Can't get Platform Logging to work

[Daniel Fuchs]

Hi Nicolai,

Log messages emitted by the JVM are not emitted through
the System.Logger API. JEP 264 is a pure Java API which
aims at replacing the sun.util.logging.PlatformLogger
implementation.

I believe what you are looking for is JEP 158
Unified JVM Logging [1]

best regards,

-- daniel

[1] http://openjdk.java.net/jeps/158


On 19/08/16 16:05, Nicolai Parlog wrote:
>  Hi!
>
> I'm trying out JEP 264: Platform Logging API and Service but can't get
> it to work (or misunderstood something).
>
> My understanding is that the JVM should use the provided LoggerFinder to
> log its own messages. So when I start with "-verbose:gc" I expected the
> message "Using G1" to go through my logger implementation - but it doesn't.
>
> I've set up a demo project[1], in which I'm creating a modules `logger`,
> which provides `LoggerFinder`, and `app`, which holds the started
> application. I launch with:
>
> 	java -verbose:gc -mp out/mods -m org.codefx.demo.java9.app
>
> The messages I send from the app module go through my logger, so the
> service module gets picked up. But the G1 message doesn't. :( I noticed
> that the docs[2] say this:
>
>> First it finds any custom LoggerFinder provider using the
> ServiceLoader facility with the system class loader.
>
> Do I have to do anything differently to make my service available to the
> system class loader?
>
> On a tangent, I also wondered what would be the preferred way to log
> from inside my code. Should I use System::getLogger directly?
>
> 	Logger logger = System.getLogger("Application");
> 	logger.log(Level.INFO, "Hello, World!");
>
>  so long ... Nicolai
>
>
> [1]
> https://github.com/CodeFX-org/demo-java-9/tree/master/src/org/codefx/demo/java9/api/platform_logging
> [2]
> http://download.java.net/java/jdk9/docs/api/java/lang/System.LoggerFinder.html
>
>
>