Spark on Jupyterでexternal jarを使う

- jupyterのspark kernel toreeは内部でspark-submitを実行している。なので、そのオプションに外部jar設定を追加する。
- kernel.jsonの追加でいけるが、毎度書き換えるのは嫌なので、extjarsに放り込めば使えるようにrun.shを変更する。


```/usr/local/share/jupyter/kernels/toree/bin/run.sh
#!/usr/bin/env bash                                                                                                                                      

#                                                                                                                                                        
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                                           ``
PROG_HOME="$(cd "`dirname "$0"`"/..; pwd)"

if [ -z "$SPARK_HOME" ]; then
  echo "SPARK_HOME must be set to the location of a Spark distribution!"
  exit 1
fi

echo "Starting Spark Kernel with SPARK_HOME=$SPARK_HOME"

KERNEL_ASSEMBLY=`(cd ${PROG_HOME}/lib; ls -1 toree-kernel-assembly-*.jar;)`

# disable randomized hash for string in Python 3.3+                                                                                                      
export PYTHONHASHSEED=0

# added to handle extjars.                                                                                                                                       
extjars=""
for jar in $(ls ${PROG_HOME}/extlib/*.jar) ; do
    if [ ! -z $extjars ] ; then
        extjars="$extjars,$jar"
    else
        extjars=$jar
    fi
done
echo $extjars >/tmp/toree.log

SPARK_OPTS="$SPARK_OPTS --jars $extjars"

echo "${SPARK_HOME}/bin/spark-submit ${SPARK_OPTS} --class org.apache.toree.Main $PROG_HOME/lib/${KERNEL_ASSEMBLY}" >> /tmp/toree.log

exec "$SPARK_HOME"/bin/spark-submit \
    ${SPARK_OPTS} \
    --class org.apache.toree.Main $PROG_HOME/lib/${KERNEL_ASSEMBLY} "$@"

```