本文整理汇总了C++中GridFS类的典型用法代码示例。如果您正苦于以下问题：C++ GridFS类的具体用法？C++ GridFS怎么用？C++ GridFS使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了GridFS类的8个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: gridfs_list
/*
* cursor,err = gridfs:list([lua_table or json_str])
*/
static int gridfs_list(lua_State *L) {
GridFS *gridfs = userdata_to_gridfs(L, 1);
BSONObj query;
int type = lua_type(L, 2);
if (type == LUA_TSTRING) {
const char *jsonstr = luaL_checkstring(L, 2);
query = fromjson(jsonstr);
} else if (type == LUA_TTABLE) {
lua_to_bson(L, 2, query);
}
std::auto_ptr<DBClientCursor> autocursor = gridfs->list(query);
if (!autocursor.get()){
lua_pushnil(L);
lua_pushstring(L, LUAMONGO_ERR_CONNECTION_LOST);
return 2;
}
DBClientCursor **cursor = (DBClientCursor **)lua_newuserdata(L, sizeof(DBClientCursor *));
*cursor = autocursor.get();
autocursor.release();
luaL_getmetatable(L, LUAMONGO_CURSOR);
lua_setmetatable(L, -2);
return 1;
}示例2: gridfs_find_file
/*
* gridfile, err = gridfs:find_file(query)
*/
static int gridfs_find_file(lua_State *L) {
GridFS *gridfs = userdata_to_gridfs(L, 1);
int resultcount = 1;
if (!lua_isnoneornil(L, 2)) {
try {
int type = lua_type(L, 2);
if (type == LUA_TTABLE) {
BSONObj obj;
lua_to_bson(L, 2, obj);
GridFile gridfile = gridfs->findFile(obj);
resultcount = gridfile_create(L, gridfile);
} else {
GridFile gridfile = gridfs->findFile(luaL_checkstring(L, 2));
resultcount = gridfile_create(L, gridfile);
}
} catch (std::exception &e) {
lua_pushnil(L);
lua_pushfstring(L, LUAMONGO_ERR_CALLING, LUAMONGO_GRIDFS, "find_file", e.what());
resultcount = 2;
}
}
return resultcount;
}示例3: gridfs_remove_file
/*
* ok, err = gridfs:remove_file(filename)
*/
static int gridfs_remove_file(lua_State *L) {
int resultcount = 1;
GridFS *gridfs = userdata_to_gridfs(L, 1);
const char *filename = luaL_checkstring(L, 2);
try {
gridfs->removeFile(filename);
lua_pushboolean(L, 1);
} catch (std::exception &e) {
lua_pushboolean(L, 0);
lua_pushfstring(L, LUAMONGO_ERR_CALLING, LUAMONGO_GRIDFS, "remove_file", e.what());
resultcount = 2;
}
return resultcount;
}示例4: gridfs_find_file_by_name
/*
* gridfile, err = gridfs:find_file_by_name(filename)
*/
static int gridfs_find_file_by_name(lua_State *L) {
GridFS *gridfs = userdata_to_gridfs(L, 1);
int resultcount = 1;
if (!lua_isnoneornil(L, 2)) {
try {
GridFile gridfile = gridfs->findFileByName(luaL_checkstring(L, 2));
resultcount = gridfile_create(L, gridfile);
} catch (std::exception &e) {
lua_pushnil(L);
lua_pushfstring(L, LUAMONGO_ERR_CALLING, LUAMONGO_GRIDFS, "find_file_by_name", e.what());
resultcount = 2;
}
}
return resultcount;
}示例5: gridfs_store_file
/*
* bson, err = gridfs:store_file(filename[, remote_file[, content_type]])
*/
static int gridfs_store_file(lua_State *L) {
int resultcount = 1;
GridFS *gridfs = userdata_to_gridfs(L, 1);
const char *filename = luaL_checkstring(L, 2);
const char *remote = luaL_optstring(L, 3, "");
const char *content_type = luaL_optstring(L, 4, "");
try {
BSONObj res = gridfs->storeFile(filename, remote, content_type);
bson_to_lua(L, res);
} catch (std::exception &e) {
lua_pushnil(L);
lua_pushfstring(L, LUAMONGO_ERR_CALLING, LUAMONGO_GRIDFS, "store_file", e.what());
resultcount = 2;
}
return resultcount;
}示例6: gridfs_list
/*
* cursor,err = gridfs:list()
*/
static int gridfs_list(lua_State *L) {
GridFS *gridfs = userdata_to_gridfs(L, 1);
std::auto_ptr<DBClientCursor> autocursor = gridfs->list();
if (!autocursor.get()) {
lua_pushnil(L);
lua_pushstring(L, LUAMONGO_ERR_CONNECTION_LOST);
return 2;
}
DBClientCursor **cursor = (DBClientCursor **)lua_newuserdata(L, sizeof(DBClientCursor *));
*cursor = autocursor.get();
autocursor.release();
luaL_getmetatable(L, LUAMONGO_CURSOR);
lua_setmetatable(L, -2);
return 1;
}示例7: main
int main() {
try {
DBClientBase *conn = NULL;
string err_msg;
ConnectionString cs = ConnectionString::parse("localhost", err_msg);
if (!cs.isValid()) {
throw "bad: " + err_msg;
}
try {
conn = cs.connect(err_msg);
} catch (DBException &e) {
cout << "caught " << err_msg << endl;
return 1;
}
if (!conn){
cout<<"Unable to connect to DB"<<endl;
return 1;
}
// BSONObjBuilder b;
// b.append("name", "Joe");
// b.append("age", 33);
// BSONObj p = b.obj();
//
// conn->insert("db.coll",p,0);
GridFS * fs;
fs = new GridFS(*conn,"test");
BSONObj p = fs->storeFile("pic.JPG");
conn->insert("db.coll",p,0);
}
catch( DBException &e ) {
cout << "caught " << e.what() << endl;
}
return 0;
}示例8: main
int
main(int argc, char **argv)
{
ArgumentParser argp(argc, argv, "ho:fd:c:");
if (argp.has_arg("h")) {
print_usage(argv[0]);
exit(0);
}
const std::vector<const char *> &items = argp.items();
std::string output_dir = "tmp/";
std::string database = "fflog";
std::string collection;
std::string query_coll;
bool filename_indexed = ! argp.has_arg("f");
std::vector<std::pair<long long, long long> > times;
if (argp.has_arg("o")) {
output_dir = argp.arg("o");
if (output_dir[output_dir.length() - 1] != '/') {
output_dir += "/";
}
}
if (argp.has_arg("d")) {
database = argp.arg("d");
}
if (argp.has_arg("c")) {
collection = argp.arg("c");
} else {
print_usage(argv[0]);
printf("No collection given\n");
exit(-1);
}
query_coll = database + "." + collection;
if (items.empty()) {
times.push_back(std::make_pair(0L, std::numeric_limits<long long>::max()));
} else {
for (unsigned int i = 0; i < items.size(); ++i) {
std::string item = items[i];
std::string::size_type dotpos = item.find("..");
if (dotpos == std::string::npos) {
// singular timestamp
long int ts = argp.parse_item_int(i);
times.push_back(std::make_pair(ts, ts));
} else {
// range
std::string first_ts, second_ts;
first_ts = item.substr(0, dotpos);
second_ts = item.substr(dotpos + 2);
times.push_back(std::make_pair(StringConversions::to_long(first_ts),
StringConversions::to_long(second_ts)));
}
}
}
unsigned int image_n = 0;
DBClientConnection *mongodb_client =
new DBClientConnection(/* auto reconnect */ true);
std::string errmsg;
mongodb_client->connect("localhost", errmsg);
GridFS *gridfs = new GridFS(*mongodb_client, "fflog");
for (unsigned int i = 0; i < times.size(); ++i) {
Query q;
if (times[i].first == times[i].second) {
printf("Querying for timestamp %lli\n", times[i].first);
q = QUERY("timestamp" << times[i].first).sort("timestamp", 1);
} else {
printf("Querying for range %lli..%lli\n", times[i].first, times[i].second);
q = QUERY("timestamp"
<< mongo::GTE << times[i].first
<< mongo::LTE << times[i].second)
.sort("timestamp", 1);
}
#if __cplusplus >= 201103L
std::unique_ptr<mongo::DBClientCursor> cursor =
mongodb_client->query(query_coll, q);
#else
std::auto_ptr<mongo::DBClientCursor> cursor =
mongodb_client->query(query_coll, q);
#endif
while (cursor->more()) {
BSONObj doc = cursor->next();
BSONObj imgdoc = doc.getObjectField("image");
if (imgdoc["colorspace"].String() == "RGB") {
std::string filename = imgdoc.getFieldDotted("data.filename").String();
long filesize = imgdoc.getFieldDotted("data.length").numberLong();
std::string image_id = imgdoc["image_id"].String();
//.........这里部分代码省略.........