loggerjs
v0.1.0
Published
LoggerJS enables client and server side logging using the console and any available target output type.
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Readme
LoggerJS
LoggerJS enables client side logging using the console (if available) and pushing Log Entries towards a Log Server.
Features:
- Uses the console to output information to the Browser Developer Tools.
- Supports sending the log entry (as JSON) to some Log Server.
- Supports output to the document if console is not available (no CSS provided).
- custom tasks to be processed on specified log levels.
- Handles unexpected errors in the window.
- Delivers a skeleton lib to build uppon (example: node-LoogerJS)
Please report bugs there on Github.
Usage
Set Dependency
Add following entry to your bower.json
in the dependencies
property
"dependencies": {
"LoggerJS" : "https://github.com/luscus/LoggerJS.git"
},
Bind Library
<script type="application/javascript" src="..bower_components/LoggerJS/build/loggerjs.js"></script>
Or the minified version
<script type="application/javascript" src="..bower_components/LoggerJS/build/loggerjs.min.js"></script>
Instanciate
Create a Logger instance
var options = {
namespace : 'my.awsome.project',
uniqueLogKeys: <boolean>,
status : <boolean>,
logLevel : LoggerJS.<LEVEL>,
logServerUrl : '<logging_service_url>',
tags : ['myproject', 'gui', 'something']
},
logger = new LoggerJS.Logger(options);
Here is the option list
namespace
: is mandatory and provides information about the moduleuniqueLogKeys
: the error ID (key) can be unique or shared per log message. This can be useful for some databases, it enables to group similar log entries and only increment a counter (default: true).status
: a boolean representing the logger's activity state (default: true)logLevel
: initial Log Level (default: ERROR)logServerUrl
: an url pointing to the logging servicelogServerLevel
: the Log Level as of Log are been sent to the logging servicetags
: is an Array of String that can later be used to filter the Log Entries
Custom Logging Tasks
Logging Taks are triggered each time a new LogEntry is generated. They are run after the outputing of the LogEntry.
Create new LogTask
var options = {
name: 'somename',
status: <boolean>,
logLevel : LoggerJS.<LEVEL>,
strict : <boolean>,
task: function (logEntry) {
/* do something.
You can find the LogEntry API at the end of the README */
}
},
task = new LoggerJS.LogTask(options);
Here is the option list
name
: is mandatory and provides information about the modulestatus
: a boolean representing the task's activity state (default: true)logLevel
: minimum Log Level at which the Task will be active (default: logger.status)strict
: log level check is strict, the LogTask level and the LogEntry level must match (default: false)task
: a mandatory function awaiting a LogEntry object as parameter
Register new LogTask
logger.registerLogTask(task);
Unregister new LogTask
logger.unregisterLogTask(taskOject);
or
logger.unregisterLogTask(task_name);
API
Logger
Properties
logger.status
: state of the logger: true=active, false=inactivelogger.log_level
: logger's active log level, see bellow for existing levels
Log Levels in order of priority:
LoggerJS.FATAL
: critical issue. After output, application should be brockenLoggerJS.ERROR
: critical issueLoggerJS.WARNING
: something isn't quite correct, but the application runsLoggerJS.INFO
: information about the state of the applicationLoggerJS.AUTH
: related to authentication (lowest level)LoggerJS.LOG
: generic loggingLoggerJS.PATH
: output about the function navigation of the dataLoggerJS.DEBUG
: debugging information (highest level)
setStatus
Parameters:
- status: boolean representing the logger's activity state
Examples:
// Logs will be outputed
logger.setStatus(true);
// no logs entries generated
logger.setStatus(false);
disable / enable
Wrappers for setStatus
Examples:
// Logs will be outputed
logger.enable();
// no logs entries generated
logger.disable();
setLogLevel
Parameters:
- logLevel: the new Log Level to be set
Examples:
// Log Level set to DEBUG (show all Logs)
logger.setLogLevel(LoggerJS.DEBUG);
getNamespace
Returns the namespace of the Logger. It should provide information about the module using it.
Examples:
// return example: 'loggerjs.test.run'
logger.getNamespace();
getTags
Returns the Tag Array defined for this Logger instance.
Examples:
// return example: ["my", "test", "run"]
logger.getTags();
be
Returns the activity state of the specified Log Level as Boolean.
Parameters:
- logLevel: the new Log Level to be set
Examples:
// returns boolean
logger.be(LoggerJS.DEBUG);
Web Console (no available in the skeleton)
useWebConsole
Parameters:
- parentId (String): ID of the Web Console's parent element (default: Web Console becomes first child of window.document.body)
- consoleId (String): ID of the Web Console's DIV element (default: LJSWebConsole )
Examples:
logger.useWebConsole();
logger.useWebConsole('myCustomParentElement');
logger.useWebConsole('myCustomParentElement', 'myCustomWebConsoleId');
enableWebConsole
Examples:
logger.enableWebConsole();
enableWebConsole
Examples:
logger.disableWebConsole();
cleanWebConsole
Removes console content.
Examples:
logger.cleanWebConsole();
Log Server
useLogServer
Parameters:
- url: target Log Server URL
- filter: allows to send only entries with same or higher priority as the one you specified
Examples:
logger.useLogServer('http://localhost:25998');
logger.useLogServer('http://localhost:25998', LoggerJS.ERROR);
setLogServerStatus
Parameters:
- status: boolean representing the logger's activity state
Examples:
// Logs will be outputed
logger.setLogServerStatus(true);
// no logs entries generated
logger.setLogServerStatus(false);
enableLogServer / disableLogServer
Wrappers for setLogServerStatus
Examples:
// Send logs to Log Service
logger.enableLogServer();
// no logs will be sent
logger.disableLogServer();
setLogServerLevel
Parameters:
- filter: allows to send only entries with same or higher priority as the one you specified
Example:
logger.setLogServerLevel(LoggerJS.ERROR);
Log Task
registerLogTask
Parameters:
- logTask: an LogTask object (see at the bottom for more infomation)
Example:
logger.registerLogTask(logTask);
getLogTasks
Returns all the registred tasks as an array of Objects
logger.getLogTasks();
setLogTaskLogLevel
Parameters:
- name: LogTask name
- logLevel: minimum Log Level at which the LogTask is active. Default is the logger logLevel.
Example:
logger.setLogTaskLogLevel('xyz', LoggerJS.ERROR);
disable / enable LogTask
Wrappers for setLogTaskStatus
Parameters:
- name: LogTask name
Examples:
// task turned on
logger.enableLogTask('xyz');
// task turned off
logger.disableLogTask('xyz');
setLogTaskStatus
Parameters:
- name: the Task's name
- status: boolean representing the task's activity state
Examples:
// Logs will be outputed
logger.setLogTaskStatus('xyz', true);
// no logs entries generated
logger.setLogTaskStatus('xyz', false);
unregisterLogTask
Parameters:
- logTask: an LogTask object (see at the bottom for more infomation) or a LogTask name
Examples:
// unregister using LogTask name
logger.unregisterLogTask('xyz');
// unregister using LogTask object
logger.unregisterLogTask(task);
LogEntry API
toJson
returns the full JSON Log Object
toString
returns the Log as string formated as follows:
2014-04-04T12:53:09.490Z - <namespace> - <log_level> - <path_to_file>:<line_number> - <message>
getConsolePrefix
returns part of the Log as prefix string for the console Object:
2014-04-04T12:53:09.490Z - <namespace> - <log_level> - <path_to_file>:<line_number> -