public static interface ReduceContext.ValueIterator<VALUEIN>
Iterator to iterate over values for a given group of records.| Modifier and Type | Method and Description |
|---|---|
void |
clearMark()
Clear any previously set mark
|
void |
mark()
Mark the current record.
|
void |
reset()
Reset the iterator to the last record before a call to the previous mark
|
void |
resetBackupStore()
This method is called when the reducer moves from one key to
another.
|
forEachRemaining, hasNext, next, removevoid resetBackupStore()
throws IOException
IOExceptionvoid mark() throws IOException
IOExceptionvoid reset()
throws IOException
IOExceptionvoid clearMark()
throws IOException
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