Adopt OpenTelemetry Logging

[Emily-Jiang]

Description

As a:

• Application user
• Specification implementer

...I need to be able to:

use OpenTelemetry Logging in MicroProfile

...which enables me to:

have a consistent obs to have logging, metrics and tracing working together.

[Emily-Jiang]

The OpenTelemetry Logs bridge API exists to enable briding logs from other log frameworks (e.g. SLF4J, Log4j, JUL, Logback,e tc) into OpenTelemetry. It does not define new Log APIs. The following shows the entry points.

LoggerProvider (provider.loggerBuilder(instrumentationScopeName)
    -> LoggerBuilder  (loggerBuilder.build())
      ->Logger (logger.logRecordBuilder)
        ->LogRecordBuilder

Supported API Classes

Main API access

• package io.opentelemetry.api.logs (opentelemetry-api, stable) with the following classes

• LoggerProvider, LoggerBuilder, Logger, LogRecordBuilder, Serverity - support all of these
• DefaultLogger, DefaultLoggerProvider (noop classes) - not needed

Supported the injection

• support the injection of LoggerProvider
  -@Inject LoggerProvider provider

[Emily-Jiang]

This has been done. We have decided not to expose the Logging SPI. See minutes here on 20th May for the details.