#!/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 dlog): http://wiki.apache.org/hadoop/HadoopIPv6"
  exit 1
fi

# See the following page for extensive details on setting
# up the JVM to accept JMX remote management:
# http://java.sun.com/javase/6/docs/technotes/guides/management/agent.html
# by default we allow local JMX connections
if [ "x$JMXLOCALONLY" = "x" ]
then
    JMXLOCALONLY=false
fi

if [ "x$JMXDISABLE" = "x" ]
then
    echo "JMX enabled by default" >&2
    # for some reason these two options are necessary on jdk6 on Ubuntu
    #   accord to the docs they are not necessary, but otw jconsole cannot
    #   do a local attach
    JMX_ARGS="-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.local.only=$JMXLOCALONLY"
else
    echo "JMX disabled by user request" >&2
fi

BINDIR=`dirname "$0"`
DLOG_HOME=`cd $BINDIR/.. > /dev/null;pwd`

DEFAULT_LOG_CONF=$DLOG_HOME/conf/log4j.properties

source $DLOG_HOME/conf/dlogenv.sh

# exclude tests jar
RELEASE_JAR=`ls $DLOG_HOME/distributedlog-*.jar 2> /dev/null | egrep -v 'tests|javadoc|sources' | tail -1`
if [ $? == 0 ]; then
    DLOG_JAR=$RELEASE_JAR
fi

# exclude tests jar
BUILT_JAR=`ls $DLOG_HOME/target/distributedlog-*.jar 2> /dev/null | egrep -v 'tests|javadoc|sources' | tail -1`
if [ $? != 0 ] && [ ! -e "$DLOG_JAR" ]; then
    echo "\nCouldn't find dlog jar.";
    echo "Make sure you've run 'mvn package'\n";
    exit 1;
elif [ -e "$BUILT_JAR" ]; then
    DLOG_JAR=$BUILT_JAR
fi

dlog_help() {
    cat <<EOF
Usage: runner <command>
where command is one of:
    run                 Run distributedlog example
    help                This help message

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

Environment variables:
   DLOG_LOG_CONF        Log4j configuration file (default $DEFAULT_LOG_CONF)
   DLOG_EXTRA_OPTS      Extra options to be passed to the jvm
   DLOG_EXTRA_CLASSPATH Add extra paths to the dlog classpath

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

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="${DLOG_HOME}/target/cached_classpath.txt"
    if [ ! -f "${f}" ]
    then
	${MVN} -f "${DLOG_HOME}/pom.xml" dependency:build-classpath -Dmdep.outputFile="${f}" &> /dev/null
    fi
    DLOG_CLASSPATH=${CLASSPATH}:`cat "${f}"`
}

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

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

# get arguments
COMMAND=$1
shift

if [ -z "$DLOG_LOG_CONF" ]; then
    DLOG_LOG_CONF=$DEFAULT_LOG_CONF
fi

DLOG_CLASSPATH="$DLOG_JAR:$DLOG_CLASSPATH:$DLOG_EXTRA_CLASSPATH"
if [ "$DLOG_LOG_CONF" != "" ]; then
    DLOG_CLASSPATH="`dirname $DLOG_LOG_CONF`:$DLOG_CLASSPATH"
    OPTS="$OPTS -Dlog4j.configuration=`basename $DLOG_LOG_CONF`"
fi
OPTS="-cp $DLOG_CLASSPATH $OPTS $DLOG_EXTRA_OPTS"

OPTS="$OPTS $DLOG_EXTRA_OPTS"

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

# log directory & file
DLOG_ROOT_LOGGER=${DLOG_ROOT_LOGGER:-"INFO,R"}
DLOG_LOG_DIR=${DLOG_LOG_DIR:-"$DLOG_HOME/logs"}
DLOG_LOG_FILE=${DLOG_LOG_FILE:-"dlog.log"}

#Configure log configuration system properties
OPTS="$OPTS -Ddlog.root.logger=$DLOG_ROOT_LOGGER"
OPTS="$OPTS -Ddlog.log.dir=$DLOG_LOG_DIR"
OPTS="$OPTS -Ddlog.log.file=$DLOG_LOG_FILE"

#Change to DLOG_HOME to support relative paths
cd "$DLOG_HOME"
if [ $COMMAND == "run" ]; then
    exec java $OPTS $@
elif [ $COMMAND == "help" ]; then
    dlog_help;
else
    dlog_help;
fi