Adiciona timeout forçado na coleta de impressoras

Eduardo Santos
1 parent ffdf73eb
Showing 2 changed files with 98 additions and 4 deletions Show diff stats
Controller/PrinterController.php
Resources/scripts/timeout3
@@ -612,13 +612,13 @@ class PrinterController extends Controller
     {
         $n_printers = $this->em->createQuery('SELECT count(p) FROM CocarBundle:Printer p')->getSingleScalarResult();
-        $limit = 500;
+        $limit = 20;
         $iterations = (int)($n_printers / $limit);
         $iterations = $iterations + 1;
         $i = 0;
         while ($i < $iterations) {
-            // O objetivo é executar a coleta a cada 1000 impressoras
+            // O objetivo é executar a coleta a cada $limit impressoras
             $offset = $limit * $i;
             $this->selectPrinters($limit, $offset);
             $i = $i + 1;
@@ -653,9 +653,12 @@ class PrinterController extends Controller
                 $community = $printer->getCommunitySnmpPrinter();
                 $host = $printer->getHost();
-                $this->get('logger')->info("Coletando impressora $host | ID ".$printer->getId());
+				$this->get('logger')->info("Coletando impressora $host | ID ".$printer->getId());
+				$arrBundle = $this->get('kernel')->getBundles();
+				$rootDir = $arrBundle['CocarBundle']->getPath();
+				$script = $rootDir . "/Resources/scripts/timeout3";
-                $com = "snmpwalk -O qv -v 1 -c $community $host 1.3.6.1.2.1.43.10.2.1.4.1.1";
+                $com = "$script snmpwalk -O qv -v 1 -c $community $host 1.3.6.1.2.1.43.10.2.1.4.1.1";
                 if($outPut = shell_exec($com))
                 {
@@ -0,0 +1,91 @@
+#!/bin/bash
+#
+# The Bash shell script executes a command with a time-out.
+# Upon time-out expiration SIGTERM (15) is sent to the process. If the signal
+# is blocked, then the subsequent SIGKILL (9) terminates it.
+#
+# Based on the Bash documentation example.
+
+# Hello Chet,
+# please find attached a "little easier"  :-)  to comprehend
+# time-out example.  If you find it suitable, feel free to include
+# anywhere: the very same logic as in the original examples/scripts, a
+# little more transparent implementation to my taste.
+#
+# Dmitry V Golovashkin <Dmitry.Golovashkin@sas.com>
+
+scriptName="${0##*/}"
+
+declare -i DEFAULT_TIMEOUT=9
+declare -i DEFAULT_INTERVAL=1
+declare -i DEFAULT_DELAY=1
+
+# Timeout.
+declare -i timeout=DEFAULT_TIMEOUT
+# Interval between checks if the process is still alive.
+declare -i interval=DEFAULT_INTERVAL
+# Delay between posting the SIGTERM signal and destroying the process by SIGKILL.
+declare -i delay=DEFAULT_DELAY
+
+function printUsage() {
+    cat <<EOF
+
+Synopsis
+    $scriptName [-t timeout] [-i interval] [-d delay] command
+    Execute a command with a time-out.
+    Upon time-out expiration SIGTERM (15) is sent to the process. If SIGTERM
+    signal is blocked, then the subsequent SIGKILL (9) terminates it.
+
+    -t timeout
+        Number of seconds to wait for command completion.
+        Default value: $DEFAULT_TIMEOUT seconds.
+
+    -i interval
+        Interval between checks if the process is still alive.
+        Positive integer, default value: $DEFAULT_INTERVAL seconds.
+
+    -d delay
+        Delay between posting the SIGTERM signal and destroying the
+        process by SIGKILL. Default value: $DEFAULT_DELAY seconds.
+
+As of today, Bash does not support floating point arithmetic (sleep does),
+therefore all delay/time values must be integers.
+EOF
+}
+
+# Options.
+while getopts ":t:i:d:" option; do
+    case "$option" in
+        t) timeout=$OPTARG ;;
+        i) interval=$OPTARG ;;
+        d) delay=$OPTARG ;;
+        *) printUsage; exit 1 ;;
+    esac
+done
+shift $((OPTIND - 1))
+
+# $# should be at least 1 (the command to execute), however it may be strictly
+# greater than 1 if the command itself has options.
+if (($# == 0 || interval <= 0)); then
+    printUsage
+    exit 1
+fi
+
+# kill -0 pid   Exit code indicates if a signal may be sent to $pid process.
+(
+    ((t = timeout))
+
+    while ((t > 0)); do
+        sleep $interval
+        kill -0 $$ || exit 0
+        ((t -= interval))
+    done
+
+    # Be nice, post SIGTERM first.
+    # The 'exit 0' below will be executed if any preceeding command fails.
+    kill -s SIGTERM $$ && kill -0 $$ || exit 0
+    sleep $delay
+    kill -s SIGKILL $$
+) 2> /dev/null &
+
+exec "$@"
@@ -0,0 +1,91 @@		@@ -0,0 +1,91 @@
	1	+#!/bin/bash
	2	+#
	3	+# The Bash shell script executes a command with a time-out.
	4	+# Upon time-out expiration SIGTERM (15) is sent to the process. If the signal
	5	+# is blocked, then the subsequent SIGKILL (9) terminates it.
	6	+#
	7	+# Based on the Bash documentation example.
	8	+
	9	+# Hello Chet,
	10	+# please find attached a "little easier" :-) to comprehend
	11	+# time-out example. If you find it suitable, feel free to include
	12	+# anywhere: the very same logic as in the original examples/scripts, a
	13	+# little more transparent implementation to my taste.
	14	+#
	15	+# Dmitry V Golovashkin <Dmitry.Golovashkin@sas.com>
	16	+
	17	+scriptName="${0##*/}"
	18	+
	19	+declare -i DEFAULT_TIMEOUT=9
	20	+declare -i DEFAULT_INTERVAL=1
	21	+declare -i DEFAULT_DELAY=1
	22	+
	23	+# Timeout.
	24	+declare -i timeout=DEFAULT_TIMEOUT
	25	+# Interval between checks if the process is still alive.
	26	+declare -i interval=DEFAULT_INTERVAL
	27	+# Delay between posting the SIGTERM signal and destroying the process by SIGKILL.
	28	+declare -i delay=DEFAULT_DELAY
	29	+
	30	+function printUsage() {
	31	+ cat <<EOF
	32	+
	33	+Synopsis
	34	+ $scriptName [-t timeout] [-i interval] [-d delay] command
	35	+ Execute a command with a time-out.
	36	+ Upon time-out expiration SIGTERM (15) is sent to the process. If SIGTERM
	37	+ signal is blocked, then the subsequent SIGKILL (9) terminates it.
	38	+
	39	+ -t timeout
	40	+ Number of seconds to wait for command completion.
	41	+ Default value: $DEFAULT_TIMEOUT seconds.
	42	+
	43	+ -i interval
	44	+ Interval between checks if the process is still alive.
	45	+ Positive integer, default value: $DEFAULT_INTERVAL seconds.
	46	+
	47	+ -d delay
	48	+ Delay between posting the SIGTERM signal and destroying the
	49	+ process by SIGKILL. Default value: $DEFAULT_DELAY seconds.
	50	+
	51	+As of today, Bash does not support floating point arithmetic (sleep does),
	52	+therefore all delay/time values must be integers.
	53	+EOF
	54	+}
	55	+
	56	+# Options.
	57	+while getopts ":t:i:d:" option; do
	58	+ case "$option" in
	59	+ t) timeout=$OPTARG ;;
	60	+ i) interval=$OPTARG ;;
	61	+ d) delay=$OPTARG ;;
	62	+ *) printUsage; exit 1 ;;
	63	+ esac
	64	+done
	65	+shift $((OPTIND - 1))
	66	+
	67	+# $# should be at least 1 (the command to execute), however it may be strictly
	68	+# greater than 1 if the command itself has options.
	69	+if (($# == 0 \|\| interval <= 0)); then
	70	+ printUsage
	71	+ exit 1
	72	+fi
	73	+
	74	+# kill -0 pid Exit code indicates if a signal may be sent to $pid process.
	75	+(
	76	+ ((t = timeout))
	77	+
	78	+ while ((t > 0)); do
	79	+ sleep $interval
	80	+ kill -0 $$ \|\| exit 0
	81	+ ((t -= interval))
	82	+ done
	83	+
	84	+ # Be nice, post SIGTERM first.
	85	+ # The 'exit 0' below will be executed if any preceeding command fails.
	86	+ kill -s SIGTERM $$ && kill -0 $$ \|\| exit 0
	87	+ sleep $delay
	88	+ kill -s SIGKILL $$
	89	+) 2> /dev/null &
	90	+
	91	+exec "$@"