co.cask.tephra.hbase94.coprocessor

Class TransactionVisibilityFilter

java.lang.Object

org.apache.hadoop.hbase.filter.FilterBase

co.cask.tephra.hbase94.coprocessor.TransactionVisibilityFilter

All Implemented Interfaces:

org.apache.hadoop.hbase.filter.Filter, org.apache.hadoop.io.Writable

public class TransactionVisibilityFilter
extends org.apache.hadoop.hbase.filter.FilterBase

Applies filtering of data based on transactional visibility (HBase 0.94 specific version). Note: this is intended for server-side use only, as additional properties need to be set on any Scan or Get operation performed.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.filter.Filter

org.apache.hadoop.hbase.filter.Filter.ReturnCode

Constructor Summary

Constructors

Constructor and Description
TransactionVisibilityFilter(Transaction tx, Map<byte[],Long> ttlByFamily, boolean allowEmptyValues, org.apache.hadoop.hbase.regionserver.ScanType scanType) Creates a new Filter for returning data only from visible transactions.
TransactionVisibilityFilter(Transaction tx, Map<byte[],Long> ttlByFamily, boolean allowEmptyValues, org.apache.hadoop.hbase.regionserver.ScanType scanType, org.apache.hadoop.hbase.filter.Filter cellFilter) Creates a new Filter for returning data only from visible transactions.

Method Summary

Methods

Modifier and Type	Method and Description
org.apache.hadoop.hbase.filter.Filter.ReturnCode	filterKeyValue(org.apache.hadoop.hbase.KeyValue kv)
void	readFields(DataInput dataInput)
void	write(DataOutput dataOutput)

Methods inherited from class org.apache.hadoop.hbase.filter.FilterBase

createFilterFromArguments, filterAllRemaining, filterRow, filterRow, filterRowKey, getNextKeyHint, hasFilterRow, isFamilyEssential, isFamilyEssential, reset, toString, transform

Methods inherited from class java.lang.Object

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

Constructor Detail

TransactionVisibilityFilter

public TransactionVisibilityFilter(Transaction tx,
                           Map<byte[],Long> ttlByFamily,
                           boolean allowEmptyValues,
                           org.apache.hadoop.hbase.regionserver.ScanType scanType)

Creates a new Filter for returning data only from visible transactions.

Parameters:

tx - the current transaction to apply. Only data visible to this transaction will be returned.

ttlByFamily - map of time-to-live (TTL) (in milliseconds) by column family name

allowEmptyValues - if true cells with empty byte[] values will be returned, if false these will be interpreted as "delete" markers and the column will be filtered out

scanType - the type of scan operation being performed

TransactionVisibilityFilter

public TransactionVisibilityFilter(Transaction tx,
                           Map<byte[],Long> ttlByFamily,
                           boolean allowEmptyValues,
                           org.apache.hadoop.hbase.regionserver.ScanType scanType,
                           @Nullable
                           org.apache.hadoop.hbase.filter.Filter cellFilter)

Creates a new Filter for returning data only from visible transactions.

Parameters:

tx - the current transaction to apply. Only data visible to this transaction will be returned.

ttlByFamily - map of time-to-live (TTL) (in milliseconds) by column family name

allowEmptyValues - if true cells with empty byte[] values will be returned, if false these will be interpreted as "delete" markers and the column will be filtered out

scanType - the type of scan operation being performed

cellFilter - if non-null, this filter will be applied to all cells visible to the current transaction, by calling Filter.filterKeyValue(org.apache.hadoop.hbase.KeyValue). If null, then Filter.ReturnCode#INCLUDE_AND_NEXT_COL will be returned instead.

Method Detail

filterKeyValue

public org.apache.hadoop.hbase.filter.Filter.ReturnCode filterKeyValue(org.apache.hadoop.hbase.KeyValue kv)

Specified by:

filterKeyValue in interface org.apache.hadoop.hbase.filter.Filter

Overrides:

filterKeyValue in class org.apache.hadoop.hbase.filter.FilterBase

write

public void write(DataOutput dataOutput)
           throws IOException

Throws:

IOException

readFields

public void readFields(DataInput dataInput)
                throws IOException

Throws:

IOException