Create a sample script to push availability data points to Hawkular M…

…etrics

samples/rhmap/script/send_availability.sh

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+#!/bin/bash
+#
+# Copyright 2014-2015 Red Hat, Inc. and/or its affiliates
+# and other contributors as indicated by the @author tags.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+#
+# Send an availability data point to an Hawkukar Metrics server.
+#
+# See 'usage' function for basic understanding.
+#
+# Note that the value parameter expects integers. This makes it easy to use this script to process the exit code of
+# a command or another script. For example:
+# ===
+# $> check_jvm_is_up
+# $> CODE=$?
+# $> send_availability "http://localhost:8080/hawkular/metrics" "my_tenant" "hostname.jvm" "$CODE"
+# ===
+#
+
+#set -x
+
+function usage {
+  echo "Usage: send_availability url tenant metric <value>
+  url: the Hawkular Metrics server URL, i.e. 'http://localhost:8080/hawkular/metrics'
+  tenant: the id of the tenant in Hawkular Metrics
+  metric: the id of the metric the data point belongs to
+  value: if present, must be a number; 0 means 'up', any other value 'down'; absent means 'unknown'
+"
+}
+
+function error {
+  echo "ERROR: $1" 1>&2
+}
+
+MIN_ARGUMENTS=3
+MAX_ARGUMENTS=$((MIN_ARGUMENTS + 1))
+
+if [ $# -lt ${MIN_ARGUMENTS} -o $# -gt ${MAX_ARGUMENTS} ]; then
+  error "Wrong number of arguments"
+  usage
+  exit 1
+fi
+
+if [ $# -eq ${MIN_ARGUMENTS} ]; then
+  AVAIL="unknown"
+else
+  VALUE_ARG=$4
+  if [ "$VALUE_ARG" -eq "$VALUE_ARG" ] 2>/dev/null; then
+    if [ ${VALUE_ARG} -eq 0 ]; then
+      AVAIL="up"
+    else
+      AVAIL="down"
+    fi
+  else
+    error "Value argument must be an integer."
+    usage
+    exit 1
+  fi
+fi
+
+HAWKULAR_METRICS_URL="$1/availability/data"
+TENANT_ID=$2
+METRIC_ID=$3
+
+TIMESTAMP=`date +%s%3N`
+read -r -d '' JSON <<- EOV
+    [{"id":"${METRIC_ID}","data":[{"timestamp":${TIMESTAMP},"value":"${AVAIL}"}]}]
+EOV
+
+RESPONSE=$(curl -i --silent -H "Hawkular-Tenant: $TENANT_ID" -H "Content-Type: application/json" \
+  ${HAWKULAR_METRICS_URL} --data ${JSON})
+STATUS_LINE=$(echo ${RESPONSE} | head -n 1)
+STATUS=$(echo ${STATUS_LINE} | awk '{print $2}')
+
+if [ ${STATUS} -ne 200 ]; then
+  error "Failed to persist availability data point: $RESPONSE"
+  exit 1
+fi
+
+exit 0