com.thinkaurelius.titan.diskstorage.cassandra.thrift

Class CassandraThriftKeyColumnValueStore

java.lang.Object

com.thinkaurelius.titan.diskstorage.cassandra.thrift.CassandraThriftKeyColumnValueStore

All Implemented Interfaces:

KeyColumnValueStore

public class CassandraThriftKeyColumnValueStore
extends Object
implements KeyColumnValueStore

A Titan KeyColumnValueStore backed by Cassandra. This uses the Cassandra Thrift API.

Author:

Dan LaRocque

See Also:

CassandraThriftStoreManager

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	CassandraThriftKeyColumnValueStore.AbstractBufferedRowIter<T extends org.apache.cassandra.dht.Token<?>> Slices rows and columns using tokens.

Field Summary

Fields inherited from interface com.thinkaurelius.titan.diskstorage.keycolumnvalue.KeyColumnValueStore

NO_ADDITIONS, NO_DELETIONS

Constructor Summary

Constructors

Constructor and Description
CassandraThriftKeyColumnValueStore(String keyspace, String columnFamily, CassandraThriftStoreManager storeManager, CTConnectionPool pool)

Method Summary

Modifier and Type	Method and Description
void	acquireLock(StaticBuffer key, StaticBuffer column, StaticBuffer expectedValue, StoreTransaction txh)
void	close()
KeyIterator	getKeys(KeyRangeQuery keyRangeQuery, StoreTransaction txh)
KeyIterator	getKeys(SliceQuery sliceQuery, StoreTransaction txh)
String	getName()
Map<StaticBuffer,EntryList>	getNamesSlice(List<StaticBuffer> keys, SliceQuery query, StoreTransaction txh)
Map<StaticBuffer,EntryList>	getNamesSlice(StaticBuffer key, SliceQuery query, StoreTransaction txh)
EntryList	getSlice(KeySliceQuery query, StoreTransaction txh) Call Cassandra's Thrift get_slice() method.
Map<StaticBuffer,EntryList>	getSlice(List<StaticBuffer> keys, SliceQuery query, StoreTransaction txh)
void	mutate(StaticBuffer key, List<Entry> additions, List<StaticBuffer> deletions, StoreTransaction txh)
void	mutateMany(Map<StaticBuffer,KCVMutation> mutations, StoreTransaction txh)
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

CassandraThriftKeyColumnValueStore

public CassandraThriftKeyColumnValueStore(String keyspace,
                                          String columnFamily,
                                          CassandraThriftStoreManager storeManager,
                                          CTConnectionPool pool)

Method Detail

getSlice

public EntryList getSlice(KeySliceQuery query,
                          StoreTransaction txh)
                   throws BackendException

Call Cassandra's Thrift get_slice() method.

When columnEnd equals columnStart and either startInclusive or endInclusive is false (or both are false), then this method returns an empty list without making any Thrift calls.

If columnEnd = columnStart + 1, and both startInclusive and startExclusive are false, then the arguments effectively form an empty interval. In this case, as in the one previous, an empty list is returned. However, it may not necessarily be handled efficiently; a Thrift call might still be made before returning the empty list.

Specified by:

getSlice in interface KeyColumnValueStore

Throws:

BackendException - when columnEnd < columnStart

getSlice

public Map<StaticBuffer,EntryList> getSlice(List<StaticBuffer> keys,
                                            SliceQuery query,
                                            StoreTransaction txh)
                                     throws BackendException

Specified by:

getSlice in interface KeyColumnValueStore

Throws:

BackendException

getNamesSlice

public Map<StaticBuffer,EntryList> getNamesSlice(StaticBuffer key,
                                                 SliceQuery query,
                                                 StoreTransaction txh)
                                          throws BackendException

Throws:

BackendException

getNamesSlice

public Map<StaticBuffer,EntryList> getNamesSlice(List<StaticBuffer> keys,
                                                 SliceQuery query,
                                                 StoreTransaction txh)
                                          throws BackendException

Throws:

BackendException

close

public void close()

Specified by:

close in interface KeyColumnValueStore

acquireLock

public void acquireLock(StaticBuffer key,
                        StaticBuffer column,
                        StaticBuffer expectedValue,
                        StoreTransaction txh)
                 throws BackendException

Specified by:

acquireLock in interface KeyColumnValueStore

Throws:

BackendException

getKeys

public KeyIterator getKeys(@Nullable
                           SliceQuery sliceQuery,
                           StoreTransaction txh)
                    throws BackendException

Specified by:

getKeys in interface KeyColumnValueStore

Throws:

BackendException

getKeys

public KeyIterator getKeys(KeyRangeQuery keyRangeQuery,
                           StoreTransaction txh)
                    throws BackendException

Specified by:

getKeys in interface KeyColumnValueStore

Throws:

BackendException

getName

public String getName()

Specified by:

getName in interface KeyColumnValueStore

mutate

public void mutate(StaticBuffer key,
                   List<Entry> additions,
                   List<StaticBuffer> deletions,
                   StoreTransaction txh)
            throws BackendException

Specified by:

mutate in interface KeyColumnValueStore

Throws:

BackendException

mutateMany

public void mutateMany(Map<StaticBuffer,KCVMutation> mutations,
                       StoreTransaction txh)
                throws BackendException

Throws:

BackendException

toString

public String toString()

Overrides:

toString in class Object