Recipe for adding an SLF4J TRACE-level logger to a Feign-OkHttp3 client

TraceLogger.java

    private static class TraceLogger implements okhttp3.logging.HttpLoggingInterceptor.Logger {

        /*
                                .client(new OkHttpClient(new okhttp3.OkHttpClient.Builder()
                                .addInterceptor(new okhttp3.logging.HttpLoggingInterceptor(
                                        new TraceLogger(LoggerFactory.getLogger(FEIGN_TARGET)))
                                        .setLevel(HttpLoggingInterceptor.Level.BODY))
                                .build()))

         */
        private final org.slf4j.Logger slf4jLogger;

        private TraceLogger(org.slf4j.Logger slf4jLogger) {
            this.slf4jLogger = slf4jLogger;
        }

        @Override
        public void log(String message) {
            slf4jLogger.trace(message);
        }
    }