io.kareldb.transaction.client

Class SnapshotFilterImpl

java.lang.Object

io.kareldb.transaction.client.SnapshotFilterImpl

All Implemented Interfaces:

SnapshotFilter

public class SnapshotFilterImpl
extends Object
implements SnapshotFilter

Constructor Summary

Constructors

Constructor and Description
SnapshotFilterImpl(VersionedCache versionedCache)

Method Summary

Modifier and Type	Method and Description
io.kcache.KeyValueIterator<Comparable[],List<VersionedValue>>	all(KarelDbTransaction transaction)
List<VersionedValue>	filterCellsForSnapshot(KarelDbTransaction transaction, Comparable[] key, List<VersionedValue> rawCells) Filters the raw results and returns only those belonging to the current snapshot, as defined by the transaction object.
List<VersionedValue>	get(KarelDbTransaction transaction, Comparable[] key)
com.google.common.base.Optional<Long>	getTSIfInSnapshot(KarelDbTransaction transaction, io.kcache.KeyValue<Comparable[],VersionedValue> kv, Map<Long,Long> commitCache)
com.google.common.base.Optional<Long>	getTSIfInTransaction(KarelDbTransaction transaction, io.kcache.KeyValue<Comparable[],VersionedValue> kv)
VersionedCache	getVersionedCache()
boolean	isCommitted(KarelDbTransaction transaction, KarelDbCellId cellId)
org.apache.omid.committable.CommitTable.CommitTimestamp	locateCellCommitTimestamp(KarelDbTransaction transaction, long cellStartTimestamp, org.apache.omid.transaction.CommitTimestampLocator locator) This function returns the commit timestamp for a particular cell if the transaction was already committed in the system.
io.kcache.KeyValueIterator<Comparable[],List<VersionedValue>>	range(KarelDbTransaction transaction, Comparable[] from, boolean fromInclusive, Comparable[] to, boolean toInclusive)
com.google.common.base.Optional<org.apache.omid.committable.CommitTable.CommitTimestamp>	readCommitTimestampFromShadowCell(long cellStartTimestamp, org.apache.omid.transaction.CommitTimestampLocator locator) Check if the transaction commit data is in the shadow cell
com.google.common.base.Optional<Long>	tryToLocateCellCommitTimestamp(KarelDbTransaction transaction, io.kcache.KeyValue<Comparable[],VersionedValue> cell, Map<Long,Long> commitCache)

Methods inherited from class java.lang.Object

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

Constructor Detail

SnapshotFilterImpl

public SnapshotFilterImpl(VersionedCache versionedCache)

Method Detail

getVersionedCache

public VersionedCache getVersionedCache()

readCommitTimestampFromShadowCell

public com.google.common.base.Optional<org.apache.omid.committable.CommitTable.CommitTimestamp> readCommitTimestampFromShadowCell(long cellStartTimestamp,
                                                                                                                                  org.apache.omid.transaction.CommitTimestampLocator locator)
                                                                                                                           throws IOException

Check if the transaction commit data is in the shadow cell

Parameters:

cellStartTimestamp - the transaction start timestamp locator the timestamp locator

Throws:

IOException

locateCellCommitTimestamp

public org.apache.omid.committable.CommitTable.CommitTimestamp locateCellCommitTimestamp(KarelDbTransaction transaction,
                                                                                         long cellStartTimestamp,
                                                                                         org.apache.omid.transaction.CommitTimestampLocator locator)
                                                                                  throws IOException

This function returns the commit timestamp for a particular cell if the transaction was already committed in the system. In case the transaction was not committed and the cell was written by transaction initialized by a previous TSO server, an invalidation try occurs. Otherwise the function returns a value that indicates that the commit timestamp was not found.

Parameters:

cellStartTimestamp - start timestamp of the cell to locate the commit timestamp for.

locator - a locator to find the commit timestamp in the system.

Returns:

the commit timestamp joint with the location where it was found or an object indicating that it was not found in the system

Throws:

IOException - in case of any I/O issues

tryToLocateCellCommitTimestamp

public com.google.common.base.Optional<Long> tryToLocateCellCommitTimestamp(KarelDbTransaction transaction,
                                                                            io.kcache.KeyValue<Comparable[],VersionedValue> cell,
                                                                            Map<Long,Long> commitCache)
                                                                     throws IOException

Throws:

IOException

getTSIfInTransaction

public com.google.common.base.Optional<Long> getTSIfInTransaction(KarelDbTransaction transaction,
                                                                  io.kcache.KeyValue<Comparable[],VersionedValue> kv)

getTSIfInSnapshot

public com.google.common.base.Optional<Long> getTSIfInSnapshot(KarelDbTransaction transaction,
                                                               io.kcache.KeyValue<Comparable[],VersionedValue> kv,
                                                               Map<Long,Long> commitCache)
                                                        throws IOException

Throws:

IOException

filterCellsForSnapshot

public List<VersionedValue> filterCellsForSnapshot(KarelDbTransaction transaction,
                                                   Comparable[] key,
                                                   List<VersionedValue> rawCells)
                                            throws IOException

Filters the raw results and returns only those belonging to the current snapshot, as defined by the transaction object.

Parameters:

transaction - Defines the current snapshot

rawCells - Raw cells that we are going to filter

Returns:

Filtered KVs belonging to the transaction snapshot

Throws:

IOException

get

public List<VersionedValue> get(KarelDbTransaction transaction,
                                Comparable[] key)

Specified by:

get in interface SnapshotFilter

range

public io.kcache.KeyValueIterator<Comparable[],List<VersionedValue>> range(KarelDbTransaction transaction,
                                                                           Comparable[] from,
                                                                           boolean fromInclusive,
                                                                           Comparable[] to,
                                                                           boolean toInclusive)

Specified by:

range in interface SnapshotFilter

all

public io.kcache.KeyValueIterator<Comparable[],List<VersionedValue>> all(KarelDbTransaction transaction)

Specified by:

all in interface SnapshotFilter

isCommitted

public boolean isCommitted(KarelDbTransaction transaction,
                           KarelDbCellId cellId)
                    throws org.apache.omid.transaction.TransactionException

Throws:

org.apache.omid.transaction.TransactionException