[#BloombergLP-ball-ObserverFormatterImp-2constructor]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/ball.adoc[ball]::xref:BloombergLP/ball/ObserverFormatterImp.adoc[ObserverFormatterImp]::ObserverFormatterImp
:relfileprefix: ../../../
:mrdocs:

Create a `ObserverFormatterImp` instance that formats log records using the specified `format` and `timezoneDefault`.

== Synopsis

Declared in `<ball_observerformatterimp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
ObserverFormatterImp(
    std::string_view const& format,
    xref:BloombergLP/ball/ObserverFormatterImp.adoc[TimezoneEnum] timezoneDefault,
    xref:BloombergLP/ball/ObserverFormatterImp/allocator_type.adoc[allocator_type] const& allocator = allocator_type());
----

== Description

It is strongly advised to specify UTC for timezoneDefault. Optionally specify an `allocator` (e.g., the address of a `bslma::Allocator` object) to supply memory; otherwise, the default allocator is used. The behavior is undefined unless `format` is a valid format string (either one that starts with a scheme or a "text" scheme format). Note that not giving a valid default format string by the observer will result in no logging output if no valid format is set afterwards, so it is a serious error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *format*
| format configuration string used to create the formatter
| *timezoneDefault*
| default time zone for timestamps without one
| *allocator*
| allocator used to supply memory
|===


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