mirror of https://github.com/denoland/deno.git
120 lines
2.9 KiB
TypeScript
120 lines
2.9 KiB
TypeScript
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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import { Logger } from "./logger.ts";
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import {
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BaseHandler,
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ConsoleHandler,
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WriterHandler,
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FileHandler
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} from "./handlers.ts";
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export class LoggerConfig {
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level?: string;
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handlers?: string[];
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}
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export interface LogConfig {
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handlers?: {
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[name: string]: BaseHandler;
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};
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loggers?: {
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[name: string]: LoggerConfig;
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};
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}
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const DEFAULT_LEVEL = "INFO";
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const DEFAULT_CONFIG: LogConfig = {
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handlers: {
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default: new ConsoleHandler(DEFAULT_LEVEL)
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},
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loggers: {
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default: {
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level: DEFAULT_LEVEL,
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handlers: ["default"]
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}
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}
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};
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const state = {
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handlers: new Map<string, BaseHandler>(),
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loggers: new Map<string, Logger>(),
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config: DEFAULT_CONFIG
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};
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export const handlers = {
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BaseHandler,
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ConsoleHandler,
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WriterHandler,
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FileHandler
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};
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export function getLogger(name?: string): Logger {
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if (!name) {
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return state.loggers.get("default")!;
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}
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if (!state.loggers.has(name)) {
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const logger = new Logger("NOTSET", []);
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state.loggers.set(name, logger);
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return logger;
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}
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return state.loggers.get(name)!;
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}
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export const debug = (msg: string, ...args: unknown[]): void =>
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getLogger("default").debug(msg, ...args);
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export const info = (msg: string, ...args: unknown[]): void =>
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getLogger("default").info(msg, ...args);
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export const warning = (msg: string, ...args: unknown[]): void =>
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getLogger("default").warning(msg, ...args);
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export const error = (msg: string, ...args: unknown[]): void =>
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getLogger("default").error(msg, ...args);
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export const critical = (msg: string, ...args: unknown[]): void =>
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getLogger("default").critical(msg, ...args);
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export async function setup(config: LogConfig): Promise<void> {
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state.config = {
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handlers: { ...DEFAULT_CONFIG.handlers, ...config.handlers },
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loggers: { ...DEFAULT_CONFIG.loggers, ...config.loggers }
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};
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// tear down existing handlers
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state.handlers.forEach((handler): void => {
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handler.destroy();
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});
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state.handlers.clear();
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// setup handlers
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const handlers = state.config.handlers || {};
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for (const handlerName in handlers) {
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const handler = handlers[handlerName];
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await handler.setup();
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state.handlers.set(handlerName, handler);
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}
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// remove existing loggers
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state.loggers.clear();
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// setup loggers
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const loggers = state.config.loggers || {};
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for (const loggerName in loggers) {
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const loggerConfig = loggers[loggerName];
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const handlerNames = loggerConfig.handlers || [];
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const handlers: BaseHandler[] = [];
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handlerNames.forEach((handlerName): void => {
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if (state.handlers.has(handlerName)) {
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handlers.push(state.handlers.get(handlerName)!);
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}
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});
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const levelName = loggerConfig.level || DEFAULT_LEVEL;
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const logger = new Logger(levelName, handlers);
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state.loggers.set(loggerName, logger);
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}
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}
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setup(DEFAULT_CONFIG);
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