Example16b. Generate Data sampling for the dataset in the Oracle NoSQL Database

This uses analyze method in the OracleDatasetGraphNoSql class to generate data sampling from the dataset. In this example, data sampling is generated using a sampling rate with respect to all triples/quads stored in the dataset.

import org.openjena.riot.Lang;
import oracle.rdf.kv.client.jena.*;

public class Example16b
  public static void main(String[] args) throws Exception
String szStoreName  = args[0];
String szHostName   = args[1];
String szHostPort   = args[2];
double iSampRate = Double.parseDouble(args[3]); 
// Create Oracle NoSQL connection    
OracleNoSqlConnection conn 
       = OracleNoSqlConnection.createInstance(szStoreName,
// Create an Oracle DatasetGraphNoSql object to manage 
// the dataset in the Oracle NoSQL Database
OracleGraphNoSql graph = new OracleGraphNoSql(conn);
DatasetGraphNoSql datasetGraph = DatasetGraphNoSql.createFrom(graph);
// Close graph as it is no longer needed

// Clear dataset and close it as it is needed just to clear the 
// dataset
// Load data from file into the Oracle NoSQL Database
DatasetGraphNoSql.load("family.rdf", Lang.RDFXML, conn, 
// Analyze the default graph and generate sampling data
long sizeSamp = datasetGraph.analyze(iSampRate);
System.out.println("sampling size is " + sizeSamp);
// Close connection    

The following are the commands to compile and run this example, as well as the expected output of the java command.

javac -classpath ./:./jena-core-2.7.4.jar:./jena-arq-2.9.4.jar: \
./sdordfnosqlclient.jar:./kvclient.jar:./xercesImpl-2.10.0.jar: \
./slf4j-api-1.6.4.jar:./slf4j-log4j12-1.6.4.jar:./log4j/1.2.16.jar: \
./jena-iri-0.9.4.jar:./xml-apis-1.4.01.jar Example16.java

javac -classpath ./:./jena-core-2.7.4.jar:./jena-arq-2.9.4.jar: \
./sdordfnosqlclient.jar:./kvclient.jar:./xercesImpl-2.10.0.jar: \
./slf4j-api-1.6.4.jar:./slf4j-log4j12-1.6.4.jar:./log4j/1.2.16.jar: \
./jena-iri-0.9.4.jar:./xml-apis-1.4.01.jar Example16b <store_name>\
<host_name> <host_port> 0.005

sampling size is 5