PatternLayout isn’t really designed to use an alternate implementation of
PatternParser. Why do you need one? A custom Layout wouldn’t normally use a
PatternParser, only PatternLayout and you shouldn’t need to modify that either.
Just create a new PatternConverter that does what you need it to do.
Ralph
> On May 22, 2019, at 4:18 AM, Gaurav <gaurav9...@gmail.com> wrote:
>
>
>
> On 2019/05/16 14:59:56, Matt Sicker <boa...@gmail.com> wrote:
>> Instead of extending the plugin classes, you can create your own
>> plugins. PatternConverters are relatively trivial plugins, so I
>> wouldn't worry too much about code duplication.
>>
>> I could be missing a feature, though.
>>
>> On Thu, 16 May 2019 at 09:32, Gaurav <gaurav9...@gmail.com> wrote:
>>>
>>> Hi,
>>>
>>> I want to hide the message in the throwable.
>>>
>>> What I've tried -
>>> 1. Create a custom layout by extending AbstractStringLayout.
>>> 2. Create a pattern parser.
>>> 3. Create a pattern converter by extending ThrowablePatternConverter.
>>>
>>> Is there a simpler way to do this?
>>>
>>> In log4j1.2, it was simple to just extend the classes, but the classes in
>>> log4j2 are final.
>>>
>>> Please assist.
>>
>>
>>
>> --
>> Matt Sicker <boa...@gmail.com>
>> Hi,
> I've created -
> 1.A custom pattern converter plugin extending LogEventPatternConverter
> 2.A custom layout plugin extending AbstractStringLayout.
> 3.A custom pattern parser similar to "PatternParser" class in log4j2.
>
> But, as, I am dealing with throwables and cannot modify log4j2 jar, I need to
> plug the custom pattern converter instance in my parser class.
>
> if (alwaysWriteExceptions && !handlesThrowable) {
> final LogEventPatternConverter pc =
> TestPatternConverter.newInstance();
> list.add(new PatternFormatter(pc, FormattingInfo.getDefault()));
> }
>
> But, at the startup, it is throwing the following exception -
>
> Caused by: java.lang.ClassCastException: com.test.TestPatternParser cannot be
> cast to org.apache.logging.log4j.core.pattern.PatternParser
> at
> org.apache.logging.log4j.core.layout.PatternLayout.createPatternParser(PatternLayout.java:244)
> at
> org.apache.logging.log4j.core.layout.PatternLayout$SerializerBuilder.build(PatternLayout.java:375)
> ... 32 more
>
> Please assist.
>
