tomcat charts.d plugin
Jorge Romero committed
Apr 19, 2016 at 12:20 UTC
7516186fe199ebd60236b60952b3ee33b6397c1d
1 file changed
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charts.d/tomcat.chart.sh
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+#!/bin/sh
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+
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+# Description: Tomcat netdata charts.d plugin
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+# Author: Jorge Romero
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+
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+# the URL to download tomcat status info
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+tomcat_url="http://<user>:<password>@localhost:8080/manager/status?XML=true"
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+
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+# _update_every is a special variable - it holds the number of seconds
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+# between the calls of the _update() function
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+tomcat_update_every=
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+
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+tomcat_priority=60000
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+
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+# convert tomcat floating point values
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+# to integer using this multiplier
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+# this only affects precision - the values
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+# will be in the proper units
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+tomcat_decimal_detail=1000000
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+
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+# used by volume chart to convert bytes to KB
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+tomcat_decimal_KB_detail=1000
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+
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+tomcat_check() {
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+
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+ tomcat_get
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+ if [ $? -ne 0 ]
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+ then
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+ echo >&2 "tomcat: cannot find stub_status on URL '${tomcat_url}'. Please set tomcat_url='http://<user>:<password>@localhost:8080/manager/status?XML=true'"
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+ return 1
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+ fi
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+
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+ # this should return:
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+ # - 0 to enable the chart
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+ # - 1 to disable the chart
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+
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+ return 0
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+}
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+
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+tomcat_get() {
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+
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+ tomcat_accesses=$(curl -s "${tomcat_url}" | xmllint --xpath "string(/status/connector[@name='\"http-bio-8080\"']/requestInfo/@requestCount)" - )
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+ tomcat_volume=$(curl -s "${tomcat_url}" | xmllint --xpath "string(/status/connector[@name='\"http-bio-8080\"']/requestInfo/@bytesSent)" - )
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+ tomcat_threads=$(curl -s "${tomcat_url}" | xmllint --xpath "string(/status/connector[@name='\"http-bio-8080\"']/threadInfo/@currentThreadCount)" -)
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+ tomcat_threads_busy=$(curl -s "${tomcat_url}" | xmllint --xpath "string(/status/connector[@name='\"http-bio-8080\"']/threadInfo/@currentThreadsBusy)" -)
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+ tomcat_jvm_freememory=$(curl -s "${tomcat_url}" | xmllint --xpath "string(/status/jvm/memory/@free)" - )
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+
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+ return 0
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+}
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+
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+# _create is called once, to create the charts
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+tomcat_create() {
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+ cat <<EOF
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+CHART tomcat.accesses '' "tomcat requests" "requests/s" statistics tomcat.accesses area $[tomcat_priority + 8] $tomcat_update_every
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+DIMENSION accesses '' incremental
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+CHART tomcat.volume '' "tomcat volume" "KB/s" volume tomcat.volume area $[tomcat_priority + 5] $tomcat_update_every
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+DIMENSION volume '' incremental divisor ${tomcat_decimal_KB_detail}
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+CHART tomcat.threads '' "tomcat threads" "current threads" statistics tomcat.threads line $[tomcat_priority + 6] $tomcat_update_every
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+DIMENSION current '' absolute 1
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+DIMENSION busy '' absolute 1
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+CHART tomcat.jvm '' "JVM Free Memory" "MB" statistics tomcat.jvm area $[tomcat_priority + 8] $tomcat_update_every
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+DIMENSION jvm '' absolute 1 ${tomcat_decimal_detail}
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+EOF
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+ return 0
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+}
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+
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+# _update is called continiously, to collect the values
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+tomcat_update() {
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+ local reqs net
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+ # the first argument to this function is the microseconds since last update
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+ # pass this parameter to the BEGIN statement (see bellow).
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+
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+ # do all the work to collect / calculate the values
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+ # for each dimension
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+ # remember: KEEP IT SIMPLE AND SHORT
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+
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+ tomcat_get || return 1
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+
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+ # write the result of the work.
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+ cat <<VALUESEOF
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+BEGIN tomcat.accesses $1
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+SET accesses = $[tomcat_accesses]
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+END
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+BEGIN tomcat.volume $1
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+SET volume = $[tomcat_volume]
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+END
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+BEGIN tomcat.threads $1
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+SET current = $[tomcat_threads]
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+SET busy = $[tomcat_threads_busy]
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+END
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+BEGIN tomcat.jvm $1
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+SET jvm = $[tomcat_jvm_freememory]
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+END
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+VALUESEOF
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+
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+ return 0
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+}