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Example code of scau009/deferred-logger-bundle

Informations about the package deferred-logger-bundle

DeferredLoggerBundle

Install

Require the bundle via composer (when published) or add to your composer.json and composer install.

Register bundle in config/bundles.php:

Configure (optional)

Features

1. Automatic SQL Logging

When enable_sql_logging: true, the bundle automatically captures all Doctrine SQL queries with:

No need to manually call DeferredLogger::contextSql() anymore!

2. Distributed Tracing Support

The bundle provides production-ready distributed tracing with the following features:

Trace Context Propagation

Automatically extracts trace IDs from incoming requests, supporting multiple standards:

  1. W3C Trace Context (traceparent header) - Industry standard
  2. X-Trace-ID - Common in microservices
  3. X-Request-ID - Used by Nginx, load balancers
  4. X-Correlation-ID - Alternative correlation header

If no trace ID is found, a new one is automatically generated.

Response Header Injection

When inject_trace_id_in_response: true (default), the bundle adds trace headers to every response:

This allows:

Microservices Integration

Service A → Service B example:

Service B will automatically pick up the trace ID from the header and use it in its logs!

Long-Running Process Support (Swoole/RoadRunner)

The bundle properly resets trace context on each request:

Log Output Format

All logs include comprehensive trace information:

Integration with Tracing Systems

The trace format is compatible with:

Best Practices

  1. API Gateway: Extract trace ID from incoming requests or generate at the edge
  2. Propagate Downstream: Always pass X-Trace-ID to downstream services
  3. Log Aggregation: Use trace_id to group logs across services (e.g., ELK, Datadog)
  4. Frontend Integration: Return trace ID to clients for support tickets
  5. Monitoring: Create dashboards grouped by trace_id for request flow visualization

3. Symfony Messenger Integration

Automatic trace propagation across async messages!

When enable_messenger_trace: true (default), the bundle automatically:

How It Works

  1. Message Dispatch: When you dispatch a message, the current trace context is automatically attached as a TraceContextStamp
  2. Async Processing: When a worker processes the message, the trace context is restored
  3. Child Spans: Async operations create child spans, maintaining the parent-child relationship

Example

Benefits

Configuration

Advanced: Manual Trace Control

If needed, you can access trace info in handlers:

Trace Flow Visualization

All logs searchable by trace_id: 550e8400 in your log aggregation system!

All versions of deferred-logger-bundle with dependencies

PHP Build Version
Package Version
Requires php Version ^8.0
symfony/framework-bundle Version ^5.4|^6.0|^7.0
monolog/monolog Version ^2.0|^3.0
symfony/uid Version ^5.4|^6.0|^7.0
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