include/poller.php

   1 <?php
   2 if (!file_exists("boot.php") AND (sizeof($_SERVER["argv"]) != 0)) {
   3         $directory = dirname($_SERVER["argv"][0]);
   4
   5         if (substr($directory, 0, 1) != "/")
   6                 $directory = $_SERVER["PWD"]."/".$directory;
   7
   8         $directory = realpath($directory."/..");
   9
  10         chdir($directory);
  11 }
  12
  13 use \Friendica\Core\Config;
  14
  15 require_once("boot.php");
  16
  17 function poller_run($argv, $argc){
  18         global $a, $db;
  19
  20         if(is_null($a)) {
  21                 $a = new App;
  22         }
  23
  24         if(is_null($db)) {
  25                 @include(".htconfig.php");
  26                 require_once("include/dba.php");
  27                 $db = new dba($db_host, $db_user, $db_pass, $db_data);
  28                 unset($db_host, $db_user, $db_pass, $db_data);
  29         };
  30
  31         Config::load();
  32
  33         // Quit when in maintenance
  34         if (Config::get('system', 'maintenance', true)) {
  35                 return;
  36         }
  37
  38         $a->set_baseurl(Config::get('system', 'url'));
  39
  40         load_hooks();
  41
  42         $a->start_process();
  43
  44         if (poller_max_connections_reached()) {
  45                 return;
  46         }
  47
  48         if ($a->maxload_reached()) {
  49                 return;
  50         }
  51
  52         if(($argc <= 1) OR ($argv[1] != "no_cron")) {
  53                 poller_run_cron();
  54         }
  55
  56         if ($a->max_processes_reached()) {
  57                 return;
  58         }
  59
  60         // Checking the number of workers
  61         if (poller_too_much_workers()) {
  62                 poller_kill_stale_workers();
  63                 return;
  64         }
  65
  66         $starttime = time();
  67
  68         while ($r = poller_worker_process()) {
  69
  70                 // Count active workers and compare them with a maximum value that depends on the load
  71                 if (poller_too_much_workers()) {
  72                         return;
  73                 }
  74
  75                 if (!poller_execute($r[0])) {
  76                         return;
  77                 }
  78
  79                 // Quit the poller once every hour
  80                 if (time() > ($starttime + 3600))
  81                         return;
  82         }
  83
  84 }
  85
  86 /**
  87  * @brief Execute a worker entry
  88  *
  89  * @param array $queue Workerqueue entry
  90  *
  91  * @return boolean "true" if further processing should be stopped
  92  */
  93 function poller_execute($queue) {
  94
  95         $a = get_app();
  96
  97         $mypid = getmypid();
  98
  99         // Quit when in maintenance
 100         if (Config::get('system', 'maintenance', true)) {
 101                 return false;
 102         }
 103
 104         // Constantly check the number of parallel database processes
 105         if ($a->max_processes_reached()) {
 106                 return false;
 107         }
 108
 109         // Constantly check the number of available database connections to let the frontend be accessible at any time
 110         if (poller_max_connections_reached()) {
 111                 return false;
 112         }
 113
 114         $upd = q("UPDATE `workerqueue` SET `executed` = '%s', `pid` = %d WHERE `id` = %d AND `pid` = 0",
 115                 dbesc(datetime_convert()),
 116                 intval($mypid),
 117                 intval($queue["id"]));
 118
 119         if (!$upd) {
 120                 logger("Couldn't update queue entry ".$queue["id"]." - skip this execution", LOGGER_DEBUG);
 121                 q("COMMIT");
 122                 return true;
 123         }
 124
 125         // Assure that there are no tasks executed twice
 126         $id = q("SELECT `pid`, `executed` FROM `workerqueue` WHERE `id` = %d", intval($queue["id"]));
 127         if (!$id) {
 128                 logger("Queue item ".$queue["id"]." vanished - skip this execution", LOGGER_DEBUG);
 129                 q("COMMIT");
 130                 return true;
 131         } elseif ((strtotime($id[0]["executed"]) <= 0) OR ($id[0]["pid"] == 0)) {
 132                 logger("Entry for queue item ".$queue["id"]." wasn't stored - skip this execution", LOGGER_DEBUG);
 133                 q("COMMIT");
 134                 return true;
 135         } elseif ($id[0]["pid"] != $mypid) {
 136                 logger("Queue item ".$queue["id"]." is to be executed by process ".$id[0]["pid"]." and not by me (".$mypid.") - skip this execution", LOGGER_DEBUG);
 137                 q("COMMIT");
 138                 return true;
 139         }
 140         q("COMMIT");
 141
 142         $argv = json_decode($queue["parameter"]);
 143
 144         // Check for existance and validity of the include file
 145         $include = $argv[0];
 146
 147         if (!validate_include($include)) {
 148                 logger("Include file ".$argv[0]." is not valid!");
 149                 q("DELETE FROM `workerqueue` WHERE `id` = %d", intval($queue["id"]));
 150                 return true;
 151         }
 152
 153         require_once($include);
 154
 155         $funcname = str_replace(".php", "", basename($argv[0]))."_run";
 156
 157         if (function_exists($funcname)) {
 158
 159                 poller_exec_function($queue, $funcname, $argv);
 160
 161                 q("DELETE FROM `workerqueue` WHERE `id` = %d", intval($queue["id"]));
 162         } else {
 163                 logger("Function ".$funcname." does not exist");
 164         }
 165
 166         return true;
 167 }
 168
 169 /**
 170  * @brief Execute a function from the queue
 171  *
 172  * @param array $queue Workerqueue entry
 173  * @param string $funcname name of the function
 174  * @param array $argv Array of values to be passed to the function
 175  */
 176 function poller_exec_function($queue, $funcname, $argv) {
 177
 178         $a = get_app();
 179
 180         $mypid = getmypid();
 181
 182         $argc = count($argv);
 183
 184         logger("Process ".$mypid." - Prio ".$queue["priority"]." - ID ".$queue["id"].": ".$funcname." ".$queue["parameter"]);
 185
 186         $stamp = (float)microtime(true);
 187
 188         // We use the callstack here to analyze the performance of executed worker entries.
 189         // For this reason the variables have to be initialized.
 190         if (Config::get("system", "profiler")) {
 191                 $a->performance["start"] = microtime(true);
 192                 $a->performance["database"] = 0;
 193                 $a->performance["database_write"] = 0;
 194                 $a->performance["network"] = 0;
 195                 $a->performance["file"] = 0;
 196                 $a->performance["rendering"] = 0;
 197                 $a->performance["parser"] = 0;
 198                 $a->performance["marktime"] = 0;
 199                 $a->performance["markstart"] = microtime(true);
 200                 $a->callstack = array();
 201         }
 202
 203         // For better logging create a new process id for every worker call
 204         // But preserve the old one for the worker
 205         $old_process_id = $a->process_id;
 206         $a->process_id = uniqid("wrk", true);
 207
 208         $funcname($argv, $argc);
 209
 210         $a->process_id = $old_process_id;
 211
 212         $duration = number_format(microtime(true) - $stamp, 3);
 213
 214         if ($duration > 3600) {
 215                 logger("Prio ".$queue["priority"].": ".$queue["parameter"]." - longer than 1 hour (".round($duration/60, 3).")", LOGGER_DEBUG);
 216         } elseif ($duration > 600) {
 217                 logger("Prio ".$queue["priority"].": ".$queue["parameter"]." - longer than 10 minutes (".round($duration/60, 3).")", LOGGER_DEBUG);
 218         } elseif ($duration > 300) {
 219                 logger("Prio ".$queue["priority"].": ".$queue["parameter"]." - longer than 5 minutes (".round($duration/60, 3).")", LOGGER_DEBUG);
 220         } elseif ($duration > 120) {
 221                 logger("Prio ".$queue["priority"].": ".$queue["parameter"]." - longer than 2 minutes (".round($duration/60, 3).")", LOGGER_DEBUG);
 222         }
 223
 224         logger("Process ".$mypid." - Prio ".$queue["priority"]." - ID ".$queue["id"].": ".$funcname." - done in ".$duration." seconds.");
 225
 226         // Write down the performance values into the log
 227         if (Config::get("system", "profiler")) {
 228                 $duration = microtime(true)-$a->performance["start"];
 229
 230                 if (Config::get("rendertime", "callstack")) {
 231                         if (isset($a->callstack["database"])) {
 232                                 $o = "\nDatabase Read:\n";
 233                                 foreach ($a->callstack["database"] AS $func => $time) {
 234                                         $time = round($time, 3);
 235                                         if ($time > 0)
 236                                                 $o .= $func.": ".$time."\n";
 237                                 }
 238                         }
 239                         if (isset($a->callstack["database_write"])) {
 240                                 $o .= "\nDatabase Write:\n";
 241                                 foreach ($a->callstack["database_write"] AS $func => $time) {
 242                                         $time = round($time, 3);
 243                                         if ($time > 0)
 244                                                 $o .= $func.": ".$time."\n";
 245                                 }
 246                         }
 247                         if (isset($a->callstack["network"])) {
 248                                 $o .= "\nNetwork:\n";
 249                                 foreach ($a->callstack["network"] AS $func => $time) {
 250                                         $time = round($time, 3);
 251                                         if ($time > 0)
 252                                                 $o .= $func.": ".$time."\n";
 253                                 }
 254                         }
 255                 } else {
 256                         $o = '';
 257                 }
 258
 259                 logger("ID ".$queue["id"].": ".$funcname.": ".sprintf("DB: %s/%s, Net: %s, I/O: %s, Other: %s, Total: %s".$o,
 260                         number_format($a->performance["database"] - $a->performance["database_write"], 2),
 261                         number_format($a->performance["database_write"], 2),
 262                         number_format($a->performance["network"], 2),
 263                         number_format($a->performance["file"], 2),
 264                         number_format($duration - ($a->performance["database"] + $a->performance["network"] + $a->performance["file"]), 2),
 265                         number_format($duration, 2)),
 266                         LOGGER_DEBUG);
 267         }
 268
 269         $cooldown = Config::get("system", "worker_cooldown", 0);
 270
 271         if ($cooldown > 0) {
 272                 logger("Process ".$mypid." - Prio ".$queue["priority"]." - ID ".$queue["id"].": ".$funcname." - in cooldown for ".$cooldown." seconds");
 273                 sleep($cooldown);
 274         }
 275 }
 276
 277 /**
 278  * @brief Checks if the number of database connections has reached a critical limit.
 279  *
 280  * @return bool Are more than 3/4 of the maximum connections used?
 281  */
 282 function poller_max_connections_reached() {
 283
 284         // Fetch the max value from the config. This is needed when the system cannot detect the correct value by itself.
 285         $max = Config::get("system", "max_connections");
 286
 287         // Fetch the percentage level where the poller will get active
 288         $maxlevel = Config::get("system", "max_connections_level", 75);
 289
 290         if ($max == 0) {
 291                 // the maximum number of possible user connections can be a system variable
 292                 $r = q("SHOW VARIABLES WHERE `variable_name` = 'max_user_connections'");
 293                 if ($r)
 294                         $max = $r[0]["Value"];
 295
 296                 // Or it can be granted. This overrides the system variable
 297                 $r = q("SHOW GRANTS");
 298                 if ($r)
 299                         foreach ($r AS $grants) {
 300                                 $grant = array_pop($grants);
 301                                 if (stristr($grant, "GRANT USAGE ON"))
 302                                         if (preg_match("/WITH MAX_USER_CONNECTIONS (\d*)/", $grant, $match))
 303                                                 $max = $match[1];
 304                         }
 305         }
 306
 307         // If $max is set we will use the processlist to determine the current number of connections
 308         // The processlist only shows entries of the current user
 309         if ($max != 0) {
 310                 $r = q("SHOW PROCESSLIST");
 311                 if (!dbm::is_result($r))
 312                         return false;
 313
 314                 $used = count($r);
 315
 316                 logger("Connection usage (user values): ".$used."/".$max, LOGGER_DEBUG);
 317
 318                 $level = ($used / $max) * 100;
 319
 320                 if ($level >= $maxlevel) {
 321                         logger("Maximum level (".$maxlevel."%) of user connections reached: ".$used."/".$max);
 322                         return true;
 323                 }
 324         }
 325
 326         // We will now check for the system values.
 327         // This limit could be reached although the user limits are fine.
 328         $r = q("SHOW VARIABLES WHERE `variable_name` = 'max_connections'");
 329         if (!$r)
 330                 return false;
 331
 332         $max = intval($r[0]["Value"]);
 333         if ($max == 0)
 334                 return false;
 335
 336         $r = q("SHOW STATUS WHERE `variable_name` = 'Threads_connected'");
 337         if (!$r)
 338                 return false;
 339
 340         $used = intval($r[0]["Value"]);
 341         if ($used == 0)
 342                 return false;
 343
 344         logger("Connection usage (system values): ".$used."/".$max, LOGGER_DEBUG);
 345
 346         $level = $used / $max * 100;
 347
 348         if ($level < $maxlevel)
 349                 return false;
 350
 351         logger("Maximum level (".$level."%) of system connections reached: ".$used."/".$max);
 352         return true;
 353 }
 354
 355 /**
 356  * @brief fix the queue entry if the worker process died
 357  *
 358  */
 359 function poller_kill_stale_workers() {
 360         $r = q("SELECT `pid`, `executed`, `priority`, `parameter` FROM `workerqueue` WHERE `executed` > '%s'", dbesc(NULL_DATE));
 361
 362         if (!dbm::is_result($r)) {
 363                 // No processing here needed
 364                 return;
 365         }
 366
 367         foreach ($r AS $pid) {
 368                 if (!posix_kill($pid["pid"], 0)) {
 369                         q("UPDATE `workerqueue` SET `executed` = '%s', `pid` = 0 WHERE `pid` = %d",
 370                                 dbesc(NULL_DATE), intval($pid["pid"]));
 371                 } else {
 372                         // Kill long running processes
 373
 374                         // Check if the priority is in a valid range
 375                         if (!in_array($pid["priority"], array(PRIORITY_CRITICAL, PRIORITY_HIGH, PRIORITY_MEDIUM, PRIORITY_LOW, PRIORITY_NEGLIGIBLE)))
 376                                 $pid["priority"] = PRIORITY_MEDIUM;
 377
 378                         // Define the maximum durations
 379                         $max_duration_defaults = array(PRIORITY_CRITICAL => 360, PRIORITY_HIGH => 10, PRIORITY_MEDIUM => 60, PRIORITY_LOW => 180, PRIORITY_NEGLIGIBLE => 360);
 380                         $max_duration = $max_duration_defaults[$pid["priority"]];
 381
 382                         $argv = json_decode($pid["parameter"]);
 383                         $argv[0] = basename($argv[0]);
 384
 385                         // How long is the process already running?
 386                         $duration = (time() - strtotime($pid["executed"])) / 60;
 387                         if ($duration > $max_duration) {
 388                                 logger("Worker process ".$pid["pid"]." (".implode(" ", $argv).") took more than ".$max_duration." minutes. It will be killed now.");
 389                                 posix_kill($pid["pid"], SIGTERM);
 390
 391                                 // We killed the stale process.
 392                                 // To avoid a blocking situation we reschedule the process at the beginning of the queue.
 393                                 // Additionally we are lowering the priority.
 394                                 q("UPDATE `workerqueue` SET `executed` = '%s', `created` = '%s',
 395                                                         `priority` = %d, `pid` = 0 WHERE `pid` = %d",
 396                                         dbesc(NULL_DATE),
 397                                         dbesc(datetime_convert()),
 398                                         intval(PRIORITY_NEGLIGIBLE),
 399                                         intval($pid["pid"]));
 400                         } else {
 401                                 logger("Worker process ".$pid["pid"]." (".implode(" ", $argv).") now runs for ".round($duration)." of ".$max_duration." allowed minutes. That's okay.", LOGGER_DEBUG);
 402                         }
 403                 }
 404         }
 405 }
 406
 407 /**
 408  * @brief Checks if the number of active workers exceeds the given limits
 409  *
 410  * @return bool Are there too much workers running?
 411  */
 412 function poller_too_much_workers() {
 413         $queues = Config::get("system", "worker_queues", 4);
 414
 415         $maxqueues = $queues;
 416
 417         $active = poller_active_workers();
 418
 419         // Decrease the number of workers at higher load
 420         $load = current_load();
 421         if($load) {
 422                 $maxsysload = intval(Config::get("system", "maxloadavg", 50));
 423
 424                 $maxworkers = $queues;
 425
 426                 // Some magical mathemathics to reduce the workers
 427                 $exponent = 3;
 428                 $slope = $maxworkers / pow($maxsysload, $exponent);
 429                 $queues = ceil($slope * pow(max(0, $maxsysload - $load), $exponent));
 430
 431                 $s = q("SELECT COUNT(*) AS `total` FROM `workerqueue` WHERE `executed` <= '%s'", dbesc(NULL_DATE));
 432                 $entries = $s[0]["total"];
 433
 434                 if (Config::get("system", "worker_fastlane", false) AND ($queues > 0) AND ($entries > 0) AND ($active >= $queues)) {
 435                         $s = q("SELECT `priority` FROM `workerqueue` WHERE `executed` <= '%s' ORDER BY `priority` LIMIT 1", dbesc(NULL_DATE));
 436                         $top_priority = $s[0]["priority"];
 437
 438                         $s = q("SELECT `id` FROM `workerqueue` WHERE `priority` <= %d AND `executed` > '%s' LIMIT 1",
 439                                 intval($top_priority), dbesc(NULL_DATE));
 440                         $high_running = dbm::is_result($s);
 441
 442                         if (!$high_running AND ($top_priority > PRIORITY_UNDEFINED) AND ($top_priority < PRIORITY_NEGLIGIBLE)) {
 443                                 logger("There are jobs with priority ".$top_priority." waiting but none is executed. Open a fastlane.", LOGGER_DEBUG);
 444                                 $queues = $active + 1;
 445                         }
 446                 }
 447
 448                 // Create a list of queue entries grouped by their priority
 449                 $running = array(PRIORITY_CRITICAL => 0,
 450                                 PRIORITY_HIGH => 0,
 451                                 PRIORITY_MEDIUM => 0,
 452                                 PRIORITY_LOW => 0,
 453                                 PRIORITY_NEGLIGIBLE => 0);
 454
 455                 $r = q("SELECT COUNT(*) AS `running`, `priority` FROM `process` INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid` GROUP BY `priority`");
 456                 if (dbm::is_result($r))
 457                         foreach ($r AS $process)
 458                                 $running[$process["priority"]] = $process["running"];
 459
 460                 $processlist = "";
 461                 $r = q("SELECT COUNT(*) AS `entries`, `priority` FROM `workerqueue` GROUP BY `priority`");
 462                 if (dbm::is_result($r))
 463                         foreach ($r as $entry) {
 464                                 if ($processlist != "")
 465                                         $processlist .= ", ";
 466                                 $processlist .= $entry["priority"].":".$running[$entry["priority"]]."/".$entry["entries"];
 467                         }
 468
 469                 logger("Load: ".$load."/".$maxsysload." - processes: ".$active."/".$entries." (".$processlist.") - maximum: ".$queues."/".$maxqueues, LOGGER_DEBUG);
 470
 471                 // Are there fewer workers running as possible? Then fork a new one.
 472                 if (!Config::get("system", "worker_dont_fork") AND ($queues > ($active + 1)) AND ($entries > 1)) {
 473                         logger("Active workers: ".$active."/".$queues." Fork a new worker.", LOGGER_DEBUG);
 474                         $args = array("include/poller.php", "no_cron");
 475                         $a = get_app();
 476                         $a->proc_run($args);
 477                 }
 478         }
 479
 480         return($active >= $queues);
 481 }
 482
 483 /**
 484  * @brief Returns the number of active poller processes
 485  *
 486  * @return integer Number of active poller processes
 487  */
 488 function poller_active_workers() {
 489         $workers = q("SELECT COUNT(*) AS `processes` FROM `process` WHERE `command` = 'poller.php'");
 490
 491         return($workers[0]["processes"]);
 492 }
 493
 494 /**
 495  * @brief Check if we should pass some slow processes
 496  *
 497  * When the active processes of the highest priority are using more than 2/3
 498  * of all processes, we let pass slower processes.
 499  *
 500  * @param string $highest_priority Returns the currently highest priority
 501  * @return bool We let pass a slower process than $highest_priority
 502  */
 503 function poller_passing_slow(&$highest_priority) {
 504
 505         $highest_priority = 0;
 506
 507         $r = q("SELECT `priority`
 508                 FROM `process`
 509                 INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid`");
 510
 511         // No active processes at all? Fine
 512         if (!dbm::is_result($r))
 513                 return(false);
 514
 515         $priorities = array();
 516         foreach ($r AS $line)
 517                 $priorities[] = $line["priority"];
 518
 519         // Should not happen
 520         if (count($priorities) == 0)
 521                 return(false);
 522
 523         $highest_priority = min($priorities);
 524
 525         // The highest process is already the slowest one?
 526         // Then we quit
 527         if ($highest_priority == PRIORITY_NEGLIGIBLE)
 528                 return(false);
 529
 530         $high = 0;
 531         foreach ($priorities AS $priority)
 532                 if ($priority == $highest_priority)
 533                         ++$high;
 534
 535         logger("Highest priority: ".$highest_priority." Total processes: ".count($priorities)." Count high priority processes: ".$high, LOGGER_DEBUG);
 536         $passing_slow = (($high/count($priorities)) > (2/3));
 537
 538         if ($passing_slow)
 539                 logger("Passing slower processes than priority ".$highest_priority, LOGGER_DEBUG);
 540
 541         return($passing_slow);
 542 }
 543
 544 /**
 545  * @brief Returns the next worker process
 546  *
 547  * @return string SQL statement
 548  */
 549 function poller_worker_process() {
 550
 551         q("START TRANSACTION;");
 552
 553         // Check if we should pass some low priority process
 554         $highest_priority = 0;
 555
 556         if (poller_passing_slow($highest_priority)) {
 557                 // Are there waiting processes with a higher priority than the currently highest?
 558                 $r = q("SELECT * FROM `workerqueue`
 559                                 WHERE `executed` <= '%s' AND `priority` < %d
 560                                 ORDER BY `priority`, `created` LIMIT 1",
 561                                 dbesc(NULL_DATE),
 562                                 intval($highest_priority));
 563                 if (dbm::is_result($r)) {
 564                         return $r;
 565                 }
 566                 // Give slower processes some processing time
 567                 $r = q("SELECT * FROM `workerqueue`
 568                                 WHERE `executed` <= '%s' AND `priority` > %d
 569                                 ORDER BY `priority`, `created` LIMIT 1",
 570                                 dbesc(NULL_DATE),
 571                                 intval($highest_priority));
 572         }
 573
 574         // If there is no result (or we shouldn't pass lower processes) we check without priority limit
 575         if (($highest_priority == 0) OR !dbm::is_result($r)) {
 576                 $r = q("SELECT * FROM `workerqueue` WHERE `executed` <= '%s' ORDER BY `priority`, `created` LIMIT 1", dbesc(NULL_DATE));
 577         }
 578         return $r;
 579 }
 580
 581 /**
 582  * @brief Call the front end worker
 583  */
 584 function call_worker() {
 585         if (!Config::get("system", "frontend_worker")) {
 586                 return;
 587         }
 588
 589         $url = App::get_baseurl()."/worker";
 590         fetch_url($url, false, $redirects, 1);
 591 }
 592
 593 /**
 594  * @brief Call the front end worker if there aren't any active
 595  */
 596 function call_worker_if_idle() {
 597         if (!Config::get("system", "frontend_worker")) {
 598                 return;
 599         }
 600
 601         // Do we have "proc_open"? Then we can fork the poller
 602         if (function_exists("proc_open")) {
 603                 // When was the last time that we called the worker?
 604                 // Less than one minute? Then we quit
 605                 if ((time() - Config::get("system", "worker_started")) < 60) {
 606                         return;
 607                 }
 608
 609                 set_config("system", "worker_started", time());
 610
 611                 // Do we have enough running workers? Then we quit here.
 612                 if (poller_too_much_workers()) {
 613                         // Cleaning dead processes
 614                         poller_kill_stale_workers();
 615                         get_app()->remove_inactive_processes();
 616
 617                         return;
 618                 }
 619
 620                 poller_run_cron();
 621
 622                 logger('Call poller', LOGGER_DEBUG);
 623
 624                 $args = array("include/poller.php", "no_cron");
 625                 $a = get_app();
 626                 $a->proc_run($args);
 627                 return;
 628         }
 629
 630         // We cannot execute background processes.
 631         // We now run the processes from the frontend.
 632         // This won't work with long running processes.
 633         poller_run_cron();
 634
 635         clear_worker_processes();
 636
 637         $workers = q("SELECT COUNT(*) AS `processes` FROM `process` WHERE `command` = 'worker.php'");
 638
 639         if ($workers[0]["processes"] == 0) {
 640                 call_worker();
 641         }
 642 }
 643
 644 /**
 645  * @brief Removes long running worker processes
 646  */
 647 function clear_worker_processes() {
 648         $timeout = Config::get("system", "frontend_worker_timeout", 10);
 649
 650         /// @todo We should clean up the corresponding workerqueue entries as well
 651         q("DELETE FROM `process` WHERE `created` < '%s' AND `command` = 'worker.php'",
 652                 dbesc(datetime_convert('UTC','UTC',"now - ".$timeout." minutes")));
 653 }
 654
 655 /**
 656  * @brief Runs the cron processes
 657  */
 658 function poller_run_cron() {
 659         logger('Add cron entries', LOGGER_DEBUG);
 660
 661         // Check for spooled items
 662         proc_run(PRIORITY_HIGH, "include/spool_post.php");
 663
 664         // Run the cron job that calls all other jobs
 665         proc_run(PRIORITY_MEDIUM, "include/cron.php");
 666
 667         // Run the cronhooks job separately from cron for being able to use a different timing
 668         proc_run(PRIORITY_MEDIUM, "include/cronhooks.php");
 669
 670         // Cleaning dead processes
 671         poller_kill_stale_workers();
 672 }
 673
 674 if (array_search(__file__,get_included_files())===0){
 675         poller_run($_SERVER["argv"],$_SERVER["argc"]);
 676
 677         get_app()->end_process();
 678
 679         killme();
 680 }
 681 ?>