README

An instrumentation library for AWS X-Ray for PHP 8.x LICENSE CHANGELOG

Installation

To use this package, use Composer:

• From CLI: composer require fido-id/php-xray
• Or, directly in your composer.json:

{
  "require": {
    "fido/php-xray": "^0.2.1",
  }
}

Usage

Start a new trace, create a new segment, add any desired subsegment, close it and submit it.

eg.

$client = new \GuzzleHttp\Client();

$trace = new Trace(name: 'a_new_trace');

$httpSegment = new HttpSegment(
    name: \uniqid("http_segment_post_500_"),
    url: 'ifconfig.me/ua',
    method: 'GET'
);

$httpSegment
    ->closeWithPsrResponse($client->get('ifconfig.me/ua'))

$trace->addSubsegment($httpSegment);

$trace->end()->submit(new DaemonSegmentSubmitter());

Closing segments is mandatory before submitting, closing a parent segment will automatically close any child segment.

Available built-in segments

• Segment: Default simple segment extended by any other segment in this list.
• RemoteSegment: A segment with the $traced boolean property, extended by the other segment.
• DynamoSegment: A segment thought for Dynamo operations with $tableName, $operation and $requestId dynamo related properties.
• HttpSegment: A segment thought for operation over HTTP with $url, $method and $responseCoderelated properties. It also features a closeWithPsrResponse helper method which allows to populate and close the segment with an object implementing the Psr\Http\Message\ResponseInterface interface.
• SqlSegment: A segment thought for SQL operations with $query property and $url,$preparation,$databaseType,$databaseVersion,$driverVersion and $user optional properties.

You may want to extend one of the above class to instrument custom segments for metadata, annotation and aws data custom handling (Remember to extend __construct and jsonSerialize methods accordingly).

Fault and error handling

Any segment has the $fault and $error boolean properties that can be used accordingly, also you can set the cause with a Cause object.

eg.

$trace = new Trace(name: 'a_new_trace');
    
$pdo = new \PDO('a_totally_valid_dsn');
$query = "SELECT * FROM table_name";

$sqlSegment = new SqlSegment(
    name: \uniqid("subsegment_sql_"),
    query: $query
);

try {
    $pdo->exec($query);
} catch (\Throwable $exception) {
    $sqlSegment->setError(true);
    $sqlSegment->setCause(Cause::fromThrowable($exception));
}

$trace->addSubsegment($sqlSegment);

$trace->end()->submit(new DaemonSegmentSubmitter());

How to test the software

You can run the library test suite with PHPUnit by running composer test script, you can also run composer mutation script for mutation testing report.

Known issues

• Segments currently support only Cause object but not exception ID.
• Submitting open segment is not supported yet.

Getting help

If you have questions, concerns, bug reports, etc, please file an issue in this repository's Issue Tracker.

Getting involved

Feedbacks and pull requests are very welcome, more on how to contribute on CONTRIBUTING.

Credits and references

This library is inspired by patrickkerrigan/php-xray, initially we thought to fork it but ended up re-writing it from scratch using PHP8 named constructors instead of fluent approach which allow us to have always valid entities instantiated.