protected AbstractColumnFamilyRecordWriter(Configuration conf) {
this.conf = conf;
this.ringCache = new RingCache(conf);
this.queueSize =
conf.getInt(
AbstractColumnFamilyOutputFormat.QUEUE_SIZE, 32 * FBUtilities.getAvailableProcessors());
batchThreshold = conf.getLong(AbstractColumnFamilyOutputFormat.BATCH_THRESHOLD, 32);
consistencyLevel = ConsistencyLevel.valueOf(ConfigHelper.getWriteConsistencyLevel(conf));
}
/**
* Executes the provided query asynchronously.
*
* <p>This method does not block. It returns as soon as the query has been passed to the
* underlying network stack. In particular, returning from this method does not guarantee that the
* query is valid or has even been submitted to a live node. Any exception pertaining to the
* failure of the query will be thrown when accessing the {@link ResultSetFuture}.
*
* <p>Note that for queries that doesn't return a result (INSERT, UPDATE and DELETE), you will
* need to access the ResultSetFuture (that is call one of its get method to make sure the query
* was successful.
*
* @param query the CQL query to execute (that can be either a {@code Statement} or a {@code
* BoundStatement}). If it is a {@code BoundStatement}, all variables must have been bound
* (the statement must be ready).
* @return a future on the result of the query.
* @throws IllegalStateException if {@code query} is a {@code BoundStatement} but {@code
* !query.isReady()}.
*/
public ResultSetFuture executeAsync(Query query) {
if (query instanceof Statement) {
return manager.executeQuery(
new QueryMessage(
((Statement) query).getQueryString(),
ConsistencyLevel.toCassandraCL(query.getConsistencyLevel())),
query);
} else {
assert query instanceof BoundStatement : query;
BoundStatement bs = (BoundStatement) query;
return manager.executeQuery(
new ExecuteMessage(
bs.statement.id,
Arrays.asList(bs.values),
ConsistencyLevel.toCassandraCL(query.getConsistencyLevel())),
query);
}
}
/**
* Execute the provided query asynchronously.
*
* <p>This method does not block. It returns as soon as the query has been successfully sent to a
* Cassandra node. In particular, returning from this method does not guarantee that the query is
* valid. Any exception pertaining to the failure of the query will be thrown by the first access
* to the {@link ResultSet}.
*
* <p>Note that for queries that doesn't return a result (INSERT, UPDATE and DELETE), you will
* need to access the ResultSet (i.e. call any of its method) to make sure the query was
* successful.
*
* @param query the CQL query to execute (that can be either a {@code Statement} or a {@code
* BoundStatement}). If it is a {@code BoundStatement}, all variables must have been bound
* (the statement must be ready).
* @return a future on the result of the query.
* @throws IllegalStateException if {@code query} is a {@code BoundStatement} but {@code
* !query.isReady()}.
*/
public ResultSetFuture executeAsync(Query query) {
if (query instanceof Statement) {
return manager.executeQuery(
new QueryMessage(
((Statement) query).getQueryString(),
ConsistencyLevel.toCassandraCL(query.getConsistencyLevel())),
query);
} else {
assert query instanceof BoundStatement : query;
BoundStatement bs = (BoundStatement) query;
if (!bs.isReady())
throw new IllegalStateException(
"Some bind variables haven't been bound in the provided statement");
return manager.executeQuery(
new ExecuteMessage(
bs.statement.id,
Arrays.asList(bs.values),
ConsistencyLevel.toCassandraCL(query.getConsistencyLevel())),
query);
}
}