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#include <uwsgi.h>
#include "client/dbclient.h"
extern struct uwsgi_server uwsgi;
extern struct uwsgi_instance *ui;
// one for each mongodb imperial monitor
struct uwsgi_emperor_mongodb_state {
char *address;
char *collection;
char *json;
char *database;
char *username;
char *password;
char *predigest;
};
extern "C" void uwsgi_imperial_monitor_mongodb(struct uwsgi_emperor_scanner *ues) {
struct uwsgi_emperor_mongodb_state *uems = (struct uwsgi_emperor_mongodb_state *) ues->data;
try {
// requested fields
mongo::BSONObj p = BSON( "name" << 1 << "config" << 1 << "ts" << 1 << "uid" << 1 << "gid" << 1 << "socket" << 1 );
mongo::BSONObj q = mongo::fromjson(uems->json);
std::unique_ptr<mongo::DBClientBase> conn;
conn = std::unique_ptr<mongo::DBClientBase> (new mongo::DBClientConnection(true, 0, uwsgi.socket_timeout));
dynamic_cast<mongo::DBClientConnection *>(conn.get())->connect(uems->address);
if (uems->database && uems->username && uems->password) {
std::string err;
if (conn->auth(uems->database, uems->username, uems->password, err, uems->predigest ? false : true) == false) {
uwsgi_log_verbose("[emperor-mongodb] unable to authenticate to db %s: %s\n", uems->database, err.c_str());
return;
}
}
// run the query
std::unique_ptr<mongo::DBClientCursor> cursor = conn->query(uems->collection, q, 0, 0, &p);
while(cursor.get() && cursor->more() ) {
mongo::BSONObj p = cursor->next();
// checking for an empty string is not required, but we reduce the load
// in case of badly strctured databases
const char *name = p.getStringField("name");
if (strlen(name) == 0) continue;
const char *config = p.getStringField("config");
if (strlen(config) == 0) config = NULL;
time_t vassal_ts = 0;
// ts must be a Date object !!!
mongo::BSONElement ts = p.getField("ts");
if (ts.type() == mongo::Date) {
vassal_ts = ts.date();
}
uid_t vassal_uid = 0;
gid_t vassal_gid = 0;
// check for tyrant mode
if (uwsgi.emperor_tyrant) {
int tmp_uid = p.getIntField("uid");
int tmp_gid = p.getIntField("gid");
if (tmp_uid < 0) tmp_uid = 0;
if (tmp_gid < 0) tmp_gid = 0;
vassal_uid = tmp_uid;
vassal_gid = tmp_gid;
}
const char *socket_name = p.getStringField("socket");
if (strlen(socket_name) == 0) socket_name = NULL;
uwsgi_emperor_simple_do(ues, (char *) name, (char *) config, vassal_ts/1000, vassal_uid, vassal_gid, (char *) socket_name);
}
// now check for removed instances
struct uwsgi_instance *c_ui = ui->ui_next;
while (c_ui) {
if (c_ui->scanner == ues) {
mongo::BSONObjBuilder b;
b.appendElements(q);
b.append("name", c_ui->name);
mongo::BSONObj q2 = b.obj();
cursor = conn->query(uems->collection, q2, 0, 0, &p);
if (!cursor.get()) return;
#ifdef UWSGI_DEBUG
uwsgi_log("JSON: %s\n", q2.toString().c_str());
#endif
if (!cursor->more()) {
emperor_stop(c_ui);
}
}
c_ui = c_ui->ui_next;
}
}
catch ( mongo::DBException &e ) {
uwsgi_log("[emperor-mongodb] ERROR(%s/%s): %s\n", uems->address, uems->collection, e.what());
}
}
// setup a new mongodb imperial monitor
extern "C" void uwsgi_imperial_monitor_mongodb_init(struct uwsgi_emperor_scanner *ues) {
// allocate a new state
ues->data = uwsgi_calloc(sizeof(struct uwsgi_emperor_mongodb_state));
size_t arg_len = strlen(ues->arg);
struct uwsgi_emperor_mongodb_state *uems = (struct uwsgi_emperor_mongodb_state *) ues->data;
// parse args/ set defaults
uems->address = (char *) "127.0.0.1:27017";
uems->collection = (char *) "uwsgi.emperor.vassals";
uems->json = (char *) "";
if (arg_len > 10) {
uems->address = uwsgi_str(ues->arg+10);
char *comma = strchr(uems->address, ',');
if (!comma) goto done;
*comma = 0;
uems->collection = comma+1;
comma = strchr(uems->collection, ',');
if (!comma) goto done;
*comma = 0;
uems->json = comma+1;
}
done:
uwsgi_log("[emperor] enabled emperor MongoDB monitor for %s on collection %s\n", uems->address, uems->collection);
}
// setup a new mongodb imperial monitor (keyval based)
extern "C" void uwsgi_imperial_monitor_mongodb_init2(struct uwsgi_emperor_scanner *ues) {
// allocate a new state
ues->data = uwsgi_calloc(sizeof(struct uwsgi_emperor_mongodb_state));
size_t arg_len = strlen(ues->arg);
struct uwsgi_emperor_mongodb_state *uems = (struct uwsgi_emperor_mongodb_state *) ues->data;
// parse args/ set defaults
uems->address = (char *) "127.0.0.1:27017";
uems->collection = (char *) "uwsgi.emperor.vassals";
uems->json = (char *) "";
char *args = NULL;
if (arg_len <= 11) goto done;
args = ues->arg+11;
if (uwsgi_kvlist_parse(args, strlen(args), ',', '=',
"addr", &uems->address,
"address", &uems->address,
"server", &uems->address,
"collection", &uems->collection,
"coll", &uems->collection,
"json", &uems->json,
"database", &uems->database,
"db", &uems->database,
"username", &uems->username,
"password", &uems->password,
"predigest", &uems->predigest,
NULL)) {
uwsgi_log("[emperor-mongodb] invalid keyval syntax !\n");
exit(1);
}
done:
uwsgi_log("[emperor] enabled emperor MongoDB monitor for %s on collection %s\n", uems->address, uems->collection);
}
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