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‎README.md

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README
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======
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This repository offers some simple project templates to get started with Graph databases. It will primarily focus on:
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+ [Tinkerpop 3](http://www.tinkerpop.com)
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+ [Neo4J](http://neo4j.com)
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+ [OrientDB](http://www.orientechnologies.com/orientdb)
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It you are going to use any information and/or artifacts of this repository, please be aware of the fact that
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+ You need a current version of Java installed (Java 7 or better). I highly recommend using Java 8!
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+ You need a current version of Maven 3 installed
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To test your Java version:
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````bash
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$ java -version
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java version "1.8.0_25"
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Java(TM) SE Runtime Environment (build 1.8.0_25-b17)
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Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)
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````
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To test your maven install (environment variable JAVA_HOME must be defined!):
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````bash
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$ echo $JAVA_HOME
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/usr/lib/jvm/java-8-oracle
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$ mvn --version
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Apache Maven 3.2.2 (45f7c06d68e745d05611f7fd14efb6594181933e; 2014-06-17T15:51:42+02:00)
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Maven home: /usr/share/maven/apache-maven-3.2.2
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Java version: 1.8.0_25, vendor: Oracle Corporation
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Java home: /usr/lib/jvm/jdk1.8.0_25/jre
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Default locale: en_US, platform encoding: UTF-8
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OS name: "linux", version: "3.13.0-39-generic", arch: "amd64", family: "unix"
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````
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or if your JAVA_HOME links to another Java version:
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````bash
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export JAVA_HOME=/usr/lib/jvm/java-8-oracle && mvn --version
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````
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‎orientdb-embedded-graph/README.md

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README
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======
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This Maven project can be used to start developing an embedded OrientDB 2.x Graph database.
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To build this project:
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````bash
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cd orientdb-embedded-graph/
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$ mvn clean install
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[INFO] Scanning for projects...
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[INFO]
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[INFO] ------------------------------------------------------------------------
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[INFO] Building orientdb-embedded-graph 1.0.0-SNAPSHOT
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[INFO] ------------------------------------------------------------------------
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...
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[INFO] ------------------------------------------------------------------------
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[INFO] BUILD SUCCESS
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[INFO] ------------------------------------------------------------------------
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[INFO] Total time: 2.046 s
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[INFO] Finished at: 2014-11-13T13:53:51+01:00
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[INFO] Final Memory: 16M/205M
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[INFO] ------------------------------------------------------------------------
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````
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Now you can you the example `Main` class
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````bash
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$ export JAVA_HOME=/usr/lib/jvm/java-8-oracle && mvn exec:java -Dexec.mainClass=eu.infomas.research.orientdb.Main
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````
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Both OrientDB and Maven report some warning, those warnings can be ignored.
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Finally you can check the result, using the OrientDB console (should be installed separately)
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````
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$ ./console.sh
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OrientDB console v.2.0-M2 (build UNKNOWN@r; 2014-09-29 21:06:32+0000) www.orientechnologies.com
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Type 'help' to display all the commands supported.
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Installing extensions for GREMLIN language v.2.6.0
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orientdb> connect plocal:/home/rmuller/orientdb/test admin admin
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Connecting to database [plocal:/home/rmuller/orientdb/test] with user 'admin'...OK
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orientdb {db=test}> select from V
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----+----+------+----+---------+-----------+--------+----+----------
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# |@RID|name |age |out_knows|out_created|in_knows|lang|in_created
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----+----+------+----+---------+-----------+--------+----+----------
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0 |#9:0|marko |29 |[size=2] |[size=1] |null |null|null
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1 |#9:1|vadas |27 |null |null |[size=1]|null|null
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2 |#9:2|lop |null|null |null |null |java|[size=3]
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3 |#9:3|josh |32 |null |[size=2] |[size=1]|null|null
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4 |#9:4|ripple|null|null |null |null |java|[size=1]
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5 |#9:5|peter |35 |null |[size=1] |null |null|null
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----+----+------+----+---------+-----------+--------+----+----------
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6 item(s) found. Query executed in 0.005 sec(s).
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````

‎orientdb-embedded-graph/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>eu.infomas.research</groupId>
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<artifactId>orientdb-embedded-graph</artifactId>
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<version>1.0.0-SNAPSHOT</version>
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<packaging>jar</packaging>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<maven.compiler.source>1.8</maven.compiler.source>
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<maven.compiler.target>1.8</maven.compiler.target>
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<orientdb.version>2.0-M2</orientdb.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>com.orientechnologies</groupId>
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<artifactId>orientdb-graphdb</artifactId>
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<version>${orientdb.version}</version>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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</plugins>
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</build>
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</project>
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‎orientdb-embedded-graph/src/main/java/eu/infomas/research/orientdb/Main.java

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package eu.infomas.research.orientdb;
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import com.tinkerpop.blueprints.Vertex;
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import com.tinkerpop.blueprints.impls.orient.OrientGraphFactory;
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import com.tinkerpop.blueprints.impls.orient.OrientGraphNoTx;
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/**
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* {@code Main}.
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*
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* @author <a href="mailto:[email protected]">Ronald K. Muller</a>
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*/
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public class Main {
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private static final String DB_DIR = System.getProperty("user.home") + "/orientdb/test";
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public static void main(String... args) {
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// start with a non existing database
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final OrientGraphFactory factory = new OrientGraphFactory(
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"plocal:" + DB_DIR, "admin", "admin");
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try {
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final OrientGraphNoTx g = factory.getNoTx();
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// database is now auto created
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// example from Tinkerpop 3 ()
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// Changed to be compatible with current OrientDB implementation
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Vertex marko = g.addVertex(null, "name", "marko", "age", 29);
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Vertex vadas = g.addVertex(null, "name", "vadas", "age", 27);
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Vertex lop = g.addVertex(null, "name", "lop", "lang", "java");
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Vertex josh = g.addVertex(null, "name", "josh", "age", 32);
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Vertex ripple = g.addVertex(null, "name", "ripple", "lang", "java");
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Vertex peter = g.addVertex(null, "name", "peter", "age", 35);
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marko.addEdge("knows", vadas).setProperty("weight", 0.5f);
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marko.addEdge("knows", josh).setProperty("weight", 1.0f);
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marko.addEdge("created", lop).setProperty("weight", 0.4f);
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josh.addEdge("created", ripple).setProperty("weight", 1.0f);
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josh.addEdge("created", lop).setProperty("weight", 0.4f);
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peter.addEdge("created", lop).setProperty("weight", 0.2f);
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} finally {
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// this also closes the OrientGraph instances created by the factory
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// Note that OrientGraphFactory does not implement Closeable
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factory.close();
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}
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}
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}

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