mirror of
https://github.com/minetest/minetestmapper.git
synced 2024-11-25 17:03:47 +01:00
113 lines
2.8 KiB
C++
113 lines
2.8 KiB
C++
#include <stdexcept>
|
|
#include <sstream>
|
|
#include <fstream>
|
|
#include "db-redis.h"
|
|
#include "types.h"
|
|
#include "util.h"
|
|
|
|
static inline int64_t stoi64(const std::string &s)
|
|
{
|
|
std::stringstream tmp(s);
|
|
int64_t t;
|
|
tmp >> t;
|
|
return t;
|
|
}
|
|
|
|
|
|
static inline std::string i64tos(int64_t i)
|
|
{
|
|
std::ostringstream os;
|
|
os << i;
|
|
return os.str();
|
|
}
|
|
|
|
std::string get_setting_default(std::string name, std::istream &is, const std::string def)
|
|
{
|
|
try {
|
|
return get_setting(name, is);
|
|
} catch(std::runtime_error e) {
|
|
return def;
|
|
}
|
|
}
|
|
|
|
DBRedis::DBRedis(const std::string &mapdir)
|
|
{
|
|
std::ifstream ifs((mapdir + "/world.mt").c_str());
|
|
if(!ifs.good())
|
|
throw std::runtime_error("Failed to read world.mt");
|
|
std::string tmp;
|
|
try {
|
|
tmp = get_setting("redis_address", ifs);
|
|
ifs.seekg(0);
|
|
hash = get_setting("redis_hash", ifs);
|
|
ifs.seekg(0);
|
|
} catch(std::runtime_error e) {
|
|
throw std::runtime_error("Set redis_address and redis_hash in world.mt to use the redis backend");
|
|
}
|
|
const char *addr = tmp.c_str();
|
|
int port = stoi64(get_setting_default("redis_port", ifs, "6379"));
|
|
ctx = redisConnect(addr, port);
|
|
if(!ctx)
|
|
throw std::runtime_error("Cannot allocate redis context");
|
|
else if(ctx->err) {
|
|
std::string err = std::string("Connection error: ") + ctx->errstr;
|
|
redisFree(ctx);
|
|
throw std::runtime_error(err);
|
|
}
|
|
|
|
loadPosCache();
|
|
}
|
|
|
|
|
|
DBRedis::~DBRedis()
|
|
{
|
|
redisFree(ctx);
|
|
}
|
|
|
|
|
|
std::vector<BlockPos> DBRedis::getBlockPos()
|
|
{
|
|
return posCache;
|
|
}
|
|
|
|
|
|
void DBRedis::loadPosCache()
|
|
{
|
|
redisReply *reply;
|
|
reply = (redisReply*) redisCommand(ctx, "HKEYS %s", hash.c_str());
|
|
if(!reply)
|
|
throw std::runtime_error(std::string("redis command 'HKEYS %s' failed: ") + ctx->errstr);
|
|
if(reply->type != REDIS_REPLY_ARRAY)
|
|
throw std::runtime_error("Failed to get keys from database");
|
|
for(size_t i = 0; i < reply->elements; i++) {
|
|
if(reply->element[i]->type != REDIS_REPLY_STRING)
|
|
throw std::runtime_error("Got wrong response to 'HKEYS %s' command");
|
|
posCache.push_back(decodeBlockPos(stoi64(reply->element[i]->str)));
|
|
}
|
|
|
|
freeReplyObject(reply);
|
|
}
|
|
|
|
|
|
void DBRedis::getBlocksOnZ(std::map<int16_t, BlockList> &blocks, int16_t zPos)
|
|
{
|
|
redisReply *reply;
|
|
std::string tmp;
|
|
|
|
for (std::vector<BlockPos>::iterator it = posCache.begin(); it != posCache.end(); ++it) {
|
|
if (it->z != zPos) {
|
|
continue;
|
|
}
|
|
tmp = i64tos(encodeBlockPos(*it));
|
|
reply = (redisReply*) redisCommand(ctx, "HGET %s %s", hash.c_str(), tmp.c_str());
|
|
if(!reply)
|
|
throw std::runtime_error(std::string("redis command 'HGET %s %s' failed: ") + ctx->errstr);
|
|
if (reply->type == REDIS_REPLY_STRING && reply->len != 0) {
|
|
Block b(*it, ustring((const unsigned char *) reply->str, reply->len));
|
|
blocks[b.first.x].push_back(b);
|
|
} else
|
|
throw std::runtime_error("Got wrong response to 'HGET %s %s' command");
|
|
freeReplyObject(reply);
|
|
}
|
|
}
|