system/kafka: Added (high-throughput distributed messaging system).

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

system/kafka/README

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+Apache Kafka is publish-subscribe messaging rethought as a 
+distributed commit log.
+
+Fast
+    A single Kafka broker can handle hundreds of megabytes 
+    of reads and writes per second from thousands of clients.
+
+Scalable
+    Kafka is designed to allow a single cluster to serve as 
+    the central data backbone for a large organization. It 
+    can be elastically and transparently expanded without 
+    downtime. Data streams are partitioned and spread over a 
+    cluster of machines to allow data streams larger than the 
+    capability of any single machine and to allow clusters of 
+    co-ordinated consumers
+
+Durable
+    Messages are persisted on disk and replicated within the 
+    cluster to prevent data loss. Each broker can handle 
+    terabytes of messages without performance impact.
+
+Distributed by Design
+    Kafka has a modern cluster-centric design that offers 
+    strong durability and fault-tolerance guarantees. 

system/kafka/doinst.sh

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+config() {
+  NEW="$1"
+  OLD="$(dirname $NEW)/$(basename $NEW .new)"
+  if [ ! -r $OLD ]; then
+    mv $NEW $OLD
+  elif [ "$(cat $OLD | md5sum)" = "$(cat $NEW | md5sum)" ]; then
+    rm $NEW
+  fi
+}
+
+preserve_perms() {
+  NEW="$1"
+  OLD="$(dirname $NEW)/$(basename $NEW .new)"
+  if [ -e $OLD ]; then
+    cp -a $OLD ${NEW}.incoming
+    cat $NEW > ${NEW}.incoming
+    mv ${NEW}.incoming $NEW
+  fi
+  config $NEW
+}
+
+preserve_perms etc/rc.d/rc.kafka.new
+preserve_perms etc/kafka/server.properties.new
+preserve_perms etc/kafka/consumer.properties.new
+preserve_perms etc/kafka/producer.properties.new
+preserve_perms etc/kafka/log4j.properties.new
+preserve_perms etc/kafka/test-log4j.properties.new
+preserve_perms etc/kafka/tools-log4j.properties.new
+preserve_perms etc/kafka/kafka-env.sh.new

system/kafka/kafka-env.sh

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+#! /bin/bash
+
+export KAFKA_HOME=@KAFKA_HOME@
+# KAFKA_OPTS=
+export LOG_DIR="/var/log/kafka/"
+export SCALA_BINARY_VERSION=2.11
+
+# JVM
+# export KAFKA_HEAP_OPTS="-Xmx1G -Xms1G"
+# export KAFKA_HEAP_OPTS="-Xmx256M"
+# export KAFKA_JVM_PERFORMANCE_OPTS="-server -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -XX:+CMSScavengeBeforeRemark -XX:+DisableExplicitGC -Djava.awt.headless=true"
+
+# JMX settings
+# export KAFKA_JMX_OPTS="-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false "
+
+# JMX port to use
+# export JMX_PORT=
+
+# Log4J
+export KAFKA_LOG4J_OPTS="-Dlog4j.configuration=file:/etc/kafka/log4j.properties"
+

system/kafka/kafka.SlackBuild

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+#!/bin/sh
+
+# Slackware build script for Apache Kafka
+
+# Copyright 2016 Andre Barboza - Belo Horizonte Brazil
+# All rights reserved.
+#
+# Redistribution and use of this script, with or without modification, is
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of this script must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
+#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
+#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+PRGNAM=kafka
+VERSION=${VERSION:-0.8.2.2}
+SCALA_VERSION=2.11
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+
+KAFKA_USER=${KAFKA_USER:-kafka}
+KAFKA_UID=${KAFKA_UID:-323}
+KAFKA_GROUP=${KAFKA_GROUP:-kafka}
+KAFKA_GID=${KAFKA_GID:-323}
+
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i486 ;;
+    arm*) ARCH=arm ;;
+       *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
+
+bailout() {
+  echo "  You must have a $KAFKA_USER user and $KAFKA_GROUP group to run this script. "
+  echo "  Something like this should suffice for most systems: "
+  echo "    # groupadd -g $KAFKA_GID $KAFKA_GROUP "
+  echo "    # useradd -u $KAFKA_UID -g $KAFKA_GID -c \"Apache Kafka user\" -d /var/lib/kafka -s /bin/sh $KAFKA_USER "
+  echo "  Giving /bin/sh as $KAFKA_USER shell is important as the init script will try tu 'su -' to it."
+  exit 1
+}
+
+# Bail if user and/or group isn't valid on your system
+# uid=319 is suggested to avoid conflicts with other SBo packages,
+# but it's your call: http://slackbuilds.org/uid_gid.txt
+if ! grep -q "^$KAFKA_USER:" /etc/passwd; then
+  bailout
+elif ! grep -q "^$KAFKA_GROUP:" /etc/group; then
+  bailout
+fi
+
+CWD=$(pwd)
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "x86_64" ]; then
+  LIBDIRSUFFIX="64"
+else
+  LIBDIRSUFFIX=""
+fi
+
+set -e 
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $PRGNAM-$VERSION
+tar xvf $CWD/${PRGNAM}_${SCALA_VERSION}-$VERSION.tgz
+cd ${PRGNAM}_${SCALA_VERSION}-$VERSION
+chown -R root:root .
+find -L . \
+ \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
+  -o -perm 511 \) -exec chmod 755 {} \; -o \
+ \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
+
+mkdir -p $PKG/usr/lib${LIBDIRSUFFIX}/$PRGNAM/{libs,bin}
+install -m 644 libs/*.jar $PKG/usr/lib${LIBDIRSUFFIX}/$PRGNAM/libs
+install -m 775 bin/*.sh $PKG/usr/lib${LIBDIRSUFFIX}/$PRGNAM/bin
+(
+  cd $PKG/usr/lib${LIBDIRSUFFIX}/$PRGNAM/bin
+  sed -i "s|^base_dir=.*|base_dir=/usr/lib$LIBDIRSUFFIX/$PRGNAM/|" kafka-run-class.sh
+  sed -i '0,/^$/{s_^$_\n. /etc/kafka/kafka-env.sh\n_}' *.sh
+)
+
+mkdir -p $PKG/usr/bin 
+(
+  cd $PKG/usr/bin
+  for script in $PKG/usr/lib${LIBDIRSUFFIX}/$PRGNAM/bin/kafka*
+  do
+    script_name=$(basename $script)
+    ln -s ../lib${LIBDIRSUFFIX}/$PRGNAM/bin/${script_name} 
+  done
+)
+
+install -dm 750 ${PKG}/var/{lib,log}/$PRGNAM
+chown -R $KAFKA_USER:$KAFKA_GROUP $PKG/var/{lib,log}/$PRGNAM
+
+install -dm 755 ${PKG}/etc/$PRGNAM
+install -m 644 config/server.properties $PKG/etc/$PRGNAM/server.properties.new
+install -m 644 config/consumer.properties $PKG/etc/$PRGNAM/consumer.properties.new
+install -m 644 config/producer.properties $PKG/etc/$PRGNAM/producer.properties.new
+install -m 644 config/log4j.properties $PKG/etc/$PRGNAM/log4j.properties.new
+install -m 644 config/test-log4j.properties $PKG/etc/$PRGNAM/test-log4j.properties.new
+install -m 644 config/tools-log4j.properties $PKG/etc/$PRGNAM/tools-log4j.properties.new
+install -m 644 $CWD/kafka-env.sh $PKG/etc/$PRGNAM/kafka-env.sh.new
+(
+  cd $PKG/etc/$PRGNAM
+  sed -i "s|^log.dirs=/tmp/kafka-logs$|log.dirs=/var/log/${PRGNAM}|" server.properties.new
+  sed -i "s|@KAFKA_HOME@|/usr/lib$LIBDIRSUFFIX/$PRGNAM|" kafka-env.sh.new
+)
+(
+  cd $PKG/usr/lib${LIBDIRSUFFIX}/$PRGNAM
+  ln -s /etc/kafka config
+)
+chown -R $KAFKA_USER:$KAFKA_GROUP $PKG/etc/$PRGNAM
+
+mkdir -p ${PKG}/etc/rc.d
+install -o root -g root -m 644 $CWD/rc.$PRGNAM $PKG/etc/rc.d/rc.${PRGNAM}.new
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a \
+  LICENSE NOTICE \
+  $PKG/usr/doc/$PRGNAM-$VERSION
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+cat $CWD/doinst.sh > $PKG/install/doinst.sh
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}

system/kafka/kafka.info

@@ -0,0 +1,10 @@
+PRGNAM="kafka"
+VERSION="0.8.2.2"
+HOMEPAGE="http://kafka.apache.org/"
+DOWNLOAD="http://www.us.apache.org/dist/kafka/0.8.2.2/kafka_2.11-0.8.2.2.tgz"
+MD5SUM="90f17dd1a3f91da3a233548c1df07381"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES="zookeeper"
+MAINTAINER="Andre Barboza"
+EMAIL="bmg.andre@gmail.com"

system/kafka/rc.kafka

@@ -0,0 +1,40 @@
+#!/bin/sh
+# Start/stop/restart Apache Zookeeper daemon
+
+SERVER_CONFIG=(server.properties)
+
+USER=kafka
+kafka_start(){
+  for conf in ${SERVER_CONFIG[@]}; do
+    sudo -u ${USER} sh -c "/usr/bin/kafka-server-start.sh -daemon /etc/kafka/${conf}"
+  done
+}
+
+kafka_stop() {
+  sudo -u ${USER} sh -c "/usr/bin/kafka-server-stop.sh"
+}
+
+kafka_restart() {
+  kafka_start
+  sleep 1
+  kafka_stop
+}
+
+print_usage() {
+  echo "usage $0 start|stop|restart"
+}
+
+case "$1" in
+  'start')
+    kafka_start
+    ;;
+  'stop')
+    kafka_stop
+    ;;
+  'restart')
+    kafka_restart
+    ;;
+  *)
+    print_usage
+    ;;
+esac

system/kafka/slack-desc

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+# HOW TO EDIT THIS FILE:
+# The "handy ruler" below makes it easier to edit a package description.
+# Line up the first '|' above the ':' following the base package name, and
+# the '|' on the right side marks the last column you can put a character in.
+# You must make exactly 11 lines for the formatting to be correct.  It's also
+# customary to leave one space after the ':' except on otherwise blank lines.
+
+     |-----handy-ruler------------------------------------------------------|
+kafka: kafka (A high-throughput distributed messaging system.)
+kafka:
+kafka: Apache Kafka is publish-subscribe messaging rethought as a 
+kafka: distributed commit log.  
+kafka: 
+kafka: Homepage: http://kafka.apache.org/
+kafka: 
+kafka:
+kafka: 
+kafka: 
+kafka: