1 // Pruned copy of crate rust log, without global logger
2 // https://github.com/rust-lang-nursery/log #7a60286
4 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
5 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
7 // option. This file may not be copied, modified, or distributed
8 // except according to those terms.
10 //! Log traits live here, which are called throughout the library to provide useful information for
11 //! debugging purposes.
13 //! There is currently 2 ways to filter log messages. First one, by using compilation features, e.g "max_level_off".
14 //! The second one, client-side by implementing check against Record Level field.
15 //! Each module may have its own Logger or share one.
20 static LOG_LEVEL_NAMES: [&'static str; 6] = ["OFF", "ERROR", "WARN", "INFO", "DEBUG", "TRACE"];
22 /// An enum representing the available verbosity levels of the logger.
23 #[derive(Copy, Clone, PartialEq, Eq, Debug, Hash)]
25 ///Designates logger being silent
27 /// Designates very serious errors
29 /// Designates hazardous situations
31 /// Designates useful information
33 /// Designates lower priority information
35 /// Designates very low priority, often extremely verbose, information
39 impl PartialOrd for Level {
41 fn partial_cmp(&self, other: &Level) -> Option<cmp::Ordering> {
46 fn lt(&self, other: &Level) -> bool {
47 (*self as usize) < *other as usize
51 fn le(&self, other: &Level) -> bool {
52 *self as usize <= *other as usize
56 fn gt(&self, other: &Level) -> bool {
57 *self as usize > *other as usize
61 fn ge(&self, other: &Level) -> bool {
62 *self as usize >= *other as usize
68 fn cmp(&self, other: &Level) -> cmp::Ordering {
69 (*self as usize).cmp(&(*other as usize))
73 impl fmt::Display for Level {
74 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
75 fmt.pad(LOG_LEVEL_NAMES[*self as usize])
80 /// Returns the most verbose logging level.
82 pub fn max() -> Level {
87 /// A Record, unit of logging output with Metadata to enable filtering
88 /// Module_path, file, line to inform on log's source
89 #[derive(Clone,Debug)]
90 pub struct Record<'a> {
91 /// The verbosity level of the message.
94 pub args: fmt::Arguments<'a>,
95 /// The module path of the message.
96 pub module_path: &'a str,
97 /// The source file containing the message.
99 /// The line containing the message.
103 impl<'a> Record<'a> {
104 /// Returns a new Record.
106 pub fn new(level: Level, args: fmt::Arguments<'a>, module_path: &'a str, file: &'a str, line: u32) -> Record<'a> {
117 /// A trait encapsulating the operations required of a logger
118 pub trait Logger: Sync + Send {
119 /// Logs the `Record`
120 fn log(&self, record: &Record);
125 use util::logger::{Logger, Level};
126 use util::test_utils::TestLogger;
130 fn test_level_show() {
131 assert_eq!("INFO", Level::Info.to_string());
132 assert_eq!("ERROR", Level::Error.to_string());
133 assert_ne!("WARN", Level::Error.to_string());
141 fn new(logger: Arc<Logger>) -> WrapperLog {
147 fn call_macros(&self) {
148 log_error!(self.logger, "This is an error");
149 log_warn!(self.logger, "This is a warning");
150 log_info!(self.logger, "This is an info");
151 log_debug!(self.logger, "This is a debug");
152 log_trace!(self.logger, "This is a trace");
157 fn test_logging_macros() {
158 let mut logger = TestLogger::new();
159 logger.enable(Level::Trace);
160 let logger : Arc<Logger> = Arc::new(logger);
161 let wrapper = WrapperLog::new(Arc::clone(&logger));
162 wrapper.call_macros();