org.apache.druid.query.operator

Interface Operator.Receiver

Enclosing interface:

Operator

public static interface Operator.Receiver

Method Summary

Modifier and Type	Method and Description
void	completed() Used to indicate that no more data will ever come.
Operator.Signal	push(RowsAndColumns rac) Used to push data.

Method Detail

push

Operator.Signal push(RowsAndColumns rac)

Used to push data. Return value indicates if more data will be accepted. If false, push should not be called anymore. If push is called after it returned false, undefined things will happen.

Parameters:

rac - RowsAndColumns of data

Returns:

a boolean value indicating if more data will be accepted. If false, push should never be called anymore

completed

void completed()

Used to indicate that no more data will ever come. This is only used during the happy path and is not equivalent to a Closeable.close() method. Namely, there is no guarantee that this method will be called if execution halts due to an exception from push.

It is acceptable for an implementation to eagerly close resources from this method, but it is not acceptable for this method to be the sole method of managing the lifecycle of resources held by the Operator.