check if key exists, react if it does.

redisSet.js

var redis = require("redis"),
client = redis.createClient();

const object = {/*full json of thing...*/ };

client.on("error", function (err) {
  console.log("Error " + err);
});

const redisKeyCreateOrContinue(object) {
  const uniqId = MD5(JSON.stringify(object));
  client.get(uniqId, (err, reply) => {
    if (reply || err) {
      // DO NOT ADD TO QUEUE WE ALREADY HAVE DONE THIS OBJECT
    } else { 
      // ADD TO QUEUE AND ADD TO SET
      client.set(uniqId, object, (response) => {
        console.log("res:", response);
      });    
    }
  })
}