Examples with ReservoirItemsUnion com.yahoo.sketches.sampling.ReservoirItemsUnion used on opensource projects

Example 1 with ReservoirItemsUnion

use of com.yahoo.sketches.sampling.ReservoirItemsUnion in project Gaffer by gchq.

the class LoadAndQuery12 method run.

public Iterable<Entity> run() throws OperationException {
    // [user] Create a user
    // ---------------------------------------------------------
    final User user = new User("user01");
    // ---------------------------------------------------------
    // [graph] create a graph using our schema and store properties
    // ---------------------------------------------------------
    final Graph graph = new Graph.Builder().addSchemas(getSchemas()).storeProperties(getStoreProperties()).build();
    // ---------------------------------------------------------
    // [add] add the edges to the graph
    // ---------------------------------------------------------
    final Set<String> dummyData = Collections.singleton("");
    final OperationChain addOpChain = new OperationChain.Builder().first(new GenerateElements.Builder<String>().generator(new DataGenerator12()).objects(dummyData).build()).then(new AddElements()).build();
    graph.execute(addOpChain, user);
    // ---------------------------------------------------------
    log("Added the edge A-B 1000 times each time with a ReservoirItemsUnion<String> containing a random string." + " Also added 500 edges X-Y0, X-Y1, ..., X-Y499 each and for each an Entity on X with a" + " ReservoirItemsUnion<String> containing the destination node.");
    // [get red edge] Get the red edge
    // ---------------------------------------------------------
    final GetAllEdges getAllEdges = new GetAllEdges.Builder().view(new View.Builder().edge("red").build()).build();
    final Iterable<Edge> allEdges = graph.execute(getAllEdges, user);
    // ---------------------------------------------------------
    log("\nThe red edge A-B:");
    for (final Edge edge : allEdges) {
        log("GET_A-B_EDGE_RESULT", edge.toString());
    }
    // [get strings sample from the red edge] Get the edge A-B and print out the sample of strings
    // ---------------------------------------------------------
    final GetEdges<EdgeSeed> query = new GetEdges.Builder<EdgeSeed>().addSeed(new EdgeSeed("A", "B", false)).build();
    final Iterable<Edge> edges = graph.execute(query, user);
    final Edge edge = edges.iterator().next();
    final ReservoirItemsSketch<String> stringsSketch = ((ReservoirItemsUnion<String>) edge.getProperty("stringsSample")).getResult();
    final String[] samples = stringsSketch.getSamples();
    final StringBuilder sb = new StringBuilder("10 samples: ");
    for (int i = 0; i < 10 && i < samples.length; i++) {
        if (i > 0) {
            sb.append(", ");
        }
        sb.append(samples[i]);
    }
    // ---------------------------------------------------------
    log("\nEdge A-B with a sample of the strings");
    log("GET_SAMPLE_FOR_RED_EDGE", sb.toString());
    // [get sample from the blue entity] Get the entity Y and print a sample of the neighbours
    // ---------------------------------------------------------
    final GetEntities<EntitySeed> query2 = new GetEntities.Builder<EntitySeed>().addSeed(new EntitySeed("X")).build();
    final Iterable<Entity> entities = graph.execute(query2, user);
    final Entity entity = entities.iterator().next();
    final ReservoirItemsSketch<String> neighboursSketch = ((ReservoirItemsUnion<String>) entity.getProperty("neighboursSample")).getResult();
    final String[] neighboursSample = neighboursSketch.getSamples();
    sb.setLength(0);
    sb.append("10 samples: ");
    for (int i = 0; i < 10 && i < neighboursSample.length; i++) {
        if (i > 0) {
            sb.append(", ");
        }
        sb.append(neighboursSample[i]);
    }
    // ---------------------------------------------------------
    log("\nEntity for vertex X with a sample of its neighbouring vertices");
    log("GET_SAMPLES_FOR_X_RESULT", sb.toString());
    return null;
}