#!/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.

bin=`which $0`
bin=`dirname ${bin}`
bin=`cd "$bin"; pwd`

LIBEXEC_DIR="$bin"/../libexec
JAVA=$JAVA_HOME/bin/java

function print_usage(){
  echo "Usage: crail COMMAND"
  echo "       where COMMAND is one of:"
  echo "  namenode             run the Crail namenode"
  echo "  datanode             run a Crail datanode"
  echo "  fsck                 run a Crail file check command"
  echo "  fs                   run a Crail shell command"
  echo "  iobench              run a Crail benchmark/test"
  echo "  test                 run a Crail unit test"
}

if [ $# = 0 ]; then
  print_usage
  exit
fi

COMMAND=$1
shift

case $COMMAND in
  # usage flags
  --help|-help|-h)
    print_usage
    exit
    ;;
esac

if [ "$COMMAND" = "namenode" ] ; then
  CLASS=org.apache.crail.namenode.NameNode
elif [ "$COMMAND" = "datanode" ] ; then
  CLASS=org.apache.crail.storage.StorageServer
elif [ "$COMMAND" = "fsck" ] ; then
  CLASS=org.apache.crail.tools.CrailFsck
elif [ "$COMMAND" = "fs" ] ; then
  CLASS=org.apache.hadoop.fs.FsShell
elif [ "$COMMAND" = "getconf" ] ; then
  CLASS=org.apache.crail.hdfs.GetConf
elif [ "$COMMAND" = "iobench" ] ; then
  CLASS=org.apache.crail.tools.CrailBenchmark
elif [ "$COMMAND" = "hdfsbench" ] ; then
  CLASS=org.apache.crail.hdfs.tools.HdfsIOBenchmark
elif [ "$COMMAND" = "test" ] ; then
  CLASS=org.junit.runner.JUnitCore
fi

CONF_PATH="$bin"/../conf
export CLASSPATH="$bin"/../jars/*:${CONF_PATH}:.
export LD_LIBRARY_PATH="$bin/../lib:$LD_LIBRARY_PATH"

if [ -f "${CONF_PATH}/crail-env.sh" ]; then
  # Promote all variable declarations to environment (exported) variables
  set -a
  . "${CONF_PATH}/crail-env.sh"
  set +a
fi

exec "$JAVA" -Dproc_$COMMAND -Dsun.nio.PageAlignDirectMemory=true $CRAIL_EXTRA_JAVA_OPTIONS $CLASS "$@"