[jira] [Commented] (LOG4J2-1326) Provide support for CharSequence parameters for low and zero-GC applications

["Remko Popma (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LOG4J2-1326?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15208027#comment-15208027 ] 

Remko Popma commented on LOG4J2-1326:
-------------------------------------

Vlad, thanks for raising this request.

To clarify, you are proposing to modify the current Logger API methods that take a String parameter to instead take a CharSequence, correct?

Before:
{code}
//org.apache.logging.log4j.Logger
debug(Marker marker, String message)
debug(Marker marker, String message, Object... params)
debug(Marker marker, String message, Supplier<?>... paramSuppliers)
debug(Marker marker, String message, Throwable t)
debug(String message)
debug(String message, Object... params)
debug(String message, Supplier<?>... paramSuppliers)
debug(String message, Throwable t)
{code}

After:
{code}
//org.apache.logging.log4j.Logger
debug(Marker marker, CharSequence message)
debug(Marker marker, CharSequence message, Object... params)
debug(Marker marker, CharSequence message, Supplier<?>... paramSuppliers)
debug(Marker marker, CharSequence message, Throwable t)
debug(CharSequence message)
debug(CharSequence message, Object... params)
debug(CharSequence message, Supplier<?>... paramSuppliers)
debug(CharSequence message, Throwable t)
{code}


> Provide support for CharSequence parameters for low and zero-GC applications
> ----------------------------------------------------------------------------
>
>                 Key: LOG4J2-1326
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1326
>             Project: Log4j 2
>          Issue Type: New Feature
>          Components: API
>    Affects Versions: 2.5
>            Reporter: Vlad Shurupov
>              Labels: features, performance
>
> Currently, the preferred way of logging character sequences in log4j 2 is by passing in tokens of type {{java.lang.String}}. It would be very beneficial if the API could provide methods that take {{java.lang.CharSequence}} tokens. This would allow high performance zero or low-GC applications to re-use the existing mutable structures implementing {{java.lang.CharSequence}}  for continuous logging without new objects being created.
> A high-performance implementation of the logger would be expected to copy out the contents of a single or multiple instances of {{java.lang.CharSequence}} so that they could be re-used in the subsequent logging call.



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