Good resources for DDP and caching

streemo · June 16, 2016, 8:14pm

Anyone have any pointers to some good, low-level, detailed discussions about DDP; how a message (added/changed/removed/addedBefore/etc.) over DDP gets stored in the client/server cache, and how Meteor observers reuse themselves and the data? Threads, Github source code, blog posts, etc. all appreciated.

Here’s a great article on the specification itself https://github.com/meteor/meteor/blob/devel/packages/ddp/DDP.md, but I’m more interested in the data-structure Meteor stores the received data in; how it tracks changes via observers, and how it notifies the necessary deps to change.

Here’s more info on SessionCollectionView:

github.com

meteor/meteor/blob/devel/packages/ddp-server/livedata_server.js#L112




 }
});


/**
* Represents a client's view of a single collection
* @param {String} collectionName Name of the collection it represents
* @param {Object.<String, Function>} sessionCallbacks The callbacks for added, changed, removed
* @class SessionCollectionView
*/
var SessionCollectionView = function (collectionName, sessionCallbacks) {
 var self = this;
 self.collectionName = collectionName;
 self.documents = {};
 self.callbacks = sessionCallbacks;
};


DDPServer._SessionCollectionView = SessionCollectionView;




_.extend(SessionCollectionView.prototype, {

Thanks!

lamhieu · January 8, 2019, 9:52am

I created a package to reduce subscriptions connect to server here, it’s maybe help you!
read more at https://atmospherejs.com/lamhieu/hypersubs