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Description:
quiver log
Quiver Log #
Quiver log is a set of logging utilities that make it easy to configure and
manage Dart's built in logging capabilities.
Documentation #
API Docs are
available.
The Basics #
Dart's built-in logging utilities are fairly low level. This means each time you
start a new project you have to copy/paste a bunch of logging configuration
code to setup output locations and logging formats. Quiver-log provides a set of
higher-level abstractions to make it easier to get logging setup correctly.
Specifically, there are two new concepts: appender and formatter. Appenders
define output locations like the console, http or even in-memory data structures
that can store logs. Formatters, as the name implies, allow for custom logging
formats.
Here is a simple example that sets up a InMemoryAppender with a
SimpleStringFormatter:
import 'package:logging/logging.dart';
import 'package:quiver_log/log.dart';
class SimpleStringFormatter implements Formatter {
String call(LogRecord record) => record.message;
}
main() {
var logger = Logger('quiver.TestLogger');
var appender = InMemoryListAppender(SimpleStringFormatter());
appender.attachLogger(logger);
}
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That's all there is to it!
Quiver-log provides three Appenders: PrintAppender
which uses Dart's print statement to write to the console,
InMemoryListAppender which writes logs to a simple list (this can be useful for debugging or testing) and a WebAppender which will take advantage of web console methods to improve readability in your browser. Additionally, a single Formatter called
BasicLogFormatter is included and uses a "MMyy HH:mm:ss.S" format. Of course
there is no limit to what kind of appenders you can create.
To create a new kind of Appender simply extend Appender. To create a new
Formatter just implement the Formatter abstract class. Take a look at
PrintAppender and BasicLogFormatter for an example.
Making Changes and Running Tests #
All patches must be formatted using dartfmt and submitted with tests. To run the tests use:
dart run test test/all_tests.dart
dart run test -p chrome test/all_web_tests.dart
License
For personal and professional use. You cannot resell or redistribute these repositories in their original state.
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