Thanks for your reply, Toby.
I am using log4j because I want to be consistent with some existing
modules/classes. I did the following:
import org.apache.log4j.Logger;
I just saw http://logging.apache.org/log4j/1.2/faq.html#duplicate-messages.
log4j call is cumulative/additive. I called the
BasicConfigurator.configure(); methods more than once. Now it is
fixed.
Again, thanks.
On Sep 23, 2:20 pm, Toby Reyelts <to...@google.com> wrote:
> You're using java.util.logging, not log4j. What does your logging.properties
> file look like?
>
> On Wed, Sep 23, 2009 at 5:02 PM, Pion <onlee2...@gmail.com> wrote:
>
> > I have the following code snippet:
>
> > public class FooServiceImpl extends RemoteServiceServlet implements
> > ControllerInputService {
>
> > �...@override
> > public String bar(String input) {
> > ...
> > logger.debug("Entering ... bar()");
> > ...
> > }
>
> > private static final Logger logger = Logger.getLogger
> > (FooServiceImpl .class.getName());
> > } // FooServiceImpl
>
> > It prints out the following messages:
>
> > 0 [btpool0-3] DEBUG com.col.server.FooServiceImpl - Entering ... bar()
> > 0 [btpool0-3] DEBUG com.col.server.FooServiceImpl - Entering ... bar()
> > 0 [btpool0-3] DEBUG com.col.server.FooServiceImpl - Entering ... bar()
>
> > Notice that it prints out more than 1 time. I double/triple checked
> > that I only call the bar() method once.
>
> > Then, I modified the code as the following:
>
> > public class FooServiceImpl extends RemoteServiceServlet implements
> > ControllerInputService {
>
> > �...@override
> > public String bar(String input) {
> > ...
> > counter++;
> > logger.debug(counter + " Entering ... bar()");
> > System.out.println(counter + " Entering ... bar() from
> > System.out.println()");
> > ...
> > }
>
> > private int counter = 0;
>
> > private static final Logger logger = Logger.getLogger
> > (FooServiceImpl .class.getName());
> > } // FooServiceImpl
>
> > It produces the following output:
>
> > 0 [btpool0-3] DEBUG com.col.server.FooServiceImpl - 1 Entering ... bar
> > ()
> > 0 [btpool0-3] DEBUG com.col.server.FooServiceImpl - 1 Entering ... bar
> > ()
> > 0 [btpool0-3] DEBUG com.col.server.FooServiceImpl - 1 Entering ... bar
> > ()
> > 1 Entering ... bar() from System.out.println()
>
> > Notice that there are still several log outputs (not as expected - I
> > only expect only 1 output) but only one output from System.out.println
> > () (as expected) and the counter is still 1 (as expected).
>
> > My log4j.properties
>
> > # A default log4j configuration for log4j users.
> > #
> > # To use this configuration, deploy it into your application's WEB-INF/
> > classes
> > # directory. You are also encouraged to edit it as you like.
>
> > # Configure the console as our one appender
> > log4j.appender.A1=org.apache.log4j.ConsoleAppender
> > log4j.appender.A1.layout=org.apache.log4j.PatternLayout
> > log4j.appender.A1.layout.ConversionPattern=%d{HH:mm:ss,SSS} %-5p [%c]
> > - %m%n
>
> > My environtments: GAE 1.2.5, GWT 1.7, Eclipse-Galileo on Windows
> > Vista.
>
> > Why do I have several log output?
>
> > Thanks in advance for your help.
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