Struct flexi_logger::LogSpecification
source · pub struct LogSpecification { /* private fields */ }
Expand description
Immutable struct that defines which loglines are to be written, based on the module, the log level, and the text.
The loglevel specification via string (relevant for methods
parse() and
env())
works essentially like with env_logger
,
but we are a bit more tolerant with spaces. Its functionality can be
described with some Backus-Naur-form:
<log_level_spec> ::= single_log_level_spec[{,single_log_level_spec}][/<text_filter>]
<single_log_level_spec> ::= <path_to_module>|<log_level>|<path_to_module>=<log_level>
<text_filter> ::= <regex>
-
Examples:
"info"
: all logs with info, warn, or error level are written"crate1"
: all logs of this crate are written, but nothing else"warn, crate2::mod_a=debug, mod_x::mod_y=trace"
: all crates log warnings and errors,mod_a
additionally debug messages, andmod_x::mod_y
is fully traced
-
If you just specify the module, without
log_level
, all levels will be traced for this module. -
If you just specify a log level, this will be applied as default to all modules without explicit log level assigment. (You see that for modules named error, warn, info, debug or trace, it is necessary to specify their loglevel explicitly).
-
The module names are compared as Strings, with the side effect that a specified module filter affects all modules whose name starts with this String.
Example:"foo"
affects e.g.foo
foo::bar
foobaz
(!)foobaz::bar
(!)
The optional text filter is applied for all modules.
Note that external module names are to be specified like in "extern crate ..."
, i.e.,
for crates with a dash in their name this means: the dash is to be replaced with
the underscore (e.g. karl_heinz
, not karl-heinz
).
Implementations§
source§impl LogSpecification
impl LogSpecification
sourcepub fn enabled(&self, level: Level, target_module: &str) -> bool
pub fn enabled(&self, level: Level, target_module: &str) -> bool
Implementation of Log::enabled() with easier testable signature
sourcepub fn off() -> LogSpecification
pub fn off() -> LogSpecification
Returns a LogSpecification
where all traces are switched off.
sourcepub fn parse(spec: &str) -> Result<LogSpecification, FlexiLoggerError>
pub fn parse(spec: &str) -> Result<LogSpecification, FlexiLoggerError>
Returns a log specification from a String.
sourcepub fn env() -> Result<LogSpecification, FlexiLoggerError>
pub fn env() -> Result<LogSpecification, FlexiLoggerError>
Returns a log specification based on the value of the environment variable RUST_LOG, or an empty one.
sourcepub fn env_or_parse<S: AsRef<str>>(
given_spec: S
) -> Result<LogSpecification, FlexiLoggerError>
pub fn env_or_parse<S: AsRef<str>>(
given_spec: S
) -> Result<LogSpecification, FlexiLoggerError>
Returns a log specification based on the value of the environment variable RUST_LOG, or on the given String.
sourcepub fn ensure_specfile_is_valid(
&self,
specfile: &PathBuf
) -> Result<(), FlexiLoggerError>
pub fn ensure_specfile_is_valid(
&self,
specfile: &PathBuf
) -> Result<(), FlexiLoggerError>
If the specfile does not exist, try to create it, with the current spec as content, under the specified name.
sourcepub fn file<P: AsRef<Path>>(
specfile: P
) -> Result<LogSpecification, FlexiLoggerError>
pub fn file<P: AsRef<Path>>(
specfile: P
) -> Result<LogSpecification, FlexiLoggerError>
Reads a log specification from a file.
sourcepub fn to_toml(&self, w: &mut dyn Write) -> Result<(), FlexiLoggerError>
pub fn to_toml(&self, w: &mut dyn Write) -> Result<(), FlexiLoggerError>
Serializes itself in toml format
sourcepub fn default(level_filter: LevelFilter) -> LogSpecBuilder
pub fn default(level_filter: LevelFilter) -> LogSpecBuilder
Creates a LogSpecBuilder, setting the default log level.
sourcepub fn module_filters(&self) -> &Vec<ModuleFilter> ⓘ
pub fn module_filters(&self) -> &Vec<ModuleFilter> ⓘ
Provides a reference to the module filters.
sourcepub fn text_filter(&self) -> &Option<Regex>
pub fn text_filter(&self) -> &Option<Regex>
Provides a reference to the text filter.
Trait Implementations§
source§impl Clone for LogSpecification
impl Clone for LogSpecification
source§fn clone(&self) -> LogSpecification
fn clone(&self) -> LogSpecification
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read more