<?php
/**
* PHP_Fork class usage examples
* ==================================================================================
* NOTE: In real world you surely want to keep each class into
* a separate file, then include() it into your application.
* For this examples is more useful to keep all_code_into_one_file,
* so that each example shows a unique feature of the PHP_Fork framework.
* ==================================================================================
* action_dispatcher.php
*
* This example shows a multi-process application model built using PHP_Fork.
* Execute-threads makes the work, but they don't use the infinite cycle run();
* work are passed from the parent (console) to pseudo-thread using a remote
* method call (PHP_FORK_VOID_METHOD), simulating the behaviour of a centralized
* calls dispatcher.
*
*
* ATTENTION: this feature of PHP_Fork is highly experimental;
* all things are OK until we run such an example, that does nothing and simply
* sleep() all time waiting for a call. Some experiement with real applications
* seems to show that firing the child process with a signal (that is part of the
* workaround...) causes the process to stop execution, and then to repeat ALL the
* run() method after signal caught... This is not an acceptable behaviour and
* should be tested better.
*
* ==================================================================================
*
* Copyright (c) 2003-2002 by Luca Mariano (luca.mariano@email.it)
* http://www.lucamariano.it
*
* This program is free software. You can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License.
*/
// Import of base class
require_once ("../Fork.php");
// Import of PEAR Mail class
require_once ("Mail.php");
// number of executeThreads we want
define ("NUM_THREAD", 10);
// SMTP host to use for mailing
define ("SMTP_TEST_HOST", "smtp.consulenti.csi.it");
// The example will send a lot of mails to this address, so keep sure it's one of yours...
define ("MAIL_RECIPIENT", "luca.mariano@consulenti.csi.it");
// this is needed as PHP 4.3 in order to use pcntl_signal()
declare (ticks = 1);
/**
*
* executeThread class inherit from PHP_Fork and must redefine the run() method
* all the code contained into the run() method will be executed only by the child
* process; all other methods that you define will be accessible both to the parent
* and to the child (and will be executed into the relative process)
*/
class executeThread extends PHP_Fork {
function executeThread($name)
{
$this->PHP_Fork($name);
}
function run()
{
// this thread sits sleeping until the dispatcher pass some work to it...
while (true) {
sleep(60);
}
}
function sendMail($msgObj)
{
if ($this->_isChild) {
$msgObj = &$msgObj[0];
// to have a feedback of pseudo-thread cuncurrency level
$msgObj['subject'] .= " posted at " . getmicrotime() . " from " . $this->getName();
srand((double)microtime() * 1000000);
$params["host"] = "smtp.consulenti.csi.it";
$mail = &Mail::factory ("smtp", $params);
$headers['From'] = $msgObj['from'];
$headers['To'] = $msgObj['to'];
$headers['Subject'] = $msgObj['subject'] . "(" . rand(0, 100000) . ")" ;
$mail->send($msgObj['to'], $headers, $msgObj['body'] . "\n" . rand(0, 100000));
}
/**
* Never change this line, it requires no adjustments...
*/
else return $this->register_callback_func(func_get_args(), __FUNCTION__);
}
}
/**
* Functions used by the console
*/
function _getInputCLI()
{
$opt = _read();
$opt = strtoupper (trim($opt));
return $opt;
}
function _read()
{
$fp = fopen("php://stdin", "r");
$input = fgets($fp, 255);
fclose($fp);
return $input;
}
function getmicrotime()
{
list($usec, $sec) = explode(" ", microtime());
return ((float)$usec + (float)$sec);
}
/**
* Main program. Bring up n instances of the executeThread class that
* runs concurrently. It's a multi-thread app with a few lines of code!!!
*/
for ($i = 0;$i < NUM_THREAD;$i++) {
$executeThread[$i] = &new executeThread ("executeThread-" . $i);
$executeThread[$i]->start();
echo "Started " . $executeThread[$i]->getName() . " with PID " . $executeThread[$i]->getPid() . "...\n";
}
print "This is the main process.\nPress [X] to terminate, [S] tells executeThreads to send " . NUM_THREAD . " mail msgs\n";
/**
* Console simple listener
*/
while (true) {
echo ">";
$opt = _getInputCLI();
echo "\n";
switch ($opt) {
case "X":
// stops all threads
for ($i = 0;$i < NUM_THREAD;$i++) {
$executeThread[$i]->stop();
echo "Stopped " . $executeThread[$i]->getName() . "\n";
}
exit;
break;
case "S":
// compose the mail; here data are fixed, in a real application
// data are read from a DB table (or a socket, a named pipe, etc)
$msgObj = array();
$msgObj['to'] = MAIL_RECIPIENT;
$msgObj['from'] = "foo@foo.it";
$msgObj['subject'] = "PHP_Fork test ";
$msgObj['body'] = "Main program created this message at " . getmicrotime();
echo "Sending mail to " . NUM_THREAD . " addresses...\n";
$time_start = getmicrotime();
// tells all running processes to send the same mail
// in real word we should test if the the process is busy;
// if not, we'll pass to it a $msgObj to process, then we'll remove
// the $msgObj from message queue.
for ($i = 0;$i < NUM_THREAD;$i++) {
$executeThread[$i]->sendMail($msgObj);
}
$time_end = getmicrotime();
$time = $time_end - $time_start;
echo "Done! Elapsed " . $time . ", avg " . (($time / NUM_THREAD) * 1000) . " msecs/msg \n";
break;
}
}
?>
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