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/**
* @file llleaplistener.h
* @author Nat Goodspeed
* @date 2012-03-16
* @brief LLEventAPI supporting LEAP plugins
*
* $LicenseInfo:firstyear=2012&license=viewerlgpl$
* Copyright (c) 2012, Linden Research, Inc.
* $/LicenseInfo$
*/
#if ! defined(LL_LLLEAPLISTENER_H)
#define LL_LLLEAPLISTENER_H
#include "lleventapi.h"
#include <map>
#include <string>
#include <boost/function.hpp>
#include <boost/ptr_container/ptr_map.hpp>
/// Listener class implementing LLLeap query/control operations.
/// See https://jira.lindenlab.com/jira/browse/DEV-31978.
class LLLeapListener: public LLEventAPI
{
public:
/**
* Decouple LLLeap by dependency injection. Certain LLLeapListener
* operations must be able to cause LLLeap to listen on a specified
* LLEventPump with the LLLeap listener that wraps incoming events in an
* outer (pump=, data=) map and forwards them to the plugin. Very well,
* define the signature for a function that will perform that, and make
* our constructor accept such a function.
*/
typedef boost::function<LLBoundListener(LLEventPump&, const std::string& listener)>
ConnectFunc;
LLLeapListener(const ConnectFunc& connect);
~LLLeapListener();
static LLSD getFeatures();
private:
void newpump(const LLSD&);
void killpump(const LLSD&);
void listen(const LLSD&);
void stoplistening(const LLSD&);
void ping(const LLSD&) const;
void getAPIs(const LLSD&) const;
void getAPI(const LLSD&) const;
void getFeatures(const LLSD&) const;
void getFeature(const LLSD&) const;
void saveListener(const std::string& pump_name, const std::string& listener_name,
const LLBoundListener& listener);
ConnectFunc mConnect;
// In theory, listen() could simply call the relevant LLEventPump's
// listen() method, stoplistening() likewise. Lifespan issues make us
// capture the LLBoundListener objects: when this object goes away, all
// those listeners should be disconnected. But what if the client listens,
// stops, listens again on the same LLEventPump with the same listener
// name? Merely collecting LLBoundListeners wouldn't adequately track
// that. So capture the latest LLBoundListener for this LLEventPump name
// and listener name.
typedef std::map<std::pair<std::string, std::string>, LLBoundListener> ListenersMap;
ListenersMap mListeners;
// Similar lifespan reasoning applies to LLEventPumps instantiated by
// newpump() operations.
typedef boost::ptr_map<std::string, LLEventPump> EventPumpsMap;
EventPumpsMap mEventPumps;
};
#endif /* ! defined(LL_LLLEAPLISTENER_H) */
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