Merge pull request #277 from jgeromero/tomcat.chart.sh

tomcat.chart.sh plugin

diff --git a/charts.d/tomcat.chart.sh b/charts.d/tomcat.chart.sh
new file mode 100755 (executable)
index 0000000..55476f4
--- /dev/null
+++ b/charts.d/tomcat.chart.sh
@@ -0,0 +1,101 @@
+#!/bin/bash
+
+# Description: Tomcat netdata charts.d plugin
+# Author: Jorge Romero
+
+# the URL to download tomcat status info
+tomcat_url="http://localhost:8080/manager/status?XML=true"
+
+# _update_every is a special variable - it holds the number of seconds
+# between the calls of the _update() function
+tomcat_update_every=
+
+tomcat_priority=60000
+
+# convert tomcat floating point values
+# to integer using this multiplier
+# this only affects precision - the values
+# will be in the proper units
+tomcat_decimal_detail=1000000
+
+# used by volume chart to convert bytes to KB
+tomcat_decimal_KB_detail=1000
+
+tomcat_check() {
+
+       require_cmd xmlstarlet || return 1
+
+       tomcat_get
+       if [ $? -ne 0 ]
+               then
+               echo >&2 "tomcat: cannot find stub_status on URL '${tomcat_url}'. Please set tomcat_url='http://<user>:<password>@localhost:8080/manager/status?XML=true'"
+               return 1
+       fi
+
+       # this should return:
+       #  - 0 to enable the chart
+       #  - 1 to disable the chart
+
+       return 0
+}
+
+tomcat_get() {
+       # Collect tomcat values
+       mapfile -t lines < <(curl -s "$tomcat_url" | xmlstarlet sel -t -m "/status/jvm/memory" -v @free -n -m "/status/connector[@name='\"http-bio-8080\"']/threadInfo" -v @currentThreadCount -n -v @currentThreadsBusy -n -m "/status/connector[@name='\"http-bio-8080\"']/requestInfo" -v @requestCount -n -v @bytesSent -n -)
+
+       tomcat_jvm_freememory="${lines[0]}"
+       tomcat_threads="${lines[1]}"
+       tomcat_threads_busy="${lines[2]}"
+       tomcat_accesses="${lines[3]}"
+       tomcat_volume="${lines[4]}"
+
+       return 0
+}
+
+# _create is called once, to create the charts
+tomcat_create() {
+       cat <<EOF
+CHART tomcat.accesses '' "tomcat requests" "requests/s" statistics tomcat.accesses area $[tomcat_priority + 8] $tomcat_update_every
+DIMENSION accesses '' incremental
+CHART tomcat.volume '' "tomcat volume" "KB/s" volume tomcat.volume area $[tomcat_priority + 5] $tomcat_update_every
+DIMENSION volume '' incremental divisor ${tomcat_decimal_KB_detail}
+CHART tomcat.threads '' "tomcat threads" "current threads" statistics tomcat.threads line $[tomcat_priority + 6] $tomcat_update_every
+DIMENSION current '' absolute 1
+DIMENSION busy '' absolute 1
+CHART tomcat.jvm '' "JVM Free Memory" "MB" statistics tomcat.jvm area $[tomcat_priority + 8] $tomcat_update_every
+DIMENSION jvm '' absolute 1 ${tomcat_decimal_detail}
+EOF
+       return 0
+}
+
+# _update is called continiously, to collect the values
+tomcat_update() {
+       local reqs net
+       # 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
+
+       tomcat_get || return 1
+
+       # write the result of the work.
+       cat <<VALUESEOF
+BEGIN tomcat.accesses $1
+SET accesses = $[tomcat_accesses]
+END
+BEGIN tomcat.volume $1
+SET volume = $[tomcat_volume]
+END
+BEGIN tomcat.threads $1
+SET current = $[tomcat_threads]
+SET busy = $[tomcat_threads_busy]
+END
+BEGIN tomcat.jvm $1
+SET jvm = $[tomcat_jvm_freememory]
+END
+VALUESEOF
+
+       return 0
+}