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authorsfan5 <sfan5@live.de>2016-12-29 13:17:24 +0100
committerNer'zhul <nerzhul@users.noreply.github.com>2016-12-29 13:17:24 +0100
commite509ead680cc1c0bde35dfd467d18b8288cc1b86 (patch)
treee3df3b98a7424a32638ae63ee8d90a65502eb463 /po/ko
parent094a5a73d3b9817d07c52754749f0828c4005b8c (diff)
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Buildbot: Update Gettext version (#4971)
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/*
Minetest
Copyright (C) 2014 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "config.h"

#if USE_REDIS

#include "database-redis.h"

#include "settings.h"
#include "log.h"
#include "exceptions.h"
#include "util/string.h"

#include <hiredis.h>
#include <cassert>


Database_Redis::Database_Redis(Settings &conf)
{
	std::string tmp;
	try {
		tmp = conf.get("redis_address");
		hash = conf.get("redis_hash");
	} catch (SettingNotFoundException) {
		throw SettingNotFoundException("Set redis_address and "
			"redis_hash in world.mt to use the redis backend");
	}
	const char *addr = tmp.c_str();
	int port = conf.exists("redis_port") ? conf.getU16("redis_port") : 6379;
	ctx = redisConnect(addr, port);
	if (!ctx) {
		throw FileNotGoodException("Cannot allocate redis context");
	} else if (ctx->err) {
		std::string err = std::string("Connection error: ") + ctx->errstr;
		redisFree(ctx);
		throw FileNotGoodException(err);
	}
}

Database_Redis::~Database_Redis()
{
	redisFree(ctx);
}

void Database_Redis::beginSave() {
	redisReply *reply = static_cast<redisReply *>(redisCommand(ctx, "MULTI"));
	if (!reply) {
		throw FileNotGoodException(std::string(
			"Redis command 'MULTI' failed: ") + ctx->errstr);
	}
	freeReplyObject(reply);
}

void Database_Redis::endSave() {
	redisReply *reply = static_cast<redisReply *>(redisCommand(ctx, "EXEC"));
	if (!reply) {
		throw FileNotGoodException(std::string(
			"Redis command 'EXEC' failed: ") + ctx->errstr);
	}
	freeReplyObject(reply);
}

bool Database_Redis::saveBlock(const v3s16 &pos, const std::string &data)
{
	std::string tmp = i64tos(getBlockAsInteger(pos));

	redisReply *reply = static_cast<redisReply *>(redisCommand(ctx, "HSET %s %s %b",
			hash.c_str(), tmp.c_str(), data.c_str(), data.size()));
	if (!reply) {
		errorstream << "WARNING: saveBlock: redis command 'HSET' failed on "
			"block " << PP(pos) << ": " << ctx->errstr << std::endl;
		freeReplyObject(reply);
		return false;
	}

	if (reply->type == REDIS_REPLY_ERROR) {
		errorstream << "WARNING: saveBlock: saving block " << PP(pos)
			<< " failed: " << reply->str << std::endl;
		freeReplyObject(reply);
		return false;
	}

	freeReplyObject(reply);
	return true;
}

std::string Database_Redis::loadBlock(const v3s16 &pos)
{
	std::string tmp = i64tos(getBlockAsInteger(pos));
	redisReply *reply = static_cast<redisReply *>(redisCommand(ctx,
			"HGET %s %s", hash.c_str(), tmp.c_str()));

	if (!reply) {
		throw FileNotGoodException(std::string(
			"Redis command 'HGET %s %s' failed: ") + ctx->errstr);
	}
	switch (reply->type) {
	case REDIS_REPLY_STRING: {
		std::string str(reply->str, reply->len);
		// std::string copies the memory so this won't cause any problems
		freeReplyObject(reply);
		return str;
	}
	case REDIS_REPLY_ERROR:
		errorstream << "WARNING: loadBlock: loading block " << PP(pos)
			<< " failed: " << reply->str << std::endl;
	}
	freeReplyObject(reply);
	return "";
}