#!/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.

#
# If this scripted is run out of /usr/bin or some other system bin directory
# it should be linked to and not copied. Things like java jar files are found
# relative to the canonical path of this script.
#

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

# Only follow symlinks if readlink supports it
if readlink -f "$0" > /dev/null 2>&1
then
  ZOOBIN=`readlink -f "$0"`
else
  ZOOBIN="$0"
fi
ZOOBINDIR=`dirname "$ZOOBIN"`

. "$ZOOBINDIR"/zkEnv.sh

if [ "x$2" != "x" ]
then
    ZOOCFG="$ZOOCFGDIR/$2"
fi

if $cygwin
then
    ZOOCFG=`cygpath -wp "$ZOOCFG"`
    # cygwin has a "kill" in the shell itself, gets confused
    KILL=/bin/kill
else
    KILL=kill
fi

echo "Using config: $ZOOCFG"

ZOOPIDFILE=$(grep dataDir "$ZOOCFG" | sed -e 's/.*=//')/zookeeper_server.pid


case $1 in
start)
    echo  "Starting zookeeper ... "
    $JAVA  "-Dzookeeper.log.dir=${ZOO_LOG_DIR}" "-Dzookeeper.root.logger=${ZOO_LOG4J_PROP}" \
    -cp "$CLASSPATH" $JVMFLAGS $ZOOMAIN "$ZOOCFG" &
    /bin/echo -n $! > "$ZOOPIDFILE"
    echo STARTED
    ;;
stop)
    echo "Stopping zookeeper ... "
    if [ ! -f "$ZOOPIDFILE" ]
    then
    echo "error: could not find file $ZOOPIDFILE"
    exit 1
    else
    $KILL -9 $(cat "$ZOOPIDFILE")
    rm "$ZOOPIDFILE"
    echo STOPPED
    fi
    ;;
upgrade)
    shift
    echo "upgrading the servers to 3.*"
    java "-Dzookeeper.log.dir=${ZOO_LOG_DIR}" "-Dzookeeper.root.logger=${ZOO_LOG4J_PROP}" \
    -cp "$CLASSPATH" $JVMFLAGS org.apache.zookeeper.server.upgrade.UpgradeMain ${@}
    echo "Upgrading ... "
    ;;
restart)
    shift
    "$0" stop ${@}
    sleep 3
    "$0" start ${@}
    ;;
status)
    STAT=`echo stat | nc localhost $(grep clientPort "$ZOOCFG" | sed -e 's/.*=//') 2> /dev/null| grep Mode`
    if [ "x$STAT" = "x" ]
    then
        echo "Error contacting service. It is probably not running."
    else
        echo $STAT
    fi
    ;;
*)
    echo "Usage: $0 {start|stop|restart|status}" >&2

esac
