Please see https://logging.apache.org/log4j/2.x/manual/extending.html
Gary
On Mon, May 18, 2015 at 8:30 AM, Chathura Priyankara <
priyankara...@gmail.com> wrote:
> Hi Gary,
>
> Thanks for the prompt response.
> (For my purpose cannot use Thread context maps because these log
> information are highly user configurable)
> Could you please tell me one thing. If I have custom pattern layout plugin
> eg: (plugin name = CustomPatternLayout).
> How would I configure this for a particular appender using log4j2.xml?
>
> Eg:
>
> <Console name="CONSOLE" target="SYSTEM_OUT">
> <PatternLayout pattern="%U%D[%T]"/>
> </Console>
>
> Here how can I configure console appender to use my CustomPatternLayout ?
>
> Thanks.
>
>
> On Mon, May 18, 2015 at 8:46 PM, Gary Gregory <garydgreg...@gmail.com>
> wrote:
>
>> Can you achieve the same result with Thread context perhap?
>>
>> Gary
>>
>>
>> -------- Original message --------
>> From: Chathura Priyankara <priyankara...@gmail.com>
>> Date: 05/18/2015 07:40 (GMT-08:00)
>> To: Log4J Developers List <log4j-dev@logging.apache.org>
>> Subject: Re: [Dev][log4j2] How to create custom pattern layout in log4j2
>>
>> 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>
>> 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> 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
>>>
>>>
>>
>>
>> --
>> Chathura Priyankara,
>> Faculty of Information Technology,
>> University of Moratuwa.
>> Blog : www.codeoncloud.blogspot.com
>>
>
>
>
> --
> Chathura Priyankara,
> Faculty of Information Technology,
> University of Moratuwa.
> Blog : www.codeoncloud.blogspot.com
>
--
E-Mail: garydgreg...@gmail.com | ggreg...@apache.org
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