simpledb.parallel

Class Exchange

java.lang.Object

simpledb.Operator

simpledb.parallel.Exchange

All Implemented Interfaces:

java.io.Serializable, DbIterator

Direct Known Subclasses:

Consumer, Producer

public abstract class Exchange
extends Operator

The exchange operator, which will be used in implementing parallel simpledb.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Exchange.ParallelOperatorID The identifier of exchange operators.

Field Summary

Fields

Modifier and Type	Field and Description
protected Exchange.ParallelOperatorID	operatorID
private static long	serialVersionUID

Constructor Summary

Constructors

Constructor and Description
Exchange(Exchange.ParallelOperatorID oID)

Method Summary

Methods

Modifier and Type	Method and Description
abstract java.lang.String	getName() Return the name of the exchange, used only to display the operator in the operator tree
Exchange.ParallelOperatorID	getOperatorID()

Methods inherited from class simpledb.Operator

close, fetchNext, getChildren, getEstimatedCardinality, getTupleDesc, hasNext, next, open, setChildren, setEstimatedCardinality

Methods inherited from class java.lang.Object

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

Methods inherited from interface simpledb.DbIterator

rewind

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

operatorID

protected final Exchange.ParallelOperatorID operatorID

Constructor Detail

Exchange

public Exchange(Exchange.ParallelOperatorID oID)

Method Detail

getOperatorID

public Exchange.ParallelOperatorID getOperatorID()

getName

public abstract java.lang.String getName()

Return the name of the exchange, used only to display the operator in the operator tree