DatasetAccessResource.java

package com.oreilly.rdf.tenuki.jaxrs;

import java.sql.Connection;
import java.sql.SQLException;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;

import com.hp.hpl.jena.query.Dataset;
import com.hp.hpl.jena.sdb.SDBFactory;
import com.hp.hpl.jena.sdb.Store;
import com.hp.hpl.jena.sdb.StoreDesc;

public abstract class DatasetAccessResource {

	private DataSource dataSource;
	private StoreDesc storeDesc;
	private Connection connection;
	private Store store;
	private Dataset dataset;

	public Dataset getDataset() {
		return dataset;
	}

	public Store getStore() {
		return store;
	}

	@SuppressWarnings("unused")
	@PostConstruct
	private void myPostConstructMethod()

	{
		try {
			InitialContext ctx = new InitialContext();
			dataSource = (DataSource) ctx.lookup("jdbc/sdbDataSource");
			storeDesc = (StoreDesc) ctx.lookup("jdbc/sdbStoreDesc");
			connection = dataSource.getConnection();
		} catch (NamingException e) {
			throw new RuntimeException(e);
		} catch (SQLException e) {
			throw new RuntimeException(e);
		}
		dataset = SDBFactory.connectDataset(connection, storeDesc);
		store = SDBFactory.connectStore(connection, storeDesc);
	}

	@SuppressWarnings("unused")
	@PreDestroy
	private void myPreDestroyMethod() {
		try {
			dataset.close();
			store.close();
		} finally {
			try {
				connection.close();
			} catch (SQLException e) {
				throw new RuntimeException(e);
			}
		}
	}

}