Sequence number?

[peteclark3]

Just wondering if anyone has tried to implement a sequence number as part of every subscription payload that is sent (unique per subscribed client, starting at 0 for new connections).. or if this is available in here somewhere and I'm missing it?

[mtharrison]

I think you could implement this using the filter option if you wanted to.

const seqMap = new WeakMap();

server.subscription('/item', {
    filter: function (path, message, options) {

        const seq = (seqMap.get(options.socket) || 0) + 1;
        seqMap.set(options.socket, seq);

        const override = Object.assign({}, message, { seq });

        return { override };
    }
});

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