/**
* Calculate nextcheck timestamp for an item
*
* the parameter $flexIntervals accepts data in a format:
*
* +------------[;]<----------+
* | |
* ->+-[d/wd[-wd2],hh:mm-hh:mm]-+
*
* d - delay (0-n)
* wd, wd2 - day of week (1-7)
* hh - hours (0-24)
* mm - minutes (0-59)
*
* @param string $interfaceid
* @param string $itemid
* @param int $itemType
* @param int $delay default delay
* @param string $flexIntervals flexible intervals
* @param int $now current timestamp
*
* @return array
*/
function calculateItemNextcheck($interfaceid, $itemid, $itemType, $delay, $flexIntervals, $now)
{
if ($delay == 0) {
$delay = SEC_PER_YEAR;
}
// special processing of active items to see better view in queue
if ($itemType == ITEM_TYPE_ZABBIX_ACTIVE) {
$nextcheck = $now + $delay;
} else {
// try to find the nearest 'nextcheck' value with condition 'now' < 'nextcheck' < 'now' + SEC_PER_YEAR
$arrOfFlexIntervals = explode(';', $flexIntervals);
$t = $now;
$tmax = $now + SEC_PER_YEAR;
$try = 0;
$shift = $itemType == ITEM_TYPE_JMX ? $interfaceid : $itemid;
while ($t < $tmax) {
// calculate 'nextcheck' value for the current interval
$currentDelay = getCurrentDelay($delay, $arrOfFlexIntervals, $t);
$nextcheck = $currentDelay * floor($t / $currentDelay) + $shift % $currentDelay;
if ($try == 0) {
while ($nextcheck <= $t) {
$nextcheck += $currentDelay;
}
} else {
while ($nextcheck < $t) {
$nextcheck += $currentDelay;
}
}
// 'nextcheck' < end of the current interval ?
// the end of the current interval is the beginning of the next interval - 1
if (getNextDelayInterval($arrOfFlexIntervals, $t, $nextInterval) && $nextcheck >= $nextInterval) {
// 'nextcheck' is beyond the current interval
$t = $nextInterval;
$try++;
} else {
break;
}
}
$delay = $currentDelay;
}
return array('nextcheck' => $nextcheck, 'delay' => $delay);
}
/**
* Calculate nextcheck timestamp for an item
*
* the parameter $flexIntervals accepts data in a format:
*
* +------------[;]<----------+
* | |
* ->+-[d/wd[-wd2],hh:mm-hh:mm]-+
*
* d - delay (0-n)
* wd, wd2 - day of week (1-7)
* hh - hours (0-24)
* mm - minutes (0-59)
*
* @param string $seed seed value applied to delay to spread item checks over the delay period
* @param int $itemType
* @param int $delay default delay, can be overridden
* @param string $flexIntervals flexible intervals
* @param int $now current timestamp
*
* @return array
*/
function calculateItemNextcheck($seed, $itemType, $delay, $flexIntervals, $now)
{
// special processing of active items to see better view in queue
if ($itemType == ITEM_TYPE_ZABBIX_ACTIVE) {
if ($delay != 0) {
$nextcheck = $now + $delay;
} else {
$nextcheck = ZBX_JAN_2038;
}
} else {
// try to find the nearest 'nextcheck' value with condition 'now' < 'nextcheck' < 'now' + SEC_PER_YEAR
// if it is not possible to check the item within a year, fail
$arrOfFlexIntervals = explode(';', $flexIntervals);
$t = $now;
$tmax = $now + SEC_PER_YEAR;
$try = 0;
while ($t < $tmax) {
// calculate 'nextcheck' value for the current interval
$currentDelay = getCurrentDelay($delay, $arrOfFlexIntervals, $t);
if ($currentDelay != 0) {
$nextcheck = $currentDelay * floor($t / $currentDelay) + $seed % $currentDelay;
if ($try == 0) {
while ($nextcheck <= $t) {
$nextcheck += $currentDelay;
}
} else {
while ($nextcheck < $t) {
$nextcheck += $currentDelay;
}
}
} else {
$nextcheck = ZBX_JAN_2038;
}
// 'nextcheck' < end of the current interval ?
// the end of the current interval is the beginning of the next interval - 1
if (getNextDelayInterval($arrOfFlexIntervals, $t, $nextInterval) && $nextcheck >= $nextInterval) {
// 'nextcheck' is beyond the current interval
$t = $nextInterval;
$try++;
} else {
break;
}
}
}
return $nextcheck;
}
/**
* Calculate nextcheck timestamp for an item using flexible intervals.
*
* the parameter $flexible_intervals is an array if strings that are in the following format:
*
* +------------[;]<----------+
* | |
* ->+-[d/wd[-wd2],hh:mm-hh:mm]-+
*
* d - delay (0-n)
* wd, wd2 - day of week (1-7)
* hh - hours (0-24)
* mm - minutes (0-59)
*
* @param int $seed seed value applied to delay to spread item checks over the delay period
* @param string $delay default delay, can be overridden
* @param array $flexible_intervals array of flexible intervals
* @param int $now current timestamp
*
* @return int
*/
function calculateItemNextCheck($seed, $delay, $flexible_intervals, $now)
{
/*
* Try to find the nearest 'nextcheck' value with condition 'now' < 'nextcheck' < 'now' + SEC_PER_YEAR
* If it is not possible to check the item within a year, fail.
*/
$t = $now;
$tMax = $now + SEC_PER_YEAR;
$try = 0;
while ($t < $tMax) {
// Calculate 'nextcheck' value for the current interval.
$currentDelay = getCurrentDelay($delay, $flexible_intervals, $t);
if ($currentDelay != 0) {
$nextCheck = $currentDelay * floor($t / $currentDelay) + $seed % $currentDelay;
if ($try == 0) {
while ($nextCheck <= $t) {
$nextCheck += $currentDelay;
}
} else {
while ($nextCheck < $t) {
$nextCheck += $currentDelay;
}
}
} else {
$nextCheck = ZBX_JAN_2038;
}
/*
* Is 'nextcheck' < end of the current interval and the end of the current interval
* is the beginning of the next interval - 1.
*/
if (getNextDelayInterval($flexible_intervals, $t, $nextInterval) && $nextCheck >= $nextInterval) {
// 'nextcheck' is beyond the current interval.
$t = $nextInterval;
$try++;
} else {
break;
}
}
return $nextCheck;
}
