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* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.resource.adapter.cassandra;
import java.util.List;
import java.util.Set;
import javax.resource.ResourceException;
import org.teiid.logging.LogConstants;
import org.teiid.logging.LogManager;
import org.teiid.resource.spi.BasicConnection;
import org.teiid.translator.cassandra.CassandraConnection;
import com.datastax.driver.core.*;
/**
* Represents a connection to Cassandra database.
* */
public class CassandraConnectionImpl extends BasicConnection implements CassandraConnection{
private CassandraManagedConnectionFactory config;
private Cluster cluster = null;
private Session session = null;
private Metadata metadata = null;
private VersionNumber version;
public CassandraConnectionImpl(CassandraManagedConnectionFactory config, Metadata metadata) {
this.config = config;
this.metadata = metadata;
}
public CassandraConnectionImpl(CassandraManagedConnectionFactory config) {
this.config = config;
Cluster.Builder builder = Cluster.builder().addContactPoint(config.getAddress());
if (this.config.getUsername() != null) {
builder.withCredentials(this.config.getUsername(), this.config.getPassword());
}
if (this.config.getPort() != null) {
builder.withPort(this.config.getPort());
}
this.cluster = builder.build();
this.metadata = cluster.getMetadata();
this.session = cluster.connect(config.getKeyspace());
Set<Host> allHosts = cluster.getMetadata().getAllHosts();
if (!allHosts.isEmpty()) {
Host host = allHosts.iterator().next();
this.version = host.getCassandraVersion();
}
}
@Override
public void close() throws ResourceException {
if(cluster != null){
cluster.close();
}
LogManager.logDetail(LogConstants.CTX_CONNECTOR, CassandraManagedConnectionFactory.UTIL.getString("shutting_down")); //$NON-NLS-1$
}
@Override
public boolean isAlive() {
LogManager.logDetail(LogConstants.CTX_CONNECTOR, CassandraManagedConnectionFactory.UTIL.getString("alive")); //$NON-NLS-1$
return true;
}
@Override
public ResultSetFuture executeQuery(String query){
return session.executeAsync(query);
}
@Override
public ResultSetFuture executeBatch(List<String> updates){
BatchStatement bs = new BatchStatement();
for (String update : updates) {
bs.add(new SimpleStatement(update));
}
return session.executeAsync(bs);
}
@Override
public ResultSetFuture executeBatch(String update, List<Object[]> values) {
PreparedStatement ps = session.prepare(update);
BatchStatement bs = new BatchStatement();
for (Object[] bindValues : values) {
BoundStatement bound = ps.bind(bindValues);
bs.add(bound);
}
return session.executeAsync(bs);
}
@Override
public KeyspaceMetadata keyspaceInfo() throws ResourceException {
String keyspace = config.getKeyspace();
KeyspaceMetadata result = metadata.getKeyspace(keyspace);
if (result == null && keyspace.length() > 2 && keyspace.charAt(0) == '"' && keyspace.charAt(keyspace.length() - 1) == '"') {
//try unquoted
keyspace = keyspace.substring(1, keyspace.length() - 1);
result = metadata.getKeyspace(keyspace);
}
if (result == null) {
throw new ResourceException(keyspace);
}
return result;
}
@Override
public VersionNumber getVersion() {
return version;
}
}