the reason simply because apache camel is using slf4j, http://camel.apache.org/log.html.
the slf4j library thus need to be on the classpath.
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class AnnotationTypeConverterLoader implements TypeConverterLoader {
public static final String META_INF_SERVICES = "META-INF/services/org/apache/camel/TypeConverter";
private static final transient Logger LOG = LoggerFactory.getLogger(AnnotationTypeConverterLoader.class);
...
}
3045 [main] INFO org.apache.camel.impl.converter.AnnotationTypeConverterLoader - Found 3 packages with 15 @Converter classes to load 3065 [main] INFO org.apache.camel.impl.converter.DefaultTypeConverter - Loaded 169 core type converters (total 169 type converters) 3070 [main] INFO org.apache.camel.impl.converter.AnnotationTypeConverterLoader - Loaded 2 @Converter classes
the library could be either slf4j-simple.jar or slf4j-log4j.jar:
http://www.slf4j.org/manual.html
