120 lines
3.7 KiB
C++
120 lines
3.7 KiB
C++
/**
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* @file lldispatcher.h
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* @brief LLDispatcher class header file.
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*
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* $LicenseInfo:firstyear=2004&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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#ifndef LL_LLDISPATCHER_H
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#define LL_LLDISPATCHER_H
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#include <map>
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#include <vector>
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#include <string>
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class LLDispatcher;
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class LLMessageSystem;
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class LLUUID;
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Class LLDispatchHandler
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//
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// Abstract base class for handling dispatches. Derive your own
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// classes, construct them, and add them to the dispatcher you want to
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// use.
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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class LLDispatchHandler
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{
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public:
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typedef std::vector<std::string> sparam_t;
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//typedef std::vector<S32> iparam_t;
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LLDispatchHandler() {}
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virtual ~LLDispatchHandler() {}
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virtual bool operator()(
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const LLDispatcher* dispatcher,
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const std::string& key,
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const LLUUID& invoice,
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const sparam_t& string) = 0;
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//const iparam_t& integers) = 0;
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};
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Class LLDispatcher
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//
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// Basic utility class that handles dispatching keyed operations to
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// function objects implemented as LLDispatchHandler derivations.
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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class LLDispatcher
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{
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public:
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typedef std::string key_t;
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typedef std::vector<std::string> keys_t;
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typedef std::vector<std::string> sparam_t;
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//typedef std::vector<S32> iparam_t;
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// construct a dispatcher.
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LLDispatcher();
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virtual ~LLDispatcher();
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// Returns if they keyed handler exists in this dispatcher.
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bool isHandlerPresent(const key_t& name) const;
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// copy all known keys onto keys_t structure
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void copyAllHandlerNames(keys_t& names) const;
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// Call this method with the name of the request that has come
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// in. If the handler is present, it is called with the params and
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// returns the return value from
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bool dispatch(
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const key_t& name,
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const LLUUID& invoice,
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const sparam_t& strings) const;
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//const iparam_t& itegers) const;
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// Add a handler. If one with the same key already exists, its
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// pointer is returned, otherwise returns NULL. This object does
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// not do memory management of the LLDispatchHandler, and relies
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// on the caller to delete the object if necessary.
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LLDispatchHandler* addHandler(const key_t& name, LLDispatchHandler* func);
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// Helper method to unpack the dispatcher message bus
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// format. Returns true on success.
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static bool unpackMessage(
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LLMessageSystem* msg,
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key_t& method,
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LLUUID& invoice,
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sparam_t& parameters);
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static bool unpackLargeMessage(
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LLMessageSystem* msg,
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key_t& method,
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LLUUID& invoice,
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sparam_t& parameters);
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protected:
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typedef std::map<key_t, LLDispatchHandler*> dispatch_map_t;
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dispatch_map_t mHandlers;
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};
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#endif // LL_LLDISPATCHER_H
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