Core: Configurable Logger

[fahrradflucht]

Currently we access console directly. Let users provide a logger instead.

The FeatureAppManager and FeatureServiceRegistry need to accept an optional logger through their constructor options. This option must also be added to the createFeatureHub options.

To let Feature Services and Apps log through common infrastructure, we will provide a new Feature Service named LoggerService. This new Feature Service automatically prefixes consumer logs with consumer UIDs. The underlaying logger is provided via a Feature Service factory.

Both loggers need to implement the same interface defined in Core. We also provide a ConsoleLogger implementing this interface for easy adaption.

Tasks

• evaluate common loggers and pick a Logger interface
  • pino and bunyan define the levels/methods trace, debug, info, warn, error, and fatal
  • log4js defines the levels ALL, MARK, TRACE, DEBUG, INFO, WARN, ERROR, FATAL, and OFF
  • console has the methods debug, error, info, log, trace, and warn (among others like time etc.)
  • npm defines the levels silent, error, warn, notice, http, timing, info, verbose, and silly
  • RFC 5424 defines the levels emerg, alert, crit, error, warning, notice, info, and debug
• create ConsoleLogger in @feature-hub/core feat(core): define Logger interface and add consoleLogger #402
• integrate logger option into FeatureAppManager feat(core): add logger option to FeatureAppManager, FeatureServiceRegistry, and createFeatureHub #404
• integrate logger option into FeatureServiceRegistry feat(core): add logger option to FeatureAppManager, FeatureServiceRegistry, and createFeatureHub #404
• integrate logger option into createFeatureHub feat(core): add logger option to FeatureAppManager, FeatureServiceRegistry, and createFeatureHub #404
• integrate logger option into @feature-hub/dom define functions feat(dom): add logger option to defineFeatureAppContainer & defineFeatureAppLoader #406
• add logger to FeatureHubContextValue and integrate into @feature-hub/react FeatureAppLoader/FeatureAppContainer feat(react): add custom logger option to FeatureHubContext #408
• create LoggerService feat(logger): add Logger Feature Service #413
• use LoggerService in HistoryService feat(history-service): use Logger Feature Service instead of console #414
• use LoggerService in AsyncSsrManager feat(async-ssr-manager): use Logger Feature Service instead of console #415
• use LoggerService in TodoManager feat(demos): use Logger Feature Service in Todo Manager #417
• add "Custom Logging" demo feat(demos): add custom logging demo #418
• add documentation, e.g. a "Custom Logging" guide docs(website): add custom logging guide #423