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Add child process management for polling updates

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netkas 2024-11-04 22:04:58 -05:00
parent 87f9321280
commit 946e110131
2 changed files with 115 additions and 47 deletions
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156
src/TgBotLib/PollingBot.php
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@ -3,6 +3,7 @@
namespace TgBotLib;
use RuntimeException;
use function RuntimeException;
/**
* PollingBot class that extends Bot for handling updates using polling.
@ -14,6 +15,7 @@
private int $timeout;
private array $allowedUpdates;
private bool $fork;
private array $childPids;
/**
* Constructor for the class, initializing with a Bot instance.
@ -29,6 +31,13 @@
$this->timeout = 0;
$this->allowedUpdates = [];
$this->fork = false;
$this->childPids = [];
// Register signal handler for child processes
if (function_exists('pcntl_signal'))
{
pcntl_signal(SIGCHLD, [$this, 'signalHandler']);
}
}
/**
@ -128,9 +137,9 @@
}
/**
* Sets whether updates should be processed in a forked process
* Sets the fork value.
*
* @param bool $fork
* @param bool $fork The fork value to set.
* @return void
*/
public function setFork(bool $fork): void
@ -139,15 +148,31 @@
}
/**
* Gets the current fork setting
* Retrieves the current fork setting.
*
* @return bool
* @return bool The configured fork value.
*/
public function getFork(): bool
{
return $this->fork;
}
private function signalHandler(int $signal): void
{
if ($signal === SIGCHLD)
{
$i = -1;
while (($pid = pcntl_wait($i, WNOHANG)) > 0)
{
$key = array_search($pid, $this->childPids);
if ($key !== false)
{
unset($this->childPids[$key]);
}
}
}
}
/**
* Handles incoming updates by fetching and processing them with appropriate event handlers.
*
@ -155,6 +180,12 @@
*/
public function handleUpdates(): void
{
// Install signal handler
if ($this->fork && function_exists('pcntl_signal_dispatch'))
{
pcntl_signal_dispatch();
}
$updates = $this->getUpdates(offset: ($this->offset ?: 0), limit: $this->limit, timeout: $this->timeout, allowed_updates: $this->retrieveAllowedUpdates());
if (empty($updates))
@ -162,59 +193,90 @@
return;
}
// Update the offset based on the last update ID
$lastUpdate = end($updates);
if ($lastUpdate->getUpdateId() > ($this->offset ?? 0))
// Track the highest update ID we've seen
$maxUpdateId = null;
foreach ($updates as $update)
{
$this->offset = $lastUpdate->getUpdateId() + 1;
// Update the maximum update ID as we go
if ($maxUpdateId === null || $update->getUpdateId() > $maxUpdateId)
{
$maxUpdateId = $update->getUpdateId();
}
if ($this->fork)
{
// Clean up any finished processes
if (function_exists('pcntl_signal_dispatch'))
{
pcntl_signal_dispatch();
}
$pid = pcntl_fork();
if ($pid == -1)
{
// Fork failed
throw new RuntimeException('Failed to fork process for update handling');
}
elseif ($pid)
{
// Parent process
$this->childPids[] = $pid;
// If we have too many child processes, wait for some to finish
$maxChildren = 32; // Adjust this value based on your system's capabilities
while (count($this->childPids) >= $maxChildren)
{
if (function_exists('pcntl_signal_dispatch'))
{
pcntl_signal_dispatch();
}
usleep(10000); // Sleep for 10ms to prevent CPU hogging
}
}
else
{
// Child process
try
{
$this->handleUpdate($update);
}
finally
{
exit(0);
}
}
}
else
{
$this->handleUpdate($update);
}
}
// Update the offset based on the highest update ID we've seen
if ($maxUpdateId !== null)
{
$this->offset = $maxUpdateId + 1;
}
// If forking is enabled, ensure we clean up any remaining child processes
if ($this->fork)
{
$this->handleUpdatesInFork($updates);
}
else
{
foreach($updates as $update)
// Wait for remaining child processes to finish
while (!empty($this->childPids))
{
$this->handleUpdate($update);
if (function_exists('pcntl_signal_dispatch'))
{
pcntl_signal_dispatch();
}
usleep(10000); // Sleep for 10ms to prevent CPU hogging
}
}
}
/**
* Handles updates in a forked child process
*
* @param array $updates
* @return void
*/
private function handleUpdatesInFork(array $updates): void
{
$pid = pcntl_fork();
if ($pid == -1)
{
// Fork failed
throw new RuntimeException('Failed to fork process for update handling');
}
elseif ($pid)
{
// Parent process
// Wait for child to finish to prevent zombie processes
pcntl_wait($status);
}
else
{
// Child process
foreach($updates as $update)
{
$this->handleUpdate($update);
}
exit(0);
}
}
/**
* Retrieves the allowed updates.
*