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https://github.com/umbrellio/jaravel

Integration Laravel application and Jaeger.
https://github.com/umbrellio/jaravel

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Integration Laravel application and Jaeger.

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# Jaravel

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###### Library that allows easy integrate your Laravel application with Jaeger (OpenTracing).
## Installation

Installation can be done with composer
```
composer require umbrellio/jaravel
```
## Usage
Jaravel is able to trace your incoming http requests, console command,
your guzzle requests to other services and event your queued jobs.

You can check your configuration in jaravel.php. All configuration is described
in comment blocks.

You can configure span name or tags for every type of span:
```php
// config/jaravel.php
...
'http' => [
'span_name' => fn (Request $request) => 'App: ' . $request->path(),
'tags' => fn (Request $request, Response $response) => [
'type' => 'http',
'request_host' => $request->getHost(),
'request_path' => $path = $request->path(),
'request_method' => $request->method(),
'response_status' => $response->getStatusCode(),
'error' => !$response->isSuccessful() && !$response->isRedirection(),
],
...
'guzzle' => [
'span_name' => Umbrellio\Jaravel\Configurations\Guzzle\SpanNameResolver::class,
'tags' => Umbrellio\Jaravel\Configurations\Guzzle\TagsResolver::class,
],
...
```
You can use any callable or fully qualified class name, that points to class
having `__invoke` method (it will be initialized via Service Container,
so you can inject anything that you want in constructor). It`s preferred way, if you
are using `config:cache` Artisan command, because closures can't be serialized.
Params passed to callable depends on what type of span (http, console, etc).

### Tracing incoming http requests

To enable tracing incoming http requests, you need to add middleware `HttpTracingMiddleware`
to specific routes or globally, for example.

Requests can be filtered via 'allow_request' or 'deny_request' callables.
If 'allow_request' is defined, http request will be traced only if this
callable will return true. After 'allow_request' Jaravel checks 'deny_request'
callable, and doesn`t make a trace, if it returns false. If you dont want
to filter any requests, you can skip this settings.

For example, if you want to trace only requests having '/api' in the path:
```php
// config/jaravel.php
...
'http' => [
'allow_request' => fn (Request $request) => str_contains($request->path(), '/api'),
...
```

If `'trace_id_header'` is configured, header with trace id will be added to response.
field.

### Tracing console commands

Enabled by default.

It`s able to filter commands via 'filter_commands', that will not be traced:
```php
// config/jaravel.php
...
'console' => [
'filter_commands' => ['schedule:run'],
...
```

### Tracing jobs

To start tracing your jobs and even relate it with parent span, you need just
add `JobTracingMiddleware` to jobs:
```php
[
'tags' => fn ($realJob, ?Job $job) => [
'type' => 'job',
'job_class' => get_class($realJob),
'job_id' => optional($job)
->getJobId(),
'job_connection_name' => optional($job)
->getConnectionName(),
'job_name' => optional($job)
->getName(),
'job_queue' => optional($job)
->getQueue(),
'job_attempts' => optional($job)
->attempts(),
],
],
...
```

### Tracing outgoing http requests with Guzzle

To start tracing your Guzzle requests, you need just add middleware to your Guzzle
client:
```php
use GuzzleHttp\Client;
use GuzzleHttp\HandlerStack;
use Umbrellio\Jaravel\HttpTracingMiddlewareFactory;

$stack = HandlerStack::create();
$stack->push(HttpTracingMiddlewareFactory::create());
$client = new Client(['handler' => $stack]);
```

> To add tracing to all your requests you can bind above client to `GuzzleHttp\Client` in
> your Service Provider.

### Making your own spans

If you need to make your own span, you can follow next example:

```php
use App\Services\MyService;
use OpenTracing\Tracer;
use Umbrellio\Jaravel\Services\Span\SpanCreator;
use Umbrellio\Jaravel\Services\Span\SpanTagHelper;

// You should use dependency injection in your code, it`s just an example
$spanCreator = app(SpanCreator::class);
$myService = app(MyService::class);
$tracer = app(Tracer::class);

// First you need to create a span. It will be a child of current active span, if active span exists
$span = $spanCreator->create('Call MyService');

// Do something
$myService->doSomething();

// Close active scope (span will be finished automatically) and flush tracer.
optional($tracer->getScopeManager()->getActive())->close();
$tracer->flush();
```

If you need to retrieve current trace id, you can use:
`Umbrellio\Jaravel\Services\Span\ActiveSpanTraceIdRetriever::retrieve()`

## License

Released under MIT License.

## Authors

Created by Vitaliy Lazeev.

## Contributing

- Fork it ( https://github.com/umbrellio/jaravel )
- Create your feature branch (`git checkout -b feature/my-new-feature`)
- Commit your changes (`git commit -am 'Add some feature'`)
- Push to the branch (`git push origin feature/my-new-feature`)
- Create new Pull Request


Supported by Umbrellio