Implementation:LMCache LMCache SGLang Utils

Knowledge Sources	LMCache
Domains	Integration, Configuration
Last Updated	2026-02-09 00:00 GMT

Overview

Utility functions for the SGLang integration layer, providing configuration loading and boolean string parsing.

Description

This module contains helper functions used by LMCache's SGLang integration. The is_false function checks whether a string value represents a falsy boolean (supporting "false", "0", "no", "n", "off"). The lmcache_get_config function reads the LMCache engine configuration either from a YAML file specified by the LMCACHE_CONFIG_FILE environment variable or falls back to reading individual configuration values from environment variables via LMCacheEngineConfig.from_env().

Usage

Use lmcache_get_config at SGLang startup to obtain the LMCache engine configuration. Use is_false when interpreting environment variable strings as boolean flags in the integration layer.

Code Reference

Source Location

• Repository: LMCache
• File: lmcache/integration/sglang/utils.py
• Lines: 1-39

Signature

def is_false(value: str) -> bool: ...

def lmcache_get_config() -> LMCacheEngineConfig: ...

Import

from lmcache.integration.sglang.utils import is_false, lmcache_get_config

I/O Contract

Inputs

Name	Type	Required	Description
value	str	Yes (is_false)	String value to check for falsy meaning
LMCACHE_CONFIG_FILE	env var	No	Environment variable pointing to a YAML configuration file path

Outputs

Name	Type	Description
bool	bool	True if the string is a falsy value (is_false)
config	LMCacheEngineConfig	Loaded engine configuration object (lmcache_get_config)

Usage Examples

from lmcache.integration.sglang.utils import is_false, lmcache_get_config

# Check a boolean environment variable
if not is_false(os.getenv("LMCACHE_ENABLED", "true")):
    config = lmcache_get_config()
    # ... initialize LMCache with SGLang ...