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<?php
namespace Sentry\Laravel\Tracing;
use Exception;
use Illuminate\Contracts\Container\BindingResolutionException;
use Illuminate\Contracts\Container\Container;
use Illuminate\Contracts\Events\Dispatcher;
use Illuminate\Database\Events as DatabaseEvents;
use Illuminate\Queue\Events as QueueEvents;
use Illuminate\Queue\Queue;
use Illuminate\Queue\QueueManager;
use RuntimeException;
use Sentry\Laravel\Integration;
use Sentry\SentrySdk;
use Sentry\Tracing\SpanContext;
use Sentry\Tracing\SpanStatus;
use Sentry\Tracing\TransactionContext;
class EventHandler
{
public const QUEUE_PAYLOAD_TRACE_PARENT_DATA = 'sentry_trace_parent_data';
/**
* Map event handlers to events.
*
* @var array
*/
protected static $eventHandlerMap = [
'illuminate.query' => 'query', // Until Laravel 5.1
DatabaseEvents\QueryExecuted::class => 'queryExecuted', // Since Laravel 5.2
];
/**
* Map queue event handlers to events.
*
* @var array
*/
protected static $queueEventHandlerMap = [
QueueEvents\JobProcessing::class => 'queueJobProcessing', // Since Laravel 5.2
QueueEvents\JobProcessed::class => 'queueJobProcessed', // Since Laravel 5.2
QueueEvents\JobExceptionOccurred::class => 'queueJobExceptionOccurred', // Since Laravel 5.2
];
/**
* The Laravel container.
*
* @var \Illuminate\Contracts\Container\Container
*/
private $container;
/**
* Indicates if we should we add SQL queries as spans.
*
* @var bool
*/
private $traceSqlQueries;
/**
* Indicates if we should we add SQL query origin data to query spans.
*
* @var bool
*/
private $traceSqlQueryOrigins;
/**
* Indicates if we should trace queue job spans.
*
* @var bool
*/
private $traceQueueJobs;
/**
* Indicates if we should trace queue jobs as separate transactions.
*
* @var bool
*/
private $traceQueueJobsAsTransactions;
/**
* Holds a reference to the parent queue job span.
*
* @var \Sentry\Tracing\Span|null
*/
private $parentQueueJobSpan;
/**
* Holds a reference to the current queue job span or transaction.
*
* @var \Sentry\Tracing\Transaction|\Sentry\Tracing\Span|null
*/
private $currentQueueJobSpan;
/**
* The backtrace helper.
*
* @var \Sentry\Laravel\Tracing\BacktraceHelper
*/
private $backtraceHelper;
/**
* EventHandler constructor.
*
* @param \Illuminate\Contracts\Container\Container $container
* @param \Sentry\Laravel\Tracing\BacktraceHelper $backtraceHelper
* @param array $config
*/
public function __construct(Container $container, BacktraceHelper $backtraceHelper, array $config)
{
$this->container = $container;
$this->backtraceHelper = $backtraceHelper;
$this->traceSqlQueries = ($config['sql_queries'] ?? true) === true;
$this->traceSqlQueryOrigins = ($config['sql_origin'] ?? true) === true;
$this->traceQueueJobs = ($config['queue_jobs'] ?? false) === true;
$this->traceQueueJobsAsTransactions = ($config['queue_job_transactions'] ?? false) === true;
}
/**
* Attach all event handlers.
*/
public function subscribe(): void
{
try {
/** @var \Illuminate\Contracts\Events\Dispatcher $dispatcher */
$dispatcher = $this->container->make(Dispatcher::class);
foreach (static::$eventHandlerMap as $eventName => $handler) {
$dispatcher->listen($eventName, [$this, $handler]);
}
} catch (BindingResolutionException $e) {
// If we cannot resolve the event dispatcher we also cannot listen to events
}
}
/**
* Attach all queue event handlers.
*
* @param \Illuminate\Queue\QueueManager $queue
*/
public function subscribeQueueEvents(QueueManager $queue): void
{
// If both types of queue job tracing is disabled also do not register the events
if (!$this->traceQueueJobs && !$this->traceQueueJobsAsTransactions) {
return;
}
// The payload create callback was introduced in Laravel 5.7 so we need to guard against older versions
if (method_exists(Queue::class, 'createPayloadUsing')) {
Queue::createPayloadUsing(static function (?string $connection, ?string $queue, ?array $payload): ?array {
$currentSpan = Integration::currentTracingSpan();
if ($currentSpan !== null && $payload !== null) {
$payload[self::QUEUE_PAYLOAD_TRACE_PARENT_DATA] = $currentSpan->toTraceparent();
}
return $payload;
});
}
$queue->looping(function () {
$this->afterQueuedJob();
});
try {
/** @var \Illuminate\Contracts\Events\Dispatcher $dispatcher */
$dispatcher = $this->container->make(Dispatcher::class);
foreach (static::$queueEventHandlerMap as $eventName => $handler) {
$dispatcher->listen($eventName, [$this, $handler]);
}
} catch (BindingResolutionException $e) {
// If we cannot resolve the event dispatcher we also cannot listen to events
}
}
/**
* Pass through the event and capture any errors.
*
* @param string $method
* @param array $arguments
*/
public function __call($method, $arguments)
{
$handlerMethod = "{$method}Handler";
if (!method_exists($this, $handlerMethod)) {
throw new RuntimeException("Missing tracing event handler: {$handlerMethod}");
}
try {
call_user_func_array([$this, $handlerMethod], $arguments);
} catch (Exception $exception) {
// Ignore
}
}
/**
* Until Laravel 5.1
*
* @param string $query
* @param array $bindings
* @param int $time
* @param string $connectionName
*/
protected function queryHandler($query, $bindings, $time, $connectionName): void
{
$this->recordQuerySpan($query, $time);
}
/**
* Since Laravel 5.2
*
* @param \Illuminate\Database\Events\QueryExecuted $query
*/
protected function queryExecutedHandler(DatabaseEvents\QueryExecuted $query): void
{
$this->recordQuerySpan($query->sql, $query->time);
}
/**
* Helper to add an query breadcrumb.
*
* @param string $query
* @param float|null $time
*/
private function recordQuerySpan($query, $time): void
{
if (!$this->traceSqlQueries) {
return;
}
$parentSpan = Integration::currentTracingSpan();
// If there is no tracing span active there is no need to handle the event
if ($parentSpan === null) {
return;
}
$context = new SpanContext();
$context->setOp('sql.query');
$context->setDescription($query);
$context->setStartTimestamp(microtime(true) - $time / 1000);
$context->setEndTimestamp($context->getStartTimestamp() + $time / 1000);
if ($this->traceSqlQueryOrigins) {
$queryOrigin = $this->resolveQueryOriginFromBacktrace($context);
if ($queryOrigin !== null) {
$context->setData(['sql.origin' => $queryOrigin]);
}
}
$parentSpan->startChild($context);
}
/**
* Try to find the origin of the SQL query that was just executed.
*
* @return string|null
*/
private function resolveQueryOriginFromBacktrace(): ?string
{
$firstAppFrame = $this->backtraceHelper->findFirstInAppFrameForBacktrace(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS));
if ($firstAppFrame === null) {
return null;
}
$filePath = $this->backtraceHelper->getOriginalViewPathForFrameOfCompiledViewPath($firstAppFrame) ?? $firstAppFrame->getFile();
return "{$filePath}:{$firstAppFrame->getLine()}";
}
/*
* Since Laravel 5.2
*
* @param \Illuminate\Queue\Events\JobProcessing $event
*/
protected function queueJobProcessingHandler(QueueEvents\JobProcessing $event)
{
$parentSpan = Integration::currentTracingSpan();
// If there is no tracing span active and we don't trace jobs as transactions there is no need to handle the event
if ($parentSpan === null && !$this->traceQueueJobsAsTransactions) {
return;
}
// If there is a parent span we can record that job as a child unless configured to not do so
if ($parentSpan !== null && !$this->traceQueueJobs) {
return;
}
if ($parentSpan === null) {
$traceParent = $event->job->payload()[self::QUEUE_PAYLOAD_TRACE_PARENT_DATA] ?? null;
$context = $traceParent === null
? new TransactionContext
: TransactionContext::fromSentryTrace($traceParent);
// If the parent transaction was not sampled we also stop the queue job from being recorded
if ($context->getParentSampled() === false) {
return;
}
} else {
$context = new SpanContext;
}
$job = [
'job' => $event->job->getName(),
'queue' => $event->job->getQueue(),
'attempts' => $event->job->attempts(),
'connection' => $event->connectionName,
];
// Resolve name exists only from Laravel 5.3+
$resolvedJobName = method_exists($event->job, 'resolveName')
? $event->job->resolveName()
: null;
if ($resolvedJobName !== null) {
$job['resolved'] = $resolvedJobName;
}
if ($context instanceof TransactionContext) {
$context->setName($resolvedJobName ?? $event->job->getName());
}
$context->setOp('queue.job');
$context->setData($job);
$context->setStartTimestamp(microtime(true));
// When the parent span is null we start a new transaction otherwise we start a child of the current span
if ($parentSpan === null) {
$this->currentQueueJobSpan = SentrySdk::getCurrentHub()->startTransaction($context);
} else {
$this->currentQueueJobSpan = $parentSpan->startChild($context);
}
$this->parentQueueJobSpan = $parentSpan;
SentrySdk::getCurrentHub()->setSpan($this->currentQueueJobSpan);
}
/**
* Since Laravel 5.2
*
* @param \Illuminate\Queue\Events\JobExceptionOccurred $event
*/
protected function queueJobExceptionOccurredHandler(QueueEvents\JobExceptionOccurred $event)
{
$this->afterQueuedJob(SpanStatus::internalError());
}
/**
* Since Laravel 5.2
*
* @param \Illuminate\Queue\Events\JobProcessed $event
*/
protected function queueJobProcessedHandler(QueueEvents\JobProcessed $event)
{
$this->afterQueuedJob(SpanStatus::ok());
}
private function afterQueuedJob(?SpanStatus $status = null): void
{
if ($this->currentQueueJobSpan === null) {
return;
}
$this->currentQueueJobSpan->setStatus($status);
$this->currentQueueJobSpan->finish();
$this->currentQueueJobSpan = null;
SentrySdk::getCurrentHub()->setSpan($this->parentQueueJobSpan);
$this->parentQueueJobSpan = null;
}
}