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/**
* @file llexperiencecache.h
* @brief Caches information relating to experience keys
*
* $LicenseInfo:firstyear=2012&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2012, Linden Research, Inc.
*
* This library 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;
* version 2.1 of the License only.
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LL_LLEXPERIENCECACHE_H
#define LL_LLEXPERIENCECACHE_H
#include "linden_common.h"
#include "llsingleton.h"
#include "llframetimer.h"
#include "llsd.h"
#include "llcorehttputil.h"
#include <boost/signals2.hpp>
#include <boost/function.hpp>
class LLSD;
class LLUUID;
class LLExperienceCache: public LLSingleton < LLExperienceCache >
{
friend class LLSingleton < LLExperienceCache > ;
public:
typedef boost::function<std::string(const std::string &)> CapabilityQuery_t;
typedef boost::function<void(const LLSD &)> Callback_t;
void cleanup();
void erase(const LLUUID& key);
bool fetch(const LLUUID& key, bool refresh = false);
void insert(const LLSD& experience_data);
const LLSD& get(const LLUUID& key);
// If name information is in cache, callback will be called immediately.
void get(const LLUUID& key, Callback_t slot);
bool isRequestPending(const LLUUID& public_key);
void setCapabilityQuery(CapabilityQuery_t queryfn);
static const std::string NAME; // "name"
static const std::string EXPERIENCE_ID; // "public_id"
static const std::string AGENT_ID; // "agent_id"
static const std::string GROUP_ID; // "group_id"
static const std::string PROPERTIES; // "properties"
static const std::string EXPIRES; // "expiration"
static const std::string DESCRIPTION; // "description"
static const std::string QUOTA; // "quota"
static const std::string MATURITY; // "maturity"
static const std::string METADATA; // "extended_metadata"
static const std::string SLURL; // "slurl"
static const std::string MISSING; // "DoesNotExist"
// should be in sync with experience-api/experiences/models.py
static const int PROPERTY_INVALID; // 1 << 0
static const int PROPERTY_PRIVILEGED; // 1 << 3
static const int PROPERTY_GRID; // 1 << 4
static const int PROPERTY_PRIVATE; // 1 << 5
static const int PROPERTY_DISABLED; // 1 << 6
static const int PROPERTY_SUSPENDED; // 1 << 7
private:
LLExperienceCache();
virtual ~LLExperienceCache();
virtual void initSingleton();
// Callback types for get()
typedef boost::signals2::signal < void(const LLSD &) > callback_signal_t;
typedef boost::shared_ptr<callback_signal_t> signal_ptr;
// May have multiple callbacks for a single ID, which are
// represented as multiple slots bound to the signal.
// Avoid copying signals via pointers.
typedef std::map<LLUUID, signal_ptr> signal_map_t;
typedef std::map<LLUUID, LLSD> cache_t;
typedef std::set<LLUUID> RequestQueue_t;
typedef std::map<LLUUID, F64> PendingQueue_t;
//--------------------------------------------
static const std::string PRIVATE_KEY; // "private_id"
// default values
static const F64 DEFAULT_EXPIRATION; // 600.0
static const S32 DEFAULT_QUOTA; // 128 this is megabytes
//--------------------------------------------
void processExperience(const LLUUID& public_key, const LLSD& experience);
//--------------------------------------------
cache_t mCache;
signal_map_t mSignalMap;
RequestQueue_t mRequestQueue;
PendingQueue_t mPendingQueue;
LLFrameTimer mRequestTimer;
LLFrameTimer mEraseExpiredTimer; // Periodically clean out expired entries from the cache
CapabilityQuery_t mCapability;
std::string mCacheFileName;
bool mShutdown;
void idleCoro();
void eraseExpired();
void requestExperiencesCoro(LLCoreHttpUtil::HttpCoroutineAdapter::ptr_t &, std::string, RequestQueue_t);
void requestExperiences();
void setMaximumLookups(int maximumLookups);
void bootstrap(const LLSD& legacyKeys, int initialExpiration);
void exportFile(std::ostream& ostr) const;
void importFile(std::istream& istr);
//
const cache_t& getCached();
// maps an experience private key to the experience id
LLUUID getExperienceId(const LLUUID& private_key, bool null_if_not_found=false);
//=====================================================================
inline friend std::ostream &operator << (std::ostream &os, const LLExperienceCache &cache)
{
cache.exportFile(os);
return os;
}
inline friend std::istream &operator >> (std::istream &is, LLExperienceCache &cache)
{
cache.importFile(is);
return is;
}
};
#endif // LL_LLEXPERIENCECACHE_H
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