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Setup
The following explains which software is required for the Gradoop tutorial.
For the Gradoop-Tutorial java 8 is required. Install Java 8 (Unix). For Windows installation see here.
sudo apt install openjdk-8-jdk
Check Java Version:
java -version
The output should be something like:
openjdk version "1.8.0_265"
If multiple Java versions are installed just change the java default (Unix):
sudo update-alternatives --config java
The output of this command looks like this:
There are 2 choices for the alternative java (providing /usr/bin/java).
Selection Path Priority Status
------------------------------------------------------------
0 /usr/lib/jvm/java-11-oracle/bin/java 1062 auto mode
* 1 /usr/lib/jvm/java-8-openjdk/jre/bin/java 1061 manual mode
2 /usr/lib/jvm/java-8-oracle/bin/java 1062 manual mode
Press enter to keep the current choice[*], or type selection number:
Installation of maven 3 (Unix). For Windows installation see here.
sudo apt install maven
Check maven version:
mvn -version
Output should look like this:
Apache Maven 3.6.3
Maven home: /usr/share/maven
Java version: 1.8.0_265, vendor: Private Build, runtime: /usr/lib/jvm/java-8-openjdk-amd64/jre
To visualize the results of our task, we use the .dot format that is supported by Graphviz.
We prefer to install the tool.
sudo apt install graphviz
An alternative is the Online GraphViz tool here where you can paste the content of our generated dot files.
First clone the git gradoop-tutorial repository.
git clone https://github.com/dbs-leipzig/gradoop-tutorial.git
Execute our Hello World example class.
mvn exec:java -Dexec.mainClass="org.gradoop.tutorial.HelloWorld" -Dexec.cleanupDaemonThreads=false