A package to help you publish the count of a cursor in near real time. Interval based counting suitable for very large collections and high user load.
new Counter(name, cursor, [updateInterval])
name is a string used to fetch the count of the count
cursor is a collection query that will be counted
updateInterval defaults to 10000, which will update the count every 10 seconds.
Counts that are specific to a user or parameter must be declared within the publish function. This will create 1 counter for each user who subscribes.
Meteor.publish('countPublish', function(someValue) {
return new Counter('countCollection', Collection.find({
userId:this.userId,
someField:someValue
}));
});
Server scoped counts that are defined outside of publish functions are more efficient that specific counts as it only creates 1 counter per server.
var counter = new Counter('countCollection', Collection.find({}));
Meteor.publish('countPublish', function() {
return counter;
});
Subscribe to the publication from client side code.
Meteor.subscribe('countPublish');
Define a global helper
UI.registerHelper("getCount", function(name) {
if(name)
return Counter.get(name);
});
Call from within a template
...
{{getCount 'countCollection'}}
...
Inspired by publish-counts which is great, but does run into performance issues with large collections
Performant solution derived directly from bullet-counter
MIT