Oops. Nevermind. I was remembering the code incorrectly. You didn’t make it 
more complicated. I did.

Ralph

On Sep 1, 2014, at 10:00 PM, Ralph Goers <[email protected]> wrote:

> Actually, it was that simple but you made it more complicated by creating a 
> Map of Maps.  Why is that needed?  
> 
> I am not convinced this is a good idea.
> 
> Ralph
> 
> On Sep 1, 2014, at 8:49 PM, Matt Sicker <[email protected]> wrote:
> 
>> I'm updating log4j-jdk to use log4j-core if available. A similar pattern 
>> might be useful for the 1.2 bridge. Plus, the duplicate code isn't just the 
>> map; it's everything in AbstractExternalLoggerContextRegistry. Here, take a 
>> look:
>> 
>> https://git-wip-us.apache.org/repos/asf?p=logging-log4j2.git;a=blob_plain;f=log4j-api/src/main/java/org/apache/logging/log4j/spi/AbstractExternalLoggerContextRegistry.java;h=9e7a8fcdf43eae0a3ac0eb2163ab1da39bbce987;hb=LOG4J2-608
>> 
>> 
>> On 1 September 2014 22:24, Ralph Goers <[email protected]> wrote:
>> Yes, I would recommend trying to make log4j-jdk dependent only on the log4j 
>> 2 api.  However, if there is some functionality that is crucial to how jul 
>> works then go ahead and make it be dependent on core.  I believe 
>> getParents() is the reason the log4j 1.2 bridge is dependent on core.
>> 
>> Ralph
>> 
>> On Sep 1, 2014, at 7:42 PM, Matt Sicker <[email protected]> wrote:
>> 
>>> Oh man, should I make log4j-jdk depend only on log4j-api then? That limits 
>>> functionality. No support for setLevel(), getParent(), plus it limits the 
>>> ability to add support for Handler classes in the future (I already added 
>>> support for JUL's Filter interface).
>>> 
>>> The duplicate code is also in log4j-1.2-api. Here's a snippet:
>>> 
>>>     private static final Map<LoggerContext, ConcurrentMap<String, Logger>> 
>>> CONTEXT_MAP =
>>>         new WeakHashMap<LoggerContext, ConcurrentMap<String, Logger>>();
>>> 
>>> I'll refactor this one, too, so you can see it all together in the 
>>> LOG4J2-608 branch.
>>> 
>>> 
>>> On 1 September 2014 21:26, Ralph Goers <[email protected]> wrote:
>>> I disagree. We already get comaints that the log4j 1.2 bridge requires 
>>> core. Keeping it separate allows for other implementations. Frankly, I'm 
>>> not sure the code Matt is talking about is a big enough deal to bother 
>>> refactoring it.
>>> 
>>> Sent from my iPhone
>>> 
>>> On Sep 1, 2014, at 7:08 PM, Remko Popma <[email protected]> wrote:
>>> 
>>>> I haven't looked at the code (don't know how much duplicate code we're 
>>>> talking about), but in general I would prefer putting shared logic in 
>>>> core, to keep the published api as small as possible. All the bridge 
>>>> modules need core to do useful work anyway...
>>>> 
>>>> Sent from my iPhone
>>>> 
>>>> On 2014/09/02, at 5:50, Matt Sicker <[email protected]> wrote:
>>>> 
>>>>> Yes exactly. It would be either do that, or make log4j-slf4j-impl and 
>>>>> log4j-jcl depend on log4j-core. I'm not actually sure why they don't 
>>>>> already depend on core other than the fact that they can get away without 
>>>>> using it.
>>>>> 
>>>>> 
>>>>> On 1 September 2014 15:40, Gary Gregory <[email protected]> wrote:
>>>>> So are you suggesting we put the new code in the API SPI package and not 
>>>>> in core to avoid dragging in the core jar?
>>>>> 
>>>>> Gary
>>>>> 
>>>>> 
>>>>> -------- Original message --------
>>>>> From: Matt Sicker
>>>>> Date:09/01/2014 14:16 (GMT-05:00)
>>>>> To: Log4J Developers List
>>>>> Subject: Small addition to API suggestion.
>>>>> 
>>>>> I'm working on the JDK/JUL bridge again, and I noticed that there's a bit 
>>>>> of code duplication occurring in log4j-slf4j-impl as well as log4j-jcl. 
>>>>> This duplication is further duplicated in log4j-jdk which I'm working on 
>>>>> right now.
>>>>> 
>>>>> The duplication is making a weak hash map of LoggerContext to 
>>>>> ConcurrentMap<String, L> where L is some external logger class. What I'm 
>>>>> proposing is a simple SPI class I've temporarily called 
>>>>> ExternalLoggerContextRegistry<L>. The purpose of this interface is to 
>>>>> provide a standardized way to keep track of external loggers that are 
>>>>> bridged with Log4j loggers.
>>>>> 
>>>>> I'll push this work into a branch called LOG4J2-608 which is the JDK 
>>>>> logging bridge ticket. Class names are obviously not final. I wanted to 
>>>>> put this in core instead of api, but the bridges all use just the API.
>>>>> 
>>>>> -- 
>>>>> Matt Sicker <[email protected]>
>>>>> 
>>>>> 
>>>>> 
>>>>> -- 
>>>>> Matt Sicker <[email protected]>
>>> 
>>> 
>>> 
>>> -- 
>>> Matt Sicker <[email protected]>
>> 
>> 
>> 
>> 
>> -- 
>> Matt Sicker <[email protected]>
> 

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