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Groups > comp.lang.java.programmer > #20942

Re: dependency injection and loggers

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On 1/4/2013 4:00 AM, Tomer wrote:
> I love the concept of dependency injection via ctor. it simplifies
> life and makes testing easy. what about logger? i usually instantiate
> it in private static logger = Logger.getLogger(myclass); however this
> is not dependency injection, should I pass the logger into each ctor?
> this would look wierd... so what to do about loggers and depedency
> injection?


I agree with you on both counts.  Ctors are an excellent way of 
implementing dependency injection, and static methods aren't.

However loggers are more of an aspect than a dependency.  Absent some 
other framework (AOP, for example, or some sort of annotation 
processing), good old frameworks and libraries solve this problem.  Have 
a look at Apache logging:

<http://commons.apache.org/logging/>

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dependency injection and loggers Tomer <tomerbd1@gmail.com> - 2013-01-04 04:00 -0800
  Re: dependency injection and loggers markspace <markspace@nospam.nospam> - 2013-01-04 07:13 -0800
    Re: dependency injection and loggers Kevin McMurtrie <mcmurtrie@pixelmemory.us> - 2013-01-04 09:18 -0800
      Re: dependency injection and loggers Arne Vajhøj <arne@vajhoej.dk> - 2013-01-04 22:27 -0500
        Re: dependency injection and loggers Wayne <nospam@all.invalid> - 2013-01-04 23:33 -0500
          Re: dependency injection and loggers Arved Sandstrom <asandstrom2@eastlink.ca> - 2013-01-05 11:55 -0400
            Re: dependency injection and loggers Kevin McMurtrie <mcmurtrie@pixelmemory.us> - 2013-01-05 10:01 -0800
              Re: dependency injection and loggers Arne Vajhøj <arne@vajhoej.dk> - 2013-01-05 15:17 -0500
              Re: dependency injection and loggers Arne Vajhøj <arne@vajhoej.dk> - 2013-01-05 16:37 -0500
        Re: dependency injection and loggers Lew <lewbloch@gmail.com> - 2013-01-05 12:24 -0800
          Re: dependency injection and loggers Arne Vajhøj <arne@vajhoej.dk> - 2013-01-05 16:41 -0500
    Re: dependency injection and loggers Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2013-01-04 10:31 -0800
      Re: dependency injection and loggers Lew <lewbloch@gmail.com> - 2013-01-04 11:36 -0800
        Re: dependency injection and loggers Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2013-01-04 11:57 -0800
      Re: dependency injection and loggers Arne Vajhøj <arne@vajhoej.dk> - 2013-01-04 22:28 -0500
  Re: dependency injection and loggers Arne Vajhøj <arne@vajhoej.dk> - 2013-01-04 22:24 -0500

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