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/**
* @file lldispatcher.h
* @brief LLDispatcher class header file.
*
* $LicenseInfo:firstyear=2004&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, 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_LLDISPATCHER_H
#define LL_LLDISPATCHER_H
#include <map>
#include <vector>
#include <string>
class LLDispatcher;
class LLMessageSystem;
class LLUUID;
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Class LLDispatchHandler
//
// Abstract base class for handling dispatches. Derive your own
// classes, construct them, and add them to the dispatcher you want to
// use.
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class LLDispatchHandler
{
public:
typedef std::vector<std::string> sparam_t;
//typedef std::vector<S32> iparam_t;
LLDispatchHandler() {}
virtual ~LLDispatchHandler() {}
virtual bool operator()(
const LLDispatcher* dispatcher,
const std::string& key,
const LLUUID& invoice,
const sparam_t& string) = 0;
//const iparam_t& integers) = 0;
};
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Class LLDispatcher
//
// Basic utility class that handles dispatching keyed operations to
// function objects implemented as LLDispatchHandler derivations.
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class LLDispatcher
{
public:
typedef std::string key_t;
typedef std::vector<std::string> keys_t;
typedef std::vector<std::string> sparam_t;
//typedef std::vector<S32> iparam_t;
// construct a dispatcher.
LLDispatcher();
virtual ~LLDispatcher();
// Returns if they keyed handler exists in this dispatcher.
bool isHandlerPresent(const key_t& name) const;
// copy all known keys onto keys_t structure
void copyAllHandlerNames(keys_t& names) const;
// Call this method with the name of the request that has come
// in. If the handler is present, it is called with the params and
// returns the return value from
bool dispatch(
const key_t& name,
const LLUUID& invoice,
const sparam_t& strings) const;
//const iparam_t& itegers) const;
// Add a handler. If one with the same key already exists, its
// pointer is returned, otherwise returns NULL. This object does
// not do memory management of the LLDispatchHandler, and relies
// on the caller to delete the object if necessary.
LLDispatchHandler* addHandler(const key_t& name, LLDispatchHandler* func);
// Helper method to unpack the dispatcher message bus
// format. Returns true on success.
static bool unpackMessage(
LLMessageSystem* msg,
key_t& method,
LLUUID& invoice,
sparam_t& parameters);
protected:
typedef std::map<key_t, LLDispatchHandler*> dispatch_map_t;
dispatch_map_t mHandlers;
};
#endif // LL_LLDISPATCHER_H
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