#!/usr/bin/env bash
#
#/**
# * Copyright 2007 The Apache Software Foundation
# *
# * 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.
# */

# check if net.ipv6.bindv6only is set to 1
bindv6only=$(/sbin/sysctl -n net.ipv6.bindv6only 2> /dev/null)
if [ -n "$bindv6only" ] && [ "$bindv6only" -eq "1" ]
then
  echo "Error: \"net.ipv6.bindv6only\" is set to 1 - Java networking could be broken"
  echo "For more info (the following page also applies to hedwig): http://wiki.apache.org/hadoop/HadoopIPv6"
  exit 1
fi

BINDIR=`dirname "$0"`
HW_HOME=`cd $BINDIR/..;pwd`

DEFAULT_CONF=$HW_HOME/conf/hw_server.conf

RELEASE_JAR=`ls $HW_HOME/hedwig-server-*.jar 2> /dev/null | tail -1`
if [ $? == 0 ]; then
    HEDWIG_JAR=$RELEASE_JAR
fi

BUILT_JAR=`ls $HW_HOME/target/hedwig-server-*.jar 2> /dev/null | tail -1`
if [ $? != 0 ] && [ ! -e "$HEDWIG_JAR" ]; then 
    echo "\nCouldn't find hedwig jar.";
    echo "Make sure you've run 'mvn package'\n";
    exit 1;
elif [ -e "$BUILT_JAR" ]; then
    HEDWIG_JAR=$BUILT_JAR
fi

add_maven_deps_to_classpath() {
    MVN="mvn"
    if [ "$MAVEN_HOME" != "" ]; then
	MVN=${MAVEN_HOME}/bin/mvn
    fi
    
    # Need to generate classpath from maven pom. This is costly so generate it
    # and cache it. Save the file into our target dir so a mvn clean will get
    # clean it up and force us create a new one.
    f="${HW_HOME}/target/cached_classpath.txt"
    if [ ! -f "${f}" ]
    then
	${MVN} -f "${HW_HOME}/pom.xml" dependency:build-classpath -Dmdep.outputFile="${f}" &> /dev/null
    fi
    HEDWIG_CLASSPATH=${CLASSPATH}:`cat "${f}"`
}

if [ -d "$HW_HOME/lib" ]; then
    for i in $HW_HOME/lib/*.jar; do
	HEDWIG_CLASSPATH=$HEDWIG_CLASSPATH:$i
    done
else
    add_maven_deps_to_classpath
fi

hedwig_help() {
    cat <<EOF
Usage: hedwig <command>
where command is one of:
    server           Run the hedwig server
    help             This help message

or command is the full name of a class with a defined main() method.

Environment variables:
   HEDWIG_SERVER_CONF     Hedwig server configuration file (default $DEFAULT_CONF)
   HEDWIG_LOG_CONF        Log4j configuration file
   HEDWIG_EXTRA_OPTS      Extra options to be passed to the jvm

These variable can also be set in conf/hwenv.sh
EOF
}

# if no args specified, show usage
if [ $# = 0 ]; then
    hedwig_help;
    exit 1;
fi

# get arguments
COMMAND=$1
shift

if [ "$HEDWIG_SERVER_CONF" == "" ]; then
    HEDWIG_SERVER_CONF=$DEFAULT_CONF;
fi

HEDWIG_CLASSPATH="$HEDWIG_JAR:$HEDWIG_CLASSPATH"

if [ "$HEDWIG_LOG_CONF" != "" ]; then
    HEDWIG_CLASSPATH="`dirname $HEDWIG_LOG_CONF`:$HEDWIG_CLASSPATH"
    OPTS="$OPTS -Dlog4j.configuration=`basename $HEDWIG_LOG_CONF`"
fi
OPTS="-cp $HEDWIG_CLASSPATH $OPTS $HEDWIG_EXTRA_OPTS"

# Disable ipv6 as it can cause issues
OPTS="$OPTS -Djava.net.preferIPv4Stack=true"

if [ $COMMAND == "server" ]; then
    exec java $OPTS org.apache.hedwig.server.netty.PubSubServer $HEDWIG_SERVER_CONF $@
elif [ $COMMAND == "help" ]; then
    hedwig_help;
else
    exec java $OPTS $COMMAND $@
fi