package org.infinispan.client.hotrod.impl.operations;
import net.jcip.annotations.Immutable;
import org.infinispan.client.hotrod.Flag;
import org.infinispan.client.hotrod.impl.BinaryVersionedValue;
import org.infinispan.client.hotrod.impl.transport.Transport;
import org.infinispan.client.hotrod.impl.transport.TransportFactory;
import org.infinispan.util.logging.Log;
import org.infinispan.util.logging.LogFactory;
import java.util.concurrent.atomic.AtomicInteger;
/**
* Corresponds to getWithVersion operation as described by
* <a href="http://community.jboss.org/wiki/HotRodProtocol">Hot Rod protocol specification</a>.
*
* @author Mircea.Markus@jboss.com
* @since 4.1
*/
@Immutable
public class GetWithVersionOperation extends AbstractKeyOperation {
private static Log log = LogFactory.getLog(GetWithVersionOperation.class);
public GetWithVersionOperation(TransportFactory transportFactory, byte[] key, byte[] cacheName,
AtomicInteger topologyId, Flag[] flags) {
super(transportFactory, key, cacheName, topologyId, flags);
}
@Override
protected Object executeOperation(Transport transport) {
short status = sendKeyOperation(key, transport, GET_WITH_VERSION, GET_WITH_VERSION_RESPONSE);
Object result = null;
if (status == KEY_DOES_NOT_EXIST_STATUS) {
result = null;
} else if (status == NO_ERROR_STATUS) {
long version = transport.readLong();
if (log.isTraceEnabled()) {
log.trace("Received version: " + version);
}
byte[] value = transport.readArray();
result = new BinaryVersionedValue(version, value);
}
return result;
}
}