blob: f3c3f17c0db515ac426ce781b1c0025c27d23a3f (
plain) (
blame)
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
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "sblist.h"
#include <vespa/vespalib/util/random.h>
#include <vespa/log/log.h>
LOG_SETUP(".slobrok.list");
using LockGuard = std::lock_guard<std::mutex>;
namespace slobrok::api {
SlobrokList::SlobrokList()
: _lock(),
_slobrokSpecs(),
_nextSpec(0),
_currSpec(1),
_retryCount(0)
{
}
bool
SlobrokList::contains(const std::string &spec)
{
LockGuard guard(_lock);
if (_currSpec < _slobrokSpecs.size()) {
if (spec == _slobrokSpecs[_currSpec]) return true;
}
for (size_t i = 0; i < _slobrokSpecs.size(); ++i) {
if (spec == _slobrokSpecs[i]) {
_currSpec = i;
return true;
}
}
return false;
}
std::string
SlobrokList::nextSlobrokSpec()
{
LockGuard guard(_lock);
std::string v;
_currSpec = _nextSpec;
if (_nextSpec < _slobrokSpecs.size()) {
++_nextSpec;
v = _slobrokSpecs[_currSpec];
} else {
_nextSpec = 0;
++_retryCount;
}
return v;
}
std::string
SlobrokList::logString()
{
LockGuard guard(_lock);
if (_slobrokSpecs.size() == 0) {
return "[empty service location broker list]";
}
std::string v = "[";
for (size_t i = 0 ; i < _slobrokSpecs.size(); ++i) {
if (i > 0) v += ", ";
v += _slobrokSpecs[i];
}
v += "]";
return v;
}
void
SlobrokList::setup(const std::vector<std::string> &specList)
{
if (specList.size() == 0) return;
size_t cfgSz = specList.size();
LockGuard guard(_lock);
_slobrokSpecs.clear();
_nextSpec = 0;
_currSpec = cfgSz;
for (size_t i = 0; i < cfgSz; ++i) {
_slobrokSpecs.push_back(specList[i]);
}
vespalib::RandomGen randomizer(time(nullptr));
// randomize order
for (size_t i = 0; i + 1 < cfgSz; ++i) {
size_t lim = cfgSz - i;
size_t x = randomizer.nextUint32() % lim;
if (x != 0) {
std::swap(_slobrokSpecs[i], _slobrokSpecs[i+x]);
}
}
}
} // namespace slobrok::api
|
