PHP code example of vantt / opentracing-jaeger-php

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

vantt / opentracing-jaeger-php example snippets

$config = Config::getInstance();
$tracer = $config->initTracer('example', '0.0.0.0:6831');

$config->gen128bit();

$rootContext = $tracer->extract(Formats\TEXT_MAP, getallheaders());

use OpenTracing\Formats;

$arrHeader = [];
$tracer->inject($span->getContext(), Formats\TEXT_MAP, $arrHeader);
$httpClient->request($url, $arrHeader);

$rootContext = $tracer->extract(Formats\TEXT_MAP, getallheaders());
$span = $tracer->buildSpan('my_span')
               ->asChildOf($rootContext)
               ->withTag('foo', 'bar')               
               ->withStartTimestamp(time())
               ->start();

$scope = $tracer->buildSpan('my_span')
                ->asChildOf($rootContext)
                ->withTag('foo', 'bar')               
                ->withStartTimestamp(time())
                ->startActive();

use OpenTracing\Formats;
use OpenTracing\GlobalTracer;

...

// extract the span context
$spanContext = GlobalTracer::get()->extract(
    Formats\TEXT_MAP,
    getallheaders()
);

function doSomething() {
    ...

    // start a new span called 'my_span' and make it a child of the $spanContext
    $span = GlobalTracer::get()->buildSpan('my_operation_span_name')
                               ->start();
    ...
    
    // add some logs to the span
    $span->log([
        'event' => 'soft error',
        'type' => 'cache timeout',
        'waiter.millis' => 1500,
    ]);

    // finish the the span
    $span->finish();
}

$span = $tracer->buildSpan('my_first_span')->start();
...
$span->finish();

// At dispatcher level
$scope = $tracer->buildSpan('request')->start();
...
$scope->close();

// At controller level
$scope = $tracer->buildSpan('controller')->startActive();
...
$scope->close();

// At RPC calls level
$scope = $tracer->buildSpan('http')->startActive();
file_get_contents('http://php.net');
$scope->close();

$tracer = GlobalTracer::get();
$parent = $tracer->startSpan('parent');

$child = $tracer->buildSpan('child_operation')
                ->asChildOf($parent)
                ->start();
...

$child->finish();

...

$parent->finish();

$parent = GlobalTracer::get()->buildSpan('parent')->startActive();

...

/*
 * Since the parent span has been created by using startActiveSpan we don't need
 * to pass a reference for this child span
 */
$child = GlobalTracer::get()->buildSpan('my_second_span')->startActive();

...

$child->close();

...

$parent->close();

use GuzzleHttp\Client;
use OpenTracing\Formats;

...

$tracer = GlobalTracer::get();

$spanContext = $tracer->extract(
    Formats\HTTP_HEADERS,
    getallheaders()
);

try {
    $span = $tracer->buildSpan('my_span')->asChildOf($spanContext)->start();

    $client = new Client;

    $headers = [];

    $tracer->inject(
        $span->getContext(),
        Formats\HTTP_HEADERS,
        $headers
    );

    $request = new \GuzzleHttp\Psr7\Request('GET', 'http://myservice', $headers);
    $client->send($request);
    ...

} catch (\Exception $e) {
    ...
}
...

use OpenTracing\GlobalTracer;
use OpenTracing\Formats;

$tracer = GlobalTracer::get();
$spanContext = $tracer->extract(Formats\TEXT_MAP, getallheaders());
$tracer->buildSpan('my_span')->asChildOf($spanContext)->startActive();

$serverSpan = $tracer->startSpan('example HTTP', ['child_of' => $spanContext]);

$serverSpan->addBaggageItem("version", "2.0.0");

$clientTrace->inject($clientSpan1->spanContext, Formats\TEXT_MAP, $_SERVER);

// tags are searchable in Jaeger UI
$span->setTag('http.status', '200');

// log record
$span->log(['error' => 'HTTP request timeout']);

$config->setDisabled(true);

$config::$propagator = \Jaeger\Constants\PROPAGATOR_ZIPKIN;

$span->finish();
$config->flush();