simple-logger.ts•2.18 kB
import { formatLogMessage } from "./log-format.util";
import { shouldLog } from "./log-level.util";
/**
* Simple Logger Implementation
*
* Basic console logger implementation
*/
import type { LogMetadata, Logger } from "./log.types";
/**
* Simple logger implementation that logs to the console
*/
export class SimpleLogger implements Logger {
/**
* Logger name used in log messages
*/
private name: string;
/**
* Create a new simple logger
*
* @param name - The logger name
*/
constructor(name = "MCP") {
this.name = name;
}
/**
* Log a debug message
*
* @param message - The message to log
* @param metadata - Optional metadata to include
*/
debug(message: unknown, metadata?: LogMetadata): void {
if (!shouldLog("debug")) return;
const formatted = formatLogMessage(message, metadata);
// Use stderr for all MCP logs to avoid interfering with JSON-RPC
console.error(`[DEBUG][${this.name}] ${formatted}`);
}
/**
* Log an info message
*
* @param message - The message to log
* @param metadata - Optional metadata to include
*/
info(message: unknown, metadata?: LogMetadata): void {
if (!shouldLog("info")) return;
const formatted = formatLogMessage(message, metadata);
// Use stderr for all MCP logs to avoid interfering with JSON-RPC
console.error(`[INFO][${this.name}] ${formatted}`);
}
/**
* Log a warning message
*
* @param message - The message to log
* @param metadata - Optional metadata to include
*/
warn(message: unknown, metadata?: LogMetadata): void {
if (!shouldLog("warn")) return;
const formatted = formatLogMessage(message, metadata);
// Use stderr for all MCP logs to avoid interfering with JSON-RPC
console.error(`[WARN][${this.name}] ${formatted}`);
}
/**
* Log an error message
*
* @param message - The message to log
* @param metadata - Optional metadata to include
*/
error(message: unknown, metadata?: LogMetadata): void {
if (!shouldLog("error")) return;
const formatted = formatLogMessage(message, metadata);
console.error(`[ERROR][${this.name}] ${formatted}`);
}
}