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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
// Copyright (C) 2011 Internet Systems Consortium, Inc. ("ISC")
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.
#ifndef __COUNTER_DICT_H
#define __COUNTER_DICT_H 1
#include <string>
#include <vector>
#include <utility>
#include <boost/noncopyable.hpp>
#include <boost/scoped_ptr.hpp>
#include <boost/iterator/iterator_facade.hpp>
#include <exceptions/exceptions.h>
#include <statistics/counter.h>
namespace isc {
namespace statistics {
class CounterDictionaryImpl;
class CounterDictionaryConstIteratorImpl;
class CounterDictionary : boost::noncopyable {
private:
boost::scoped_ptr<CounterDictionaryImpl> impl_;
// Default constructor is forbidden; number of counter items must be
// specified at the construction of this class.
CounterDictionary();
public:
/// The constructor.
/// This constructor is mostly exception free. But it may still throw
/// a standard exception if memory allocation fails inside the method.
///
/// \param items A number of counter items to hold (greater than 0)
///
/// \throw isc::InvalidParameter \a items is 0
CounterDictionary(const size_t items);
/// The destructor.
///
/// This method never throws an exception.
~CounterDictionary();
/// \brief Add an element
///
/// \throw isc::InvalidParameter \a element already exists.
///
/// \param name A name of the element to append
void addElement(const std::string& name);
/// \brief Delete
///
/// \throw isc::OutOfRange \a element does not exist.
///
/// \param name A name of the element to delete
void deleteElement(const std::string& name);
/// \brief Lookup
///
/// \throw isc::OutOfRange \a element does not exist.
///
/// \param name A name of the element to get the counters
Counter& getElement(const std::string &name) const;
/// Same as getElement()
Counter& operator[](const std::string &name) const;
/// \brief \c ConstIterator is a constant iterator that provides an
/// interface for enumerating name of zones stored in CounterDictionary.
///
/// This class is derived from boost::iterator_facade and uses pImpl
/// idiom not to expose implementation detail of
/// CounterDictionary::iterator.
///
/// It is intended to walk through the elements when sending the
/// counters to statistics module.
class ConstIterator :
public boost::iterator_facade<ConstIterator,
const std::string,
boost::forward_traversal_tag>
{
private:
boost::scoped_ptr<CounterDictionaryConstIteratorImpl> impl_;
public:
/// The constructor.
///
/// This constructor is mostly exception free. But it may still
/// throw a standard exception if memory allocation fails
/// inside the method.
ConstIterator();
/// The destructor.
///
/// This method never throws an exception.
~ConstIterator();
/// The assignment operator.
///
/// This method is mostly exception free. But it may still
/// throw a standard exception if memory allocation fails
/// inside the method.
ConstIterator& operator=(const ConstIterator &source);
/// The copy constructor.
///
/// This constructor is mostly exception free. But it may still
/// throw a standard exception if memory allocation fails
/// inside the method.
ConstIterator(const ConstIterator& source);
/// The constructor from implementation detail.
///
/// This method is used to create an instance of ConstIterator
/// by CounterDict::begin() and CounterDict::end().
///
/// This constructor is mostly exception free. But it may still
/// throw a standard exception if memory allocation fails
/// inside the method.
ConstIterator(
const CounterDictionaryConstIteratorImpl& source);
private:
/// \brief An internal method to increment this iterator.
void increment();
/// \brief An internal method to check equality.
bool equal(const ConstIterator& other) const;
/// \brief An internal method to dereference this iterator.
const value_type& dereference() const;
private:
friend class boost::iterator_core_access;
};
typedef ConstIterator const_iterator;
/// \brief Return an iterator corresponding to the beginning of the
/// elements stored in CounterDictionary.
///
/// This method is mostly exception free. But it may still throw a
/// standard exception if memory allocation fails inside the method.
const_iterator begin() const;
/// \brief Return an iterator corresponding to the end of the elements
/// stored in CounterDictionary.
///
/// This method is mostly exception free. But it may still throw a
/// standard exception if memory allocation fails inside the method.
const_iterator end() const;
};
} // namespace statistics
} // namespace isc
#endif
|
