org.janusgraph.diskstorage.cql

Class CQLKeyColumnValueStore

java.lang.Object

org.janusgraph.diskstorage.cql.CQLKeyColumnValueStore

All Implemented Interfaces:

KeyColumnValueStore

public class CQLKeyColumnValueStore
extends Object
implements KeyColumnValueStore

An implementation of KeyColumnValueStore which stores the data in a CQL connected backend.

Field Summary

Fields inherited from interface org.janusgraph.diskstorage.keycolumnvalue.KeyColumnValueStore

NO_ADDITIONS, NO_DELETIONS

Constructor Summary

Constructors

Constructor and Description
CQLKeyColumnValueStore(CQLStoreManager storeManager, String tableName, Configuration configuration, Runnable closer, boolean allowCompactStorage, Supplier<Boolean> shouldInitializeTable) Creates an instance of the KeyColumnValueStore that stores the data in a CQL backed table.

Method Summary

Modifier and Type	Method and Description
void	acquireLock(StaticBuffer key, StaticBuffer column, StaticBuffer expectedValue, StoreTransaction txh)
void	close()
KeyIterator	getKeys(KeyRangeQuery query, StoreTransaction txh)
KeyIterator	getKeys(SliceQuery query, StoreTransaction txh)
String	getName()
EntryList	getSlice(KeySliceQuery query, StoreTransaction txh)
Map<StaticBuffer,EntryList>	getSlice(List<StaticBuffer> keys, SliceQuery query, StoreTransaction txh)
void	mutate(StaticBuffer key, List<Entry> additions, List<StaticBuffer> deletions, StoreTransaction txh)

Methods inherited from class java.lang.Object

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

Constructor Detail

CQLKeyColumnValueStore

public CQLKeyColumnValueStore(CQLStoreManager storeManager,
                              String tableName,
                              Configuration configuration,
                              Runnable closer,
                              boolean allowCompactStorage,
                              Supplier<Boolean> shouldInitializeTable)

Creates an instance of the KeyColumnValueStore that stores the data in a CQL backed table.

Parameters:

storeManager - the CQLStoreManager that maintains the list of CQLKeyColumnValueStores

tableName - the name of the database table for storing the key/column/values

configuration - data used in creating this store

closer - callback used to clean up references to this store in the store manager

allowCompactStorage - whether to use compact storage is allowed (true only for Cassandra 2 and earlier)

shouldInitializeTable - if true is provided the table gets initialized

Method Detail

close

public void close()
           throws BackendException

Specified by:

close in interface KeyColumnValueStore

Throws:

BackendException

getName

public String getName()

Specified by:

getName in interface KeyColumnValueStore

getSlice

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

Specified by:

getSlice in interface KeyColumnValueStore

Throws:

BackendException

getSlice

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

Specified by:

getSlice in interface KeyColumnValueStore

Throws:

BackendException

mutate

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

Specified by:

mutate in interface KeyColumnValueStore

Throws:

BackendException

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(KeyRangeQuery query,
                           StoreTransaction txh)
                    throws BackendException

Specified by:

getKeys in interface KeyColumnValueStore

Throws:

BackendException

getKeys

public KeyIterator getKeys(SliceQuery query,
                           StoreTransaction txh)
                    throws BackendException

Specified by:

getKeys in interface KeyColumnValueStore

Throws:

BackendException