com.facebook.presto.spi

Class FixedPageSource

java.lang.Object

com.facebook.presto.spi.FixedPageSource

All Implemented Interfaces:

ConnectorPageSource, Closeable, AutoCloseable

public class FixedPageSource
extends Object
implements ConnectorPageSource

Field Summary

Fields inherited from interface com.facebook.presto.spi.ConnectorPageSource

NOT_BLOCKED

Constructor Summary

Constructors

Constructor and Description
FixedPageSource(Iterable<Page> pages)

Method Summary

Modifier and Type	Method and Description
void	close() Immediately finishes this page source.
long	getCompletedBytes() Gets the number of input bytes processed by this page source so far.
long	getCompletedPositions() Gets the number of input rows processed by this page source so far.
Page	getNextPage() Gets the next page of data.
long	getReadTimeNanos() Gets the wall time this page source spent reading data from the input.
long	getSystemMemoryUsage() Get the total memory that needs to be reserved in the general memory pool.
boolean	isFinished() Will this page source product more pages?

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.facebook.presto.spi.ConnectorPageSource

getRuntimeStats, isBlocked

Constructor Detail

FixedPageSource

public FixedPageSource(Iterable<Page> pages)

Method Detail

close

public void close()
           throws IOException

Description copied from interface: ConnectorPageSource

Immediately finishes this page source. Presto will always call this method.

Specified by:

close in interface ConnectorPageSource

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException

getCompletedBytes

public long getCompletedBytes()

Description copied from interface: ConnectorPageSource

Gets the number of input bytes processed by this page source so far. If size is not available, this method should return zero.

Specified by:

getCompletedBytes in interface ConnectorPageSource

getCompletedPositions

public long getCompletedPositions()

Description copied from interface: ConnectorPageSource

Gets the number of input rows processed by this page source so far. If number is not available, this method should return zero.

Specified by:

getCompletedPositions in interface ConnectorPageSource

getReadTimeNanos

public long getReadTimeNanos()

Description copied from interface: ConnectorPageSource

Gets the wall time this page source spent reading data from the input. If read time is not available, this method should return zero.

Specified by:

getReadTimeNanos in interface ConnectorPageSource

isFinished

public boolean isFinished()

Description copied from interface: ConnectorPageSource

Will this page source product more pages?

Specified by:

isFinished in interface ConnectorPageSource

getNextPage

public Page getNextPage()

Description copied from interface: ConnectorPageSource

Gets the next page of data. This method is allowed to return null.

Specified by:

getNextPage in interface ConnectorPageSource

getSystemMemoryUsage

public long getSystemMemoryUsage()

Description copied from interface: ConnectorPageSource

Get the total memory that needs to be reserved in the general memory pool. This memory should include any buffers, etc. that are used for reading data.

Specified by:

getSystemMemoryUsage in interface ConnectorPageSource

Returns:

the memory used so far in table read