Re: Extra data on vertex

[Avery Ching]

Best way is to add it to the vertex value.  The vertex value is meant to 
store any data associated with a particular vertex.

Hope that helps,
Avery

On 5/7/13 7:47 AM, Ahmet Emre Aladağ wrote:
Hi,

1) What's the best way for storing extra data (such as URL) on a 
vertex? I thought this would be through a class variable but I could 
not find the way to access that variable from the neighbor.
For example I'd like to remove the duplicate edges going towards the 
nodes with the "same url" (Duplicate Removal phase of LinkRank). How 
can I learn my neighbor's url variable: targetUrl?

2) Is removing edges like this a valid approach?


public class LinkRankVertex extends Vertex<IntWritable, FloatWritable,
        NullWritable, FloatWritable> {

    public String url;
    public void removeDuplicateLinks() {
        int targetId;
        String targetUrl;

        Set<String> urls = new HashSet<String>();
        ArrayListEdges<IntWritable, NullWritable> edges = new 
ArrayListEdges<IntWritable, NullWritable>();

        for (Edge<IntWritable, NullWritable> edge : getEdges()) {
            targetId = edge.getTargetVertexId().get();
            targetUrl = ...??
            if (!urls.contains(targetUrl)) {
                urls.add(targetUrl);
                edges.add(edge);
            }
        }
        setEdges(edges);
    }
}

Thanks,
Emre.