See the RegexReplacementConverter. It does something similar. Ralph
> On May 18, 2015, at 9:10 AM, Chathura Priyankara <priyankara...@gmail.com> > wrote: > > Hi Ralph, > > Thanks for the response. > It is conditionally including that pattern. (This application uses log4j via > commons API so that I cannot use thread context maps) > Using a converter for P how could I get the part within the curly braces and > convert it ? > Does the pattern parser comes inside the Converter ? > > On Mon, May 18, 2015 at 9:15 PM, Ralph Goers <ralph.go...@dslextreme.com > <mailto:ralph.go...@dslextreme.com>> wrote: > I am a bit confused when you say if the conversion type is %P then the log > information of CustomPattern will print. Are you saying it would be as if the > pattern was > > [%d] %U%@%D[%T]%5p {%c} - %x %m%n > > ? > > If so, why isn’t the pattern just set to that? If you mean you want to > conditionally include that pattern than you would want to do something like: > > [%d] %P{%U%@%D[%T]}%5p {%c} - %x %m%n > > The pattern converter for %P should be passed the pattern within the curly > braces and would then need to create its own PatternParser instance for that > pattern and then call the formatters in the format method. > > Ralph > > > >> On May 18, 2015, at 7:40 AM, Chathura Priyankara <priyankara...@gmail.com >> <mailto:priyankara...@gmail.com>> wrote: >> >> Hi Ralph, >> >> There are some custom information that I need to log. Please see the >> following log4j properties. >> log4j.appender.CONSOLE.layout=com.test.custom.PatternLayoutClass >> log4j.appender.CONSOLE.layout.ConversionPattern=[%d] %P%5p {%c} - %x %m%n >> log4j.appender.CONSOLE.layout.CustomPattern=%U%@%D[%T] >> >> Here some custom Conversion characters such as U, D etc. are used. If the >> conversion type is %P >> for ConversionPattern then the log information of CustomPattern will print. >> Can you please tell me how could I do the same thing with log4j2 ? >> >> Thank you very much for the reply. >> >> >> On Mon, May 18, 2015 at 6:25 PM, Ralph Goers <ralph.go...@dslextreme.com >> <mailto:ralph.go...@dslextreme.com>> wrote: >> You shouldn't need to do this. What is different about your layout than >> what comes with Log4j? If you simply have a custom pattern or 2 then you >> would just implement those as converters. >> >> Ralph >> >> On May 18, 2015, at 5:41 AM, Chathura Priyankara <priyankara...@gmail.com >> <mailto:priyankara...@gmail.com>> wrote: >> >>> I have to convert a pattern layout written for log4j 1.2. to log4j2. >>> Following code snippet shows a part of it. I have searched a lot about this >>> but couldn't find a proper guide. >>> Can anyone please give me a brief guide about how to do this conversion ? >>> >>> Any help is highly appreciated! >>> >>> public class CustomPatternLayout extends PatternLayout { >>> >>> >>> public static final String DEFAULT_PATTERN = "[%T][%S]"; >>> >>> private static String customPattern = DEFAULT_PATTERN; >>> >>> >>> public CustomPatternLayout(String pattern) { >>> super(pattern); >>> } >>> >>> public synchronized void setCustomPattern(String customPattern) { >>> CustomPatternLayout.customPattern = customPattern; >>> } >>> >>> >>> private static class customPatternParser extends PatternParser { >>> >>> protected void finalizeConverter(char c) { >>> PatternConverter pc = null; >>> switch (c) { >>> case 'P': >>> pc = new UserNamePatternConverter(formattingInfo, >>> extractPrecisionOption()); >>> break; >>> . >>> . >>> . >>> default: >>> super.finalizeConverter(c); >>> } >>> if (pc != null) { >>> currentLiteral.setLength(0); >>> addConverter(pc); >>> } >>> } >>> >>> private abstract static class CustomNamedPatternConverter extends >>> PatternConverter { >>> >>> private int precision; >>> >>> public CustomNamedPatternConverter(FormattingInfo formattingInfo, >>> int precision) { >>> super(formattingInfo); >>> this.precision = precision; >>> } >>> >>> protected abstract String getFullyQualifiedName(LoggingEvent event); >>> >>> public String convert(LoggingEvent event) { >>> String n = getFullyQualifiedName(event); >>> if (n == null) { >>> return ""; >>> } >>> if (precision <= 0) { >>> return n; >>> } else { >>> int len = n.length(); >>> int end = len - 1; >>> for (int i = precision; i > 0; i--) { >>> end = n.lastIndexOf('.', end - 1); >>> if (end == -1) { >>> return n; >>> } >>> } >>> return n.substring(end + 1, len); >>> } >>> } >>> } >>> >>> private static class MyPatternConverter extends >>> CustomNamedPatternConverter { >>> >>> public MyPatternConverter(FormattingInfo formattingInfo, int >>> precision) { >>> super(formattingInfo, precision); >>> } >>> >>> public String getFullyQualifiedName(LoggingEvent event) { >>> int userId = //Get user Id >>> if ( . . .) { >>> return new CustomPatternLayout(customPattern).format(event); >>> } >>> return someOther; >>> } >>> } >>> } >>> } >>> Thanks in advance. >>> >>> -- >>> Chathura Priyankara, >>> Faculty of Information Technology, >>> University of Moratuwa. >>> Blog : www.codeoncloud.blogspot.com <http://www.codeoncloud.blogspot.com/> >> >> >> >> -- >> Chathura Priyankara, >> Faculty of Information Technology, >> University of Moratuwa. >> Blog : www.codeoncloud.blogspot.com <http://www.codeoncloud.blogspot.com/> > > > > > -- > Chathura Priyankara, > Faculty of Information Technology, > University of Moratuwa. > Blog : www.codeoncloud.blogspot.com <http://www.codeoncloud.blogspot.com/>
