• HTTP Only and Secure Flag

Set httpOnly and secure flags on session cookie.

• JSESSIONID

For JSESSIONID, we can upgrade web servlet to version 3.0,
update web.xml as

<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

Then, in web.xml, add <cookie-config> as

<session-config>
    <cookie-config>
        <http-only>true</http-only>
        <secure>true</secure>
    </cookie-config>
</session-config>

• Interval and Clock Ticker

Use IntervalObservable in rxjs to implement interval in angular 2. Create(period) is a static method, which creates an Observable that emits sequential numbers every specified interval of time.

import { IntervalObservable } from 'rxjs/observable/IntervalObservable';
@Component({
    selector: 'demo',
    templateUrl: '<div>{{time | date:'HH:mm:ss'}}</div>'
})
export class Demo implements OnInit{
    time:number = Date.now();
    ngOnInit() {
        IntervalObservable.create(1000).subscribe(() => this.time = Date.now());
    }
}