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/** @page tut_mongo_sync_connect Connecting to MongoDB
*
* The next step in our journey is to connect to MongoDB: to a single
* server and to a replicaset alike.
*
* Our first task is to connect to a MongoDB server, listening
* on localhost's 27017 port. And we don't care whether it is a master
* or a secondary, so we set the slave_ok argument to TRUE:
*
* @dontinclude tut_mongo_sync.c
* @skip void
* @until mongo_sync_disconnect
* @until }
*
* It's fairly straightforward: error handling is done using errno
* values, because that saves us from inventing our own statuses:
* POSIX provides us with plenty, and the C library uses errno
* extensively well. So does libmongo-client!
*
* Next up, is connecting to a replicaset:
*
* @until return;
* @until }
*
* Wait a minute! Does this look familiar? Isn't it @b exactly the
* same as in the former example (apart from the host name)? It sure
* is! There really is no difference between connecting to a single
* server and to a replica set when using the Sync API. It hides all
* the boring things from the user.
*
* However, if the server is a replicaset, we can add seeds: seeds are
* hosts that are not listed in the replicaset's public config
* (meaning they're hidden), but we still want to be able to use them,
* if so need be.
*
* It's not neccessary to add seeds, if the replica set itself
* advertises secondaries: the library will discover those, and
* reconnect to them, if automatic reconnection is turned on. Lets
* just do that!
*
* @until }
*
* Then we can add the seeds:
* @until }
* @until }
*
* And that's about it! We wrap up our function, and we're done!
* @until }
*/
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