[SP13] JS Async: Manager - People - People details

Hello everyone :-)

I'm facing a problem which is, I think, might be answered somewhere but I don't find :(

So, here it is: I want to get my SharePoint groups of my Site Collection, then the users in, finally the details of this users.

That's what I got:

function getCurrentGroups() {
    this.clientContext = new SP.ClientContext.get_current();
    var oWeb = clientContext.get_web();
	this.allGroups =  oWeb.get_siteGroups();
    this.clientContext.load(allGroups);
    this.clientContext.executeQueryAsync(Function.createDelegate(this, this.onQuerySucceededGroups), Function.createDelegate(this, this.onQueryFailedGroups));
}

function onQuerySucceededGroups() {
    var groupsEnum = allGroups.getEnumerator();
    while (groupsEnum.moveNext()) {
		console.log(groupsEnum.get_current().get_title() + " : ");
		this.allUsers = groupsEnum.get_current().get_users();
		this.clientContext.load(allUsers);
		this.clientContext.executeQueryAsync(Function.createDelegate(this, this.onQuerySuccedUser), Function.createDelegate(this, this.onQueryFailedUsers));
    }
}

function onQuerySuccedUser() {
	var usersEnum = allUsers.getEnumerator();
	while (usersEnum.moveNext()) {
		console.log(usersEnum.get_current().get_title());
	}
}

$(document).ready(function() {
	getCurrentGroups();
})

The biggest problem here, is this line:

this.clientContext.executeQueryAsync(Function.createDelegate(this, this.onQuerySuccedUser), Function.createDelegate(this, this.onQueryFailedUsers));

Because this line is in a loop and the call is async.

How can I manage to do: when the callback come back, continue the loop? Or doing something totally different, if so, tell me how you achieves this?

Thanks in advance.

Regards,
Mafyou.

Cordialement, Mafyou.