Hi,
I have some code that works fine prior to 2.2.0 M2, but failed with the
following error:
Exception in thread "main" java.lang.UnsupportedOperationException: No
query engine installed.
at
org.neo4j.kernel.impl.query.NoQueryEngine.noQueryEngine(NoQueryEngine.java:56)
at
org.neo4j.kernel.impl.query.NoQueryEngine.executeQuery(NoQueryEngine.java:33)
at
org.neo4j.kernel.InternalAbstractGraphDatabase.execute(InternalAbstractGraphDatabase.java:935)
at
org.neo4j.kernel.InternalAbstractGraphDatabase.execute(InternalAbstractGraphDatabase.java:926)
The code is the following:
graphDb = new GraphDatabaseFactory()
.newEmbeddedDatabaseBuilder(neo4jDbLocation)
.loadPropertiesFromFile(neo4jConfigFile)
.newGraphDatabase();
String cypher = "CREATE CONSTRAINT ON (s:" + nodeLabel + ") ASSERT s." +
nodeKey + " IS UNIQUE";
Result result = graphDb.execute(cypher);
(minus the transaction, db close code).
It failed at the last line.
My maven has
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j</artifactId>
<version>2.2.0-M02</version>
</dependency>
Any help is appreciated. Google doesn't help at all with this error, so I
guess this is something new in 2.2.0?
Thanks,
Rick
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