org.apache.calcite.adapter.druid

Class DruidConnectionImpl.BlockingQueueEnumerator<E>

java.lang.Object

org.apache.calcite.adapter.druid.DruidConnectionImpl.BlockingQueueEnumerator<E>

All Implemented Interfaces:

AutoCloseable, Enumerator<E>

Enclosing class:

DruidConnectionImpl

private static class DruidConnectionImpl.BlockingQueueEnumerator<E>
extends Object
implements Enumerator<E>

An Enumerator that gets its rows from a BlockingQueue. There are other fields to signal errors and end-of-data.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) AtomicBoolean	done
(package private) E	next
(package private) BlockingQueue<E>	queue
(package private) Holder<Throwable>	throwableHolder

Constructor Summary

Constructors

Modifier	Constructor and Description
private	BlockingQueueEnumerator()

Method Summary

Modifier and Type	Method and Description
void	close()
E	current()
boolean	moveNext()
void	reset()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

queue

final BlockingQueue<E> queue

done

final AtomicBoolean done

throwableHolder

final Holder<Throwable> throwableHolder

next

E next

Constructor Detail

BlockingQueueEnumerator

private BlockingQueueEnumerator()

Method Detail

current

public E current()

Specified by:

current in interface Enumerator<E>

moveNext

public boolean moveNext()

Specified by:

moveNext in interface Enumerator<E>

reset

public void reset()

Specified by:

reset in interface Enumerator<E>

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Enumerator<E>