Done that way for consistency.
if the connection already exists it doesn't recreate it, It passes the
existing one to the callback.
On 4/9/2012 2:11 AM, Roly Fentanes wrote:
Why are you reconnecting to the db every time a user connects? If that
is necessary, as in if the db connection depends on the user
connecting, then define a function which given a query, connects to
the db if not already connected, then executes the query after it
connects. Then it disconnects from the db when the user disconnects.
Javascript isn't forcing you to nest your callbacks so much. It's
flexible enough to let you define the ways you use asynchronous functions.
On Sunday, April 8, 2012 5:42:14 PM UTC-7, Matthew Hazlett wrote:
I'm trying to write a simple app that preforms a db query when a user
connects to a tcp port.
I can get the query working if I do everything as callbacks:
db.open(... fn() {
db.collection(.... fn() {
db.query(...... fn() {
});
});
});
But as you can see this creates callback hell.
What I would like to do is have a class, but being as everything is
async it makes it incredibly difficult to ensure all your
variables are
set.
var client;
db.connect(connect, fn(){
client = connect;
});
client.close();
Will cause an error because client hasn't been set yet. Another
thing I
thought of doing was chaining it all together:
db.connect(connect, fn(){
...
process.nextTick(fn(){ doNext(); });
});
this gets very messy and hard to manage, how can I deal with
callback hell?
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