Heiko Henning GreenRover

GreenRover / pthread_singleton_example.php

Created July 29, 2015 12:17

	<?php

	class Singelton extends ArrayObject {
	private static $_registry = null;

	public static function getInstance() {
	if (self::$_registry === null) {
	self::$_registry = new Singelton();
	}

GreenRover / demo.csv

Last active August 29, 2015 14:22

Huge data store performance compare

We can't make this file beautiful and searchable because it's too large.

	MACHINE_IDENTIFIER;cfg;"RUB20:_Energie:Zähler:Bezug Total"
	CLASS;cfg;"CounterUp"
	UNIT;cfg;"kWh"
	1190756700;x;0.000000000000000
	1190757600;x;0.122685185185190
	1190758500;x;0.245370370370370
	1190759400;x;0.368055555555560
	1190760300;x;0.490740740740740
	1190761200;x;0.613425925925930

GreenRover / not working example 001

Created May 28, 2015 18:39

Cassandra aggragation trigger

	update sensor_data_aggregated_hour_min
	set min_value=sensor_data.value,
	min_timestamp=sensor_data.timestamp
	where
	sensor=sensor_data.sensor
	and aggregation='hour'
	and timestamp=DATE_FORMAT(sensor_data.timestamp, '%Y-%m-%d %H:00:00+0200');
	if sensor_data.value<min_value;

	update sensor_data_aggregated_hour_max