1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/**
* @file lleventdispatcher.cpp
* @author Nat Goodspeed
* @date 2009-06-18
* @brief Implementation for lleventdispatcher.
*
* $LicenseInfo:firstyear=2009&license=viewergpl$
* Copyright (c) 2009, Linden Research, Inc.
* $/LicenseInfo$
*/
#if LL_WINDOWS
#pragma warning (disable : 4355) // 'this' used in initializer list: yes, intentionally
#endif
// Precompiled header
#include "linden_common.h"
// associated header
#include "lleventdispatcher.h"
// STL headers
// std headers
// external library headers
// other Linden headers
#include "llevents.h"
#include "llerror.h"
#include "llsdutil.h"
LLEventDispatcher::LLEventDispatcher(const std::string& desc, const std::string& key):
mDesc(desc),
mKey(key)
{
}
LLEventDispatcher::~LLEventDispatcher()
{
}
/// Register a callable by name
void LLEventDispatcher::add(const std::string& name, const Callable& callable, const LLSD& required)
{
mDispatch[name] = DispatchMap::mapped_type(callable, required);
}
void LLEventDispatcher::addFail(const std::string& name, const std::string& classname) const
{
LL_ERRS("LLEventDispatcher") << "LLEventDispatcher(" << mDesc << ")::add(" << name
<< "): " << classname << " is not a subclass "
<< "of LLEventDispatcher" << LL_ENDL;
}
/// Unregister a callable
bool LLEventDispatcher::remove(const std::string& name)
{
DispatchMap::iterator found = mDispatch.find(name);
if (found == mDispatch.end())
{
return false;
}
mDispatch.erase(found);
return true;
}
/// Call a registered callable with an explicitly-specified name. If no
/// such callable exists, die with LL_ERRS.
void LLEventDispatcher::operator()(const std::string& name, const LLSD& event) const
{
if (! attemptCall(name, event))
{
LL_ERRS("LLEventDispatcher") << "LLEventDispatcher(" << mDesc << "): '" << name
<< "' not found" << LL_ENDL;
}
}
/// Extract the @a key value from the incoming @a event, and call the
/// callable whose name is specified by that map @a key. If no such
/// callable exists, die with LL_ERRS.
void LLEventDispatcher::operator()(const LLSD& event) const
{
// This could/should be implemented in terms of the two-arg overload.
// However -- we can produce a more informative error message.
std::string name(event[mKey]);
if (! attemptCall(name, event))
{
LL_ERRS("LLEventDispatcher") << "LLEventDispatcher(" << mDesc << "): bad " << mKey
<< " value '" << name << "'" << LL_ENDL;
}
}
bool LLEventDispatcher::attemptCall(const std::string& name, const LLSD& event) const
{
DispatchMap::const_iterator found = mDispatch.find(name);
if (found == mDispatch.end())
{
// The reason we only return false, leaving it up to our caller to die
// with LL_ERRS, is that different callers have different amounts of
// available information.
return false;
}
// Found the name, so it's plausible to even attempt the call. But first,
// validate the syntax of the event itself.
std::string mismatch(llsd_matches(found->second.second, event));
if (! mismatch.empty())
{
LL_ERRS("LLEventDispatcher") << "LLEventDispatcher(" << mDesc << ") calling '" << name
<< "': bad request: " << mismatch << LL_ENDL;
}
// Event syntax looks good, go for it!
(found->second.first)(event);
return true; // tell caller we were able to call
}
LLEventDispatcher::Callable LLEventDispatcher::get(const std::string& name) const
{
DispatchMap::const_iterator found = mDispatch.find(name);
if (found == mDispatch.end())
{
return Callable();
}
return found->second.first;
}
LLDispatchListener::LLDispatchListener(const std::string& pumpname, const std::string& key):
LLEventDispatcher(pumpname, key),
mPump(pumpname, true), // allow tweaking for uniqueness
mBoundListener(mPump.listen("self", boost::bind(&LLDispatchListener::process, this, _1)))
{
}
bool LLDispatchListener::process(const LLSD& event)
{
(*this)(event);
return false;
}
|
