Package org.apache.accumulo.core.file

Class FileOperations.ReaderBuilder

java.lang.Object

org.apache.accumulo.core.file.FileOperations.FileHelper

org.apache.accumulo.core.file.FileOperations.ReaderBuilder

All Implemented Interfaces:

FileOperations.ReaderTableConfiguration

Enclosing class:

FileOperations

public class FileOperations.ReaderBuilder
extends FileOperations.FileHelper
implements FileOperations.ReaderTableConfiguration

Options common to all FileOperations which perform reads.

Constructor Summary

Constructors

Constructor	Description
ReaderBuilder()

Method Summary

Modifier and Type	Method	Description
FileSKVIterator	build()	Execute the operation, constructing the specified file reader.
FileOperations.ReaderTableConfiguration	forFile(String filename, org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.conf.Configuration fsConf, CryptoService cs)
FileOperations.ReaderBuilder	seekToBeginning()	Seek the constructed iterator to the beginning of its domain before returning.
FileOperations.ReaderBuilder	seekToBeginning(boolean seekToBeginning)	If true, seek the constructed iterator to the beginning of its domain before returning.
FileOperations.ReaderBuilder	withBlockCache(BlockCache dataCache, BlockCache indexCache)	(Optional) Set the block cache pair to be used to optimize reads within the constructed reader.
FileOperations.ReaderBuilder	withDataCache(BlockCache dataCache)	(Optional) set the data cache to be used to optimize reads within the constructed reader.
FileOperations.ReaderBuilder	withFileLenCache(com.google.common.cache.Cache<String,Long> fileLenCache)
FileOperations.ReaderBuilder	withIndexCache(BlockCache indexCache)	(Optional) set the index cache to be used to optimize reads within the constructed reader.
FileOperations.ReaderBuilder	withRateLimiter(RateLimiter rateLimiter)
FileOperations.ReaderBuilder	withTableConfiguration(AccumuloConfiguration tableConfiguration)

Methods inherited from class org.apache.accumulo.core.file.FileOperations.FileHelper

cryptoService, filename, fs, fsConf, getTableConfiguration, rateLimiter, tableConfiguration, toIndexReaderBuilderOptions, toReaderBuilderOptions, toScanReaderBuilderOptions, toWriterBuilderOptions

Methods inherited from class java.lang.Object

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

Constructor Detail

ReaderBuilder

public ReaderBuilder()

Method Detail

forFile

public FileOperations.ReaderTableConfiguration forFile(String filename,
                                                       org.apache.hadoop.fs.FileSystem fs,
                                                       org.apache.hadoop.conf.Configuration fsConf,
                                                       CryptoService cs)

withTableConfiguration

public FileOperations.ReaderBuilder withTableConfiguration(AccumuloConfiguration tableConfiguration)

Specified by:

withTableConfiguration in interface FileOperations.ReaderTableConfiguration

withBlockCache

public FileOperations.ReaderBuilder withBlockCache(BlockCache dataCache,
                                                   BlockCache indexCache)

(Optional) Set the block cache pair to be used to optimize reads within the constructed reader.

withDataCache

public FileOperations.ReaderBuilder withDataCache(BlockCache dataCache)

(Optional) set the data cache to be used to optimize reads within the constructed reader.

withIndexCache

public FileOperations.ReaderBuilder withIndexCache(BlockCache indexCache)

(Optional) set the index cache to be used to optimize reads within the constructed reader.

withFileLenCache

public FileOperations.ReaderBuilder withFileLenCache(com.google.common.cache.Cache<String,Long> fileLenCache)

withRateLimiter

public FileOperations.ReaderBuilder withRateLimiter(RateLimiter rateLimiter)

seekToBeginning

public FileOperations.ReaderBuilder seekToBeginning()

Seek the constructed iterator to the beginning of its domain before returning. Equivalent to seekToBeginning(true).

seekToBeginning

public FileOperations.ReaderBuilder seekToBeginning(boolean seekToBeginning)

If true, seek the constructed iterator to the beginning of its domain before returning.

build

public FileSKVIterator build()
                      throws IOException

Execute the operation, constructing the specified file reader.

Throws:

IOException