Dispatching to different functions inside a script based on the parameter

read.js

function read(query, user, request) {

    var dispatch = {
        op1 : operation1,
        op2 : operation2,
    }

    if (request.parameters.operation && dispatch.hasOwnProperty(request.parameters.operation)) {
        dispatch[request.parameters.operation](query, user, request);
        return;
    }
    else 
    {
        // default path for execution
        request.execute();
    }
}

function operation1(query, user, request) {
    request.respond(200, "this result is from operation1");
}

function operation2(query, user, request) {
    request.respond(200, "this result is from operation2");
}