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| /// ice/logging/advanced.js | |
| define(function (require, exports) { | |
| exports.log = function (message, options) { | |
| // ... | |
| }; | |
| exports.error = function (message, options) { | |
| // ... | |
| }; | |
| }); |
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| // ice/assert.js | |
| define(function (require) { | |
| var logger = require('./logging'); | |
| return function (condition, text, custom) { | |
| if (condition) { | |
| return; | |
| } | |
| if (typeof text !== 'string') { | |
| custom = text || custom || null; | |
| text = null; | |
| } | |
| return logger.error(text, { | |
| name: 'assert', | |
| condition: condition, | |
| custom: custom, | |
| exception: new Error('LOG') | |
| }); | |
| }; | |
| }); |
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| // ice/logging/console.js | |
| define(function () { | |
| return console; | |
| }); |
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| // ice/logging/loader.js | |
| define(function (require, exports, module) { | |
| var defaultLogger = module.config().logger || './console'; | |
| exports.load = function (id, parentRequire, loaded) { | |
| var require = id.indexOf('./') === 0 ? parentRequire : require; | |
| require(id, loaded); | |
| }; | |
| }); |
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| // ice/logging.js | |
| define(function (require) { | |
| return require('./loader!'); | |
| }); |
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Sample</title> | |
| </head> | |
| <body> | |
| <script src="dojo/dojo.js"></script> | |
| <script> | |
| require({ | |
| config: { | |
| 'ice/loader': { | |
| logger: 'ice/logging/advanced' | |
| } | |
| } | |
| }, ['ice/assert'], function (assert) { | |
| // when assert is used, it uses the advanced | |
| // logging facilities | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Sample</title> | |
| </head> | |
| <body> | |
| <script src="dojo/dojo.js"></script> | |
| <script> | |
| require(['ice/assert'], function (assert) { | |
| // when assert is used, it uses the native | |
| // console object for logging | |
| }); | |
| </script> | |
| </body> | |
| </html> |
Very cool! Essentially it shows how to masquerade a logging facility as a primordial console object, and how to switch between them rather seamlessly. Besides the ability to use a basic logging practically for free, demonstrates the other side of the coin: it allows to retrofit an existing code with a flexible logging.
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Excellent example of how to solve the problem at hand as well as demonstrate a powerful AMD idiom.
In this case, I think it could be simplified by configuring the module ice/logging/loader and then require that module instead of ice/logging in ice assert. This would eliminate the logging module.