package voldemort.store.bdb.dataconversion;
import java.util.ArrayList;
import java.util.List;
import voldemort.store.StoreBinaryFormat;
import voldemort.utils.ByteUtils;
import voldemort.utils.FnvHashFunction;
import voldemort.utils.HashFunction;
import voldemort.versioning.VectorClock;
import voldemort.versioning.Versioned;
import com.sleepycat.je.DatabaseEntry;
import com.sleepycat.je.LockMode;
import com.sleepycat.je.OperationStatus;
public class BdbConvertBaseToPidScan extends AbstractBdbConversion {
BdbConvertBaseToPidScan(String storeName,
String clusterXmlPath,
String sourceEnvPath,
String destEnvPath,
int logFileSize,
int nodeMax) throws Exception {
super(storeName, clusterXmlPath, sourceEnvPath, destEnvPath, logFileSize, nodeMax);
}
@Override
public void transfer() throws Exception {
cursor = srcDB.openCursor(null, null);
DatabaseEntry keyEntry = new DatabaseEntry();
DatabaseEntry valueEntry = new DatabaseEntry();
byte[] prevKey = null;
List<Versioned<byte[]>> vals = new ArrayList<Versioned<byte[]>>();
HashFunction hash = new FnvHashFunction();
int totalPartitions = cluster.getNumberOfPartitions();
long startTime = System.currentTimeMillis();
int scanCount = 0;
int keyCount = 0;
while(cursor.getNext(keyEntry, valueEntry, LockMode.READ_UNCOMMITTED) == OperationStatus.SUCCESS) {
scanCount++;
if(scanCount % 1000000 == 0)
logger.info("Converted " + scanCount + " entries in "
+ (System.currentTimeMillis() - startTime) / 1000 + " secs");
// read the value as a versioned Object
VectorClock clock = new VectorClock(valueEntry.getData());
byte[] bytes = ByteUtils.copy(valueEntry.getData(),
clock.sizeInBytes(),
valueEntry.getData().length);
Versioned<byte[]> value = new Versioned<byte[]>(bytes, clock);
byte[] key = keyEntry.getData();
if(prevKey != null && (ByteUtils.compare(prevKey, key) != 0)) {
// there is a new key; write out the buffered values and
// previous key
int partition = BdbConvertData.abs(hash.hash(prevKey))
% (Math.max(1, totalPartitions));
OperationStatus putStatus = dstDB.put(null,
new DatabaseEntry(StoreBinaryFormat.makePrefixedKey(prevKey,
partition)),
new DatabaseEntry(StoreBinaryFormat.toByteArray(vals)));
if(OperationStatus.SUCCESS != putStatus) {
String errorStr = "Put failed with " + putStatus + " for key"
+ BdbConvertData.writeAsciiString(prevKey);
logger.error(errorStr);
throw new Exception(errorStr);
}
vals = new ArrayList<Versioned<byte[]>>();
keyCount++;
}
vals.add(value);
prevKey = key;
}
if(vals.size() > 0) {
int partition = BdbConvertData.abs(hash.hash(prevKey)) % (Math.max(1, totalPartitions));
OperationStatus putStatus = dstDB.put(null,
new DatabaseEntry(StoreBinaryFormat.makePrefixedKey(prevKey,
partition)),
new DatabaseEntry(StoreBinaryFormat.toByteArray(vals)));
if(OperationStatus.SUCCESS != putStatus) {
String errorStr = "Put failed with " + putStatus + " for key"
+ BdbConvertData.writeAsciiString(prevKey);
logger.error(errorStr);
throw new Exception(errorStr);
}
keyCount++;
}
logger.info("Completed " + scanCount + " entries and " + keyCount + " keys in "
+ (System.currentTimeMillis() - startTime) / 1000 + " secs");
}
@Override
public boolean areDuplicatesNeededForSrc() {
return true;
}
@Override
public boolean areDuplicatesNeededForDest() {
return false;
}
}