start-services.sh

#!/bin/bash
# Maintainer Joel Jacobson

VERSION="5.0.0"

       # to start the services you must be root
       if [ "$EUID" -ne 0 ]; then
       echo "Please run as root"
       exit 1
       fi

       # check if java is installed
       echo 'checking if java is installed'
       if type -p java; then
       echo 'found java executable in PATH'
       _java=java
       elif [[ -n "$JAVA_HOME" ]] && [[ -x "$JAVA_HOME/bin/java" ]];  then
       echo 'found java executable in JAVA_HOME'
       _java="$JAVA_HOME/bin/java"
       else
       echo "java is not installed"
       exit 1
       fi

       # check if java 8 is installed
       if [[ "$_java" ]]; then
       version=$("$_java" -version 2>&1 | awk -F '"' '/version/ {print $2}')
       echo version "$version"
       if [[ "$version" > "1.8" ]]; then
       echo 'java 8 is installed, proceeding... '
       else
       echo 'java version is lower than 1.8, please upgrade to 1.8 or higher to proceed'
       exit 1
       fi
       fi

    # check if cassandra is present
    if [ ! -f dse-$VERSION.tar.gz ] ; then
    echo "Package not found, if you don't have it, you can't get it!"
    exit 1
    fi

    # check if dse has been unpacked
    if [ ! -d hadoop ] & [ ! -d hulk ] & [ ! -d tinkerpop ] & [ ! -d bdp ] & [ ! -d incubator-tinkerpop ] ; then
    echo 'unpacking dse-5.0.0'
    tar xvf dse-$VERSION.tar.gz
    fi

# check if cassandra is running, if not start it
if ps aux | grep -v grep | grep cass &> /dev/null
then
echo '...cassandra is running...'
else
echo '...starting cassandra...'
bdp/bin/dse cassandra &> /dev/null
sleep 3
fi

# check if hulk is running, if not start it
if ps aux | grep -v grep | grep hulk &> /dev/null
then
echo '...hulk is running on http://127.0.0.1:9091...'
else
echo '...starting hulk...HULK IS TURNING GREEN!...'
cd hulk && nohup bin/hulk &> /dev/null &
echo '...Hulk SMASH on http://127.0.0.1:9091...'
fi

# start gremlin shell
echo '...starting gremlin shell...'
cd tinkerpop && bin/gremlin.sh