NG2 Keepalive

NG2 Keepalive is a keepalive module that allows sessions to be extended across multiple servers (useful for microservices without shared sessions)

Dependencies

• @angular/common
• @angular/core
• @angular/http

Installation

npm install --save ng2-keepalive

Once installed you need to import our main module:

import {KeepaliveModule} from 'ng2-keepalive';

The only remaining part is to list the imported module in your application module, passing in a config to intialize the logger.

@NgModule({
  declarations: [AppComponent, ...],
  imports: [KeepaliveModule.forRoot({...}), ...],
  bootstrap: [AppComponent]
})
export class AppModule {
}

Usage

To use NG2 Keepalive, you will need to add it to your an application html file

<ng2-keepalive></ng2-keepalive>

Config Options

• activeInterval: {number} - (in seconds) the amount of time since a last action until the user is considered idle : default 15 seconds

• idleInterval: {number} - (in seconds) the amount of time a user is idle before the user is warned : default 15 minutes

• warnInterval: {number} - (in seconds) the amount of time a user is warned before the user session is expired : default 60 seconds

• pingInterval: {number} - (in seconds) how often the server is pinged : default 15 seconds

• idleOffset {number} - (in seconds) the offset time from your session, so that the client doesn't think the session is good when the server session expires : default 60 seconds

• pingUrls {string[]} - array of urls to ping ?extend=true will be added if the user has been active : default '/ping'

• numberOfRetries {number} - number of times failed pings should retry before erroring out