Configuration Variables
This example demonstrates how to use configuration variables for dynamic configuration management.
Purpose
Validate the ability to:
- Define and use configuration variables in TOML files
- Override variables via environment variables
- Apply variables across sources, sinks, and model configurations
Features Validated
| Feature | Description |
|---|---|
| Variable Substitution | Using ${VAR} syntax in configuration files |
| Environment Overrides | Overriding config values via environment variables |
| Default Values | Setting fallback values for undefined variables |
| Cross-Config References | Using variables across multiple configuration files |
Quick Start
cd core/confvars_case
# Run with default variables
./run.sh
# Run with custom environment variables
LINE_CNT=5000 STAT_SEC=5 ./run.sh
Directory Structure
confvars_case/
├── conf/wparse.toml # Main config with variable references
├── models/
│ ├── wpl/ # Parsing rules
│ ├── oml/ # Transformation models
│ └── sinks/ # Sink routing
└── data/ # Runtime data
Example Usage
# In wparse.toml
[performance]
rate_limit_rps = ${RATE_LIMIT:-500000} # Default: 500000
[log_conf]
level = "${LOG_LEVEL:-info}" # Default: info
配置使用变量 (中文)
本用例演示如何在配置中使用变量进行动态配置管理。