private ByteBuffer getPartitionKey(Map<String, ByteBuffer> keyColumns) {
ByteBuffer partitionKey;
if (partitionKeyColumns.size() > 1) {
ByteBuffer[] keys = new ByteBuffer[partitionKeyColumns.size()];
for (int i = 0; i < keys.length; i++)
keys[i] = keyColumns.get(partitionKeyColumns.get(i).getName());
partitionKey = CompositeType.build(keys);
} else {
partitionKey = keyColumns.get(partitionKeyColumns.get(0).getName());
}
return partitionKey;
}
@Test
public void executePreparedCounterTest() throws Exception {
PreparedStatement p = session.prepare("UPDATE " + COUNTER_TABLE + " SET c = c + ? WHERE k = ?");
session.execute(p.bind(1L, "row"));
session.execute(p.bind(1L, "row"));
ResultSet rs = session.execute("SELECT * FROM " + COUNTER_TABLE);
List<Row> rows = rs.all();
assertEquals(1, rows.size());
assertEquals(2L, rows.get(0).getLong("c"));
}
/** Loops collecting cql binded variable values from the queue and sending to Cassandra */
public void run() {
outer:
while (run || !queue.isEmpty()) {
List<ByteBuffer> bindVariables;
try {
bindVariables = queue.take();
} catch (InterruptedException e) {
// re-check loop condition after interrupt
continue;
}
ListIterator<InetAddress> iter = endpoints.listIterator();
while (true) {
// send the mutation to the last-used endpoint. first time through, this will NPE
// harmlessly.
try {
int i = 0;
PreparedStatement statement = preparedStatement(client);
while (bindVariables != null) {
BoundStatement boundStatement = new BoundStatement(statement);
for (int columnPosition = 0;
columnPosition < bindVariables.size();
columnPosition++) {
boundStatement.setBytesUnsafe(columnPosition, bindVariables.get(columnPosition));
}
client.execute(boundStatement);
i++;
if (i >= batchThreshold) break;
bindVariables = queue.poll();
}
break;
} catch (Exception e) {
closeInternal();
if (!iter.hasNext()) {
lastException = new IOException(e);
break outer;
}
}
// attempt to connect to a different endpoint
try {
InetAddress address = iter.next();
String host = address.getHostName();
client = CqlConfigHelper.getOutputCluster(host, conf).connect();
} catch (Exception e) {
// If connection died due to Interrupt, just try connecting to the endpoint again.
// There are too many ways for the Thread.interrupted() state to be cleared, so
// we can't rely on that here. Until the java driver gives us a better way of knowing
// that this exception came from an InterruptedException, this is the best solution.
if (canRetryDriverConnection(e)) {
iter.previous();
}
closeInternal();
// Most exceptions mean something unexpected went wrong to that endpoint, so
// we should try again to another. Other exceptions (auth or invalid request) are
// fatal.
if ((e instanceof AuthenticationException || e instanceof InvalidQueryException)
|| !iter.hasNext()) {
lastException = new IOException(e);
break outer;
}
}
}
}
// close all our connections once we are done.
closeInternal();
}