public class IsolatedScanner extends ScannerOptions implements Scanner
Modifier and Type | Class and Description |
---|---|
static class |
IsolatedScanner.MemoryRowBuffer |
static class |
IsolatedScanner.MemoryRowBufferFactory |
static interface |
IsolatedScanner.RowBuffer |
static interface |
IsolatedScanner.RowBufferFactory |
batchTimeOut, classLoaderContext, executionHints, fetchedColumns, serverSideIteratorList, serverSideIteratorOptions, timeOut
Constructor and Description |
---|
IsolatedScanner(Scanner scanner) |
IsolatedScanner(Scanner scanner,
IsolatedScanner.RowBufferFactory bufferFactory) |
Modifier and Type | Method and Description |
---|---|
void |
close()
Closes any underlying connections on the scanner.
|
void |
disableIsolation()
Disables row isolation.
|
void |
enableIsolation()
Enables row isolation.
|
int |
getBatchSize()
Returns the batch size (number of Key/Value pairs) that will be fetched at a time from a tablet
server.
|
Range |
getRange()
Returns the range of keys to scan over.
|
long |
getReadaheadThreshold()
The number of batches of Key/Value pairs returned before the
Scanner will begin to
prefetch the next batch |
Iterator<Map.Entry<Key,Value>> |
iterator()
Returns an iterator over an accumulo table.
|
void |
setBatchSize(int size)
Sets the number of Key/Value pairs that will be fetched at a time from a tablet server.
|
void |
setRange(Range range)
Sets the range of keys to scan over.
|
void |
setReadaheadThreshold(long batches)
Sets the number of batches of Key/Value pairs returned before the
Scanner will begin to
prefetch the next batch |
addScanIterator, clearClassLoaderContext, clearColumns, clearSamplerConfiguration, clearScanIterators, fetchColumn, fetchColumn, fetchColumnFamily, getAuthorizations, getBatchTimeout, getClassLoaderContext, getFetchedColumns, getSamplerConfiguration, getTimeout, removeScanIterator, setBatchTimeout, setClassLoaderContext, setExecutionHints, setOptions, setSamplerConfiguration, setTimeout, updateScanIteratorOption
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
addScanIterator, clearClassLoaderContext, clearColumns, clearSamplerConfiguration, clearScanIterators, fetchColumn, fetchColumn, fetchColumnFamily, getAuthorizations, getBatchTimeout, getClassLoaderContext, getSamplerConfiguration, getTimeout, removeScanIterator, setBatchTimeout, setClassLoaderContext, setExecutionHints, setSamplerConfiguration, setTimeout, updateScanIteratorOption
forEach, spliterator
public IsolatedScanner(Scanner scanner)
public IsolatedScanner(Scanner scanner, IsolatedScanner.RowBufferFactory bufferFactory)
public Iterator<Map.Entry<Key,Value>> iterator()
ScannerBase
Keys returned by the iterator are not guaranteed to be in sorted order.
iterator
in interface Iterable<Map.Entry<Key,Value>>
iterator
in interface ScannerBase
iterator
in class ScannerOptions
public void setRange(Range range)
Scanner
public Range getRange()
Scanner
public void setBatchSize(int size)
Scanner
setBatchSize
in interface Scanner
size
- the number of Key/Value pairs to fetch per call to Accumulopublic int getBatchSize()
Scanner
getBatchSize
in interface Scanner
public void enableIsolation()
Scanner
enableIsolation
in interface Scanner
public void disableIsolation()
Scanner
disableIsolation
in interface Scanner
public long getReadaheadThreshold()
Scanner
Scanner
will begin to
prefetch the next batchgetReadaheadThreshold
in interface Scanner
public void setReadaheadThreshold(long batches)
Scanner
Scanner
will begin to
prefetch the next batchsetReadaheadThreshold
in interface Scanner
batches
- Non-negative number of batchespublic void close()
ScannerBase
close
in interface AutoCloseable
close
in interface ScannerBase
close
in class ScannerOptions
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