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JenaDriver.java
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JenaDriver.java
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package cz.cvut.kbss.ontodriver.jena;
import cz.cvut.kbss.ontodriver.Closeable;
import cz.cvut.kbss.ontodriver.OntologyStorageProperties;
import cz.cvut.kbss.ontodriver.config.ConfigParam;
import cz.cvut.kbss.ontodriver.config.Configuration;
import cz.cvut.kbss.ontodriver.config.ConfigurationParameter;
import cz.cvut.kbss.ontodriver.exception.OntoDriverException;
import cz.cvut.kbss.ontodriver.jena.config.Constants;
import cz.cvut.kbss.ontodriver.jena.config.JenaConfigParam;
import cz.cvut.kbss.ontodriver.jena.config.JenaOntoDriverProperties;
import cz.cvut.kbss.ontodriver.jena.connector.ConnectorFactory;
import cz.cvut.kbss.ontodriver.jena.connector.ReadCommittedConnectorFactory;
import cz.cvut.kbss.ontodriver.jena.util.ConnectionListener;
import java.util.*;
public class JenaDriver implements Closeable, ConnectionListener {
private static final List<ConfigurationParameter> CONFIGS = Arrays
.asList(ConfigParam.AUTO_COMMIT, ConfigParam.ONTOLOGY_LANGUAGE,
JenaConfigParam.ISOLATION_STRATEGY, JenaConfigParam.STORAGE_TYPE);
private volatile boolean open;
private final Configuration configuration;
private final ConnectorFactory connectorFactory;
private final Set<JenaConnection> openConnections;
JenaDriver(OntologyStorageProperties storageProperties, Map<String, String> properties) {
assert properties != null;
this.configuration = new Configuration(storageProperties);
CONFIGS.stream().filter(c -> properties.containsKey(c.toString()))
.forEach(c -> configuration.setProperty(c, properties.get(c.toString())));
this.connectorFactory = buildConnectorFactory();
this.openConnections = Collections.synchronizedSet(new HashSet<>());
this.open = true;
}
private ConnectorFactory buildConnectorFactory() {
final String isolationStrategy = configuration
.getProperty(JenaConfigParam.ISOLATION_STRATEGY, Constants.DEFAULT_ISOLATION_STRATEGY);
switch (isolationStrategy) {
case JenaOntoDriverProperties.READ_COMMITTED:
return new ReadCommittedConnectorFactory(configuration);
default:
throw new IllegalArgumentException("Unsupported transaction isolation strategy " + isolationStrategy);
}
}
JenaConnection acquireConnection() {
final JenaAdapter adapter = new JenaAdapter(connectorFactory.createConnector());
final JenaConnection connection = new JenaConnection(adapter);
connection.registerListener(this);
openConnections.add(connection);
return connection;
}
@Override
public void connectionClosed(JenaConnection connection) {
openConnections.remove(connection);
}
@Override
public synchronized void close() throws OntoDriverException {
if (!open) {
return;
}
for (JenaConnection connection : openConnections) {
connection.close();
}
connectorFactory.close();
this.open = false;
}
@Override
public boolean isOpen() {
return open;
}
}