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# Comment Service
## Event Documentation
* Events Produced:
* **Topic:** "``comment``" | **Schema:** "``CommentEvent``" protobuf
* Type: ``"created"`` | Data: ``Comment``
* Type: ``"updated"`` | Data: ``Comment``
* Type: ``"deleted"`` | Data: ``Comment``
* Events Consumed:
* **Topic:** "``post``" | **Schema:** "``PostEvent``" protobuf
* Type: ``"deleted"`` | Data: ``Post`` (only with ``Post.id`` attribute)
* **Topic:** "``user``" | **Schema:** "``UserEvent``" protobuf
* Type: ``"deleted"`` | Data: ``User``
## Configuration
### Environment Variables
**PostgreSQL:**
``POSTGRES_USER`` (Required)
* e.g. "postgres"
``POSTGRES_PASS`` (Required)
* e.g. "postgres"
``POSTGRES_HOST`` (Required)
* e.g. "localhost:5432"
``POSTGRES_DATABASE`` (Required)
* e.g. "postgres"
---
**Redis:**
``REDIS_HOST`` (Required)
* e.g. "localhost:6379"
``REDIS_PASS`` (Required)
* e.g. "redis"
---
**Kafka:**
``KAFKA_BROKERS`` (Required)
* e.g. "localhost:9092" or "localhost:9092,localhost:9093"