[#BloombergLP-ball-AsyncFileObserver-2constructor-0e]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/ball.adoc[ball]::xref:BloombergLP/ball/AsyncFileObserver.adoc[AsyncFileObserver]::AsyncFileObserver
:relfileprefix: ../../../
:mrdocs:

Create an async file observer that asynchronously publishes log records to `stdout` if their severity is at least as severe as the optionally specified `stdoutThreshold` level, and has file logging initially disabled. If `stdoutThreshold` is not specified, log records are published to `stdout` if their severity is at least as severe as `Severity::e_WARN`. Optionally specify a `basicAllocator` used to supply memory. If `basicAllocator` is 0, the currently installed default allocator is used. Records received by the `publish` method are appended to a queue having a maximum (fixed) length of 8192, and published later by an independent publication thread. All records received while the queue is full are discarded. (See {Log Record Queue} for further information.) Note that `isPublishInLocalTimeEnabled` returns `false` following construction indicating that the timestamp attribute of published records will be written in UTC time (see `enablePublishInLocalTime`). Also note that independent default record formats are in effect for `stdout` and file logging (see `setLogFormat`).

== Synopsis

Declared in `<ball_asyncfileobserver.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
AsyncFileObserver(xref:BloombergLP/bslma/Allocator.adoc[bslma::Allocator]* basicAllocator = 0);
----


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