75 lines
1.5 KiB
Markdown
75 lines
1.5 KiB
Markdown
---
|
|
title: Configure and Launch DBOS Properly
|
|
impact: CRITICAL
|
|
impactDescription: Application won't function without proper setup
|
|
tags: configuration, launch, setup, initialization
|
|
---
|
|
|
|
## Configure and Launch DBOS Properly
|
|
|
|
Every DBOS application must configure and launch DBOS inside the main function.
|
|
|
|
**Incorrect (configuration at module level):**
|
|
|
|
```python
|
|
from dbos import DBOS, DBOSConfig
|
|
|
|
# Don't configure at module level!
|
|
config: DBOSConfig = {
|
|
"name": "my-app",
|
|
}
|
|
DBOS(config=config)
|
|
|
|
@DBOS.workflow()
|
|
def my_workflow():
|
|
pass
|
|
|
|
if __name__ == "__main__":
|
|
DBOS.launch()
|
|
my_workflow()
|
|
```
|
|
|
|
**Correct (configuration in main):**
|
|
|
|
```python
|
|
import os
|
|
from dbos import DBOS, DBOSConfig
|
|
|
|
@DBOS.workflow()
|
|
def my_workflow():
|
|
pass
|
|
|
|
if __name__ == "__main__":
|
|
config: DBOSConfig = {
|
|
"name": "my-app",
|
|
"system_database_url": os.environ.get("DBOS_SYSTEM_DATABASE_URL"),
|
|
}
|
|
DBOS(config=config)
|
|
DBOS.launch()
|
|
my_workflow()
|
|
```
|
|
|
|
For scheduled-only applications (no HTTP server), block the main thread:
|
|
|
|
```python
|
|
import os
|
|
import threading
|
|
from dbos import DBOS, DBOSConfig
|
|
|
|
@DBOS.scheduled("* * * * *")
|
|
@DBOS.workflow()
|
|
def scheduled_task(scheduled_time, actual_time):
|
|
pass
|
|
|
|
if __name__ == "__main__":
|
|
config: DBOSConfig = {
|
|
"name": "my-app",
|
|
"system_database_url": os.environ.get("DBOS_SYSTEM_DATABASE_URL"),
|
|
}
|
|
DBOS(config=config)
|
|
DBOS.launch()
|
|
threading.Event().wait() # Block forever
|
|
```
|
|
|
|
Reference: [DBOS Configuration](https://docs.dbos.dev/python/reference/configuration)
|