org.apache.accumulo.core.file.map

Class MapFileOperations

java.lang.Object

org.apache.accumulo.core.file.FileOperations

org.apache.accumulo.core.file.map.MapFileOperations

public class MapFileOperations
extends FileOperations

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MapFileOperations.RangeIterator

Constructor Summary

Constructors

Constructor and Description
MapFileOperations()

Method Summary

Methods

Modifier and Type	Method and Description
long	getFileSize(String file, org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.conf.Configuration conf, AccumuloConfiguration acuconf)
FileSKVIterator	openIndex(String file, org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.conf.Configuration conf, AccumuloConfiguration acuconf)
FileSKVIterator	openIndex(String file, org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.conf.Configuration conf, AccumuloConfiguration acuconf, BlockCache dCache, BlockCache iCache)
FileSKVIterator	openReader(String file, boolean seekToBeginning, org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.conf.Configuration conf, AccumuloConfiguration acuconf) Open a reader that fully support seeking and also enable any optimizations related to seeking, like bloom filters.
FileSKVIterator	openReader(String file, boolean seekToBeginning, org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.conf.Configuration conf, AccumuloConfiguration acuconf, BlockCache dataCache, BlockCache indexCache)
FileSKVIterator	openReader(String file, Range range, Set<ByteSequence> columnFamilies, boolean inclusive, org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.conf.Configuration conf, AccumuloConfiguration tableConf) Open a reader that will not be seeked giving an initial seek location.
FileSKVIterator	openReader(String file, Range range, Set<ByteSequence> columnFamilies, boolean inclusive, org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.conf.Configuration conf, AccumuloConfiguration tableConf, BlockCache dataCache, BlockCache indexCache)
FileSKVWriter	openWriter(String file, org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.conf.Configuration conf, AccumuloConfiguration acuconf)

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

getInstance, getNewFileExtension, getValidExtensions

Methods inherited from class java.lang.Object

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

Constructor Detail

MapFileOperations

public MapFileOperations()

Method Detail

openReader

public FileSKVIterator openReader(String file,
                         boolean seekToBeginning,
                         org.apache.hadoop.fs.FileSystem fs,
                         org.apache.hadoop.conf.Configuration conf,
                         AccumuloConfiguration acuconf)
                           throws IOException

Description copied from class: FileOperations

Open a reader that fully support seeking and also enable any optimizations related to seeking, like bloom filters.

Specified by:

openReader in class FileOperations

Throws:

IOException

openWriter

public FileSKVWriter openWriter(String file,
                       org.apache.hadoop.fs.FileSystem fs,
                       org.apache.hadoop.conf.Configuration conf,
                       AccumuloConfiguration acuconf)
                         throws IOException

Specified by:

openWriter in class FileOperations

Throws:

IOException

openIndex

public FileSKVIterator openIndex(String file,
                        org.apache.hadoop.fs.FileSystem fs,
                        org.apache.hadoop.conf.Configuration conf,
                        AccumuloConfiguration acuconf)
                          throws IOException

Specified by:

openIndex in class FileOperations

Throws:

IOException

getFileSize

public long getFileSize(String file,
               org.apache.hadoop.fs.FileSystem fs,
               org.apache.hadoop.conf.Configuration conf,
               AccumuloConfiguration acuconf)
                 throws IOException

Specified by:

getFileSize in class FileOperations

Throws:

IOException

openReader

public FileSKVIterator openReader(String file,
                         Range range,
                         Set<ByteSequence> columnFamilies,
                         boolean inclusive,
                         org.apache.hadoop.fs.FileSystem fs,
                         org.apache.hadoop.conf.Configuration conf,
                         AccumuloConfiguration tableConf)
                           throws IOException

Description copied from class: FileOperations

Open a reader that will not be seeked giving an initial seek location. This is useful for file operations that only need to scan data within a range and do not need to seek. Therefore file metadata such as indexes does not need to be kept in memory while the file is scanned. Also seek optimizations like bloom filters do not need to be loaded.

Specified by:

openReader in class FileOperations

Throws:

IOException

openReader

public FileSKVIterator openReader(String file,
                         Range range,
                         Set<ByteSequence> columnFamilies,
                         boolean inclusive,
                         org.apache.hadoop.fs.FileSystem fs,
                         org.apache.hadoop.conf.Configuration conf,
                         AccumuloConfiguration tableConf,
                         BlockCache dataCache,
                         BlockCache indexCache)
                           throws IOException

Specified by:

openReader in class FileOperations

Throws:

IOException

openReader

public FileSKVIterator openReader(String file,
                         boolean seekToBeginning,
                         org.apache.hadoop.fs.FileSystem fs,
                         org.apache.hadoop.conf.Configuration conf,
                         AccumuloConfiguration acuconf,
                         BlockCache dataCache,
                         BlockCache indexCache)
                           throws IOException

Specified by:

openReader in class FileOperations

Throws:

IOException

openIndex

public FileSKVIterator openIndex(String file,
                        org.apache.hadoop.fs.FileSystem fs,
                        org.apache.hadoop.conf.Configuration conf,
                        AccumuloConfiguration acuconf,
                        BlockCache dCache,
                        BlockCache iCache)
                          throws IOException

Specified by:

openIndex in class FileOperations

Throws:

IOException