-
Notifications
You must be signed in to change notification settings - Fork 0
/
Storage.php
123 lines (117 loc) · 4.11 KB
/
Storage.php
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
<?php
require_once __DIR__.'/vendor/autoload.php';
/**
* Storage (influxDB) wrapper
*/
class Storage
{
private $client = null;
private $database = null;
/**
* Initialize a InfluxDB wrapper
*/
public function __construct()
{
$this->logger = Logger::getLogger('Storage');
}
/**
* Connect to InfluxDB database, create it if not existing
*
* @param string $host InfluxDB server hostname (exemple: 'localhost')
* @param string $port InfluxDB server listening port (exemple: '8086')
* @param string $database InfluxDB database used (exemple: 'netatmo')
* @param string $retentionDuration InfluxDB database retention policy duration (exemple: '1825d')
* @return void
*/
public function connect($host, $port, $database, $retentionDuration)
{
$this->logger->debug("Connecting to database $database (http://$host:$port)");
try {
$this->client = new InfluxDB\Client($host, $port);
$this->logger->trace('InfluxDB client created');
$this->database = $this->client->selectDB($database);
$this->logger->trace('Database selected');
} catch (Exception $e) {
$this->logger->error('Can not access database');
$this->logger->debug($e->getMessage());
throw new Exception($e, 1);
}
try {
$this->logger->trace('Check database exists');
if (!$this->database->exists()) {
$this->logger->trace('Database does not exist');
$this->database->create();
$this->database->alterRetentionPolicy(new InfluxDB\Database\RetentionPolicy('autogen', $retentionDuration, 1, true));
$this->logger->info('Database created successfully with retention duration: ' . $retentionDuration);
}
} catch (Exception $e) {
$this->logger->error('Can not create database');
$this->logger->debug($e->getMessage());
}
return;
}
/**
* Get timestamp of last fetched value for specific measurement and field
*
* @param string $measurement Measurement to be retrieved
* @param string $field Fieldname to use
* @return int timestamp
*/
public function get_last_fetch_date($measurement, $field)
{
$this->logger->debug("Get last fetch date for $measurement (on field $field)");
$last = null;
try {
// Request last data
$result = $this->database->query("SELECT last($field) FROM \"$measurement\"");
$points = $result->getPoints();
if (count($points)) {
$last = strtotime($points[0]['time']);
}
} catch (Exception $e) {
$this->logger->error('Can not access database');
$this->logger->debug($e->getMessage());
throw new Exception($e, 1);
}
$this->logger->debug("Last data was fetched $last");
return $last;
}
/**
* Prepare InfluxDB point before insertion
*
* @param string $measurement
* @param int $timestamp
* @param float $value Main value
* @param array $tags Optionnal tags
* @param array $values Optionnal keys/values
* @return InfluxDB\Point
*/
public function createPoint($measurement, $timestamp, $value, $tags, $values)
{
// $this->logger->trace("Create point $timestamp ($measurement)");
return new InfluxDB\Point(
$measurement,
$value,
$tags,
$values,
$timestamp
);
}
/**
* Write points to database
*
* @param InfluxDB\Point[] $points Array of points to write
* @return void
*/
public function writePoints($points)
{
$this->logger->debug('Writing '.count($points).' points');
try {
return $this->database->writePoints($points, InfluxDB\Database::PRECISION_SECONDS);
} catch (Exception $e) {
$this->logger->error('Can not write data');
$this->logger->debug($e->getMessage());
throw new Exception($e, 1);
}
}
}