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ActiveMQ example source code file (activemq)

This example ActiveMQ source code file (activemq) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - ActiveMQ tags/keywords

The ActiveMQ activemq source code

#! /bin/sh

# ------------------------------------------------------------------------
# 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.
# ------------------------------------------------------------------------

# Application
APP_NAME="ActiveMQ"
APP_LONG_NAME="ActiveMQ Broker"
ACTIVEMQ_HOME="../.."

# Wrapper
WRAPPER_CMD="wrapper"
WRAPPER_CONF="wrapper.conf"

# Priority at which to run the wrapper.  See "man nice" for valid priorities.
#  nice is only used if a priority is specified.
PRIORITY=

# Location of the pid file.
PIDDIR="."

# If uncommented, causes the Wrapper to be shutdown using an anchor file.
#  When launched with the 'start' command, it will also ignore all INT and
#  TERM signals.
#IGNORE_SIGNALS=true

# If specified, the Wrapper will be run as the specified user.
# IMPORTANT - Make sure that the user has the required privileges to write
#  the PID file and wrapper.log files.  Failure to be able to write the log
#  file will cause the Wrapper to exit without any way to write out an error
#  message.
# NOTE - This will set the user which is used to run the Wrapper as well as
#  the JVM and is not useful in situations where a privileged resource or
#  port needs to be allocated prior to the user being changed.
#RUN_AS_USER=

# The following two lines are used by the chkconfig command. Change as is
#  appropriate for your application.  They should remain commented.
# chkconfig: 2345 20 80
# description: @app.long.name@

# Do not modify anything beyond this point
#-----------------------------------------------------------------------------

# load system-wide activemq configuration
if [ -f "/etc/sysconfig/activemq" ] ; then
  . /etc/sysconfig/activemq
fi

# Get the fully qualified path to the script
case $0 in
    /*)
        SCRIPT="$0"
        ;;
    *)
        PWD=`pwd`
        SCRIPT="$PWD/$0"
        ;;
esac

# Resolve the true real path without any sym links.
CHANGED=true
while [ "X$CHANGED" != "X" ]
do
    # Change spaces to ":" so the tokens can be parsed.
    SCRIPT=`echo $SCRIPT | sed -e 's; ;:;g'`
    # Get the real path to this script, resolving any symbolic links
    TOKENS=`echo $SCRIPT | sed -e 's;/; ;g'`
    REALPATH=
    for C in $TOKENS; do
        REALPATH="$REALPATH/$C"
        while [ -h "$REALPATH" ] ; do
            LS="`ls -ld "$REALPATH"`"
            LINK="`expr "$LS" : '.*-> \(.*\)$'`"
            if expr "$LINK" : '/.*' > /dev/null; then
                REALPATH="$LINK"
            else
                REALPATH="`dirname "$REALPATH"`""/$LINK"
            fi
        done
    done
    # Change ":" chars back to spaces.
    REALPATH=`echo $REALPATH | sed -e 's;:; ;g'`

    if [ "$REALPATH" = "$SCRIPT" ]
    then
        CHANGED=""
    else
        SCRIPT="$REALPATH"
    fi
done

# Change the current directory to the location of the script
cd "`dirname "$REALPATH"`"
REALDIR=`pwd`

# If the PIDDIR is relative, set its value relative to the full REALPATH to avoid problems if
#  the working directory is later changed.
FIRST_CHAR=`echo $PIDDIR | cut -c1,1`
if [ "$FIRST_CHAR" != "/" ]
then
    PIDDIR=$REALDIR/$PIDDIR
fi
# Same test for WRAPPER_CMD
FIRST_CHAR=`echo $WRAPPER_CMD | cut -c1,1`
if [ "$FIRST_CHAR" != "/" ]
then
    WRAPPER_CMD=$REALDIR/$WRAPPER_CMD
fi
# Same test for WRAPPER_CONF
FIRST_CHAR=`echo $WRAPPER_CONF | cut -c1,1`
if [ "$FIRST_CHAR" != "/" ]
then
    WRAPPER_CONF=$REALDIR/$WRAPPER_CONF
fi

# Process ID
ANCHORFILE="$PIDDIR/$APP_NAME.anchor"
PIDFILE="$PIDDIR/$APP_NAME.pid"
LOCKDIR="/var/lock/subsys"
LOCKFILE="$LOCKDIR/$APP_NAME"
pid=""

# Resolve the location of the 'ps' command
PSEXE="/usr/bin/ps"
if [ ! -x $PSEXE ]
then
    PSEXE="/bin/ps"
    if [ ! -x $PSEXE ]
    then
        echo "Unable to locate 'ps'."
        echo "Please report this message along with the location of the command on your system."
        exit 1
    fi
fi

# Resolve the os
DIST_OS=`uname -s | tr [:upper:] [:lower:] | tr -d [:blank:]`
case "$DIST_OS" in
    'sunos')
        DIST_OS="solaris"
        ;;
    'hp-ux' | 'hp-ux64')
        DIST_OS="hpux"
        ;;
    'darwin')
        DIST_OS="macosx"
        ;;
    'unix_sv')
        DIST_OS="unixware"
        ;;
esac

# Resolve the architecture
DIST_ARCH=`uname -p 2>/dev/null | tr [:upper:] [:lower:] | tr -d [:blank:]`
if [ "$DIST_ARCH" = "unknown" ] || [ "$DIST_ARCH" = "" ]
then
    DIST_ARCH=`uname -m | tr [:upper:] [:lower:] | tr -d [:blank:]`
fi
case "$DIST_ARCH" in
    'amd64' | 'ia32' | 'ia64' | 'i386' | 'i486' | 'i586' | 'i686' | 'x86_64')
        DIST_ARCH="x86"
        ;;
    'ip27')
        DIST_ARCH="mips"
        ;;
    'power' | 'powerpc' | 'power_pc' | 'ppc64')
        DIST_ARCH="ppc"
        ;;
    'pa_risc' | 'pa-risc')
        DIST_ARCH="parisc"
        ;;
    'sun4u' | 'sparcv9')
        DIST_ARCH="sparc"
        ;;
    '9000/800')
        DIST_ARCH="parisc"
        ;;
esac

# Decide on the wrapper binary to use.
# If a 32-bit wrapper binary exists then it will work on 32 or 64 bit
#  platforms, if the 64-bit binary exists then the distribution most
#  likely wants to use long names.  Otherwise, look for the default.
# For macosx, we also want to look for universal binaries.
WRAPPER_TEST_CMD="$WRAPPER_CMD-$DIST_OS-$DIST_ARCH-32"
if [ -x $WRAPPER_TEST_CMD ]
then
    WRAPPER_CMD="$WRAPPER_TEST_CMD"
else
    if [ "$DIST_OS" = "macosx" ]
    then
        WRAPPER_TEST_CMD="$WRAPPER_CMD-$DIST_OS-universal-32"
        if [ -x $WRAPPER_TEST_CMD ]
        then
            WRAPPER_CMD="$WRAPPER_TEST_CMD"
        else
            WRAPPER_TEST_CMD="$WRAPPER_CMD-$DIST_OS-$DIST_ARCH-64"
            if [ -x $WRAPPER_TEST_CMD ]
            then
                WRAPPER_CMD="$WRAPPER_TEST_CMD"
            else
                WRAPPER_TEST_CMD="$WRAPPER_CMD-$DIST_OS-universal-64"
                if [ -x $WRAPPER_TEST_CMD ]
                then
                    WRAPPER_CMD="$WRAPPER_TEST_CMD"
                else
                    if [ ! -x $WRAPPER_CMD ]
                    then
                        echo "Unable to locate any of the following binaries:"
                        echo "  $WRAPPER_CMD-$DIST_OS-$DIST_ARCH-32"
                        echo "  $WRAPPER_CMD-$DIST_OS-universal-32"
                        echo "  $WRAPPER_CMD-$DIST_OS-$DIST_ARCH-64"
                        echo "  $WRAPPER_CMD-$DIST_OS-universal-64"
                        echo "  $WRAPPER_CMD"
                        exit 1
                    fi
                fi
            fi
        fi
    else
        WRAPPER_TEST_CMD="$WRAPPER_CMD-$DIST_OS-$DIST_ARCH-64"
        if [ -x $WRAPPER_TEST_CMD ]
        then
            WRAPPER_CMD="$WRAPPER_TEST_CMD"
        else
            if [ ! -x $WRAPPER_CMD ]
            then
                echo "Unable to locate any of the following binaries:"
                echo "  $WRAPPER_CMD-$DIST_OS-$DIST_ARCH-32"
                echo "  $WRAPPER_CMD-$DIST_OS-$DIST_ARCH-64"
                echo "  $WRAPPER_CMD"
                exit 1
            fi
        fi
    fi
fi
 
# Build the nice clause
if [ "X$PRIORITY" = "X" ]
then
    CMDNICE=""
else
    CMDNICE="nice -$PRIORITY"
fi

# Build the anchor file clause.
if [ "X$IGNORE_SIGNALS" = "X" ]
then
   ANCHORPROP=
   IGNOREPROP=
else
   ANCHORPROP=wrapper.anchorfile=$ANCHORFILE
   IGNOREPROP=wrapper.ignore_signals=TRUE
fi

# Build the lock file clause.  Only create a lock file if the lock directory exists on this platform.
if [ -d $LOCKDIR ]
then
    LOCKPROP=wrapper.lockfile=$LOCKFILE
else
    LOCKPROP=
fi

checkUser() {
    # Check the configured user.  If necessary rerun this script as the desired user.
    if [ "X$RUN_AS_USER" != "X" ]
    then
        # Resolve the location of the 'id' command
        IDEXE="/usr/xpg4/bin/id"
        if [ ! -x $IDEXE ]
        then
            IDEXE="/usr/bin/id"
            if [ ! -x $IDEXE ]
            then
                echo "Unable to locate 'id'."
                echo "Please report this message along with the location of the command on your system."
                exit 1
            fi
        fi
    
        if [ "`$IDEXE -u -n`" = "$RUN_AS_USER" ]
        then
            # Already running as the configured user.  Avoid password prompts by not calling su.
            RUN_AS_USER=""
        fi
    fi
    if [ "X$RUN_AS_USER" != "X" ]
    then
        # If LOCKPROP and $RUN_AS_USER are defined then the new user will most likely not be
        # able to create the lock file.  The Wrapper will be able to update this file once it
        # is created but will not be able to delete it on shutdown.  If $2 is defined then
        # the lock file should be created for the current command
        if [ "X$LOCKPROP" != "X" ]
        then
            if [ "X$2" != "X" ]
            then
                # Resolve the primary group 
                RUN_AS_GROUP=`groups $RUN_AS_USER | awk '{print $3}' | tail -1`
                if [ "X$RUN_AS_GROUP" = "X" ]
                then
                    RUN_AS_GROUP=$RUN_AS_USER
                fi
                touch $LOCKFILE
                chown $RUN_AS_USER:$RUN_AS_GROUP $LOCKFILE
            fi
        fi

        # Still want to change users, recurse.  This means that the user will only be
        #  prompted for a password once.
        su -m $RUN_AS_USER -c "$REALPATH $1"

        # Now that we are the original user again, we may need to clean up the lock file.
        if [ "X$LOCKPROP" != "X" ]
        then
            getpid
            if [ "X$pid" = "X" ]
            then
                # Wrapper is not running so make sure the lock file is deleted.
                if [ -f $LOCKFILE ]
                then
                    rm $LOCKFILE
                fi
            fi
        fi

        exit 0
    fi
}

getpid() {
    if [ -f $PIDFILE ]
    then
        if [ -r $PIDFILE ]
        then
            pid=`cat $PIDFILE`
            if [ "X$pid" != "X" ]
            then
                # It is possible that 'a' process with the pid exists but that it is not the
                #  correct process.  This can happen in a number of cases, but the most
                #  common is during system startup after an unclean shutdown.
                # The ps statement below looks for the specific wrapper command running as
                #  the pid.  If it is not found then the pid file is considered to be stale.
                pidtest=`$PSEXE -p $pid -o args | grep $WRAPPER_CMD | tail -1`
                if [ "X$pidtest" = "X" ]
                then
                    # This is a stale pid file.
                    rm -f $PIDFILE
                    echo "Removed stale pid file: $PIDFILE"
                    pid=""
                fi
            fi
        else
            echo "Cannot read $PIDFILE."
            exit 1
        fi
    fi
}

testpid() {
    pid=`$PSEXE -p $pid | grep $pid | grep -v grep | awk '{print $1}' | tail -1`
    if [ "X$pid" = "X" ]
    then
        # Process is gone so remove the pid file.
        rm -f $PIDFILE
        pid=""
    fi
}

console() {
    echo "Running $APP_LONG_NAME..."
    getpid
    if [ "X$pid" = "X" ]
    then
        COMMAND_LINE="$CMDNICE $WRAPPER_CMD $WRAPPER_CONF wrapper.syslog.ident=$APP_NAME wrapper.pidfile=$PIDFILE $ANCHORPROP $LOCKPROP"
        exec $COMMAND_LINE
    else
        echo "$APP_LONG_NAME is already running."
        exit 1
    fi
}
 
start() {
    echo "Starting $APP_LONG_NAME..."
    getpid
    if [ "X$pid" = "X" ]
    then
        COMMAND_LINE="$CMDNICE $WRAPPER_CMD $WRAPPER_CONF wrapper.syslog.ident=$APP_NAME wrapper.pidfile=$PIDFILE wrapper.daemonize=TRUE $ANCHORPROP $IGNOREPROP $LOCKPROP"
        exec $COMMAND_LINE
    else
        echo "$APP_LONG_NAME is already running."
        exit 1
    fi
}
 
stopit() {
    echo "Stopping $APP_LONG_NAME..."
    getpid
    if [ "X$pid" = "X" ]
    then
        echo "$APP_LONG_NAME was not running."
    else
        if [ "X$IGNORE_SIGNALS" = "X" ]
        then
            # Running so try to stop it.
            kill $pid
            if [ $? -ne 0 ]
            then
                # An explanation for the failure should have been given
                echo "Unable to stop $APP_LONG_NAME."
                exit 1
            fi
        else
            rm -f $ANCHORFILE
            if [ -f $ANCHORFILE ]
            then
                # An explanation for the failure should have been given
                echo "Unable to stop $APP_LONG_NAME."
                exit 1
            fi
        fi

        # We can not predict how long it will take for the wrapper to
        #  actually stop as it depends on settings in wrapper.conf.
        #  Loop until it does.
        savepid=$pid
        CNT=0
        TOTCNT=0
        while [ "X$pid" != "X" ]
        do
            # Show a waiting message every 5 seconds.
            if [ "$CNT" -lt "5" ]
            then
                CNT=`expr $CNT + 1`
            else
                echo "Waiting for $APP_LONG_NAME to exit..."
                CNT=0
            fi
            TOTCNT=`expr $TOTCNT + 1`

            sleep 1

            testpid
        done

        pid=$savepid
        testpid
        if [ "X$pid" != "X" ]
        then
            echo "Failed to stop $APP_LONG_NAME."
            exit 1
        else
            echo "Stopped $APP_LONG_NAME."
        fi
    fi
}

status() {
    getpid
    if [ "X$pid" = "X" ]
    then
        echo "$APP_LONG_NAME is not running."
        exit 1
    else
        echo "$APP_LONG_NAME is running ($pid)."
        exit 0
    fi
}

dump() {
    echo "Dumping $APP_LONG_NAME..."
    getpid
    if [ "X$pid" = "X" ]
    then
        echo "$APP_LONG_NAME was not running."

    else
        kill -3 $pid

        if [ $? -ne 0 ]
        then
            echo "Failed to dump $APP_LONG_NAME."
            exit 1
        else
            echo "Dumped $APP_LONG_NAME."
        fi
    fi
}

case "$1" in

    'console')
        checkUser $1 touchlock
        console
        ;;

    'start')
        checkUser $1 touchlock
        start
        ;;

    'stop')
        checkUser $1
        stopit
        ;;

    'restart')
        checkUser $1 touchlock
        stopit
        start
        ;;

    'status')
        checkUser $1
        status
        ;;

    'dump')
        checkUser $1
        dump
        ;;

    *)
        echo "Usage: $0 { console | start | stop | restart | status | dump }"
        exit 1
        ;;
esac

exit 0

Other ActiveMQ examples (source code examples)

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