Context vs Callback in AWS Lambda

Question

I am loving using lambda functions in AWS. It ideally reduced my time in maintaining the servers anymore. My question is when using lambda there is context object and the callback function to terminate the function. Is there any use case of using callback over context.

Could anyone tell me the behavior of context.succeed() to callback(error,message)

var startedAt = new Date();

var interval = setInterval(function () {
    console.log(startedAt, new Date());
}, 1000);

exports.handler = function (event, context, callback) {
    setTimeout(function () {
        console.log('returning');
        // v1:
        return callback(null);
        // v2:
        // return context.succeed();
    }, 5000);
};

Answer 1

context.succeed is the older way of doing things, and is supported under the 0.10.42 runtime (where the callback parameter specifically isn't). If you're running on the newer runtimes (4.3 and 6.10), it's included for backwards compatibility, but the "proper" way is now to use the callback functionality.