一 生命周期回调

beforeStartup(app, cb)
before application start components callback
Arguments
app - application object
cb - callback function


afterStartup(app, cb)
after application start components callback
Arguments
app - application object
cb - callback function


beforeShutdown(app, cb)
before application stop components callback
Arguments
app - application object
cb - callback function


afterStartAll(app)
after all applications started callback
Arguments
app - application object

module.exports.beforeStartup = function(app, cb) {
    // do some operations before application start up
    cb();
};


module.exports.afterStartup = function(app, cb) {
    // do some operations after application start up
    cb();
};


module.exports.beforeShutdown = function(app, cb) {
    // do some operations before application shutdown down
    cb();
};


module.exports.afterStartAll = function(app) {
    // do some operations after all applications start up
};

二 组件

// components/HelloWorld.js
module.exports = function(app, opts) {
  return new HelloWorld(app, opts);
};


var HelloWorld = function(app, opts) {
  this.app = app;
  this.interval = opts.interval | DEFAULT_INTERVAL;
};


HelloWorld.name = '__HelloWorld__';


HelloWorld.prototype.start = function(cb) {
  console.log('Hello World Start');
  cb();
}


HelloWorld.prototype.afterStart = function (cb) {
  console.log('Hello World afterStart');
  cb();
}


HelloWorld.prototype.stop = function(force, cb) {
  console.log('Hello World stop');
  cb();
}

var helloWorld = require('./app/components/HelloWorld');


app.configure('production|development', 'master', function() {
  app.load(helloWorld, {interval: 5000});
});

三 示例

我这边是在arena服务中加入了lifecycle，同时加了一个组件，过程如下。

1 启动过程

2 关闭过程

pomelo生命周期回调和组件添加

原文：http://blog.csdn.net/xufeng0991/article/details/46602653