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# ApMon.h File Reference

Declarations for the ApMon class. More...

`#include <sys/types.h>`
`#include <sys/stat.h>`
`#include <errno.h>`
`#include <stdio.h>`
`#include <stdlib.h>`
`#include <string.h>`
`#include <stdexcept>`
`#include <ctype.h>`
`#include <time.h>`
`#include <sys/socket.h>`
`#include <sys/ioctl.h>`
`#include <sys/utsname.h>`
`#include <sys/time.h>`
`#include <arpa/inet.h>`
`#include <netinet/in.h>`
`#include <net/if.h>`
`#include <rpc/rpc.h>`
`#include <netdb.h>`
`#include <unistd.h>`
`#include <pthread.h>`
`#include <pwd.h>`
`#include <grp.h>`
`#include <linux/param.h>`
Include dependency graph for ApMon.h:
This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

## Classes
struct | ConfURLs
| Data structure which holds the configuration URLs. More...
struct | MonitoredJob
| Data structure which holds information about a job monitored by ApMon. More...
class | ApMon
| Data structure used for sending monitoring data to a MonaLisa module. More...
## Defines
#define | ApMon_h
#define | XDR_STRING 0
| Used to code the string data type.
#define | XDR_INT32 2
| Used to code the 4 bytes integer data type.
#define | XDR_REAL32 4
| Used to code the 4 bytes real data type.
#define | XDR_REAL64 5
| Used to code the 8 bytes real data type.
#define | MAX_DGRAM_SIZE 8192
| Maximum UDP datagram size.
#define | MAX_STRING_LEN 512
| Maximum string length (for hostnames).
#define | MAX_STRING_LEN1 (MAX_STRING_LEN + 1)
#define | RET_SUCCESS 0
| Function return value (succes).
#define | RET_ERROR -1
| Function return value (error).
#define | PROCUTILS_ERROR -2
#define | RET_NOT_SENT -3
| A datagram was not sent because the number of datagrams that can be sent per second is limited.
#define | MAX_N_DESTINATIONS 30
| Maximum number of destinations hosts to which we send the parameters.
#define | DEFAULT_PORT 8884
| The default port on which MonALISa listens.
#define | MAX_HEADER_LENGTH 40
| Maximum header length.
#define | FILE_INIT 1
| Indicates that the object was initialized from a file.
#define | LIST_INIT 2
| Indicates that the object was initialized from a list.
#define | DIRECT_INIT 3
| Indicates that the object was initialized directly.
#define | JOB_MONITOR_INTERVAL 20
| Time interval (in sec) at which job monitoring datagrams are sent.
#define | SYS_MONITOR_INTERVAL 20
| Time interval (in sec) at which system monitoring datagams are sent.
#define | RECHECK_INTERVAL 600
| Time interval (in sec) at which the configuration files are checked for changes.
#define | GEN_MONITOR_INTERVALS 10
| The number of time intervals at which ApMon sends general system monitoring information (considering the time intervals at which ApMon sends system monitoring information).
#define | MAX_MONITORED_JOBS 30
| The maximum number of jobs that can be monitored.
#define | MAX_SYS_PARAMS 30
| The maximum number of system parameters.
#define | MAX_GEN_PARAMS 30
| The maximum number of general system parameters.
#define | MAX_JOB_PARAMS 30
| The maximum number of job parameters.
#define | MAX_MSG_RATE 20
| The maxim number of mesages per second that will be sent to MonALISA.
#define | NLETTERS 26
#define | TWO_BILLION 2000000000
#define | APMON_VERSION "2.2.1"
## Typedefs
typedef struct ConfURLs | ConfURLs
| Data structure which holds the configuration URLs.
typedef struct MonitoredJob | MonitoredJob
| Data structure which holds information about a job monitored by ApMon.
## Functions
void * | bkTask (void *param)
| Performs background actions like rechecking the configuration file and the URLs and sending monitoring information.

## Detailed Description

Declarations for the ApMon class.

The ApMon class can be used for sending monitoring data to one or more destination hosts that run MonALISA.

Definition in file ApMon.h.

## Define Documentation

#define ApMon_h

Definition at line 49 of file ApMon.h.

#define APMON_VERSION "2.2.1"

Definition at line 155 of file ApMon.h.

#define DEFAULT_PORT 8884

The default port on which MonALISa listens.

Definition at line 114 of file ApMon.h.

#define DIRECT_INIT 3

Indicates that the object was initialized directly.

Definition at line 126 of file ApMon.h.

#define FILE_INIT 1

Indicates that the object was initialized from a file.

Definition at line 118 of file ApMon.h.

#define GEN_MONITOR_INTERVALS 10

The number of time intervals at which ApMon sends general system monitoring information (considering the time intervals at which ApMon sends system monitoring information).

Definition at line 138 of file ApMon.h.

#define JOB_MONITOR_INTERVAL 20

Time interval (in sec) at which job monitoring datagrams are sent.

Definition at line 128 of file ApMon.h.

#define LIST_INIT 2

Indicates that the object was initialized from a list.

Definition at line 123 of file ApMon.h.

#define MAX_DGRAM_SIZE 8192

Maximum UDP datagram size.

Definition at line 102 of file ApMon.h.

#define MAX_GEN_PARAMS 30

The maximum number of general system parameters.

Definition at line 144 of file ApMon.h.

#define MAX_HEADER_LENGTH 40

Maximum header length.

Definition at line 115 of file ApMon.h.

#define MAX_JOB_PARAMS 30

The maximum number of job parameters.

Definition at line 146 of file ApMon.h.

#define MAX_MONITORED_JOBS 30

The maximum number of jobs that can be monitored.

Definition at line 140 of file ApMon.h.

#define MAX_MSG_RATE 20

The maxim number of mesages per second that will be sent to MonALISA.

Definition at line 149 of file ApMon.h.

#define MAX_N_DESTINATIONS 30

Maximum number of destinations hosts to which we send the parameters.

Definition at line 111 of file ApMon.h.

#define MAX_STRING_LEN 512

Maximum string length (for hostnames).

Definition at line 103 of file ApMon.h.

#define MAX_STRING_LEN1 (MAX_STRING_LEN + 1)

Definition at line 104 of file ApMon.h.

#define MAX_SYS_PARAMS 30

The maximum number of system parameters.

Definition at line 142 of file ApMon.h.

#define NLETTERS 26

Definition at line 151 of file ApMon.h.

#define PROCUTILS_ERROR -2

Definition at line 107 of file ApMon.h.

#define RECHECK_INTERVAL 600

Time interval (in sec) at which the configuration files are checked for changes.

Definition at line 133 of file ApMon.h.

#define RET_ERROR -1

Function return value (error).

Definition at line 106 of file ApMon.h.

#define RET_NOT_SENT -3

A datagram was not sent because the number of datagrams that can be sent per second is limited.

Definition at line 108 of file ApMon.h.

#define RET_SUCCESS 0

Function return value (succes).

Definition at line 105 of file ApMon.h.

#define SYS_MONITOR_INTERVAL 20

Time interval (in sec) at which system monitoring datagams are sent.

Definition at line 130 of file ApMon.h.

#define TWO_BILLION 2000000000

Definition at line 153 of file ApMon.h.

#define XDR_INT32 2

Used to code the 4 bytes integer data type.

Definition at line 97 of file ApMon.h.

#define XDR_REAL32 4

Used to code the 4 bytes real data type.

Definition at line 99 of file ApMon.h.

#define XDR_REAL64 5

Used to code the 8 bytes real data type.

Definition at line 100 of file ApMon.h.

#define XDR_STRING 0

Used to code the string data type.

Definition at line 95 of file ApMon.h.

## Typedef Documentation

typedef struct ConfURLs ConfURLs

Data structure which holds the configuration URLs.

typedef struct MonitoredJob MonitoredJob

Data structure which holds information about a job monitored by ApMon.

## Function Documentation

void* bkTask | ( | void * | param ) |

Performs background actions like rechecking the configuration file and the URLs and sending monitoring information.

This function is executed in a background thread and has two roles: it automatically sends the system/job monitoring parameters (if the user requested) and it checks the configuration file/URLs for changes.

(this is done in a separate thread).

Definition at line 918 of file ApMon.cpp.

                              {
    #else
    DWORD WINAPI bkTask(void *param) {
    #endif
      struct stat st;
    #ifndef WIN32
      struct timespec delay;
    #else
      DWORD delay;
    #endif
      bool resourceChanged, haveChange;
      int nextOp = -1, i, ret;
      int generalInfoCount;
      time_t crtTime, timeRemained;
      time_t nextRecheck = 0, nextJobInfoSend = 0, nextSysInfoSend = 0;
      ApMon *apm = (ApMon *)param;
      char logmsg[200];

      logger(INFO, "[Starting background thread...]");
      apm -> bkThreadStarted = true;

      crtTime = time(NULL);

      pthread_mutex_lock(&(apm -> mutexBack));
      if (apm -> confCheck) {
        nextRecheck = crtTime + apm -> crtRecheckInterval;
        //sprintf(logmsg, "###1 crt %ld interv %ld recheck %ld ", crtTime,
        //   apm -> crtRecheckInterval, nextRecheck);
        //logger(FINE, logmsg);
        //fflush(stdout);
      }
      if (apm -> jobMonitoring)
        nextJobInfoSend = crtTime + apm -> jobMonitorInterval;
      if (apm -> sysMonitoring)
        nextSysInfoSend = crtTime + apm -> sysMonitorInterval;
      pthread_mutex_unlock(&(apm -> mutexBack));

      timeRemained = -1;
      generalInfoCount = 0;

      while (1) {
        pthread_mutex_lock(&apm -> mutexBack);
        if (apm -> stopBkThread) {
    //      printf("### stopBkThread \n");
          pthread_mutex_unlock(&apm -> mutexBack);
          break;
        }
        pthread_mutex_unlock(&apm -> mutexBack);

        //sprintf(logmsg, "### 2 recheck %ld sys %ld ", nextRecheck,
        //    nextSysInfoSend);
        //logger(FINE, logmsg);

        /* determine the next operation that must be performed */
        if (nextRecheck > 0 && (nextJobInfoSend <= 0 ||
                                nextRecheck <= nextJobInfoSend)) {
          if (nextSysInfoSend <= 0 || nextRecheck <= nextSysInfoSend) {
            nextOp = RECHECK_CONF;
            timeRemained = nextRecheck - crtTime;
          } else {
            nextOp = SYS_INFO_SEND;
            timeRemained = nextSysInfoSend - crtTime;
          }
        } else {
          if (nextJobInfoSend > 0 && (nextSysInfoSend <= 0 ||
                                      nextJobInfoSend <= nextSysInfoSend)) {
            nextOp = JOB_INFO_SEND;
            timeRemained = nextJobInfoSend - crtTime;
          } else if (nextSysInfoSend > 0) {
            nextOp = SYS_INFO_SEND;
            timeRemained = nextSysInfoSend - crtTime;
          }
        }

        if (timeRemained == -1)
          timeRemained = RECHECK_INTERVAL;

    #ifndef WIN32
        /* the moment when the next operation should be performed */
        delay.tv_sec = crtTime + timeRemained;
        delay.tv_nsec = 0;
    #else
        delay = (/*crtTime +*/ timeRemained) * 1000;  // this is in millis
    #endif

        pthread_mutex_lock(&(apm -> mutexBack));

        pthread_mutex_lock(&(apm -> mutexCond));
        /* check for changes in the settings */
        haveChange = false;
        if (apm -> jobMonChanged || apm -> sysMonChanged || apm -> recheckChanged)
          haveChange = true;
        if (apm -> jobMonChanged) {
          if (apm -> jobMonitoring)
            nextJobInfoSend = crtTime + apm -> jobMonitorInterval;
          else
            nextJobInfoSend = -1;
          apm -> jobMonChanged = false;
        }
        if (apm -> sysMonChanged) {
          if (apm -> sysMonitoring)
            nextSysInfoSend = crtTime + apm -> sysMonitorInterval;
          else
            nextSysInfoSend = -1;
          apm -> sysMonChanged = false;
        }
        if (apm -> recheckChanged) {
          if (apm -> confCheck) {
            nextRecheck = crtTime + apm -> crtRecheckInterval;
          }
          else
            nextRecheck = -1;
          apm -> recheckChanged = false;
        }
        pthread_mutex_unlock(&(apm -> mutexBack));

        if (haveChange) {
          pthread_mutex_unlock(&(apm -> mutexCond));
          continue;
        }

        /* wait until the next operation should be performed or until
           a change in the settings occurs */
    #ifndef WIN32
        ret = pthread_cond_timedwait(&(apm -> confChangedCond),
                                    &(apm -> mutexCond), &delay);
        pthread_mutex_unlock(&(apm -> mutexCond));
    #else
        pthread_mutex_unlock(&(apm -> mutexCond));
        ret = WaitForSingleObject(apm->confChangedCond, delay);
    #endif
        if (ret == ETIMEDOUT) {
    //      printf("### ret TIMEDOUT\n");
          /* now perform the operation */
          if (nextOp == JOB_INFO_SEND) {
            apm -> sendJobInfo();
            crtTime = time(NULL);
            nextJobInfoSend = crtTime + apm -> getJobMonitorInterval();
          }

          if (nextOp == SYS_INFO_SEND) {
            apm -> sendSysInfo();
            if (apm -> getGenMonitoring()) {
              if (generalInfoCount <= 1)
                apm -> sendGeneralInfo();
              generalInfoCount = (generalInfoCount + 1) % apm -> genMonitorIntervals;
            }
            crtTime = time(NULL);
            nextSysInfoSend = crtTime + apm -> getSysMonitorInterval();
          }

          if (nextOp == RECHECK_CONF) {
            //logger(FINE, "### recheck conf");
            resourceChanged = false;
            try {
              if (apm -> initType == FILE_INIT) {
                sprintf(logmsg, "Checking for modifications for file %s ",
                        apm -> initSources[0]);
                logger(INFO, logmsg);
                stat(apm -> initSources[0], &st);
                if (st.st_mtime > apm -> lastModifFile) {
                  sprintf(logmsg, "File %s modified ", apm -> initSources[0]);
                  logger(INFO, logmsg);
                  resourceChanged = true;
                }
              }

              // check the configuration URLs
              for (i = 0; i < apm -> confURLs.nConfURLs; i++) {
                sprintf(logmsg, "[Checking for modifications for URL %s ] ",
                       apm -> confURLs.vURLs[i]);
                logger(INFO, logmsg);
                if (urlModified(apm -> confURLs.vURLs[i], apm -> confURLs.lastModifURLs[i])) {
                  sprintf(logmsg, "URL %s modified ", apm -> confURLs.vURLs[i]);
                  logger(INFO, logmsg);
                  resourceChanged = true;
                  break;
                }
              }

              if (resourceChanged) {
                logger(INFO, "Reloading configuration...");
                if (apm -> initType == FILE_INIT)
                  apm -> initialize(apm -> initSources[0], false);
                else
                  apm -> initialize(apm -> nInitSources, apm -> initSources, false);
              }
              apm -> setCrtRecheckInterval(apm -> getRecheckInterval());
            } catch (runtime_error &err) {
              logger(WARNING, err.what());
              logger(WARNING, "Increasing the time interval for reloading the configuration...");
              apm -> setCrtRecheckInterval(apm -> getRecheckInterval() * 5);
            }
            crtTime = time(NULL);
            nextRecheck = crtTime + apm -> getCrtRecheckInterval();
            //sleep(apm -> getCrtRecheckInterval());
          }
        }

      } // while

    #ifndef WIN32
      return NULL; // it doesn't matter what we return here
    #else
      return 0;
    #endif
    }

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