Can't get Platform Logging to work

[Nicolai Parlog]

 Hi Daniel,

thanks for the quick reply. And you are of course right.

Luckily I don't care about the specific G1 message. After setting
everything up, I was looking for _anything_ that logs a message and that
was the first thing I came up with. Forgot the "platform classes" in the
first sentence. :(

Any idea what else I could use that logs messages via the new API?

 so long ... Nicolai



On 19.08.2016 17:16, Daniel Fuchs wrote:
> 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.LoggerFi
nder.html
>>
>>
>>
>>
>
>> 
-- 

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