Imported Upstream version 1.0.0upstream/1.0.0

1 files changed, 82 insertions, 0 deletions

diff --git a/charts.d/example.chart.sh b/charts.d/example.chart.sh
new file mode 100755
index 000000000..641d03e5d
--- /dev/null
+++ b/charts.d/example.chart.sh
@@ -0,0 +1,82 @@
+#!/bin/sh
+
+# if this chart is called X.chart.sh, then all functions and global variables
+# must start with X_
+
+# _update_every is a special variable - it holds the number of seconds
+# between the calls of the _update() function
+example_update_every=
+
+example_priority=150000
+
+# _check is called once, to find out if this chart should be enabled or not
+example_check() {
+	# this should return:
+	#  - 0 to enable the chart
+	#  - 1 to disable the chart
+
+	return 0
+}
+
+# _create is called once, to create the charts
+example_create() {
+	# create the chart with 3 dimensions
+	cat <<EOF
+CHART example.random '' "Random Numbers Stacked Chart" "% of random numbers" random random stacked $[example_priority] $example_update_every
+DIMENSION random1 '' percentage-of-absolute-row 1 1
+DIMENSION random2 '' percentage-of-absolute-row 1 1
+DIMENSION random3 '' percentage-of-absolute-row 1 1
+CHART example.random2 '' "A random number" "random number" random random area $[example_priority + 1] $example_update_every
+DIMENSION random '' absolute 1 1
+EOF
+
+	return 0
+}
+
+# _update is called continiously, to collect the values
+example_last=0
+example_count=0
+example_update() {
+	local value1 value2 value3 value4 mode
+
+	# the first argument to this function is the microseconds since last update
+	# pass this parameter to the BEGIN statement (see bellow).
+
+	# do all the work to collect / calculate the values
+	# for each dimension
+	# remember: KEEP IT SIMPLE AND SHORT
+
+	value1=$RANDOM
+	value2=$RANDOM
+	value3=$RANDOM
+	value4=$[8192 + (RANDOM * 16383 / 32767) ]
+
+	if [ $example_count -gt 0 ]
+		then
+		example_count=$[example_count - 1]
+
+		[ $example_last -gt 16383 ] && value4=$[example_last + (RANDOM * ( (32767 - example_last) / 2) / 32767)]
+		[ $example_last -le 16383 ] && value4=$[example_last - (RANDOM * (example_last / 2) / 32767)]
+	else
+		example_count=$[1 + (RANDOM * 5 / 32767) ]
+
+		[ $example_last -gt 16383 -a $value4 -gt 16383 ] && value4=$[value4 - 16383]
+		[ $example_last -le 16383 -a $value4 -lt 16383 ] && value4=$[value4 + 16383]
+	fi
+	example_last=$value4
+
+	# write the result of the work.
+	cat <<VALUESEOF
+BEGIN example.random $1
+SET random1 = $value1
+SET random2 = $value2
+SET random3 = $value3
+END
+BEGIN example.random2 $1
+SET random = $value4
+END
+VALUESEOF
+	# echo >&2 "example_count = $example_count value = $value4"
+
+	return 0
+}