Dependency Injection Manager for javascript.
dm.js is a javascript library that implements dependency injection pattern. It could work both in node or browser.
It takes care of asynchronous creating, configuring and injecting objects aka services inside of your code.
There is a good chance to keep your application design loose coupled, well structured and flexible with dependency injection pattern.
If you are not familiar with dependency injection pattern, use wiki to get more theory info.
var DM = require("dm"),
Async = require("dm/lib/async/q"),
Loader = require("dm/lib/loader/cjs"),
dm;
dm = new DM(new Async(Q), new Loader(require), {
parameters: {
"logs": "/var/log/app/"
},
services: {
"logger": {
// this is where the loader must get a constructor for this service
"path": "./src/log/logger/polylogue.js",
// this is what calls dm must do on just created service
"calls": [
// '@' symbol is the link to another service from config
[ "addHandler", ["@handler"] ]
]
},
"handler": {
"path": "./src/log/handler/file.js",
// this is what arguments pass to the constructor
"arguments": [
{
// '%' symbol is the getter of parameter from config (defined above)
// curly braces is a kinda simple templating feature (works with '@', '#' and '%')
"path": "%{logs}/log.txt"
}
]
}
}
});
dm
.get("logger")
.then(function(logger) {
// now we got instantiated and configured logger
logger.info("Hello! It works!");
});
DM can:
Full syntax definition you can find in the wiki.
There is a wiki for dive deep with dm usage, syntax and ideology. Also, you can check the API docs.
All developing version are available to install from npm as [email protected]
.
To publish new release candidate (rc abbr) just do npm publish --tag x.y.z-rc
and bump version in package.json x.y.z-rc0
.