#!/usr/bin/env bash
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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.
#
# Configure Apache Cassandra after the ensemble has started.
#

set -x
set -e

CLOUD_PROVIDER=
while getopts "c:" OPTION; do
  case $OPTION in
  c)
    CLOUD_PROVIDER="$OPTARG"
    shift $((OPTIND-1)); OPTIND=1
    ;;
  esac
done

case $CLOUD_PROVIDER in
  # We want the gossip protocol to use internal (private) addresses, and the
  # client to use public addresses.
  # See http://wiki.apache.org/cassandra/FAQ#cant_listen_on_ip_any
  ec2)
    PRIVATE_SELF_HOST=`wget -q -O - http://169.254.169.254/latest/meta-data/local-ipv4`
    # EC2 is NATed
    PUBLIC_SELF_HOST=$PRIVATE_SELF_HOST
    ;;
  *)
    PUBLIC_SELF_HOST=`/sbin/ifconfig eth0 | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}'`
    PRIVATE_SELF_HOST=`/sbin/ifconfig eth1 | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}'`
    ;;
esac

config_file=/etc/cassandra/conf/storage-conf.xml

seeds=""

for server in "$@"; do
  seeds="${seeds}<Seed>${server}</Seed>"
done

#TODO set replication
sed -i -e "s|<Seed>127.0.0.1</Seed>|$seeds|" $config_file
sed -i -e "s|<ListenAddress>localhost</ListenAddress>|<ListenAddress>$PRIVATE_SELF_HOST</ListenAddress>|" $config_file
sed -i -e "s|<ThriftAddress>localhost</ThriftAddress>|<ThriftAddress>$PUBLIC_SELF_HOST</ThriftAddress>|" $config_file

# Now that it's configured, start Cassandra
nohup /etc/rc.local &