On Sun, Jan 11, 2015 at 9:59 AM, Richard Sharpe <[email protected]> wrote: > Hi folks, > > I am not sure if this is the correct interface, however, I am trying > to develop a config backend for Samba that connects to Zookeeper. The > intent is that parts of Samba's smb.conf would be stored in zookeeper > to make life easier in clustered environments. > > I am constrained to use C both by the code I am working with and by > inclination. The examples in C are somewhat sparse. > > I am trying to use the sync interface at the moment and I get zero > children back when I call zoo_get_children, however, if I use cli_mt I > can see that there is one child node under /samba in zookeeper: > > [root@localhost zookeeper-3.4.6]# ./src/c/cli_mt localhost:2181 > Watcher SESSION_EVENT state = CONNECTED_STATE > Got a new session id: 0x14accb10de10004 > > ls / > time = 1 msec > /: rc = 0 > samba > zookeeper > time = 1 msec > ls /samba > time = 1 msec > /samba: rc = 0 > global > time = 1 msec > > I am pretty certain that I am asking for the children of /samba as my > logging code shows me that I am feeding that path to zoo_get_children > and when I had a bug that appended a trailing slash I got error -8 > back. > > Here are what I think are the relevant parts of the code I have at the moment: > > ------- > static void zoo_watcher(zhandle_t *zzh, int type, int state, const char *path, > void *context) > { > DEBUG(10, ("%s called\n",__func__)); > } > > ... > > zh = zookeeper_init(host_port, zoo_watcher, 30000, &myId, 0, 0); > if (!zh) { > DEBUG(10, ("Problem with zookeeper_init: %s\n", > strerror(errno))); > } > > ... > > struct String_vector strings; > ... > > rc = zoo_get_children(zh, zookeeper_key, false, &strings); > -------------- > > There are hints in the test code for the C client interface that > perhaps I should be doing something real in the watcher function above > but I am not sure. > > Any hints would be appreciated.
OK, it looks like the problem was my confusion between the single threaded library and the multi-threaded library. I was trying to use the _st library, but it seems I need more infrastructure for that. I wrote a small simple test program and after linking it with the _mt library things are working. -- Regards, Richard Sharpe (何以解憂？唯有杜康。--曹操)
