#!/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.


# this is the shell script to start Slider deploying an application
# Usage: slider <action> <commands>

# The env variable SLIDER_JVM_OPTS can be used to override
# the default JVM opts

function usage
{
  echo "Usage: slider <action> <arguments>"
  echo ""
}

# Slider works out its own location 
this="${BASH_SOURCE-$0}"
bindir=$(cd -P -- "$(dirname -- "$this")" && pwd -P)
script="$(basename -- "$this")"

# lib directory is one up; it is expected to contain 
# slider.jar and any other dependencies that are not in the
# standard Hadoop classpath

slider_home="${bindir}/.."
slider_home=`cd -P "${slider_home}" && pwd -P`

libdir="${slider_home}/lib"
libdir=`cd -P "${libdir}" && pwd -P`


confdir="${slider_home}/conf"

# normalize the conf dir so it can be passed down
confdir=`cd -P "${confdir}" && pwd -P`
confdir=${SLIDER_CONF_DIR:-$confdir}


slider_jvm_opts="-Djava.net.preferIPv4Stack=true -Djava.awt.headless=true -Xmx256m -Djava.confdir=${confdir}"
slider_jvm_opts=${SLIDER_JVM_OPTS:-$slider_jvm_opts}

# allow for an extra classpath
slider_classpath_extra=${SLIDER_CLASSPATH_EXTRA:-""}

slider_classpath="${libdir}/*:${confdir}:${slider_classpath_extra}"

launcher=org.apache.slider.Slider


echo "slider_home = \"${slider_home}\""
echo "slider_jvm_opts = \"${slider_jvm_opts}\""
echo "classpath = \"${slider_classpath}\""
export CLASSPATH="${slider_classpath}"
echo ""

echo "command is java ${slider_jvm_opts} --classpath \"${slider_classpath}\" ${launcher} $@"
echo ""
echo ""
exec java ${slider_jvm_opts}  ${launcher} $@