1. look into using fileappenders, or even better rolling file appenders. 2. in the log4j api find patternlayout. it has very good documentation.
d Used to output the date of the logging event. The date conversion specifier may be followed by a date format specifier enclosed between braces. For example, %d{HH:mm:ss,SSS} or %d{dd MMM yyyy HH:mm:ss,SSS}. If no date format specifier is given then ISO8601 format is assumed.
The date format specifier admits the same syntax as the time pattern string of the <http://java.sun.com/products/jdk/1.3/docs/api/java/text/SimpleDateFormat.html>SimpleDateFormat. Although part of the standard JDK, the performance of SimpleDateFormat is quite poor.
For better results it is recommended to use the log4j date formatters. These can be specified using one of the strings "ABSOLUTE", "DATE" and "ISO8601" for specifying <../../../org/apache/log4j/helpers/AbsoluteTimeDateFormat.htm>AbsoluteTimeDateFormat, <../../../org/apache/log4j/helpers/DateTimeDateFormat.htm>DateTimeDateFormat and respectively <../../../org/apache/log4j/helpers/ISO8601DateFormat.htm>ISO8601DateFormat. For example, %d{ISO8601} or %d{ABSOLUTE}.
These dedicated date formatters perform significantly better than <http://java.sun.com/products/jdk/1.3/docs/api/java/text/SimpleDateFormat.html>SimpleDateFormat.
Hope this helps
At 12:54 PM 7/3/2003, you wrote:
OK, with my current configuration, I *am* seeing output in catalina.out. However, its not formatted the way I (think I) told it to. Also, I would prefer to have the output go to a separate log file, as there is just too much stuff in catalina.out to wade through.
Anyway, I am using RH9, jakarta-tomcat-4.1.24, and log4j-1.2.8. For my webapp, I am creating a war file that has log4j.properties in the WEB-INF/classes directory. I dropped log4j-1.2.8.jar into the WEB-INF/lib directory.
The log4j.properties file looks like this:
log4j.logger.fermataintl.migrasponder=DEBUG, console log4j.appender.console=org.apache.log4j.ConsoleAppender log4j.appender.console.layout=org.apache.log4j.PatternLayout log4j.appender.console.layout.ConversionPattern=%d [%t] %-5p %F:%L - %m%n =================================================================
I am not explicitly initializing log4j. A class that I am using in my app invokes logging as follows:
package fermataintl.migrasponder.common; import java.sql.*; import org.apache.log4j.*;
public class Vendor { ... logger.warn("attempt to authenticate '" + id + "' failed"); ... private static Logger logger = Logger.getLogger(Vendor.class); } ==================================================================
When I run my app and exercise the bit of code containing the warning above, it puts the following in catalina.out:
1571947 [Thread-5] WARN common.Vendor - attempt to authenticate 'xxx' failed =================================================================== So... my questions are:
1) How do I get output to a file of my own choosing 2) How do I get the formatting to come out with date and time prepended?
Thanks. Dean Hoover
PS. I looked for the commercial manual (on the website) at 2 local bookstores and on amazon.com. Nobody has it. I hesitate to order from
Switzerland, as I am in the US. How long would that take...
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