int cetcd_add_watcher(cetcd_array *watchers, cetcd_watcher *watcher) {
cetcd_watcher *w;
cetcd_string url;
url = cetcd_watcher_build_url(watcher->cli, watcher);
curl_easy_setopt(watcher->curl,CURLOPT_URL, url);
sdsfree(url);
watcher->attempts = cetcd_array_size(watcher->cli->addresses);
/* See above about CURLOPT_NOSIGNAL
* */
curl_easy_setopt(watcher->curl, CURLOPT_NOSIGNAL, 1L);
curl_easy_setopt(watcher->curl, CURLOPT_CONNECTTIMEOUT, watcher->cli->settings.connect_timeout);
#if LIBCURL_VERSION_NUM >= 0x071900
curl_easy_setopt(watcher->curl, CURLOPT_TCP_KEEPALIVE, 1L);
curl_easy_setopt(watcher->curl, CURLOPT_TCP_KEEPINTVL, 1L); /*the same as go-etcd*/
#endif
curl_easy_setopt(watcher->curl, CURLOPT_USERAGENT, "cetcd");
curl_easy_setopt(watcher->curl, CURLOPT_POSTREDIR, 3L); /*post after redirecting*/
curl_easy_setopt(watcher->curl, CURLOPT_VERBOSE, watcher->cli->settings.verbose);
curl_easy_setopt(watcher->curl, CURLOPT_CUSTOMREQUEST, "GET");
curl_easy_setopt(watcher->curl, CURLOPT_WRITEFUNCTION, cetcd_parse_response);
curl_easy_setopt(watcher->curl, CURLOPT_WRITEDATA, watcher->parser);
curl_easy_setopt(watcher->curl, CURLOPT_HEADER, 1L);
curl_easy_setopt(watcher->curl, CURLOPT_FOLLOWLOCATION, 1L);
/* We use an array to store watchers. It will cause holes when remove some watchers.
* watcher->array_index is used to reset to the original hole if the watcher was deleted before.
* */
if (watcher->array_index == -1) {
cetcd_array_append(watchers, watcher);
watcher->array_index = cetcd_array_size(watchers) - 1;
} else {
w = cetcd_array_get(watchers, watcher->array_index);
if (w) {
cetcd_watcher_release(w);
}
cetcd_array_set(watchers, watcher->array_index, watcher);
}
return 1;
}
int main(int argc, char *argv[]) {
cetcd_client cli;
cetcd_response *resp;
cetcd_array addrs;
cetcd_array_init(&addrs, 3);
cetcd_array_append(&addrs, "http://127.0.0.1:2379");
cetcd_client_init(&cli, &addrs);
resp = cetcd_get(&cli, "/radar/service");
if(resp->err) {
printf("error :%d, %s (%s)\n", resp->err->ecode, resp->err->message, resp->err->cause);
}
cetcd_response_print(resp);
cetcd_response_release(resp);
cetcd_array_destroy(&addrs);
cetcd_client_destroy(&cli);
return 0;
}
void cetcd_client_init(cetcd_client *cli, cetcd_array *addresses) {
size_t i;
cetcd_array *addrs;
curl_global_init(CURL_GLOBAL_ALL);
srand(time(0));
cli->keys_space = "v2/keys";
cli->stat_space = "v2/stat";
cli->member_space = "v2/members";
cli->curl = curl_easy_init();
addrs = cetcd_array_create(cetcd_array_size(addresses));
for (i=0; i<cetcd_array_size(addresses); ++i) {
cetcd_array_append(addrs, sdsnew(cetcd_array_get(addresses, i)));
}
cli->addresses = cetcd_array_shuffle(addrs);
cli->picked = rand() % (cetcd_array_size(cli->addresses));
cli->settings.verbose = 0;
cli->settings.connect_timeout = 1;
cli->settings.read_timeout = 1; /*not used now*/
cli->settings.write_timeout = 1; /*not used now*/
cetcd_array_init(&cli->watchers, 10);
/* Set CURLOPT_NOSIGNAL to 1 to work around the libcurl bug:
* http://stackoverflow.com/questions/9191668/error-longjmp-causes-uninitialized-stack-frame
* http://curl.haxx.se/mail/lib-2008-09/0197.html
* */
curl_easy_setopt(cli->curl, CURLOPT_NOSIGNAL, 1L);
#if LIBCURL_VERSION_NUM >= 0x071900
curl_easy_setopt(cli->curl, CURLOPT_TCP_KEEPALIVE, 1L);
curl_easy_setopt(cli->curl, CURLOPT_TCP_KEEPINTVL, 1L); /*the same as go-etcd*/
#endif
curl_easy_setopt(cli->curl, CURLOPT_USERAGENT, "cetcd");
curl_easy_setopt(cli->curl, CURLOPT_POSTREDIR, 3L); /*post after redirecting*/
}
