play-dcep-distribution-etalis

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Installation of DCEP

DCEP is the complex event processor in PLAY. Our approach is based on declarative (logic) rules. We will bring this approach to the cloud creating a large-scale, elastic CEP service which dynamically adapts to fluctuating event frequencies.

DCEP is a native RDF event processor, which means RDF can be used directly for events and there is no need to model mappings to binary formats.

Dependencies

Tested on CentOS release 6.3 (Final) 64bit:

Runtime Requirements:

Java (>=1.6)

SWI Prolog (5.10.2/6.6.X )

yum install readline-devel libjpeg
cd /tmp
wget http://kojipkgs.fedoraproject.org/packages/pl/5.10.2/3.fc15/x86_64/pl-static-5.10.2-3.fc15.x86_64.rpm
wget http://kojipkgs.fedoraproject.org/packages/pl/5.10.2/3.fc15/x86_64/pl-jpl-5.10.2-3.fc15.x86_64.rpm
wget http://kojipkgs.fedoraproject.org/packages/pl/5.10.2/3.fc15/x86_64/pl-5.10.2-3.fc15.x86_64.rpm
rpm -i pl-*.rpm

Add --nodeps to the rpm command if there is a problem with an old version of libjpeg which is actually on your system already.

Add JPL library (libjpl.so) to $LD_LIBRARY_PATH (do this permanently by adding to /etc/profile.d/swipl.sh):

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/lib64/swipl-jpl:/usr/lib/

Virtuoso (>=6.1.7, optional)

I created an SRPM based on 6.1.6 myself using instructions from http://wiki.centos.org/HowTos/RebuildSRPM

# Install build dependencies as root:
sudo yum install gperf htmldoc pkgconfig pkgconfig mock libxml2-devel libiodbc-devel
sudo useradd -s /sbin/nologin mockbuild
# Build Virtuoso as non-root user:
mkdir -p ~/rpmbuild/{BUILD,RPMS,SOURCES,SPECS,SRPMS}
echo '%_topdir %(echo $HOME)/rpmbuild' > ~/.rpmmacros
rpm -i http://ftp.pbone.net/mirror/download.fedora.redhat.com/pub/fedora/linux/updates/16/SRPMS/virtuoso-opensource-6.1.6-1.fc16.src.rpm
# Replace content of tarball ~/rpmbuild/SOURCES with latest code from https://github.com/openlink/virtuoso-opensource branch develop/6 and then:
cd ~/rpmbuild/SPECS
rpmbuild -ba virtuoso-opensource.spec
cd ~/rpmbuild/RPMS/

# Install Virtuoso as root:
sudo rpm -Uvh */virtuoso-opensource-conductor-6.1.6*.rpm */virtuoso-opensource-6.1.6*.rpm */virtuoso-opensource-utils-6.1.6*.rpm

If the newer Virtuoso builds should appear e.g. in EPEL then the procedure becomes easier:

rpm -i http://ftp-stud.hs-esslingen.de/pub/epel/6/i386/epel-release-6-8.noarch.rpm
yum install virtuoso-opensource virtuoso-opensource-conductor virtuoso-opensource-utils

Use the init.d start script from here: RedHat, CentOS, Debian

chkconfig virtuoso on

4store (>=1.1.5, optional)

See http://4store.org/trac/wiki/Download or build 4store form source to get the newest bugfixes and SPARQL 1.1 features.

yum install mhash yajl mpfr redland rasqal avahi-glib
rpm --import http://repo.sparql.pro/RPM-GPG-KEY-SPARQL-PRO
rpm -Uvh http://repo.sparql.pro/centos/6/x86_64/4store-1.1.5-4.x86_64.rpm

• --nodeps can be added to the last command if the dependencies are not properly recognized.
• This might also be needed to fix the dependencies:

ln -s /usr/lib64/libyajl.so.2 /usr/lib64/libyajl.so.1
ln -s /usr/lib64/libmpfr.so.4 /usr/lib64/libmpfr.so.1

Build

To build DCEP in /tmp:

cd /tmp
git clone https://github.com/play-project/play-dcep.git
cd play-dcep/
mvn install -DskipTests

The installer package dcep-install.zip will be in /tmp/play-dcep/play-dcep-distribution/target/

Unpack/Configure

1. Download or build (see above) the file dcep-install.zip
2. Unzip
3. cd dcep
4. Edit conf/play-commons-constants.properties for endpoints where events can be received and sent. Adapt the file from these defaults: default properties
5. Edit conf/play-dcep-distribution.properties for startup behaviour. Adapt the file from these defaults: default properties

Run

1. Run bin/dcep start on Unix
2. The program can be terminated using bin/dcep stop
3. The log file can be found in log/dcep.log, see also README.logging.md