Uses of Class org.apache.hadoop.mapreduce.TaskAttemptContext (Hadoop 0.20.2-cdh3u1 API)
Date: 2011-07-18

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## Uses of Class
org.apache.hadoop.mapreduce.TaskAttemptContext

Packages that use TaskAttemptContext
org.apache.hadoop.examples | Hadoop example code.
org.apache.hadoop.mapred | A software framework for easily writing applications which process vast amounts of data (multi-terabyte data-sets) parallelly on large clusters (thousands of nodes) built of commodity hardware in a reliable, fault-tolerant manner.
org.apache.hadoop.mapreduce |
org.apache.hadoop.mapreduce.lib.db | org.apache.hadoop.mapred.lib.db Package
org.apache.hadoop.mapreduce.lib.input |
org.apache.hadoop.mapreduce.lib.output |

Uses of TaskAttemptContext in org.apache.hadoop.examples

Methods in org.apache.hadoop.examples with parameters of type TaskAttemptContext
`RecordReader<MultiFileWordCount.WordOffset,Text>` | `MultiFileWordCount.MyInputFormat.createRecordReader(InputSplit split, TaskAttemptContext context)`
`void` | `MultiFileWordCount.CombineFileLineRecordReader.initialize(InputSplit split, TaskAttemptContext context)`

Constructors in org.apache.hadoop.examples with parameters of type TaskAttemptContext
`MultiFileWordCount.CombineFileLineRecordReader(CombineFileSplit split, TaskAttemptContext context, Integer index)`

Uses of TaskAttemptContext in org.apache.hadoop.mapred

Subclasses of TaskAttemptContext in org.apache.hadoop.mapred
`class` | `TaskAttemptContext`

Methods in org.apache.hadoop.mapred with parameters of type TaskAttemptContext
`void` | `OutputCommitter.abortTask(TaskAttemptContext taskContext)` This method implements the new interface by calling the old method.
`void` | `OutputCommitter.commitTask(TaskAttemptContext taskContext)` This method implements the new interface by calling the old method.
`boolean` | `OutputCommitter.needsTaskCommit(TaskAttemptContext taskContext)` This method implements the new interface by calling the old method.
`void` | `OutputCommitter.setupTask(TaskAttemptContext taskContext)` This method implements the new interface by calling the old method.

Uses of TaskAttemptContext in org.apache.hadoop.mapreduce

Subclasses of TaskAttemptContext in org.apache.hadoop.mapreduce
`class` | `MapContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT>` The context that is given to the `Mapper`.
`class` | `Mapper.Context`
`class` | `ReduceContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT>` The context passed to the `Reducer`.
`class` | `Reducer.Context`
`class` | `TaskInputOutputContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT>` A context object that allows input and output from the task.

Methods in org.apache.hadoop.mapreduce with parameters of type TaskAttemptContext
`abstract void` | `OutputCommitter.abortTask(TaskAttemptContext taskContext)` Discard the task output
`abstract void` | `RecordWriter.close(TaskAttemptContext context)` Close this `RecordWriter` to future operations.
`abstract void` | `OutputCommitter.commitTask(TaskAttemptContext taskContext)` To promote the task's temporary output to final output location The task's output is moved to the job's output directory.
`abstract RecordReader<K,V>` | `InputFormat.createRecordReader(InputSplit split, TaskAttemptContext context)` Create a record reader for a given split.
`abstract OutputCommitter` | `OutputFormat.getOutputCommitter(TaskAttemptContext context)` Get the output committer for this output format.
`abstract RecordWriter<K,V>` | `OutputFormat.getRecordWriter(TaskAttemptContext context)` Get the `RecordWriter` for the given task.
`abstract void` | `RecordReader.initialize(InputSplit split, TaskAttemptContext context)` Called once at initialization.
`abstract boolean` | `OutputCommitter.needsTaskCommit(TaskAttemptContext taskContext)` Check whether task needs a commit
`abstract void` | `OutputCommitter.setupTask(TaskAttemptContext taskContext)` Sets up output for the task.

Uses of TaskAttemptContext in org.apache.hadoop.mapreduce.lib.db

Methods in org.apache.hadoop.mapreduce.lib.db with parameters of type TaskAttemptContext
`void` | `DBOutputFormat.DBRecordWriter.close(TaskAttemptContext context)` Close this `RecordWriter` to future operations.
`RecordReader<LongWritable,T>` | `DBInputFormat.createRecordReader(InputSplit split, TaskAttemptContext context)` Create a record reader for a given split.
`OutputCommitter` | `DBOutputFormat.getOutputCommitter(TaskAttemptContext context)`
`RecordWriter<K,V>` | `DBOutputFormat.getRecordWriter(TaskAttemptContext context)` Get the `RecordWriter` for the given task.
`void` | `DBRecordReader.initialize(InputSplit split, TaskAttemptContext context)`

Uses of TaskAttemptContext in org.apache.hadoop.mapreduce.lib.input

Fields in org.apache.hadoop.mapreduce.lib.input declared as TaskAttemptContext
`protected TaskAttemptContext` | `CombineFileRecordReader.context`

Methods in org.apache.hadoop.mapreduce.lib.input with parameters of type TaskAttemptContext
`RecordReader<LongWritable,Text>` | `TextInputFormat.createRecordReader(InputSplit split, TaskAttemptContext context)`
`RecordReader<K,V>` | `DelegatingInputFormat.createRecordReader(InputSplit split, TaskAttemptContext context)`
`RecordReader<K,V>` | `SequenceFileInputFormat.createRecordReader(InputSplit split, TaskAttemptContext context)`
`RecordReader<Text,Text>` | `KeyValueTextInputFormat.createRecordReader(InputSplit genericSplit, TaskAttemptContext context)`
`abstract RecordReader<K,V>` | `CombineFileInputFormat.createRecordReader(InputSplit split, TaskAttemptContext context)` This is not implemented yet.
`void` | `CombineFileRecordReader.initialize(InputSplit split, TaskAttemptContext context)`
`void` | `SequenceFileRecordReader.initialize(InputSplit split, TaskAttemptContext context)`
`void` | `LineRecordReader.initialize(InputSplit genericSplit, TaskAttemptContext context)`
`void` | `DelegatingRecordReader.initialize(InputSplit split, TaskAttemptContext context)`
`void` | `KeyValueLineRecordReader.initialize(InputSplit genericSplit, TaskAttemptContext context)`

Constructors in org.apache.hadoop.mapreduce.lib.input with parameters of type TaskAttemptContext
`CombineFileRecordReader(CombineFileSplit split, TaskAttemptContext context, Class<? extends RecordReader<K,V>> rrClass)` A generic RecordReader that can hand out different recordReaders for each chunk in the CombineFileSplit.
`DelegatingRecordReader(InputSplit split, TaskAttemptContext context)` Constructs the DelegatingRecordReader.

Uses of TaskAttemptContext in org.apache.hadoop.mapreduce.lib.output

Methods in org.apache.hadoop.mapreduce.lib.output with parameters of type TaskAttemptContext
`void` | `FileOutputCommitter.abortTask(TaskAttemptContext context)` Delete the work directory
`void` | `TextOutputFormat.LineRecordWriter.close(TaskAttemptContext context)`
`void` | `FileOutputCommitter.commitTask(TaskAttemptContext context)` Move the files from the work directory to the job output directory
`Path` | `FileOutputFormat.getDefaultWorkFile(TaskAttemptContext context, String extension)` Get the default path and filename for the output format.
`OutputCommitter` | `NullOutputFormat.getOutputCommitter(TaskAttemptContext context)`
`OutputCommitter` | `FileOutputFormat.getOutputCommitter(TaskAttemptContext context)`
`RecordWriter<K,V>` | `TextOutputFormat.getRecordWriter(TaskAttemptContext job)`
`RecordWriter<K,V>` | `SequenceFileOutputFormat.getRecordWriter(TaskAttemptContext context)`
`RecordWriter<K,V>` | `NullOutputFormat.getRecordWriter(TaskAttemptContext context)`
`abstract RecordWriter<K,V>` | `FileOutputFormat.getRecordWriter(TaskAttemptContext job)`
`static String` | `FileOutputFormat.getUniqueFile(TaskAttemptContext context, String name, String extension)` Generate a unique filename, based on the task id, name, and extension
`boolean` | `FileOutputCommitter.needsTaskCommit(TaskAttemptContext context)` Did this task write any files in the work directory?
`void` | `FileOutputCommitter.setupTask(TaskAttemptContext context)` No task setup required.

Constructors in org.apache.hadoop.mapreduce.lib.output with parameters of type TaskAttemptContext
`FileOutputCommitter(Path outputPath, TaskAttemptContext context)` Create a file output committer

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