I'm using TitanGraphDB + Cassandra. I'm starting Titan as follows
cd titan-cassandra-0.3.1
bin/titan.sh config/titan-server-rexster.xml config/titan-server-cassandra.properties
I have a Rexster shell that I can use to communicate to Titan + Cassandra above.
cd rexster-console-2.3.0
bin/rexster-console.sh
I'm attempting to model a network topology using Titan Graph DB. I want to program the Titan Graph DB from my python program. I'm using bulbs package for that. I create five types of vertices
- switch
- port
- device
- flow
- flow_entry
I create edges between vertices that are connected logically. The edges are not labelled.
Let us say I want to test the connectivity between Vertex A and Vertex B
I have a groovy script is_connected.groovy
def isConnected (portA, portB) {
return portA.both().retain([portB]).hasNext()
}
Now from my rexster console
g = rexster.getGraph("graph")
==>titangraph[embeddedcassandra:null]
rexster[groovy]> g.V('type', 'flow')
==>v[116]
==>v[100]
rexster[groovy]> g.V('type', 'flow_entry')
==>v[120]
==>v[104]
As you can see above I have two vertices of type flow v[116] and v[100]
I have two vertices of type flow_entry v[120] and v[104]
I want to check for the connectivity between v[120] and v[116] for e.g
rexster[groovy]> ?e is_connected.groovy
==>null
rexster[groovy]> is_connected(g.v[116],g.v[120])
==>An error occurred while processing the script for language [groovy]. All transactions across all graphs in the session have been concluded with failure: java.util.concurrent.ExecutionException: javax.script.ScriptException: javax.script.ScriptException: groovy.lang.MissingPropertyException: No such property: v for class: com.thinkaurelius.titan.graphdb.database.StandardTitanGraph
Either I am doing something very wrong,or I am missing something obvious.It would be great if you could point me in the right direction.
This syntax is not valid groovy:
is_connected(g.v[116],g.v[120])
should be:
is_connected(g.v(116),g.v(120))