GoogleCodeExporter
commented
9 years ago A quick hack that works till that fix is released, that won't just give you
context
information about the injectee, but also any additional information (like the
logging
channel).
Using method injection and a simple interceptor ;)
V=========== Sample Usage ================V
private Logger logger;
@Inject
@LogFactory
@LogChannel("Module1LoggingChannel")
@SuppressWarnings("unused")
private void setLogger(Provider<LoggerFactory> loggerFactory, Logger logger)
{
this.logger = logger;
}
private void someMethod()
{
logger.info("i've been called, and the logger have been injected correctly !");
}
^======== END Sample Usage ==============^
V=========== LoggingModule ===============V
public class LoggerModule extends AbstractModule {
@Override
protected void configure() {
bind(Logger.class).toInstance(
new LoggerFactory().getExceptionThrowingLogger()); // so that if injection
isn't performed, this logger will produce an exception
bindInterceptor(Matchers.any(), Matchers
.annotatedWith(LogFactory.class), new MethodInterceptor() {
@SuppressWarnings("unchecked")
@Override
public Object invoke(MethodInvocation invocation) throws Throwable {
Provider<LoggerFactory> provider = (Provider<LoggerFactory>) invocation
.getArguments()[0]; // injected by guice
String channel = null;
LogChannel lc = invocation.getMethod().getAnnotation(
LogChannel.class);
if (lc != null)
channel = lc.value();
Class clazz = invocation.getMethod().getDeclaringClass();
Logger logger = provider.get().getLogger(clazz, channel);
invocation.getArguments()[1] = logger; // override the exception-throwing
logger injected by guice !
return invocation.proceed();
}
});
}
}
^=========== END LoggingModule ===========^
It works and everything but adds the burden of adding that dummy method to every
class you want to log from.Original comment by mohammad...@gmail.com on 18 Apr 2009 at 11:33
Original issue reported on code.google.com by
limpbizkiton 3 Nov 2008 at 11:41