Spring 3 SimpleMappingExceptionResolver warnLogCategory log4j

Question

<bean id="exceptionResolver" class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
    <property name="exceptionMappings">
            <map>
              <entry key="java.lang.Exception" value="error"/>
            </map>
          </property>
<property name="warnLogCategory" value="abcdefg"/>
</bean>

I would like to log the exception above into a .log file, but it does not log =(. Could someone comment on what might be wrong with my log4j properties...or anything else?

Using Spring 3.0.5

thanks

log4j.rootLogger=DEBUG, stdout, pqe
log4j.category.abcdefg=WARN, pqe

log4j.appender.pqe=org.apache.log4j.DailyRollingFileAppender
log4j.appender.pqe.DatePattern=_yyyyMMdd
log4j.appender.pqe.File=D:\\pqe.log
log4j.appender.pqe.layout=org.apache.log4j.PatternLayout
log4j.appender.pqe.layout.ConversionPattern=%d|%5p|%c %m%n

Answer 1

my solution is override method logException in SimpleMappingExceptionResolver

new resolver:

public class LoggingExceptionResolver extends SimpleMappingExceptionResolver {
private Logger logger = LoggerFactory.getLogger(LoggingExceptionResolver.class);

@Override
protected void logException(Exception ex, HttpServletRequest request) {
    this.logger.warn(buildLogMessage(ex, request), ex);
}

}

spring config:

<bean id="exceptionResolver" class="com.zyam.isu.core.utils.log.LoggingExceptionResolver">
    <property name="defaultErrorView">
        <value>error.jsp</value>
    </property>
    <property name="exceptionMappings">
        <props>
            <prop key="java.lang.RuntimeException">error.jsp</prop>
            <prop key="java.lang.Exception">error.jsp</prop>
        </props>
    </property>
</bean>

logback.xml

    <logger name="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
    <level value="warn" />
</logger>

I think logback config is similar with log4j, hope could help you

Answer 2

Try to extend it with something like:

public class LoggingExceptionResolver extends SimpleMappingExceptionResolver {

     public LoggingExceptionResolver(String category) {
         super();
         this.warnLogger = LoggerFactory.getLogger(category); // or whatever log implementation
     }

}

<bean id="exceptionResolver" class="package.name.LoggingExceptionResolver">
    <constructor-arg value="abcdefg"/>
    <property name="exceptionMappings">
        <map>
            <entry key="java.lang.Exception" value="error"/>
        </map>
    </property>
</bean>

But this is basically the same thing as:

<!-- whatever the implmentation/class name is -->
<bean id="log" class="org.apache.log4j.logger.Logger" factory-method="getLogger">
    <constructor-arg value="abcdefg"/>
</bean>

<bean id="exceptionResolver" class="package.name.LoggingExceptionResolver">
    <property name="warnLogger" ref="log" />
    <property name="exceptionMappings">
        <map>
            <entry key="java.lang.Exception" value="error"/>
        </map>
    </property>
</bean>

with the correct log4j.logger.abcdefg=WARN