Package net.snowflake.client.jdbc

Class SnowflakeChunkDownloader

java.lang.Object

net.snowflake.client.jdbc.SnowflakeChunkDownloader

All Implemented Interfaces:

ChunkDownloader

public class SnowflakeChunkDownloader
extends Object
implements ChunkDownloader

Class for managing async download of offline result chunks

Created by jhuang on 11/12/14.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SnowflakeChunkDownloader.NoOpChunkDownloader	This is a No Operation chunk downloader to avoid potential null pointer exception

Constructor Summary

Constructors

Constructor	Description
SnowflakeChunkDownloader(SnowflakeResultSetSerializableV1 resultSetSerializable)	Constructor to initialize downloader, which uses the default stream provider

Method Summary

Modifier and Type	Method	Description
HttpClientSettingsKey	getHttpClientSettingsKey()
SnowflakeResultChunk	getNextChunkToConsume()	The method does the following:
OCSPMode	getOCSPMode()
ResultStreamProvider	getResultStreamProvider()
DownloaderMetrics	terminate()	terminate the downloader

Methods inherited from class java.lang.Object

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

Constructor Detail

SnowflakeChunkDownloader

public SnowflakeChunkDownloader(SnowflakeResultSetSerializableV1 resultSetSerializable)
                         throws SnowflakeSQLException

Constructor to initialize downloader, which uses the default stream provider

Parameters:

resultSetSerializable - the result set serializable object which includes required metadata to start chunk downloader

Throws:

SnowflakeSQLException

Method Detail

getOCSPMode

public OCSPMode getOCSPMode()

getHttpClientSettingsKey

public HttpClientSettingsKey getHttpClientSettingsKey()

getResultStreamProvider

public ResultStreamProvider getResultStreamProvider()

getNextChunkToConsume

public SnowflakeResultChunk getNextChunkToConsume()
                                           throws InterruptedException,
                                                  SnowflakeSQLException

The method does the following:

1. free the previous chunk data and submit a new chunk to be downloaded

2. get next chunk to consume, if it is not ready for consumption, it waits until it is ready

Specified by:

getNextChunkToConsume in interface ChunkDownloader

Returns:

next SnowflakeResultChunk to be consumed

Throws:

InterruptedException - if downloading thread was interrupted

SnowflakeSQLException - if downloader encountered an error

terminate

public DownloaderMetrics terminate()
                            throws InterruptedException

terminate the downloader

Specified by:

terminate in interface ChunkDownloader

Returns:

chunk downloader metrics collected over instance lifetime

Throws:

InterruptedException