org.apache.accumulo.core.client.mapreduce
Class AccumuloInputFormat

java.lang.Object
  org.apache.hadoop.mapreduce.InputFormat<K,V>
      org.apache.accumulo.core.client.mapreduce.AbstractInputFormat<K,V>
          org.apache.accumulo.core.client.mapreduce.InputFormatBase<Key,Value>
              org.apache.accumulo.core.client.mapreduce.AccumuloInputFormat

public class AccumuloInputFormat
extends InputFormatBase<Key,Value>

This class allows MapReduce jobs to use Accumulo as the source of data. This InputFormat provides keys and values of type Key and Value to the Map function. The user must specify the following via static configurator methods:

• AbstractInputFormat.setConnectorInfo(Job, String, AuthenticationToken)
• AbstractInputFormat.setScanAuthorizations(Job, Authorizations)
• AbstractInputFormat.setZooKeeperInstance(Job, ClientConfiguration) OR AbstractInputFormat.setMockInstance(Job, String)

Other static methods are optional.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.accumulo.core.client.mapreduce.InputFormatBase

InputFormatBase.RangeInputSplit, InputFormatBase.RecordReaderBase<K,V>

Nested classes/interfaces inherited from class org.apache.accumulo.core.client.mapreduce.AbstractInputFormat

AbstractInputFormat.AbstractRecordReader<K,V>

Field Summary

Fields inherited from class org.apache.accumulo.core.client.mapreduce.AbstractInputFormat

CLASS, log

Constructor Summary

AccumuloInputFormat()

Method Summary

org.apache.hadoop.mapreduce.RecordReader<Key,Value>

createRecordReader(org.apache.hadoop.mapreduce.InputSplit split, org.apache.hadoop.mapreduce.TaskAttemptContext context)

Methods inherited from class org.apache.accumulo.core.client.mapreduce.InputFormatBase

addIterator, fetchColumns, getAutoAdjustRanges, getFetchedColumns, getInputTableName, getIterators, getRanges, getTabletLocator, isIsolated, isOfflineScan, setAutoAdjustRanges, setInputTableName, setLocalIterators, setOfflineTableScan, setRanges, setScanIsolation, usesLocalIterators

Methods inherited from class org.apache.accumulo.core.client.mapreduce.AbstractInputFormat

getAuthenticationToken, getInputTableConfig, getInputTableConfigs, getInstance, getLogLevel, getPrincipal, getScanAuthorizations, getSplits, getTabletLocator, getToken, getTokenClass, isConnectorInfoSet, setConnectorInfo, setConnectorInfo, setLogLevel, setMockInstance, setScanAuthorizations, setZooKeeperInstance, setZooKeeperInstance, validateOptions

Methods inherited from class java.lang.Object

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

Constructor Detail

AccumuloInputFormat

public AccumuloInputFormat()

Method Detail

createRecordReader

public org.apache.hadoop.mapreduce.RecordReader<Key,Value> createRecordReader(org.apache.hadoop.mapreduce.InputSplit split,
                                                                              org.apache.hadoop.mapreduce.TaskAttemptContext context)
                                                                       throws IOException,
                                                                              InterruptedException

Specified by:

createRecordReader in class org.apache.hadoop.mapreduce.InputFormat<Key,Value>

Throws:

IOException

InterruptedException