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>
> 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/>
