Question on sharing service about observable-store HOT 2 CLOSED

I'm not clear on the first part of the question so let me walk through a scenario and see if that helps. Observable Store sends out change notifications made by a given service. So, if your UserPermission service changes something with setState(), any subscribers hooked to userPermissionService.stateChanged would get those changes. They wouldn't get changes made to the store through CustomersService unless they called customersService.stateChanged on it and subscribed. In sum, each service that extends Observable Service only sends out changes made by that particular service.

If you want to get changes made to the store by any service you can use the myServiceName.globalStateChanged option.

To know if a specific property changed such as userSettings, use the stateWithPropertyChanges option instead of stateChanged (https://github.com/danwahlin/observable-store#store-api). Here's an example:

this.userPermissionsService.stateWithPropertyChanges.subscribe(stateWithProps => {
    if (stateWithProps && stateWithProps.stateChanges.userSettings) {
      // Do something since the userSettings property changed
    }
});

Doing that works well when you only want to run some code when a specific property changes.

As a heads-up, the latest version has a new function called getStateProperty() (see the link above for more details). Instead of retrieving (and cloning) the entire store as with getState(), it'll let you pick a specific property from the store:

// Somewhere in a service
this.getStateProperty<YourPropertyType>('userSettings');

I'm going to go ahead and close this since it isn't an issue. But, the comment functionality will continue to work.

from observable-store.

Thanks Dan! Sorry for the confusion on the question, but you definitely answered all of the questions I had.

Thanks!

from observable-store.