Storing nested javascript objects in redis - NodeJS

Question

I recently switched from memcached to redis in nodejs. The thing I liked in node-memcached was that I can save the whole javascript object in the memory. Sadly I couldn\'t d

Answer 1

First of all redis only supports the following data types:

1. String
2. List
3. Set
4. Hash
5. Sorted set

You'll need to store objects as string in both redis and memcached.

node-memcached parses/stringifies the data automatically. But node-redis doesn't.

However, you can implement your own serialization/deserialization functions for your app.

The way node-memcached stringifies an object is as follows:

if (Buffer.isBuffer(value)) {
    flag = FLAG_BINARY;
    value = value.toString('binary');
} else if (valuetype === 'number') {
    flag = FLAG_NUMERIC;
    value = value.toString();
} else if (valuetype !== 'string') {
    flag = FLAG_JSON;
    value = JSON.stringify(value);
}

It also parses the retrieved text this way:

switch (flag) {
    case FLAG_JSON:
        dataSet = JSON.parse(dataSet);
        break;
    case FLAG_NUMERIC:
        dataSet = +dataSet;
        break;
    case FLAG_BINARY:
        tmp = new Buffer(dataSet.length);
        tmp.write(dataSet, 0, 'binary');
        dataSet = tmp;
        break;
}