end prefix with a space

Hey guys,

whenever I add a space at the end of my pattern it’s not respected. I tried to use xml:space="preserve" but it doesn’t work.

I’d like to get something like

<14> 2016-10-07T21:10:42.458Z log.json {"@timestamp":"2016-10-07T23:10:42.458+02:00"...

but I get

<14> 2016-10-07T21:10:42.458Z log.json{"@timestamp":"2016-10-07T23:10:42.458+02:00"...
                                      ^

Here is the configuration I use :

<appender name="loghost" class="net.logstash.logback.appender.LogstashTcpSocketAppender">
    <remoteHost>localhost</remoteHost>
    <encoder class="net.logstash.logback.encoder.LogstashEncoder">
      <prefix class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
          <layout class="ch.qos.logback.classic.PatternLayout">
            <pattern xml:space="preserve">&lt;14&gt; %date{"yyyy-MM-dd'T'HH:mm:ss.SSS", UTC}Z log.json </pattern>
          </layout>
      </prefix>
   </encoder>
  </appender>

Any idea how to fix it ?

Thank you

[philsttr]

Ah hah! I just found another hack/workaround that doesn’t require any code.

Try this:

<pattern xml:space="preserve">&lt;14&gt; %date{"yyyy-MM-dd'T'HH:mm:ss.SSS", UTC}Z%1mdc{keyThatWillNeverExist}</pattern>

This tells logback to output the MDC value with the key named keyThatWillNeverExist (which obviously doesn’t exist), and pad the value by 1. This will always output one space.

[cscetbon]

Thank you so much @philsttr. It works exactly like I wanted. I was going to use your first method when I saw it but not having to compile anything is far better. I agree that we should have a way to add a space without using such hacky ways … FYI, I’ve also removed xml:space="preserve" which doesn’t seem necessary