FooService.ts

import { Injectable } from 'angular2/core';
import { Http, Response } from "angular2/http";
import { Observable } from "rxjs/Observable";
import * as _ from "js/lodash.js";
​
import { Foo } from "./foo";
​
@Injectable()
export class FooService {
  fooList: Observable<Foo[]>;
​
  constructor(private _http: Http) {
​
    this.fooList = this._http.get('http://localhost:9090/api/').map(
      response => {
        var json = response.json();
        if(response.ok === true) {
          let newFooList: Foo[] = [];
          _.forEach(json, f => {
            newFooList.push(new Foo(f));
          });
          return newFooList;
        }
        throw Error("Bad status: " + response);
      });
  }
}