add an option to exclude some sensors

[netdata.git] / charts.d / example.chart.sh

diff --git a/charts.d/example.chart.sh b/charts.d/example.chart.sh
index aa1005d11aec536a75b4d6c96b7e0a56d38e85d6..ad205046219dfb6994fc2c11c6b90418ba6c20b9 100755 (executable)
--- a/charts.d/example.chart.sh
+++ b/charts.d/example.chart.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # if this chart is called X.chart.sh, then all functions and global variables
 # must start with X_
@@ -7,6 +7,8 @@
 # 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:
@@ -20,17 +22,23 @@ example_check() {
 example_create() {
        # create the chart with 3 dimensions
        cat <<EOF
-CHART example.random '' "Random Numbers Stacked Chart" "% of random numbers" random random stacked 5000 $example_update_every
+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).
 
@@ -41,6 +49,21 @@ example_update() {
        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
@@ -49,8 +72,11 @@ 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
 }
-