(buffer);
free(jobname);
continue;
}
jobID++;
issuejob(args,numbofargs,jobname,jobID,&status);
write(filed,&jobID,sizeof(int));
write(filed,&status,sizeof(int));
write(filed,&jsize,sizeof(int));
write(filed,jobname,jsize);
kill(commpid,SIGRTMIN);
}
else if (strcmp(command,"setConcurrency") == 0) {
if (args[0] == NULL) {
free(args);
free(temp);
free(buffer);
free(jobname);
continue;
}
N = atoi(args[0]);
setConcurrency(N);
}
else if (strcmp(command,"stop") == 0) {
if (args[0] == NULL) {
free(args);
free(temp);
free(buffer);
free(jobname);
continue;
}
id = atoi(args[0]);
search_and_delete(id,&stopid);
if (stopid != 0)
kill(stopid,SIGKILL);
}
else if (strcmp(command,"poll") == 0) {
if (args[0] == NULL) {
free(args);
free(temp);
free(buffer);
free(jobname);
continue;
}
if (strcmp(args[0],"running") == 0)
poll(1,filed);
else if (strcmp(args[0],"queued") == 0)
poll(0,filed);
else {
free(args);
free(temp);
free(buffer);
free(jobname);
continue;
}
kill(commpid,SIGRTMIN);
}
else if (strcmp(command,"exit") == 0) {
queued_delete_all();//sbinw olh th lista anamonhs
free(args);
free(temp);
free(buffer);
free(jobname);
while (get_running_jobs() != 0)//kai prin kleisei o server perimenw na teleiwsoun oles oi running jobs
sleep(1);
break;
}
free(args);
free(temp);
free(buffer);
free(jobname);
}
list_destroy();
remove("server");
remove("myfifo");
}
