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在 PHP 中,RPC(遠程過程調用)框架通常用于在不同服務之間進行通信。為了實現調用鏈跟蹤,我們可以使用分布式追蹤系統,如 Zipkin、Jaeger 或 OpenTracing。這里以 Jaeger 為例,展示如何在 PHP RPC 框架中實現調用鏈跟蹤。
composer require jonahgeorge/jaeger-client-php
use Jaeger\Config;
$config = Config::getInstance();
$config->gen128bit();
$tracer = $config->initTracer('your_service_name', 'localhost:6831');
客戶端中間件示例:
use Jaeger\Span\Span;
use Jaeger\Tag\StringTag;
class ClientTraceMiddleware
{
private $tracer;
public function __construct($tracer)
{
$this->tracer = $tracer;
}
public function handle($request, $next)
{
$spanContext = $this->tracer->extract(Formats\TEXT_MAP, $request->headers);
$span = $this->tracer->startSpan('rpc_client', ['child_of' => $spanContext]);
// Inject the Span context into the headers
$this->tracer->inject($span->getContext(), Formats\TEXT_MAP, $request->headers);
// Send the request and get the response
$response = $next($request);
// Set the response status code as a tag on the Span
$span->addTag(new StringTag('http.status_code', $response->statusCode));
// Finish the Span
$span->finish();
return $response;
}
}
服務端中間件示例:
use Jaeger\Span\Span;
use Jaeger\Tag\StringTag;
class ServerTraceMiddleware
{
private $tracer;
public function __construct($tracer)
{
$this->tracer = $tracer;
}
public function handle($request, $next)
{
$spanContext = $this->tracer->extract(Formats\TEXT_MAP, $request->headers);
$span = $this->tracer->startSpan('rpc_server', ['child_of' => $spanContext]);
// Add tags to the Span
$span->addTag(new StringTag('http.method', $request->method));
$span->addTag(new StringTag('http.url', $request->url));
// Process the request and get the response
$response = $next($request);
// Set the response status code as a tag on the Span
$span->addTag(new StringTag('http.status_code', $response->statusCode));
// Finish the Span
$span->finish();
return $response;
}
}
將中間件添加到 RPC 客戶端和服務端的處理流程中。
運行你的應用程序,并在 Jaeger UI 中查看調用鏈跟蹤數據。
這樣,你就可以在 PHP RPC 框架中實現調用鏈跟蹤了。請注意,這個示例僅作為參考,你可能需要根據你的具體需求和 RPC 框架進行調整。
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