#Neo4j Graph Database
For more information, visit: http://neo4j.org/
Neo4j is built using Maven - http://maven.apache.org/
Maven 3 is now supported
For helping out improving Neo4j, check out the intro on contributing code.
At least as of Neo4j 1.7 and OpenJDK 1.7.0_147-icedtea, OpenJDK 7 is unable to build Neo4j with following error: java.lang.AssertionError: Missing type variable in where clause T. Please use JDK 6 (OpenJDK is fine) to build Neo4j.
In addition, you need to allow enough memory to the Maven build process, for example by adding before launching Maven:
export JAVA_OPTS='-Xms384M -Xmx512M -XX:MaxPermSize=256M' At least on OpenJDK 1.6.0_23, building Neo4j with the default settings throws misleading exceptions such as: (reproduced here for your information)
[ERROR] Specifications.java:[178,33] cannot find symbol symbol : method and(java.lang.Iterable<java.lang.Object>) location: class org.neo4j.helpers.Specifications [ERROR] Iterables.java:[342,63] <FROM,TO>map( org.neo4j.helpers.Function<? super FROM,? extends TO>, java.lang.Iterable<FROM>) in org.neo4j.helpers.collection.Iterables cannot be applied to (<anonymous org.neo4j.helpers.Function<java.lang.Iterable<T>, java.util.Iterator<T>>>,java.lang.Iterable<java.lang.Object>) git clone git://github.com/neo4j/community.git mvn clean install These instructions are for OS X, with https://github.com/mxcl/homebrew installed.
prepare the repo:
rm -rf ~/.m2/repository/org/neo4j mkdir build cd build build community:
git clone [email protected]:neo4j/community.git cd community git pull origin master mvn clean install -Dmaven.test.skip=true cd .. build advanced
git clone [email protected]:neo4j/advanced.git cd advanced git pull origin master mvn clean install -Dmaven.test.skip=true cd .. build enterprise
git clone [email protected]:neo4j/enterprise.git cd enterprise git pull origin master mvn clean install -Dmaven.test.skip=true cd .. install the ASCIIDOC toolchain
brew install docbook asciidoc w3m fop graphviz && sudo docbook-register build the manual
git clone [email protected]:neo4j/manual.git cd manual git pull origin master mvn clean install -Dmaven.test.skip=true cd .. Build the standalone distributions
git clone [email protected]:neo4j/packaging.git cd packaging git pull origin master cd standalone mvn clean package Have a look at the readme file in cypher/ for how to get that project to work in Eclipse IDE. If it isn't setup properly, other projects (submodules) that depend on it will not get built by Eclipse.