1 files changed, 129 insertions, 0 deletions
diff --git a/charts.d/tomcat.chart.sh b/charts.d/tomcat.chart.sh
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+#!/bin/bash
+
+# Description: Tomcat netdata charts.d plugin
+# Author: Jorge Romero
+
+# the URL to download tomcat status info
+# usually http://localhost:8080/manager/status?XML=true
+tomcat_url=""
+
+# set tomcat username/password here
+tomcatUser=""
+tomcatPassword=""
+
+# _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
+
+
+	# check if url, username, passwords are set
+	if [ -z "${tomcat_url}" ]; then
+	  	echo >&2 "tomcat url is unset or set to the empty string"
+		return 1
+	fi
+	if [ -z "${tomcatUser}" ]; then
+    	  	echo >&2 "tomcat user is unset or set to the empty string"
+		return 1
+	fi
+	if [ -z "${tomcatPassword}" ]; then
+    	  	echo >&2 "tomcat password is unset or set to the empty string"
+		return 1
+	fi
+
+	# check if we can get to tomcat's status page
+	tomcat_get
+	if [ $? -ne 0 ]
+		then
+		echo >&2 "tomcat: couldn't get to status page on URL '${tomcat_url}'."\
+		"Please make sure tomcat url, username and password are correct."
+		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 -u "$tomcatUser":"$tomcatPassword" -Ss "$tomcat_url" |\
+		xmlstarlet sel \
+			-t -m "/status/jvm/memory" -v @free \
+			-n -m "/status/connector[@name='\"http-bio-8080\"']/threadInfo" -v @currentThreadCount \
+			-n -v @currentThreadsBusy \
+			-n -m "/status/connector[@name='\"http-bio-8080\"']/requestInfo" -v @requestCount \
+			-n -v @bytesSent -n -)
+
+	tomcat_jvm_freememory="${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
+}